1 (Slip Opinion) OCTOBER TERM, 2023

Syllabus

NOTE: Where it is feasible, a syllabus (headnote) will be released, as is being done in connection with this case, at the time the opinion is issued. The syllabus constitutes no part of the opinion of the Court but has been prepared by the Reporter of Decisions for the convenience of the reader. See United States v. Detroit Timber & Lumber Co., 200 U. S. 321, 337. 

## SUPREME COURT OF THE UNITED STATES

Syllabus

MOORE ET UX

. v . UNITED STATES

CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT

No. 22–800. Argued December 5, 2023—Decided June 20, 2024
Congress generally taxes the income of American business entities in one of two ways. Some entities, such as S corporations and partnerships, are taxed on a pass-through basis, wher e the entity itself does not pay taxes. 26 U. S. C. §§1361–1362. Instead, the entity’s income is attributed to the shareholders or pa rtners, who then pay taxes on that income even if the entity has not di stributed any money or property to them. §§61(a)(12), 701, 1366(a)–(c). Other business entities do pay taxes directly on their income. Thos e entities’ shareholders ordinarily are not taxed on that income but ar e taxed when the entity distributes a dividend or when the shareholder sells shares.

Congress treats Amer ican-controlled foreign corporations as passthrough entities. Subpart F of the Internal Revenue Code attributes income of those business entities to American shareholders and taxes those shareholders on that income. §§951–952. Subpart F, however, applies only to a small portion of the foreign corporation’s income, mostly passive income. In 2017, Congress passed the Tax Cuts andJobs Act. As relevant here, Congress imposed a one-time, backwardlooking, pass-through tax on so me American shareholders of American-controlled fore ign corporations to address the trillions of dollars of undistributed income that had been accumulated by those foreign corporations over the ye ars. Known as the Mandatory Repatriation Tax, the tax imposed a rate from 8 to 15.5 percent on the pro rata shares of American shareholders. §§965(a)(1), (c), (d).

In this case, petitioners Charles and Kathleen Moore invested in the American-controlled foreign corpor ation KisanKraft. From 2006 to 2017, KisanKraft generated a great deal of income but did not distribute that income to its Americ an shareholders. At the end of the 2017 tax year, application of the new MRT resulted in a tax bill of2 MOORE v. UNITED STATES

Syllabus

$14,729 on the Moores’ pro rata share of KisanKraft’s accumulated income from 2006 to 2017. The Moores paid the tax and then sued for a refund, claiming, among other things, that the MRT violated the Direct Tax Clause of th e Constitution because, in their view, the MRT was an unapportioned direct tax on th eir shares of KisanKraft stock. The District Court dismissed the suit, and the Ninth Circuit affirmed.
Held : The MRT—which attributes the re alized and undistributed income

of an American-controlled foreign co rporation to the entity’s American shareholders, and then taxes the American sharehol ders on their portions of that income—does not exceed Congress’s constitutional authority. Pp. 5–24

.

(a) Article I of the Constitution affords Congress broad power to lay and collect taxes. That power includes direct taxes—those imposed on persons or property—and indirect taxes—those imposed on activities or transactions. Direct taxes must be apportioned among the States according to each State’s population, while indirect taxes are permitted without apportionment but must “be uniform throughout the United States,” §8, cl. 1. Taxe s on income are indirect taxes, and the Sixteenth Amendment confirms th at taxes on income need not be apportioned. Pp. 5–7.

(b) The Government argues that the MRT is a tax on income and therefore need not be apportioned. The Moores contend that the MRT is a tax on property and that the tax is therefore unconstitutional because it is not apportioned. In come, the Moores argue, requires realization, and the MRT does not tax any income that they have realized. But the MRT does tax realized income—namely, the income realized by KisanKraft, which the MR T attributes to the shareholders. This Court’s longstanding preceden ts, reflected in and reinforced by Congress’s longstanding practice, confirms that Congress may attribute an entity’s realized and undistributed income to the entity’s shareholders or partners and then tax the shareholders or partners on their portions of that income. Pp. 8–16. (1) The Court’s longstanding pr ecedents plainly establish that, when dealing with an entity’s undistributed income, Congress may either tax the entity or tax its sh areholders or partners. Whichever method Congress chooses, this Court has held that the tax remains a tax on income. In Burk-Waggoner Oil Assn. v. Hopkins , 269 U. S. 110, the Court held that the status of a business entity under state law could not limit Congress’s power to tax a partnership’s income as it chose, taxing either the pa rtnership or the partners. Id. , at 114. The Court reiterated th at principle in Burnet v. Leininger , 285 U. S. 136. Then, in Heiner v. Mellon , 304 U. S. 271, the Court reaffirmed that Congress may choose to tax either the partnership or the partners on the partnership’s undistributed income, even where state law did not3 Cite as: 602 U. S. ____ (2024)

Syllabus

allow the partners to personally receive the income. The principle articulated in Heiner also applies to corporations and their shareholders. Helvering v. National Grocery Co. , 304 U. S. 282. This line of precedents remains good law and establishes the clear principle that Congress can attribute the undistr ibuted income of an entity to the entity’s shareholders or part ners and tax the shareholders or partners on their pro rata share of the entity’s undistributed income. Notably, the principle has repeatedly been invoked by the lower courts in upholding subpart F.

The Moores’ reliance on Eisner v. Macomber , 252 U. S. 189, which predates the Heiner and Helvering line of cases, is misplaced. There the question was whether a distribu tion of additional stock to all existing shareholders was taxable income. The Court said no, that income requires realization and that there was no change in the value of the shareholders’ total stock hold ings in the corporation before and after the stock distribution. The Co urt said separately in dicta that “what is called the stockholder’s sh are in the accumulated profits of the company is capital, not income.” 252 U. S., at 219. The Moores’ interpret that language to mean th at a tax attributing an entity’s undistributed income to its shareholde rs or partners is not an income tax. The clear and definitive holdings in Burk-Waggoner Oil

, Heiner

, and Helvering render the Moores’ reading of Eisner implausible. Those cases squarely addressed a ttribution and allowed it, whereas Eisner did not address attr ibution. Pp. 9–14. (2) Congress’s longstanding practi ce of taxing the shareholders or partners of a business entity on the entity’s undistributed income reflects and reinforces the Court’s pr ecedents. For example, Congress passed an 1864 income-tax law that taxed shareholders or partners on “the gains and profits of all companies.” 13 Stat. 282. In 1913, Congress enacted a new income tax that, among other things, taxed partners on their “share of the profit s of a partnership.” 38 Stat. 169. As new business entities arose, Co ngress employed a similar approach to S corporations, 26 U. S. C. §§1361–1362; American shareholders of foreign business entities, 50 Stat. 822; and American shareholders of American-controlled foreign corporations, 26 U. S. C. §§951, 952, 957. Pp. 14–16.

(c) The Moores attempt to distinguish the MRT from those taxes long imposed by Congress and long upheld by this Court and argue that only the MRT is unconstitutiona l. Their ad hoc distinctions do not undermine the clear rule established by this Court’s precedents. First, the Moores argue that taxes on partnerships are distinguishable from the MRT and not controlled by precedent because partnerships are not separate entities from their partners. But that assertion is incorrect. When the Sixteenth Am endment was ratified, the courts,4 MOORE v. UNITED STATES

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Congress, and state legislatures treated partnerships as separate entities in many contexts, and numerous States imposed taxes directly on partnerships for partnership income. The federal and state treatment of partnerships as separa te legal entities for tax purposes contravenes the Moores’ theory. Second, the Moores argue that taxes on S corporations are distingu ishable from the MRT because shareholders of S corporations choose to be taxed directly on corporation income. But consent cannot explain Congress’s authority to tax the shareholders of S corporations directly on corporate income. Rather, S corporations are another example of Congress’s authority to either tax the corporation itself on corporate income or attribute the undistributed income to the shareh olders and tax the shareholders. Third, the Moores try to distinguis h Congress’s long history of taxing shareholders of closely held fore ign corporations—including through subpart F—on the ground that thos e laws apply “the doctrine of constructive realization.” That term seems to be a one-off label created by the Moores to allow them to side step any existing tax that does not comport with their proposed constitu tional rule. In any event, the Moores’ constructive-realization th eory does not distinguish the MRT from subpart F and other pass-thro ugh taxes. For example, the Moores claim that constructive realization turns on a sufficient degree of control over the entity. But the level of shareholder control with the MRT (at least 10 percent) is the same as under the longstanding subpart F tax. And if, as the M oores concede, subpart F is not unconstitutional under the “construct ive realization” theory, then the MRT is likewise not unconstitutional on that theory. Pp. 16–22.

(d) The Court’s holding is narrow and limited to entities treated as pass-throughs. Nothing in this opin ion should be read to authorize any hypothetical congressional effort to tax both an entity and its shareholders or partners on the sa me undistributed income realized by the entity. Nor does this decisi on attempt to resolve the parties’ disagreement over whether realizatio n is a constitutional requirement for an income tax. Pp. 22–24. 36 F. 4th 930, affirmed.

K

AVANAUGH , J., delivered the opinion of the Court, in which R OBERTS , C. J., and S OTOMAYOR , K AGAN , and J ACKSON , JJ., joined. J ACKSON , J., filed a concurring opinion. B ARRETT , J., filed an opinion concurring in the judgment, in which A LITO , J., joined. T HOMAS , J., filed a dissenting opinion, in which G ORSUCH , J., joined._________________

_________________ 1 Cite as: 602 U. S. ____ (2024)

Opinion of the Court

NOTICE: This opinion is subject to formal revision before publication in the United States Reports. Readers are requested to notify the Reporter of Decisions, Supreme Court of the Unit ed States, Washingt on, D. C. 20543, pio@supremecourt.gov , of any typographical or other formal errors. 

## SUPREME COURT OF THE UNITED STATES

No. 22–800

CHARLES G. MOORE, ET UX ., PETITIONERS

v. UNITED STATES

ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT
[June 20, 2024]

J USTICE K AVANAUGH delivered the opinion of the Court. For tax purposes, Congress has long treated some corporations and partnerships as pass-throughs: Congress does not tax the entity on its income, but instead attributes the undistributed income of the entity to the shareholders or partners and then taxes the shareholders or partners on that income. This Court has long upheld those taxes.Since 1962, Congress has likewise treated Americancontrolled foreign corporations as pass-throughs. That 1962 law (known as subpart F) attributes certain income, mostly passive income, of American-controlled foreign corporations to their American shareholders and then taxes those shareholders on that income. In 2017, Congress enacted a new law that attributes moreincome, including active business income, of Americancontrolled foreign corporations to their American shareholders and then taxes those shareholders on that income. The question is whether that 2017 tax (known as the Mandatory Repatriation Tax or MRT) is constitutional under Article I, §§8 and 9 and the Sixteenth Amendment. This Court’s longstanding precedents establish that the answer is yes.2 MOORE v. UNITED STATES

Opinion of the Court

I A In general, Congress taxes the income of American business entities such as corporations and partnerships in one of two ways. First, some entities such as S corporations and partnerships are taxed on a pass-through basis. (S corporations are corporations with 100 or fewer shareholders where the shareholders have elected to be taxed on a pass-through basis. 26 U. S. C. §§1361–1362.) Instead of the entity itself paying taxes, income is attributed to the entity’s owners, such as shareholders or partners, who then pay taxes on the income of the entity even if the entity has not distributed any money or property to them. §§61(a)(12), 701, 1366(a)–(c). Second, other entities are ta xed directly on their income. For example, some corporations file a return and pay taxes each year just like individual taxpayers. §11(a). When a corporation pays taxes on its income, its shareholders are ordinarily not taxed on that income. Instead, the shareholders typically pay taxes either when the corporation distributes money, stock, or other property to them as a dividend or when the shareholders sell their shares and have capital gains. §§61(a)(7), 1001. But the shareholders are not taxed on the corporate income itself. Congress has devised more nuanced rules for foreign entities such as foreign corporations. For legal and practical reasons, Congress ge nerally does not directly tax foreign corporations, includin g American-controlled foreign corporations, on the income t hat they earn outside of the United States. Instead, Congress has imposed some taxes on income of those corporations on a pass-through basis. Most notably, starting in 1962, in what is known as subpart F of the Internal Revenue Code, Congress hastreated American-controlled foreign corporations as passthrough entities: Subpart F attributes income of the3 Cite as: 602 U. S. ____ (2024)

Opinion of the Court
corporation to American shareholders, and taxes those American shareholders on that income. 26 U. S. C. §§951– 952. But subpart F applies only to a small portion of the foreign corporation’s income , mostly passive income. In 2017, Congress passed and President Trump signed the Tax Cuts and Jobs Act. 131 Stat. 2054. In a variety of ways not relevant to this ca se, the Act altered the United States’ approach to international corporate taxation. The primary goal was to encourage Americans who controlled foreign corporations to invest earnings from their foreign investments back in the United States instead of abroad. As relevant here, one piece of that intricate and multi

faceted 2017 Act imposed a new, one-time pass-through tax on some American shareholders of American-controlled foreign corporations. That one-time tax addressed one of the problems that had arisen under the old system: For decades before the 2017 Act, American-controlled foreign corporations had earned and accumulated trillions of dollars in income abroad that went almost entirely untaxed by the United States. The foreign corporations themselves were not taxed on their income . And other than subpart F, which applies mostly to passive income, the undistributed income of those foreign corporations was not attributed to American shareholders for the shareholders to be taxed. As part of the complicated transition to a more territorial system, the 2017 Act imposed a one-time, backward-looking tax on that accumulated income. That backward-looking tax is known as the Mandatory Repatriation Tax or MRT. §965. Similar in structure to subpart F, the MRT attributed the long-accumulated and undistributed income of American-controlled foreign corporations to American shareholders, and then taxed those American shareholders on their pro rata shares of that long-accumulated income at a rate from 8 to 15.5 percent. §§965(a), (c), (d). 1

——————

1 The Act also imposed a similar pass-through tax going forward.4 MOORE v. UNITED STATES

Opinion of the Court

B In 2006, Charles and Kathleen Moore invested $40,000 in an American-controlled foreign corporation that one of their friends had started in India. In return, the Moores received a 13-percent ownership share. The company, KisanKraft, generated a great de al of income. But as of 2017, KisanKraft had not distributed that income to its American shareholders, including the Moores, meaning that neither KisanKraft nor the Moores had paid U. S. taxes on that income. The MRT applied to the Moores because of their investment in KisanKraft. By the end of the 2017 tax year, the Moores’ pro rata share of KisanKraft’s accumulated income from 2006 to 2017 totaled about $508,000. After factoring in a deduction that is not relevant here, the Moores declared $132,512 in income under the MRT based on their KisanKraft shares. They owed $14,729 in taxes on that income. The Moores paid that amount, then sued for a refund. They claimed that the MRT was unconstitutional for two reasons. First, they argued that the MRT violated the Direct Tax Clause of the Constitution because, in their view, the MRT was an unapportioned direct tax on their shares of KisanKraft stock. Second, they contended that the MRT violated the Due Process Clause of the Fifth Amendment because it applied re troactively to past income. The District Court dismissed the suit, and the U. S. Court of Appeals for the Ninth Circuit affirmed. The Court of Appeals held that the MRT constitutes a tax on income within the meaning of the Constitution because “KisanKraft earned significant income, and the MRT assigns only a pro-rata share of that income to the Moores.” 36 F. 4th 930, 936–937 (2022). The Court of Appeals also

—————— §951A. That tax applies to what is referred to as “global intangible lowtaxed income.” §951A(a). That tax is not at issue in this case.5 Cite as: 602 U. S. ____ (2024)

Opinion of the Court
rejected the Moores’ due process claim regarding retroactivity. Id. , at 938–939. The Moores sought review in this Court, raising only their Direct Tax Clause argument. This Court granted certiorari. 599 U. S. ___ (2023).

II We must decide whether the 2017 Mandatory Repatriation Tax, or MRT, exceeds Congress’s constitutional authority. To analyze that question, we begin with a brief review of Congress’s taxing power under the Constitution. After Independence in 1776 and under the Articles of Confederation in effect from 1781 to 1789, the Federal Government relied primarily on contributions from the States for revenue. The Federal Government’s expenses and needs sometimes far outpaced the contributions that the States were willing to provide. As George Washington famously recognized during the Revolutionary War, reliance on the States to fund the National Government hampered important national pr iorities—including the war against the British. 12 Papers of George Washington: Revolutionary War Series 683–687 (P. Chase & F. Grizzard eds. 2002) (letter from Valley Forge). The National Government’s continuing revenue problems under the Articles of Confederation helped prompt the Constitutional Convention that convened in Philadelphia in the summer of 1787. The Federalist No. 30 (A. Hamilton). The Framers responded to the revenue problem by granting Congress an expansive taxing power. Article I of the Constitution affords Congress broad “Power To lay and collect Taxes, Duties, Imposts and Excises.” Art. I, §8, cl. 1. That power includes “ ‘two great classes of’ ” taxes—direct taxes and indirect taxes. Brushaber v. Union Pacific R. Co. , 240 U. S. 1, 13 (1916). Generally speaking, direct taxes are those taxes imposed6 MOORE v. UNITED STATES

Opinion of the Court
on persons or property. See National Federation of Independent Business v. Sebelius , 567 U. S. 519, 570–571 (2012). As a practical matter, however, Congress has rarely enacted direct taxes because th e Constitution requires that direct taxes be apportioned among the States. To be apportioned, direct taxes must be imposed “in Proportion to the Census of Enumeration.” U. S. Const., Art. I, §9, cl. 4; see also §2, cl. 3. In other words, direct taxes must be apportioned among the States according to each State’s population. So if Congress imposed a property tax on every American homeowner, the citizens of a State with five percent of the population would pay five percent of the total property tax, even if the value of their combined property added up to only three percent of the total value of homes in the United States. To pay five percent, th e tax rate on the citizens of that State would need to be substantially higher than the tax rate in a neighboring State with the same population but more valuable homes. To state the obvious, that kind of complicated and politically unpalatable result has made direct taxes difficult to enact. Indeed, the parties have cited no apportioned direct taxes in the current In ternal Revenue Code, and it appears that Congress has not enacted an apportioned tax since the Civil War. See 12 Stat. 297; E. Jensen, The Taxing Power: A Reference Guide to the United States Constitution 89 (2005). By contrast, indirect taxes are the familiar federal taxes imposed on activities or transactions. That category of taxes includes duties, imposts, and excise taxes, as well as income taxes. U. S. Const., Art. I, §8, cl. 1; Amdt. 16. Under the Constitution, indirect taxes must “be uniform throughout the United States.” Art. I, §8, cl. 1. A “ ‘tax is uniform when it operates with the same force and effect in every place where the subject of it is found.’ ” United States

v. Ptasynski , 462 U. S. 74, 82 (1983).7 Cite as: 602 U. S. ____ (2024)

Opinion of the Court
Because income taxes are indirect taxes, they are permitted under Article I, §8 without apportionment. As this Court has said, Article I, §8’s grant of taxing power “is exhaustive,” meaning that it could “never” reasonably be “questioned from the” Founding that it included the power “to lay and collect income taxes.” Brushaber , 240 U. S., at 12–13. In 1861, Congress enacted the Nation’s first unapportioned income tax. 12 Stat. 309. The Civil War income tax was recognized as an indirect tax “under the head of excises, duties and imposts.” Brushaber , 240 U. S., at 15; see also Springer v. United States , 102 U. S. 586, 598, 602 (1881). In 1895, however, in Pollock v. Farmers’ Loan & Trust Co. , this Court held that a tax on income from property equated to a tax on the property itself, and thus was a direct tax that had to be apportioned among the States. 158 U. S. 601, 627–628. The Pollock decision sparked significant confusion and controversy throughout the United States. Congress and the States responded to Pollock by approving a new constitutional amendment. Ratified in 1913, the Sixteenth Amendment rejected Pollock ’s conflation of (i) income from property and (ii) the property itself. The Amendment provides: “The Congress shall have power to lay and collect taxes on incomes, from whatever source derived , without apportionment among the several States, and without regard to any census or enumeration.” U. S. Const., Amdt. 16 (emphasis added). Therefore, the Sixteenth Amendment expressly confirmed what had been the understanding of the Constitution before Pollock : Taxes on income—including taxes on income from prope rty—are indirect taxes that need not be apportioned. Brushaber , 240 U. S., at 15, 18. Meanwhile, property taxes remain direct taxes that must be apportioned. See Helvering v. Independent Life Ins. Co.

, 292 U. S. 371, 378–379 (1934).8 MOORE v. UNITED STATES

Opinion of the Court

III With that background, we turn to the 2017 Mandatory Repatriation Tax. The MRT is not apportioned among the States. The Government argues that the MRT is a tax on income and therefore need not be apportioned. The Moores contend that the MRT is a tax on property, rather than a tax on income, and that the tax is therefore unconstitutional because it is not apportioned. What distinguishes income from property? The Moores argue that income requires realization. The Moores say that realization occurs when gains come into the taxpayer’s coffers—for example, through wages, sales, or dividends, as distinct from appreciation in the value of a home, stock investment, or other property. And the Moores contend that the MRT does not tax any income that they have realized. Critically, however, the MRT does tax realized income— namely, income realized by the corporation, KisanKraft. The MRT attributes the income of the corporation to the shareholders, and then taxes the shareholders (including the Moores) on their share of that undistributed corporate income. So the precise and narrow question that the Court addresses today is whether Congress may attribute an entity’s realized and undistributed income to the entity’s shareholders or partners, and then tax the shareholders or partners on their portions of that income. This Court’s longstanding precedents, reflected in and reinforced by Congress’s longstanding practice, establish that the answer is yes. 2

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2 As discussed below, infra , at 22–24, our analysis today does not address the distinct issues that would be raised by (i) an attempt by Congress to tax both the entity and th e shareholders or partners on the entity’s undistributed income; (ii) taxes on holdings, wealth, or net worth; or (iii) taxes on appreciation.9 Cite as: 602 U. S. ____ (2024)

Opinion of the Court

A Congress sometimes chooses to tax a business entity itself on the income that the entity earns. Alternatively, Congress sometimes elects to treat an entity as a pass

through—attributing the entity’s undistributed income to the shareholders or partners and then taxing the shareholders or partners on that income. Either way, this Court has held that the tax remains a tax on income—and thus an indirect tax that need not be apportioned. In 1925, in Burk-Waggoner Oil Assn. v. Hopkins , the Court articulated that fundamental principle. 269 U. S. 110. The case involved a tax on the income of an entity that state law treated as a partnership. Under state law, the partnership’s property was considered the property of the partners. For that reason, the partnership argued that Congress had to tax the partners on the income and could not tax the partnership. This Court rejected that argument. The Court stated: “Neither the conception of unincorporated associations prevailing under the local law, nor the relation under that law of the association to its shareholders, nor their relation to each other and to outsiders, is of legal significance as bearing upon the power of Congress to determine how and at what rate the income of the joint enterprise shall be taxed.” Id. , at 114. In other words, Congress could tax the income as it chose, taxing either the partnership or the partners on the partnership’s undistributed income. So the tax on the partnership was proper. In 1932, in Burnet v. Leininger

, the Court reiterated that principle

. 285 U. S. 136. There, the Court considered “the validity” of a tax attributing partnership income to partners. Id. , at 142. The Court again held that “Congress, having the authority to tax the net income of partnerships, could impose the liability upon the partnership directly,” or it could impose tax liability “upon the individuals carrying on business in partnership.” Ibid. (quotation marks10 MOORE v. UNITED STATES

Opinion of the Court
omitted). Next, in 1938 in Heiner v. Mellon , the Court again addressed a situation closely akin to the Moores’ case here—a tax on partners for the undistributed income of their partnership. 304 U. S. 271. In that case, the partnership earned income, but state law did not allow the partners to personally receive the income. Nonetheless, under the relevant federal tax law, the individual partners owed taxes on the partnership’s income. The partners argued that Congress could not tax them on income that they did not and could not personally receive. This Court upheld the tax on the partners, reasoning that it was immaterial that the partners did not actually receive the income earned by the partnership. The Court reaffirmed that Congress may choose to tax either the partnership or the partners on the partnership’s undistributed income. The principle articulated by this Court in Heiner v. Mellon also applies to corporations and their shareholders. On the same day in 1938 that the Court decided Heiner v. Mellon , the Court also decided Helvering v. National Grocery Co. In that case, the Court ruled that the controlling shareholder of a corporation could not “prevent Congress, if it chose to do so, from laying on him individually the tax on the year’s profits.” 304 U. S. 282, 288. Citing Heiner v. Mellon , the Court stated that Congress may tax shareholders of the corporation on the corporation’s undistributed income, in much the same way that Congress can tax the partners of a partnership on the partnership’s undistributed income. 304 U. S., at 288–289. So by 1938, this Court’s precedents had established a clear rule that directly contra dicts the Moores’ argument in this case. That line of precedent remains good law to this day. Indeed, since then, it has gone without serious question in both Congress and the federal courts that Congress can attribute the undistributed income of an11 Cite as: 602 U. S. ____ (2024)

Opinion of the Court
entity to the entity’s shareholders or partners, and tax the shareholders or partners on their pro rata share of the entity’s undistributed income. Most notably, the courts have repeatedly invoked that principle in upholding subpart F, which Congress enacted in 1962. Like the MRT, subpart F treats certain foreign corporations as pass-throughs by attributing undistributed income of foreign corporations to their American shareholders, and then taxing the American shareholders on their pro rata shares of the income. As the Second Circuit concluded in a leading case upholding subpart F: The constitutional challenge to subpart F “borders on the frivolous” in light of Heiner v. Mellon

. Garlock, Inc. v. Commissioner , 489 F. 2d 197, 202–203, and n. 5 (1973); see also Estate of Whitlock v. Commissioner , 59 T. C. 490, 507 (1972) (The “Supreme Court’s pronouncements have been to the effect that taxation of undistributed current corporate income at the stockholder level rather than at the corporate level is within the congressional power”), aff’d in relevant part, 494 F. 2d 1297, 1301 (CA10 1974) (adopting the Tax Court’s analysis); B. Bittker & L. Lokken, Federal Taxation of Income, Estates and Gifts ¶1.2.4 (2024) (noting the consensus in favor of Co ngress’s power to tax foreign corporations as pass-through businesses); cf. Eder v. Commissioner , 138 F. 2d 27, 28 (CA2 1943) (“In a variety of circumstances it has been held that the fact that the distribution of income is prevented by operation of law, or by agreement among private parties, is no bar to its taxability”). In response to that disposit ive line of precedents against them, the Moores invoke the Court’s earlier 1920 decision in Eisner v. Macomber , 252 U. S. 189. The Moores argue that some language in Eisner v. Macomber is inconsistent with the rule subsequently established in Burk-Waggoner Oil Assn. v. Hopkins

, Heiner v. Mellon , and Helvering v. National Grocery Co. and followed ever since by Congress12 MOORE v. UNITED STATES

Opinion of the Court

and the federal courts. The Moores’ reliance on Eisner v. Macomber with respect to the attribution issue is misplaced. Importantly, Eisner

v. Macomber was not a case about Congress’s power to attribute the income of an entity to the entity’s shareholders or partners. Rather, the Court in Eisner v. Macomber addressed a situation where a corporation created and distributed additional stock to existing shareholders. 252 U. S., at 200. The corporation distributed the additional shares of stock in proportion to each shareholder’s percentage of ownership. Id. , at 210– 211. So the actual value of the shareholders’ total stock holdings in the corporation did not change. Ibid. The question in Eisner v. Macomber was whether the new stock was nonetheless taxable income for the shareholders. Id. , at 199. The Court said no. Id. , at 212. The Court reasoned that there was no change in the value of the shareholders’ total stock holdin gs in the corporation before and after the stock distribution. Id. , at 210–211. So the new stock did not represent any kind of economic gain to the shareholders. Ibid. And the Court further stated that income requires realization. Id. , at 207, 211–212. Yet neither the corporation nor the shareholders had realized income from the corporation’ s creation and distribution of additional stock. Id. , at 210–213. 3

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3 The Government argues that a gain does not need to be realized to constitute income under the Consti tution. The Government contends that Eisner v. Macomber ’s discussion of realization was dicta because the stock dividend did not represent any kind of economic gain (realized or unrealized) for the shareholders. The Government further contends that Eisner v. Macomber ’s discussion of realization has, in any event, been abrogated by later decisions of this Court, such as Helvering v. Bruun

, 309 U. S. 461 (1940), Helvering v. Griffiths , 318 U. S. 371 (1943), and Commissioner v. Glenshaw Glass Co. , 348 U. S. 426 (1955). Because the MRT taxes realized income—namely, income realized by the corporation and attributed to the shareholders—w e do not address the Government’s argument that a gain need not be rea lized to constitute income under the13 Cite as: 602 U. S. ____ (2024)

Opinion of the Court
Separate from that analysis, the Court went on to say in dicta that “what is called the stockholder’s share in the accumulated profits of the company is capital, not income.” Id. , at 219. Because the corporation had already paid taxes on its income, that statement and the surrounding discussion may have been designed to cast doubt on the legality of double taxation—taxing both the corporation and its shareholders on the corporation’s undistributed income. See, e.g. , Brief for American College of Tax Counsel as Amicus Curiae 16–17; Brief for Tax Law Center at NYU Law et al. as Amici Curiae 6–7. But the Moores interpret that language in Eisner v. Macomber to mean that a tax attributing an entity’s undistributed income to its shar eholders or partners is not an income tax. The Moores’ reading is implausible. The Court in Eisner v. Macomber did not purport to address attribution, no doubt because the tax at issue there did not attribute income of the corporation to the shareholders. And if there were any ambiguity on that point, it was quickly eliminated by this Court’s clear and definitive holdings in Burk-Waggoner Oil Assn. v. Hopkins

, Heiner v. Mellon , and Helvering v. National Grocery Co. In those three cases, unlike in Eisner v. Macomber , the Court squarely addressed attribution—and allowed it. None of those cases so much as mentioned Eisner v. Macomber

, which is not surprising because, to reiterate, Eisner v. Macomber did not address attribution. So whatever else Eisner v. Macomber might stand for, it does not proscribe attribution and thus has no bearing on the attribution issue in this case. To sum up: The Court’s longstanding precedents plainly establish that, when dealing with an entity’s undistributed income, Congress may tax either (i) the entity or (ii) its

—————— Constitution. See also infra , at 22–24.14 MOORE v. UNITED STATES

Opinion of the Court
shareholders or partners. 4

B Consistent with this Court’ s case law, Congress has long taxed the shareholders and partners of business entities on the entities’ undistributed income. That longstanding congressional practice reflects and reinforces this Court’s precedents upholding those kinds of taxes. In 1864, for example, Congress passed and President Lincoln signed an income-tax law that taxed individuals on “the gains and profits of all companies, whether incorporated or partnership,” in which they were shareholders or partners. 13 Stat. 282. In 1871, the Court upheld the constitutionality of that tax. Collector v. Hubbard , 12 Wall. 1, 18. 5 In 1913, soon after the Sixteenth Amendment was ratified, Congress enacted a new income tax on shareholders for their share of the incomes of corporations formed or used to evade taxes. 38 Stat. 166. That 1913 law also taxed partners on each partner’s “share of the profits of a partnership.” Id. , at 169. As explained above, the Court upheld that approach to partnership taxation in Burnet v. Leininger , 285 U. S., at 142, and Heiner v. Mellon

, 304 U. S., at 280. Ever since that 1913 law and those cases, the basic partnership-tax rule has been settled: It “is axiomatic that each partner must pay taxes on his

——————

4 The Government acknowledges that there are due process limits on attribution to ensure that the attribution is not arbitrary—for example, limits based on the taxpay er’s relationship to the underlying income. Tr. of Oral Arg. 66–67, 96–97; see also Burnet v. Wells , 289 U. S. 670, 678– 679 (1933). In this Court, the Moores have not raised a due process issue regarding the attribution of KisanKraft’s income to them.

5 This Court’s 1895 decision in Pollock v. Farmers’ Loan & Trust Co.

, 158 U. S. 601, later proscribed unapportioned federal taxation of income from property, and therefore overruled that holding of Hubbard

. See

supra , at 7. But in 1913, the Sixteenth Amendment then overruled that aspect of Pollock

.15 Cite as: 602 U. S. ____ (2024)

Opinion of the Court
distributive share of the partnership’s income without regard to whether that amount is actually distributed to him.” United States v. Basye , 410 U. S. 441, 453 (1973). As new kinds of corporate entities arose, Congress employed a similar approach. For example, in the 1918 Revenue Act, Congress decide d to tax shareholders of personal service corporations—that is, shareholders of closely held corporations that earn most of their income from the work of their principal owners and shareholders— “in the same manner as the members of partnerships.” 40 Stat. 1070. And since 1958, the Internal Revenue Code has also taxed the shareholders of S corporations in the same way as partnerships—by taxing the shareholders on their share of the undistributed income of the corporation. See Bufferd

v. Commissioner , 506 U. S. 523, 524–525 (1993). S corporations are corporations with 100 or fewer shareholders where the shareholders have elected to be taxed directly on the corporate income. 26 U. S. C. §§1361– 1362. A majority of the corporations in the United States are S corporations, so the taxation of individual shareholders of S corporations is widespread. In addition, Congress has long taxed major American shareholders of foreign business entities on some of the income of those entities. For example, in 1937, Congress taxed American shareholders of foreign personal holding companies on those companies’ undistributed income. 50 Stat. 822. And in 1962, Congress enacted subpart F, which remains in place to this day. 76 Stat. 1006, 26 U. S. C. §951 et seq. To reiterate, subpart F taxes American shareholders of American-controlled foreign corporations on several kinds of undistributed corporate income, mostly passive income. §§951, 952, 957. And as noted above, in light of this Court’s precedents, the Courts of Appeals have uniformly rejected constitutional challenges to subpart F. See Garlock , 48916 MOORE v. UNITED STATES

Opinion of the Court

F. 2d, at 202–203, and n. 5 (the constitutional challenge to subpart F “borders on the frivolous” in light of Heiner v. Mellon ); Estate of Whitlock , 494 F. 2d, at 1301. In short, before and after ratification of the Sixteenth Amendment, Congress has often taxed the shareholders or partners of a business entity on the entity’s undistributed income. Such a “[l]ong settled and established practice” can carry “great weight in” resolv ing constitutional questions— and here it reflects and reinfo rces this Court’s precedents. Chiafalo v. Washington , 591 U. S. 578, 592 (2020) (quotation marks omitted); see also Moore v. Harper , 600 U. S. 1, 32 (2023) (The Court has “long looked to ‘settled and established practice’ to interp ret the Constitution” (quoting The Pocket Veto Case , 279 U. S. 655, 689 (1929))); Walz v. Tax Comm’n of City of New York , 397 U. S. 664, 678 (1970) (An “unbroken practice . . . is not something to be lightly cast aside”); The Federalist No. 37, p. 229 (C. Rossiter ed. 1961) (J. Madison).

IV The Moores are obviously aware of those longstanding congressional practices and Su preme Court precedents, so they had two choices of how to deal with that stark reality in this Court. They could have argued that all of those taxes are unconstitutional and that a ll of those precedents should be overruled. Or in an effort to contain the blast radius of their legal theory, they could have tried to distinguish the MRT from those other taxes and argue that only the MRT is unconstitutional. They chose the latter approach. To be specific: The Moores explicitly concede that partnership taxes, S-corporation taxes, and subpart F taxes are income taxes that are constitutional and need not be apportioned. Tr. of Oral Arg. 9, 48; Brief for Petitioners 50– 51. The Moores likewise do not ask the Court to overrule any of the precedents that we have discussed above, which upheld the attribution of entities’ undistributed income.17 Cite as: 602 U. S. ____ (2024)

Opinion of the Court

Id. , at 49–52. Instead, the Moores seek to differentiate the MRT from all of those other taxes long imposed by Congress and long upheld by this Court. The Moores have advanced an array of ad hoc distinctions to try to explain why those longstanding taxes are constitutional and why those precedents are correct, and to simultaneously try to explain why those taxes and precedents do not eviscerate their argument that the MRT is unconstitutional. But the Moores’ effort to thread that needle, although inventive, is unavailing. According to the Moores: (1) taxes on partnerships are distinguishable from the MRT and not controlled by precedent because partnerships are not separate entities from their partners; (2) taxes on S corporations are distinguishable from the MRT and not controlled by precedent because shareholders of S corporations choose to be taxed directly on corporate income; and (3) subpart F taxes on American shareholders’ portions of undistributed foreign corporate income are distinguishable from the MRT and not controlled by precedent because those taxes apply what the Moores call “constructive realization.” To begin, and perhaps most importantly, the Moores’ set of ad hoc distinctions does not undermine the clear rule established by this Court’s precedents: Congress can choose either to tax the entity on its income or to tax the entity’s shareholders or partners on their share of the entity’s undistributed income. Burk-Waggoner Oil Assn. v. Hopkins , 269 U. S. 110, 114 (1925). In any event, the Moores’ attempted distinctions of the various taxes fail on their own terms. First, the Moores contend that partners can be taxed on a partnership’s income only because, as of the time that the Sixteenth Amendment was ratified in 1913, partnerships were not seen as legal entities separate from the partners. But that assertion is incorrect. When the Sixteenth18 MOORE v. UNITED STATES

Opinion of the Court
Amendment was ratified, the courts, Congress, and state legislatures treated partnerships as separate entities in many contexts. See, e.g. , Forsyth v. Woods , 11 Wall. 484, 486 (1871) (“The partnership is a distinct thing from the partners themselves . . . ”); W. Cowles, The Firm as a Legal Person, 57 Central L. J. 343 (1903) (citing many additional ratification-era cases); see al so H. Black, Law of Income Taxation Under Federal and State Laws 100 (1913) (The “undivided earnings of a partnership . . . properly constitute income of the firm but not of the individual partners”); 30 Stat. 545, 547–548 (1898) (federal bankruptcy law that treated partnerships as separate entities); F. Burdick, Law of Partnership, ch. 3, §1, pp. 85– 86 (rev. 2d ed. 1906) (It “is becoming more and more customary for legislation and judicial decisions to treat a partnership as an entity”). During the time period around ratification of the Sixteenth Amendment, moreover, numerous States imposed taxes directly on partnerships for partnership income. 1 S. Rowley, The Modern Law of Partnership §306 (1916); 2 id. , §935, at 1295, and n. 1 (collecting 21 state laws); Black 146. And during World War I, Congress enacted the Revenue Act of 1917, which also imposed a tax directly on partnerships. 40 Stat. 303. The federal and state treatment of partnerships as separate legal entitiesfor tax purposes contravenes the Moores’ theory that passthrough taxation is inherent in the nature of partnerships rather than a legislative choice. In short, the Moores are incorrect to claim that partnerships were not historically seen as separate taxable entities. To be sure, courts declined to recognize partnerships as separate entities in certain co mmon-law contexts. 1 Rowley §118; Burdick, ch. 3, §1. But those cases simply demonstrate that partnerships were (and are) flexible entities that can receive flexible legal treatment. Those19 Cite as: 602 U. S. ____ (2024)

Opinion of the Court
cases are consistent with the longstanding principle recognized by this Court that “Congress, having the authority to tax the net income of partnerships, could impose the liability upon the partnership directly, as it did under the Revenue Act of 1917, or upon the ‘individuals carrying on business in partnership.’ ” Burnet v. Leininger

, 285 U. S. 136, 142 (1932) (citation omitted). As with other business entities, Congress may choose whether to tax (i) the entity or (ii) its shareholders or partners on the entity’s undistributed income. Second , the Moores seek to distinguish the taxation of S corporations by saying that s hareholders’ choice to become an S corporation necessarily me ans that the S corporation’s income is truly the shareholders’ income. But consent cannot explain S-corporation taxation; after all, consent to taxation as an S corporation can be revoked only if shareholders who hold a majority of the corporation’s shares agree. 26 U. S. C. §1362(d)(1)(B). So, for example, if shareholders who hold 49 percent of the shares no longer consent to paying taxes on undistributed earnings, they nonetheless still must do so. Moreover, there is no reason to think that shareholder consent can eliminate the apportionment requirement (which is a structural requirement of the Constitu tion) and allow Congress to enact an otherwise unconstitutional tax. In short, the Moores’ consent theory does not explain Congress’s authority to tax the shareholders of S corporations directly on corporate income. Rather, S corporations are another exampl e of Congress’s authority to either tax the corporation itself on corporate income or attribute the undistributed income to the shareholders and tax the shareholders. Third , the Moores try to distinguish Congress’s long history of taxing shareholders of closely held foreign corporations—including through subpart F—on the ground that those laws apply “the doctrine of constructive20 MOORE v. UNITED STATES

Opinion of the Court

realization.” Brief for Petitioners 47. The Moores have not pointed to any use of the phrase “constructive realization” in this Court’s case law or the Internal Revenue Code. Instead, the term seems to be a one-off label woven out of whole cloth by the Moores to allow them to sidestep any existing ta x, especially subpart F, that does not accord with their prop osed constitutional rule. See Brief for American Tax Policy Institute as Amicus Curiae 28 (noting that “ ‘constructive realization’ actually is a new, amorphous phrase of petitioners’ devising”). In any event, whatever its label, the Moores’ constructive-realization theory does not distinguish the MRT from subpart F and other pass-through taxes. For example, the Moores claim that constructive realization turns on a sufficient degree of control over the entity. But the level of shareholder contro l with the MRT (at least 10 percent) is the same as under the longstanding subpart F tax. (And control provides an even less persuasive distinction for partners and for shareholders of S corporations, who may have even less than a 10 percent share and still have the entity’s income attributed to them.) As part of their effort to distinguish the MRT from subpart F, the Moores also argue that subpart F is limited to taxing “ ‘movable income’ ” that may have been shifted abroad to avoid taxes. Brief for Petitioners 45. But that is not accurate. Subpart F also includes income from doing business in a country under certain sanctions. §952(a)(5). Moreover, like subpart F, the MRT responds to concerns that the owners of American-co ntrolled foreign corporations keep money offshore to defer taxa tion. So it is not clear why the MRT would not also satisf y the Moores’ requirement of an anti-tax-avoidance purpose. Therefore, even if we were to accept the Moores’ constructive-realization nomenclature and theory, theMoores’ concession that subpart F imposes taxes on socalled constructively realized income would necessarily21 Cite as: 602 U. S. ____ (2024)

Opinion of the Court
mean that the MRT likewise imposes taxes on constructively realized income. After all, the MRT is integrated into subpart F’s framework, and it has the same essential features as subpart F. If subpart F is not unconstitutional under the “constructive realization” theory—and the Moores explicitly concede that it is not, Tr. of Oral Arg. 9—then the MRT is likewise not unconstitutional on that theory. In short, the Moores cannot meaningfully distinguish the MRT from similar taxes such as taxes on partnerships, on S corporations, and on subpart F income. 6 The upshot is that the Moores’ argument, taken to its logical conclusion, could render vast swaths of the Internal Revenue Code unconstitutional. See, e.g. , 26 U. S. C. §305(c) (deemed stock distributions); §§446, 448 (accrual accounting); §701 (partnership taxation); §§951–965 (subpart F); §951A (pass-through tax on global intangible low-taxed income); §1256(a) (certain futures contracts); §1272(a) (original

issue discount instruments); §§1361–1379 (S corporations); §§2501–2524 (gift taxes). And those tax provisions, if suddenly eliminated, would deprive the U. S. Government and the American people of trillions in lost tax revenue. The logical implications of the Moores’ theory would therefore require Congress to either drastically cut critical national programs or significantly increase taxes on the remainin g sources available to it— including, of course, on ordinary Americans. The

——————

6 The MRT applies to income that wa s realized and ac cumulated in the past by foreign corporations, but not taxed by the United States. In the lower courts, the Moores raised a due process retroactivity argument— that the MRT taxes income that was earned too far in the past. The Ninth Circuit rejected that argument based on this Cour t’s decision in United States v. Carlton , 512 U. S. 26, 30 (1994). And the Moores did not seek certiorari on that issue. “We do not normally consider a separate legal question not raised in the certio rari briefs,” and “see no reason to make an exception here.” Kasten v. Saint-Gobain Performance Plastics Corp. , 563 U. S. 1, 17 (2011); see al so this Court’s Rule 14.1(a).22 MOORE v. UNITED STATES

Opinion of the Court
Constitution does not require that fiscal calamity. 7

* * * The MRT attributes the undistributed income of American-controlled foreign corp orations to their American shareholders, and then taxes the American shareholders on that income. By doing so, the MRT operates in the same basic way as Congress’s longstanding taxation of partnerships, S corporations, and subpart F income. And the MRT is consistent with the principles that this Court articulated in upholding those kinds of taxes in cases such

as Burk-Waggoner Oil Assn. v. Hopkins

, Heiner v. Mellon

, and Helvering v. National Grocery Co. The MRT therefore falls squarely within Congress’s constitutional authority to
tax. For their part, the dissent and the opinion concurring in the judgment focus primarily on the realization issue— namely, whether realization is required for an income tax. We do not decide that question today. When they reach the attribution question that we do decide, the separate opinions disagree with our reading of some of the Court’s precedents. We respect their views. But as we thoroughly explained above, we read the Co urt’s precedents differently. That said, we emphasize that our holding today is narrow. It is limited to: (i) taxation of the shareholders of an entity, (ii) on the undistributed income realized by the entity, (iii) which has been attributed to the shareholders,

——————

7 According to the Moores, because the Internal Revenue Code’s “definition of ‘gross income’ exerts the full measure of Congress’s taxing power,” a ruling against them would instantly subject all American stockholders to taxes on corporate income. Tr. of Oral Arg. 4–5. That claim is entirely incorrect. Congress has chosen to directly tax some corporations on their income. See 26 U. S. C. §11. Congress’s choice to tax the entity rather than the shareholders controls in that context, just as its contrary choice to tax certain shareholders or partners, not the entity, on the entity’s undistribu ted income controls for the MRT, partnerships, S corporations, and subpart F.23 Cite as: 602 U. S. ____ (2024)

Opinion of the Court
(iv) when the entity itself has not been taxed on that income. In other words, our holding applies when Congress treats the entity as a pass-through. 8 To be clear, as we indicated earlier, the Due Process Clause proscribes arbitrary attribution. See supra , at 14,

n. 4. And nothing in this opinion should be read to authorize any hypothetical cong ressional effort to tax both an entity and its shareholders or partners on the same undistributed income realized by the entity. In such a scenario, the entity would not simply be a traditional pass

through. 9 In addition, as the Government explains, other kinds of taxes could of course raise different issues. See Tr. of Oral Arg. 58–59, 62, 127–128. In its brief and at oral argument, for example, the Government indicated that a hypothetical unapportioned tax on an individual’s holdings or property (for example, on one’s wealth or net worth) might be considered a tax on property, not income. See Brief for United States 19 (distinguishing an income tax from a tax on wealth or net worth because “an income tax targets economic gain ‘between two points of time’ ”); Tr. of Oral Arg. 69, 127–128. And the Government further acknowledges that the constitutionality of a hypothetical unapportioned tax on appreciation may depend on, among other things, whether realization is a constitutio nal requirement for an income tax. See id. , at 58–59, 62, 70, 93–95, 106–108, 126–127; see

——————

8 The opinion concurring in the judgment reads the Court’s attribution precedents to draw a line that might call for a “different” conclusion for “a tax on shareholders of a widely held or domestic corporation.” Post , at 1 (opinion of B ARRETT , J.). We do not agree th at the Court’s precedents draw such a line. Nor does our opinion today draw such a line.

9 That issue is distinct from Congress’s well-established practice of taxing the corporation on corporate in come and then taxing shareholders when they receive a dividend. See Hellmich v. Hellman , 276 U. S. 233, 237–238 (1928); see also United States v. Hemme , 476 U. S. 558, 572 (1986).24 MOORE v. UNITED STATES

Opinion of the Court
also Brief for United States 32. The Moores argue that realization is a constitutional requirement; the Government argues that it is not. To decide this case, we need not resolve that disagreement over realization. Those are potential issues for another day, and we do not address or resolve any of those issues here. As to the Moores’ case, Congress has long taxed shareholders of an entity on the entity’s undistributed income, and it did the same with the MRT. This Court has long upheld taxes of that kind, and we do the same today with the MRT. We affirm the judgment of the U. S. Court of Appeals for the Ninth Circuit.

It is so ordered._________________

_________________ 1 Cite as: 602 U. S. ____ (2024)

J ACKSON , J., concurring 

## SUPREME COURT OF THE UNITED STATES

No. 22–800

CHARLES G. MOORE, ET UX ., PETITIONERS

v. UNITED STATES

ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT
[June 20, 2024]

J USTICE J ACKSON , concurring. Our Constitution grants Congress “plenary power” over taxation. Brushaber v. Union Pacific R. Co. , 240 U. S. 1, 13 (1916). The text supplies only two relevant conditions: Di

rect taxes must be apportioned among the States based on population, see Art. I, §9; all other taxes must “be uniform throughout the United States,” §8. During the century af

ter our Nation’s founding, the Court repeatedly recognized that, in matters of tax policy, Congress’s view was control

ling. See, e

. g ., Pacific Ins. Co. v. Soule , 7 Wall. 433, 443 (1869) (“Where the power of taxation, exercised by Con

gress, is warranted by the Constitution . . . it is, necessarily, unlimited in its nature”); Collector v. Hubbard , 12 Wall. 1, 18 (1871) (upholding a tax on undistributed corporate earn

ings because “it is as competent for Congress to tax annual gains and profits before they are divided among the holders of the stock as afterwards”). Then came Pollock v. Farmers’ Loan & Trust Co. , 158 U. S. 601 (1895). In that case, the Court invalidated a fed

eral income tax, holding that a tax on income derived from property was a direct tax requiring apportionment. See id

., at 637. Pollock provoked immediate outcry. President Taft, later Chief Justice of this Court, said, “ ‘Nothing has ever injured the prestige of the Supreme Court more.’ ” B. Acker

man, Taxation and the Constitution, 99 Colum. L. Rev. 1, 52 MOORE v. UNITED STATES

J ACKSON , J., concurring
(1999). In 1913, the People’s representatives responded, us

ing their power to overturn Pollock via constitutional amendment. The Sixteenth Amendment restored to Con

gress the power to tax “incomes , from whatever source de

rived, without apportionment.” Against that stark backdrop, the Court wisely takes a re

strained approach today. Petitioners allege that the Man

datory Repatriation Tax (MRT) exceeded Congress’s power by taxing shareholders on the undistributed income of a cor

poration; such a tax, petitioner s argue, is really a direct tax requiring apportionment. The majority opinion rightly re

jects that challenge, thoroughly explaining why the MRT falls within Congress’s long-recognized, oft-exercised power to tax shareholders on the undistributed income of a busi

ness entity. See ante, at 22. I write separately to empha

size that, before taking up peti tioners’ invitation to strike down a lawfully enacted tax, the Court would need to be persuaded of several additional arguments that we wisely do not reach. I highlight two. First, we would need to agree with petitioners that Con

gress can tax income only if it is actually received or “real

ized.” That alleged requirement appears nowhere in the text of the Sixteenth Amendment. See Brief for John R. Brooks et al. as Amici Curiae 14–21 (explaining that the phrase “from whatever source derived” served only to over

rule Pollock ). Moreover, both before and after the Sixteenth Amendment was adopted, the term “income” was widely recognized as flexible enough to include both realized and unrealized gains. See Brief for United States 14–26 (col

lecting sources); Brief for Professors of Tax Law et al. as Amici Curiae 6–20 (same). The alleged realization requirement is, instead, drawn from a decision of this Court, Eisner v. Macomber , 252 U. S. 189 (1920). Macomber struck down a tax on stock divi

dends, ostensibly because the taxpayer “ha[d] not realized or received any income in the transaction.” Id ., at 212. Like3 Cite as: 602 U. S. ____ (2024)

J ACKSON , J., concurring

Pollock

, Macomber was “promptly and sharply criticised.” Helvering v. Griffiths , 318 U. S. 371, 373 (1943). Over the two decades that followed our pronouncement, we “limited” Macomber ’s realization requirement “to the kind of divi

dend there dealt with,” 318 U. S., at 375, while also “under

min[ing] . . . the original theoretical bases of the decision in” other contexts, id ., at 394. Thus, there is no constitutional requirement, from Macomber or otherwise, that a taxpayer “be able to sever . . . the gain from his original capital” in order to be taxed on it. Helvering v. Bruun , 309 U. S. 461, 469 (1940); see also Cot

tage Savings Assn. v. Commissioner , 499 U. S. 554, 559 (1991) (explaining that, proper ly understood, “the concept of realization is ‘founded on administrative convenience,’ ” compared to the “ ‘cumbersome’ ” process of “valuing assets on an annual basis to determine . . . appreciat[ion]”). In the lower courts too, Macomber ’s definition of income has long been deemed outmoded, if not overruled. 1 Any litigant seeking to sustain her case on the basis of Macomber would have to bring back from the dead its Court-created limit on Congress’s power. 2

——————

1 See, e

. g ., Commissioner v. Obear-Nester Glass Co. , 217 F. 2d 56, 60 (CA7 1954) (“Even as to income derived from capital [ Macomber ] has been limited to its specific facts”); United States v. James , 333 F. 2d 748, 752 (CA9 1964) (“[I]nsofar as [ Macomber ] purported to offer a compre

hensive definition of the term inco me as used in the Sixteenth Amend

ment, it has been discarded”); Prescott v. Commissioner , 561 F. 2d 1287, 1293 (CA8 1977) (“[T]he Supreme Court has found it necessary to aban

don [ Macomber ’s] attempt at an all-inclusive definition of income”).

2 To be sure, Macomber is a hard decision to parse, and it might be read to allow taxation of an asset on ly if the owner receives some new, increased value. See Eisner v. Macomber , 252 U. S. 189, 211 (1920) (em

phasizing that a stock dividend does not necessarily “increase the intrin

sic value of [the taxpayer ’s] holding”); see also Koshland v. Helvering

, 298 U. S. 441, 445–446 (1936). If that reading is correct, Macomber would not preclude taxation of unrea lized gains. See Brief for United States 33–34; Brief for Alex Zhang as Amicus Curiae 26.4 MOORE v. UNITED STATES

J ACKSON , J., concurring
Second, even if we were to hold that a uniform tax vio

lated the Sixteenth Amendment, we would still need to con

firm that the tax was a dire ct tax before requiring appor

tionment. The Constitution does not exhaustively define direct taxes, though it appear s the category was originally intended to encompass only land and head taxes. See, e

. g ., Hylton v. United States , 3 Dall. 171, 175 (1796) (opinion of Chase, J.); id ., at 177 (opinion of Paterson, J.); id. at 183 (opinion of Iredell, J.). But the Constitution does expressly exclude certain taxes—“Duties, Imposts and Excises”— from apportionment, and we have long interpreted those categories of taxes broadly. Art. I, §8; see also Steward Ma

chine Co. v. Davis , 301 U. S. 548, 581–582 (1937). Indeed, we have upheld uniform taxes as excises, even when predi

cated on something that, if taxed on its own, might require apportionment or even be nontaxable. See Flint v. Stone Tracy Co. , 220 U. S. 107, 150–152, 165 (1911). In this case, the Government argues that the MRT can be understood as an excise tax on the privilege of doing business through a controlled foreign corporation. See Brief for United States 46–49. That argument, too, would need to be considered before we could strike down a uniform tax like the MRT.

* * *
I have no doubt that future Congresses will pass, and fu

ture Presidents will sign, taxes that outrage one group or another—taxes that strike some as demanding too much, others as asking too little. There may even be impositions that, as a matter of policy, all can agree are wrongheaded. However, Pollock teaches us that this Court’s role in such disputes should be limited. “[T]he remedy for such abuses is to be found at the ballot-box, and in a wholesome public opinion which the representatives of the people will not long, if at all, disregard, and not in the disregard by the ju

diciary of powers that have been committed to another5 Cite as: 602 U. S. ____ (2024)

J ACKSON , J., concurring
branch of the government.” Pollock , 158 U. S., at 680 (Har

lan, J., dissenting). With that understanding, I join the Court’s opinion in full._________________

_________________ 1 Cite as: 602 U. S. ____ (2024)

B ARRETT , J., concurring in judgment 

## SUPREME COURT OF THE UNITED STATES

No. 22–800

CHARLES G. MOORE, ET UX ., PETITIONERS

v. UNITED STATES

ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT
[June 20, 2024]

J USTICE B ARRETT , with whom J USTICE A LITO joins, con

curring in the judgment. This case comes down to two questions. Have the Moores realized income from their KisanKraft shares? And if they have not, may Congress attribute KisanKraft’s income to the Moores? Our precedent already decides the first question: Share

holders receive income when they sell their shares or when a corporation distributes profit s back to its investors by de

claring a dividend. Notwithstanding this precedent, the Government asserts its powe r to tax without apportion

ment all economic gains, including appreciation in property value. The Court does not address this issue. Ante , at 8. It focuses on the second instead, and, casting our precedent as well settled, holds that Congress can attribute KisanKraft’s income to the Moores. As I explain below, I think the issue is more complex than the Court lets on. But whatever my disagreement with the Court’s reasoning, it bears emphasis that the Moores’ case involves the Mandatory Repatriation Tax (MRT), which is a specific tax imposed upon the Amer

ican shareholders of a closely held foreign corporation. A different tax—for example, a tax on shareholders of a widely held or domestic co rporation—would present a dif

ferent case.2 MOORE v. UNITED STATES

B ARRETT , J., concurring in judgment

I The question on which we granted review is “[w]hether the Sixteenth Amendment authorizes Congress to tax un

realized sums without apportionment among the states.” Pet. for Cert. i. The answer is straightforward: No.

A The Constitution distinguishes between taxes on income and taxes on property. Income taxes must apply uniformly across the country, Art. I, §8, cl. 1, while “direct” taxes— like property taxes—must be apportioned among the States, §2, cl. 3; §9, cl. 4. 1 Apportionment is an onerous bur

den, both technically and politically, because it requires Congress to allocate the total tax liability to each State ac

cording to its population. There have been very few federal property taxes in this nation’s history (and none in the mod

ern era). By design and in fact, the apportionment rule has left property taxation prim arily to the States. See post , at 7–12 (T HOMAS , J., dissenting). In Pollock v. Farmers’ Loan & Trust Co. , the Court held that the apportionment rule applies not only to taxes on real and personal property, but also to taxes on income “de

rived” from that property—say, rents from leasing farm

land. 158 U. S. 601, 618 (1895). The decision left Congress effectively unable to tax most nonlabor income. The Six

teenth Amendment overruled Pollock ’s second holding, stating that “Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment.” But it did not overrule Pollock ’s first hold

ing that taxes on personal property are direct taxes. See Brushaber v. Union Pacific R. Co. , 240 U. S. 1, 19 (1916);

——————

1 Direct taxes also include a capitation tax, which imposes a tax on every person “without regard to pr operty, profession, or any other cir

cumstance.” National Federation of Independent Business v. Sebelius

, 567 U. S. 519, 571 (2012) ( NFIB ) (internal quotation marks omitted; em

phasis deleted).3 Cite as: 602 U. S. ____ (2024)

B ARRETT , J., concurring in judgment
National Federation of Independent Business v. Sebelius

, 567 U. S. 519, 571 (2012). As the text of the Sixteenth Amendment indicates, in

come is financial gain that “derive[s]” from property or an

other source. See, e

. g ., United States v. Phellis , 257 U. S. 156, 168–169 (1921); Stratton’s Independence

, Ltd. v. How

bert , 231 U. S. 399, 415 (1913); Webster’s New Interna

tional Dictionary 1089 (1909) (Webster’s) (“income” is “[t]hat gain or recurrent benefit (usually measured in money) which proceeds from labor, business, or property”). To capture the distinction between property and income, we have described property as the “seed” and income as the “fruit that it will yield.” United States v. Safety Car Heating & Lighting Co. , 297 U. S. 88, 99 (1936). Thus, a condomin

ium is a landlord’s property, and rents are the income she receives from leasing it. A pa tent is an inventor’s property, and royalties are the income she receives from licensing it. A capital fund is a banker’s property, and interest is the income she receives from lending it. The Sixteenth Amendment’s reference to income “de

rived” from any source encompasses a requirement that in

come, to be taxed without apportionment, must be realized

. See post , at 23–25 (T HOMAS , J., dissenting). While the Gov

ernment stresses that the Amendment did not include a “re

alization” requirement, Brief for United States 15–16, “re

alize” and “derive” have long re ferred to the same concept. Compare Webster’s 1778 (“realize” means to “convert an in

tangible right or property into real (tangible) property”; to “convert any kind of property (considered as fluctuating or uncertain in value) into money”), with id ., at 601 (“deriva

tion” is the “[a]ct of receiving anything from a source, as profits from capital”). The Court has used “realization” this way (including in today’s opinion) when discussing income taxes on corporate shareholders. See, e

. g ., ante , at 8; Culli

nan v. Walker , 262 U. S. 134, 138 (1923). And we have also4 MOORE v. UNITED STATES

B ARRETT , J., concurring in judgment used the term “realized” in cases involving a tax on accu

mulated corporate earnings, Ivan Allen Co . v. United States , 422 U. S. 617, 627–629 (1975), debt discharge, United States v. Kirby Lumber Co. , 284 U. S. 1, 3 (1931), real estate improvements, Helvering v. Bruun , 309 U. S. 461, 469 (1940), punitive damages, Commissioner v. Glen

shaw Glass Co. , 348 U. S. 426, 431 (1955), and meal allow

ances, Commissioner v. Kowalski , 434 U. S. 77, 83 (1977), to name a few. Many opinions use “derived” and “realized” more or less interchangeably. See, e

. g ., Diedrich v. Com

missioner , 457 U. S. 191, 199 (1982); Commissioner v. Ja

cobson , 336 U. S. 28, 39 (1949); Helvering v. Horst , 311 U. S. 112, 118 (1940); Goodrich v. Edwards , 255 U. S. 527, 535 (1921); Gray v. Darlington , 15 Wall. 63, 65–66 (1872); Pol

lock , 158 U. S., at 696 (Jackson, J., dissenting). The “commonly understood meaning of the term” income when the Sixteenth Amendment was ratified requires that a gain be “realized” or “derived”— e

. g ., through a sale or other transaction—to be taxed without apportionment. Merchants’ Loan & Trust Co. v. Smietanka , 255 U. S. 509, 519–520 (1921); see post , at 23–25 (T HOMAS , J., dissenting)

. “Income within the meaning of the Sixteenth Amendment . . . is income as the word is known in the common speech of men.” Safety Car , 297 U. S., at 99. And in the years sur

rounding the ratification of the Sixteenth Amendment, in

come “was used in ordinary parl ance to refer only to real

ized gains.” Brief for Professors of Law and Linguistics as Amicus Curiae 17; see id. , at 18–22 (instances of the word “income” between 1900 and 1912 in the Corpus of Historical American English referred to “eco nomic gain tied to a real

ization event”). Regardless of whether one uses the term “derived” or “re

alized,” the important point is this: The Sixteenth Amend

ment and the Direct Tax Clause distinguish between taxes on property, which are subject to apportionment, and taxes on income derived or realized from that property, which are5 Cite as: 602 U. S. ____ (2024)

B ARRETT , J., concurring in judgment

not.

B
The Moores have not realized income from their KisanKraft shares. Shares yi eld income when the corpora

tion declares a dividend— i

. e ., when the corporation distrib

utes its profits to shareholders. See Lynch v. Hornby , 247 U. S. 339, 344 (1918) (“Dividends are the appropriate fruit of stock ownership [and] are commonly reckoned as in

come”); Gibbons v. Mahon , 136 U. S. 549, 557–558 (1890). But KisanKraft has never decl ared a dividend. Nor have the Moores realized income by selling or otherwise dispos

ing of their shares. See Taft v. Bowers , 278 U. S. 470, 481– 482 (1929). Because they have not received a dividend, profit from selling their shares, or any other pecuniary ben

efit from their stock ownership, the Moores have not yet re

ceived a return on their original investment in the com

pany. In short, they have not “derived” income from their shares because nothing has come in

. The Government resists this conclusion. It concedes, as it must, that a tax on the “total value of ” the shares “at a particular point [in] time” is a “quintessential tax on prop

erty” that must be apportioned. Tr. of Oral Arg. 127–128;

see NFIB , 567 U. S., at 571; Brushaber , 240 U. S., at 19. But looking at property value across two points in time makes a difference, the Government says, because then the tax targets appreciation rather than the asset’s value. As the Government sees it, Co ngress may tax without appor

tionment “ all economic gains” measured “ ‘between two points in time.’ ” Brief for United States 9, 15. And the in

crease in value between Time A and Time B is “income.” The Government is unable to cite a single decision up

holding an unapportioned tax on appreciation. Tr. of Oral Arg. 89, 91–92. That is no surprise, because our precedent forecloses the Government’s ar gument. We have explained that income includes neither “a gain accruing to capital” nor6 MOORE v. UNITED STATES

B ARRETT , J., concurring in judgment “a growth or increment of value in the investment.” Phellis

, 257 U. S., at 169; see also Safety Car , 297 U. S., at 99 (in

come is the “fruit that is born of capital, not the potency of fruition”). And we have stre ssed that “economic gain is not always taxable as income.” Bruun , 309 U. S., at 469 (em

phasis added); see also Commissioner v. Indianapolis Power & Light Co. , 493 U. S. 203, 214 (1990) (“[A] taxpayer does not realize taxable income from every event that im

proves his economic condition” ). Although appreciation looks valuable on paper, “the stockholder has received noth

ing out of the company’s assets for his separate use and ben

efit,” and market fluctuations could “wip[e] out the entire investment” before the owner ev er receives a dime of “in

come within the meaning of the Sixteenth Amendment.” Eisner v. Macomber , 252 U. S. 189, 211 (1920). If the Government were right that appreciation is income, it is hard to make sense of our decision in Ivan Allen Co

. There, we considered a tax on accumulated earnings— i

. e ., income that the corporation retains as assets on its balance sheet instead of distributing to its shareholders. 422 U. S., at 624–625. Because corporate tax rates were generally lower than individuals’ marginal tax rates, Congress was concerned that corporations wo uld be used to reduce their “shareholders’ overall tax liability by accumulating earn

ings beyond the reasonable needs of the business.” Id., at 624. So Congress imposed a tax on earnings that corpora

tions allowed to accumulate “beyond the reasonable and reasonably anticipated needs of the business.” Id. , at 621, 624. In upholding the tax, we took great care to explain that the tax “is not directed at the unrealized appreciation of liquid assets”; “any unrealized appreciation in the value of the taxpayer’s portfolio . . . does not enter into the com

putation” of the tax. Id ., at 627–628. The tax took into ac

count the value and appreciation of the corporation’s assets “only in measuring reasonableness of accumulation of the earnings and profits that otherwise independently exist.”7 Cite as: 602 U. S. ____ (2024)

B ARRETT , J., concurring in judgment

Id ., at 628. In other words, asset appreciation was only rel

evant with respect to how much of the corporation’s income could be taxed under the statute. More assets meant less income reasonably could be accu mulated. If asset appreci

ation itself were just as tax able as income, there would have been no reason for the Court’s painstaking efforts to explain the scope of the tax. See id ., at 627–629. 2

C In upholding the tax, the Ninth Circuit opined that “[w]hether the taxpayer has realized income does not deter

mine whether a tax is constitutional.” 36 F. 4th 930, 935 (2022). In its view, the “Supreme Court has made clear that realization of income is not a constitutional requirement.” Id. , at 936. The Ninth Circuit misread our cases. Contrary to its assertion, this Court has “never abandoned the core requirement that income must be realized to be taxable without apportionment.” 53 F. 4th 507, 508 (CA9 2022) (Bumatay, J., dissenting from denial of rehearing en banc). What we have done is reject efforts to narrow what it means to realize income. For example, in Helvering v. Bruun —one of the cases on which the Ninth Circuit relied—we clarified that “the real

ization of gain need not be in cash derived from the sale of an asset” but can also “result [from] exchange of property, payment of the taxpayer’s indebtedness, relief from a liabil

ity, or other profit realized from the completion of a trans

action.” 309 U. S., at 469. In that case, a tenant built a valuable building on the landlord’s property. Upon termi

nation of the lease, the landlord regained possession of the

——————

2 Although Ivan Allen Co. involved the interpretation of a tax statute, our analysis sheds light on the Consti tution’s definition of income be

cause we have long interpreted “gross income” in the Internal Revenue Code to reach “ ‘the full measure of [Congress’s] taxing power.’ ” Com

missioner v. Kowalski , 434 U. S. 77, 82 (1977) (quoting Helvering v. Clifford , 309 U. S. 331, 334 (1940)).8 MOORE v. UNITED STATES

B ARRETT , J., concurring in judgment
property—and acquired the building too. When the Inter

nal Revenue Service came calling, the landlord protested that he had realized no taxable gain from the building in the year that the lease ended. We sided with the IRS. Gain from a contributed building is not like an “accrua[l] of value due to extraneous and adventitious circumstances”—for ex

ample, appreciation from a booming real estate market. Id ., at 467. Nor does realization require the ability to “sever the improvement begetting the gain from [the] original cap

ital.” Id ., at 469. “If that were necessary,” we said, “no in

come could arise from the ex change of property; whereas such gain has always been recognized as taxable gain.” Ibid. None of that remotely suggests, however, that reali

zation is not required or (relatedly) that appreciation counts as taxable income. Instead, it explains that profit (there, the building) is realized when received, even if it cannot be physically separated from the capital (there, the land). In dispensing with the realization requirement, the Ninth Circuit also cited Helvering v. Horst . But Horst , like Bruun , emphasizes that realization does not require cash in hand— not that realization is irrelevant. In Horst , “the owner of negotiable bonds . . . detached from them negotia

ble interest coupons shortly before their due date and deliv

ered them as a gift to his son who in the same year collected them at maturity.” 311 U. S., at 114. The bond owner in

sisted that the interest coupons were not income taxable to him , because his son owned them at the time they came due. See id ., at 114–115. We rejected the argument that the bond owner could “escape all tax by giving away his right to income in advance of payment.” Id ., at 116. “The power to dispose of income is the equivalent of ownership of it.” Id ., at 118. And while the donor chose not to take the interest itself, he still “ realized the fruits of his investment.” Id ., at 117 (emphasis added). Realization does not depend on how the user chooses to enjoy the income—whether through “the purchase of goods at the corner grocery, the9 Cite as: 602 U. S. ____ (2024)

B ARRETT , J., concurring in judgment
payment of his debt there, or such non-material satisfac

tions as may result from . . . a gift to his favorite son.” Ibid

. Far from disavowing the realization requirement, the Court emphasized that a taxpayer cannot escape realization (and therefore tax liability) by giving away the fruit of his capi

tal. In sum, realization may take many forms, but our prece

dent uniformly holds that it is required before the Govern

ment may tax financial gain without apportionment. Real

ization is a question of substance, not form. Diedrich , 457 U. S., at 195. In general, realization is “the last step . . . by which [one] obtains the fruition of the economic gain which has already accrued to him.” Horst , 311 U. S., at 115. Our cases describe many ways income might be realized; a rigid definition does not capture them all. See, e

. g ., MacLaughlin

v. Alliance Ins. Co. , 286 U. S. 244, 249 (1932) (“sale or other disposition of property”); Safety Car , 297 U. S., at 93 (“prof

its owing to a patentee by the infringer of a patent”); Kirby Lumber , 284 U. S., at 2–3 (“clear gain” resulting from cor

poration repurchasing bonds it issued for less than the cor

poration had initially “received [for] their par value”). The common thread is that to realize income, one must receive something new and valuable beyond the property she al

ready owns.

II Though the Moores did not realize income as sharehold

ers, KisanKraft realized inco me as a corporation—profits from supplying farm equipment to customers in India. The Government argues that, because the MRT targets KisanKraft’s realized income, it falls within the Sixteenth Amendment and is not subject to the apportionment rule. Brief for United States 42. But the question is not whether

some taxable person or entity has realized income at some point. Rather, as the Court emphasizes, we must determine10 MOORE v. UNITED STATES

B ARRETT , J., concurring in judgment
whether Congress has the power to tax the Moores on in

come that KisanKraft realized. Ante , at 8. Put differently, can Congress disregard KisanKraft’s corporate form, attrib

ute KisanKraft’s income to its shareholders, and tax its shareholders on that income? The Court concludes that it can, describing our case law as “clear and definitive” in the Government’s favor. Ante

, at 13. I read our cases differently. As I understand our precedent, it leaves room fo r Congress to disregard the cor

porate form in some circumstances. But that is not because Congress—as the Court suggests—can treat corporations interchangeably with partnerships, whose partners have always been subject to pass-through taxation on the part

nership’s income. See United States v. Basye , 410 U. S. 441, 453–454 (1973). Rather, our cases allow Congress to disre

gard the corporate form to determine whether the share

holder received income in substance , if not in form.

A Our precedent suggests that Congress’s power to attrib

ute a corporation’s income to its shareholders for tax pur

poses is limited. Eisner v. Macomber is the most recent case addressing this issue—and it was decided more than a cen

tury ago. There, the Stand ard Oil Company of California chose to reinvest its profits back into the corporation rather than distributing them to shareholders. 252 U. S., at 200. Those retained earnings caused an imbalance in the corpo

ration’s capital account. So to adjust its books, Standard Oil declared a stock dividend t hat issued new shares to ex

isting shareholders while diluting the value of their previ

ous shares—which left the shareholders in the same finan

cial position as before the transaction. See id ., at 200–201, 212. The Court held that shareholder Myrtle Macomber did
not realize income from the stock dividend because she “re

ceived nothing out of the company’s assets for [her] sepa

-11 Cite as: 602 U. S. ____ (2024)

B ARRETT , J., concurring in judgment

rate use and benefit.” Id ., at 211. The shareholder’s origi

nal investment “still remains the property of the company, and subject to business risks which may result in wiping out the entire investment.” Ibid . The stock dividends were “evidenc[e]” that her capital previously had appreciated

, but the dividends themselves “added nothing to” her prop

erty and were therefore not income derived from it. Id ., at 212 (while the “shareholder is the richer because of an in

crease of his capital . . . he has not realized or received any income in the transaction”). 3 Importantly for our purposes, the Court also rejected the Government’s theory that Congress could attribute the cor

poration’s income to its shareholders. See id ., at 213. The Court expressed “no doubt of the power or duty of a court to look through the form of the corporation and determine the question of the stockholder’s right, in order to ascertain whether he has received income taxable by Congress with

out apportionment.” Ibid . (emphasis added). But the Court would not “disregard the essent ial truth disclosed”: It would not “ignore the substantial difference between corporation and stockholder” and “treat the entire organization as un

real; look upon stockholders as partners, when they are not such . . . and indulge the fiction that they have received and realized a share of the profits of the company which in truth they have neither received nor realized.” Id. , at 214. The Court therefore refused to uphold the tax as a tax on at

tributed corporate income. That left one potential justification for the tax—that the Direct Tax Clause’s apportionme nt requirement did not ap

ply to taxes on the stockholde r’s undivided interest in the corporation. The Court rejected that argument too, adher

ing to Pollock ’s holding that a tax on a shareholder’s own

ership interest is a tax on property. The Court explained

——————

3 The Court today does not cast doubt on Macomber ’s holding that ap

preciation is not income. See ante , at 23.12 MOORE v. UNITED STATES

B ARRETT , J., concurring in judgment

that Pollock “overruled” the holding of Collector v. Hub

bard , 12 Wall. 1 (1871), that Congress could “tax without apportionment a stockholder’s interest in accumulated earnings prior to dividend declared,” Macomber , 252 U. S., at 218. The Court acknowledged that the Sixteenth Amendment had overruled Pollock ’s holding that a tax on income derived from property must be apportioned. 252 U. S., at 219. But it stressed that the Sixteenth Amend

ment did not otherwise disturb the law concerning the Di

rect Tax Clause—including Pollock ’s holding that the Clause applies to “property, real and personal.” Id. , at 206;

see id ., at 219 (“[T]he Amendment applies to income only”). Because a stockholder’s ownership interest in the corpora

tion is personal property—“ capital, not income”—Congress must apportion any tax on it. Ibid

. Today, the Court does not dispute either that income re

quires realization or that a tax on stock ownership must be apportioned. Instead, it says that the income of a closely held foreign corporation can be attributed to its sharehold

ers for tax purposes. That might be right, but the Court’s reasons for saying so are wrong: It dismisses the “attribu

tion” portion of Macomber as dicta and argues that four sub

sequent cases undercut it. Ante , at 13. I disagree. None of these cases contradicts Macomber ’s admonition that Con

gress cannot “look upon stockholders as partners . . . when they are not”; Congress may not “indulge the fiction that they have received and realized a share of the profits of the company” when they have not. 252 U. S., at 214; see also Helvering v. Griffiths , 318 U. S. 371, 376–377, and n. 11 (1943). Rather, the Court’s cases all illustrate the principle that the validity of an income tax must be assessed “accord

ing to truth and substance, [not] form.” Macomber , 252 U. S., at 206. Burk-Waggoner Oil Assn. v. Hopkins upheld Congress’s power to tax an “unincorporated joint stock association” asCite as: 602 U. S. ____ (2024) 13

B ARRETT , J., concurring in judgment
a corporation even though state law treated it as a partner

ship. 269 U. S. 110, 110–111 (1925). We disregarded the state-law label because the associations acted as corpora

tions: They had “a fixed capital stock divided into shares,” they “manage[d] their affairs by a board of directors and executive officers,” and they “conduct[ed] their business in the general form and mode of procedure of a corporation.” Id ., at 113–114. “[N]othing in the Constitution,” we ex

plained, “precludes Congress from taxing as a corporation an association which, although unincorporated, transacts its business as if it were.” Id ., at 114. Burk-Waggoner thus held that for tax purposes, Congress could treat a partner

ship like a corporation when it acts like a corporation. We did not decide whether Congress may treat a corporation like a partnership

— e

. g ., attributing its income to share

holders—when, in truth and substance, it operates as a cor

poration. Next up is Burnet v. Leininger , 285 U. S. 136 (1932). Alt

hough that case involved a partnership, the issue was about the “anticipatory assignment of income doctrine.” See Com

missioner v. Banks , 543 U. S. 426, 433–434 (2005) (“A tax

payer cannot exclude an economic gain from gross income by assigning the gain in advance to another party” (citing, inter alia

, Lucas v. Earl , 281 U. S. 111, 114–115 (1930)); 1 B. Bittker, J. Eustice, G. Goldstein, & T. Brantley, Federal Income Taxation of Corporations and Shareholders ¶2.07[3] (2024). The taxpayer, who happened to be one-half partner in a laundry business, tried to reduce his tax liabil

ity by assigning a portion of his income to his wife. 285 U. S., at 141. We rejected that artifice and affirmed Con

gress’s ability to “ta[x] the salary and fees of the person who earned them.” Id ., at 141–142 (citing Lucas , 281 U. S., at 114). This case, too, is about classifying taxes according to substance rather than form. The Court also invokes Heiner v. Mellon , which blesses Congress’s power to tax “partn ers” on their “proportionate14 MOORE v. UNITED STATES

B ARRETT , J., concurring in judgment
share of the net income of the partnership” even where the partnership’s income is not “cu rrently distributable” to the partners under state law. 304 U. S. 271, 280–281 (1938). The case rests on the “axiomatic” and “firmly established” rule of partnership taxation that “each partner must pay taxes on his distributive [ i

. e ., proportional] share of the partnership’s income without regard to whether that amount is actually distributed to him.” Basye , 410 U. S., at 453–454 (discussing Heiner ). Given the unique partnership context, Heiner sheds no light on Congress’s power to tax shareholders on a corporation’s income. 4 Finally, in Helvering v. National Grocery Co. , 304 U. S. 282 (1938), the Court sustained a deficiency tax imposed on a corporation that was used to shelter the income of its sole shareholder. (Notably, the corporation, not the share

holder, was the taxpayer.) In the course of rejecting the corporation’s various challenges to the tax, the Court opined that “Kohl, the sole owner of the business, could not by conducting it as a corporat ion, prevent Congress, if it chose to do so, from laying on him individually the tax on the year’s profits.” Id ., at 288. That dictum, if correct, is consistent with Macomber ’s recognition that courts can look through the corporate form to determine the substance of the shareholder’s relationship to the income. Because Na

tional Grocery’s income was real ly just the income of Kohl, its sole owner, the Court suggested that attributing it to him for tax purposes would be permissible.

——————

4 Partnerships are distinct from corp orations in many other fundamen

tal ways. For example, partnerships traditionally do not have a legal identity distinct from the partners and do not enjoy the limited liability characteristic of the corporate form. They are instead “an aggregation of individuals operating the business as co-owners with individual rights and duties.” 1 J. Cox & T. Hazen, Law of Corporations §1.07 (3d ed. 2010). For purposes of federal diversity jurisdiction, partnerships are citizens wherever their partners are, whereas corporations have citizen

ship distinct from th eir shareholders. See Carden v. Arkoma Associates

, 494 U. S. 185, 187–189 (1990).15 Cite as: 602 U. S. ____ (2024)

B ARRETT , J., concurring in judgment
Thus, in matters of corporate form and income attribu

tion—as in the definition of in come—labels do not control. But acknowledging that substanc e controls is a far cry from asserting that Congress is free to wholly disregard the cor

porate form. That would perm it Congress to tax the share

holder without regard to the substance of her relationship to the corporation and would contradict Macomber ’s hold

ing that Standard Oil’s income could not be attributed to its shareholders. See 252 U. S., at 213–214. Our precedent does not give Congress carte bl anche to attribute corporate income to a shareholder. Instead, it suggests that Congress has a limited power to do so that depends on the relation

ship between the shareholder and the income. 5

B Although I believe that the Court today is too quick to bless the attribution of corporate income to shareholders, its holding is narrow. The Court affirms Congress’s power to tax shareholders on “the undistributed income of Ameri

can-controlled foreign corporations,” but it says that the

——————

5 The Court asserts that Congress no longer observes Macomber ’s dis

tinction between sharehol ders and the corporate entity for tax purposes. Ante , at 11. That paints an incomplete picture. After Macomber , Con

gress ended its longstandi ng practice of attributing corporate income to shareholders when the corporation operated as a tax shelter. See Ivan Allen Co. , 422 U. S., at 624–626, and n. 8; Griffiths , 318 U. S., at 377

n. 12, 385. That practice reemerged in the 1930s when Congress began taxing shareholders of closely held foreign corporations on undistributed corporate earnings. Revenue Act of 1937, §201, 50 Stat. 822. To my knowledge, Congress has not returned to that approach for domestic or widely held corporations of the kind Macomber considered. And while Congress continues to attribute income of certain closely held foreign cor

porations to their U. S. shareholders today, see 26 U. S. C. §951 et seq

. (“subpart F”), doing so might be consistent with Macomber ’s recognition that Congress can disregard the corporat e form when, in substance, it is reasonable to treat the income of th e corporation as that of the share

holders. The Court’s “arbitrariness” test seems to get at a similar point, but, by dismissing the relevance of the corporate form altogether, it con

fuses the analysis.16 MOORE v. UNITED STATES

B ARRETT , J., concurring in judgment
Due Process Clause cabins that power by requiring income attributions not to be “arbitrary.” Ante , at 22–23. The ar

bitrariness inquiry, the Court previews, turns on “the tax

payer’s relationship to the underlying income.” Ante

, at 14,

n. 4 (citing Burnet v. Wells , 289 U. S. 670, 678–679 (1933)). I agree that the Constitution prohibits Congress from ar

bitrarily attributing to the taxpayer someone else’s income. Our cases have located that limit in the Due Process Clause. See Burnet , 289 U. S., at 678–679; Hoeper v . Tax Comm’n of Wis. , 284 U. S. 206, 215 (1931) (“That which is not in fact the taxpayer’s income cannot be made such by calling it income”). But an arbitrariness limit is implicit in the Sixteenth Amendment too. Virtually all property was income at some point. Ford Motor Company uses its income to buy steel for making trucks. But surely Congress cannot attribute Ford’s earnings to anyone who owns an F–250. The Amendment’s reference to “derived” income presup

poses that the income belongs to the taxpayer, or is at least fairly attributable to her. Otherwise the taxpayer’s prop

erty ( e.g. , the truck she drives) could be taxed without ap

portionment just because it was once somebody else’s in

come ( e.g. , the earnings Ford used to purchase the steel). While an arbitrariness limit on income attribution surely exists, its contours are uncertain. We have never before ap

plied the arbitrariness test to a tax law that attributes a corporation’s income to its shar eholders. At oral argument, the Government identified a series of factors that the Court has considered in attribution cases involving license agree

ments and trusts. See Tr. of Oral Arg. 119–123. One is whether the taxpayer has “sufficient power and control over . . . the income” that it is “reasonable to treat him as the recipient of the income for tax purposes.” Commissioner v. Sunnen , 333 U. S. 591, 604 (1948). Another is whether the taxpayer receives a special “p rivilege or benefit” from the entity that earns the income. Burnet , 289 U. S., at 679. A third is whether the corporation is foreign and thus outside17 Cite as: 602 U. S. ____ (2024)

B ARRETT , J., concurring in judgment
the reach of an accumulated earnings tax. Cf. Ivan Allen Co. , 422 U. S., at 624. These factors may serve as a useful guide for lower courts when a pplying today’s decision to taxes that attribute income from other types of corporations to an individual taxpayer. Just because Congress can at

tribute income of a closely held foreign corporation like KisanKraft to its shareholders does not mean it has equal power to attribute the income of a publicly traded domestic corporation to anyone holding a few shares in her retire

ment account.

C Congress’s power to attribute the income of closely held corporations to their shareholders is a difficult question— and unfortunately, the parties barely addressed it. Without focused briefing on the attribution question, I would not re

solve it. Subpart F and the MRT may or may not be consti

tutional, nonarbitrary attributions of closely held foreign corporations’ income to their shareholders. In this litiga

tion, however, the Moores have conceded that subpart F is constitutional. Tr. of Oral Arg. 9. And I agree with the Court that subpart F is not meaningfully different from the MRT in how it attributes corporate income to shareholders. Ante , at 20–21. Taxpayers generally bear the burden to show they are entitled to a refund. United States v. Janis

, 428 U. S. 433, 440 (1976); see also Haaland v. Brackeen , 599 U. S. 255, 277–278 (2023) (burden to show unconstitution

ality). Given the Moores’ concession, they have not met that burden here. For that reason, I concur in the Court’s judg

ment affirming the judgment below._________________

_________________ 1 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting 

## SUPREME COURT OF THE UNITED STATES

No. 22–800

CHARLES G. MOORE, ET UX ., PETITIONERS

v. UNITED STATES

ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE NINTH CIRCUIT
[June 20, 2024]

J USTICE T HOMAS , with whom J USTICE G ORSUCH joins, dissenting. Charles and Kathleen Moore paid $14,729 in taxes on an investment that never yielded them a penny. They chal

lenge that tax—the Mandatory Repatriation Tax (MRT)— as unconstitutional. As relevant, they argue that a tax on unrealized investment gains is not a tax on “incomes” within the meaning of the Sixteenth Amendment, and it therefore cannot be imposed “without apportionment among the several States.” The Moores are correct. Sixteenth Amendment “incomes” include only income realized by the taxpayer. The text and history of the Amendment make clear that it requires a dis

tinction between “income” and the “source” from which that income is “derived.” And, the only way to draw such a dis

tinction is with a realization requirement. Our precedent says as much. In Eisner v. Macomber , 252 U. S. 189 (1920), the Court explained that “the characteristic and distin

guishing attribute of income,” as the term is used in the Sixteenth Amendment, is that it is “ received or drawn by the recipient (the taxpayer) for his separate use, benefit and disposal.” Id. , at 207. Because the Moores never actually received any of their investment gains, those unrealized gains could not be taxed as “income” under the Sixteenth Amendment.2 MOORE v. UNITED STATES

T HOMAS , J., dissenting
The Ninth Circuit wrongly rejected the Moores’ challenge on the ground that “realization of income is not a constitu

tional requirement.” 36 F. 4th 930, 936 (2022). That con

clusion cannot be reconciled with the Sixteenth Amend

ment as the Court correctly interpreted it in Macomber . We therefore granted certiorari to answer the question “[w]hether the Sixteenth Amendment authorizes Congress to tax unrealized sums without apportionment among the states,” i

. e ., as “incomes.” Pet. for Cert. i. Today, the Court upholds the MRT only by ignoring the question presented. It does “not address the Government’s argument that a gain need not be realized to constitute in

come under the Constitution.” Ante , at 12–13, n. 3. In

stead, the Court answers the question “whether Congress may attribute an entity’s realized and undistributed income to the entity’s shareholders or partners, and then tax the shareholders or partners on their portions of that income.” Ante , at 8. After changing the subject, the majority upholds the MRT by relying on unrelated precedent to derive a “clear rule” that “Congress can attribute the undistributed income of an entity to the entity’s shareholders or part

ners.” Ante , at 10–11. I respectfully dissent. The Ninth Circuit erred by con

cluding that realization is no t a constitutional requirement for income taxes. And, the majority’s “attribution” doctrine is an unsupported invention.

I The Sixteenth Amendment provides: “The Congress shall have power to lay and collect taxes on incomes, from what

ever source derived, withou t apportionment among the sev

eral States, and without regard to any census or enumera

tion.” The central dispute in this case—at least, in the case briefed by the parties—concerns the meaning of the word “incomes” in the Amendment. The Moores define “income” as “ ‘a gain, a profit, [or] something of exchangeable value’3 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
[that] is ‘ received or drawn by the recipient (the taxpayer) for his separate use, benefit and disposal.’ ” Brief for Peti

tioners 1 (quoting Macomber , 252 U. S., at 207). This idea—that “income” is only so mething actually available for the taxpayer’s use—is known as “realization.” The Govern

ment rejects the realization requirement, arguing instead that “income” captures “all ec onomic gains” whether or not they are actually realized. Brief for United States 14 (in

ternal quotation marks omitted). “Income” in the Sixteenth Amendment refers only to in

come realized by the taxpayer. The Amendment resolved a long-running conflict over the scope of the Federal Govern

ment’s taxing power. It pave d the way for a federal income tax by creating a new constitutional distinction between “income” and the “source” from which that income is “de

rived.” Drawing that distinction necessitates a realization requirement.

A
To understand the text of the Sixteenth Amendment— and, in particular, the meaning of the word “income”—one must first understand how the Amendment came about. The Constitution’s original taxing provisions divided taxes into two classes: direct and indi rect taxes. And, as part of a delicate constitutional compromise, the original taxing provisions required direct taxe s to be apportioned among the States based on population. Disputes about the scope of the direct-tax category came to a head in Pollock v. Farm

ers’ Loan & Trust Co. , 158 U. S. 601 (1895), when this Court held that many income taxes were direct taxes subject to the apportionment requirement. In reaching this conclu

sion, the Court held that income could not be distinguished from its source for purposes of classifying an income tax as direct or indirect. The Sixteenth Amendment was ratified to overrule that holding from Pollock , and it can therefore4 MOORE v. UNITED STATES

T HOMAS , J., dissenting
be understood only in the context of Pollock and the preced

ing history.

1 The Sixteenth Amendment modified the Constitution’s original regulations of Congress’s taxing power. The text of those provisions is therefore the natural starting point for interpreting the Sixteenth Amendment. The Taxing Clause provides Congress with broad aut hority to impose taxes. Other Clauses, including the Direct Tax Clause, classify dif

ferent kinds of taxes and set corresponding limitations on Congress’s power to impose them. The Sixteenth Amend

ment alters those rules by making clear that taxes on in

come are not subject to the limitations imposed on direct
taxes. The Constitution gives Co ngress the power to impose “Taxes” of any kind, including income taxes. The Taxing Clause provides that “Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States; but all Duties, Imposts and Excises shall be uniform throughout the United States.” Art. I, §8, cl. 1. This Clause is the sole source of Congress’s authority to impose taxes. And, that authority is broad. Nothing in the Constitution limits the kinds of taxes that Congress may impose. As the Court has explained, “the authority conferred upon Congress by” the Taxing Clause “is exhaus

tive and embraces every concei vable power of taxation.” Brushaber v. Union Pacific R. Co. , 240 U. S. 1, 12 (1916). But, the Constitution restricts the manner in which Con

gress may impose taxes. It accomplishes this by dividing taxes into two classes—direct and indirect taxes—and im

posing a distinct limitation applicable to each of those clas

ses. 1

——————

1 The General Welfare Clause—quoted al ongside the rest of the Taxing5 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting

Start with the class of direct taxes. The Direct Tax Clause provides: “No Capitation, or other direct, Tax shall be laid, unless in Proportion to the Census or Enumeration herein before directed to be taken.” Art. I, §9, cl. 4. The Constitution does not expressly identify any tax as direct other than a “Capitation.” A “capitation”—also called a “poll tax”—is “[a] fixed tax levied on each person within a jurisdiction.” Black’s Law Dictionary 1760 (11th ed. 2019) (defining “tax”). At the founding, the class of direct taxes was also understood to include taxes on real property, and perhaps taxes on personal property. See infra , at 14–15. Indirect taxes, on the other hand, include “Duties, Im

posts and Excises.” Art. I, §8, cl. 1. These were taxes that people could avoid by adjusting their behavior—generally, taxes on articles of consumption. See The Federalist No. 21, p. 116 (E. Scott ed. 1898) (A. Hamilton). “Indirect taxes” are not identified by that name in the Constitution. But, the Constitution’s delinea tion of a direct-tax category signals the existence of a complementary indirect-tax cate

gory. For each class of taxes, the Constitution limits Congress’s power with a distinct rule. Di rect taxes are subject to the rule of apportionment. The Constitution twice specifies that “direct Taxes shall be apportioned among the several States . . . according to their respective Numbers.” 2 Art. I, §2, cl. 3; see also §9, cl. 4. A tax is apportioned among the States if “each State pays in proportion to its population.” National Federation of Independent Business v. Sebelius

,

—————— Clause above—is also an important “qualification on the substantive tax

ing power.” Health and Hospital Corporation of Marion Cty. v. Talevski

, 599 U. S. 166, 206 (2023) (T HOMAS , J., dissenting). But, because this case does not implicate that limitation, I do not further explore the General Welfare Clause.

2 Those “Numbers,” were originally “d etermined by adding to the whole Number of free Persons . . . three fifths of all other Persons.” Art. I, §2, cl. 3; but see Amdt. 14, §2.6 MOORE v. UNITED STATES

T HOMAS , J., dissenting
567 U. S. 519, 570 (2012). An example best demonstrates what apportionment requires. Suppose that Congress im

posed a direct tax on houses, and apportioned the tax such that two States of equal population were both responsible for paying $100 in taxes. If the first State contained 100 houses and the second State only 10, houses in the first State would be taxed at $1 each ($100 divided by 100 houses), whereas houses in the second State would be taxed at $10 each ($100 divided by 10 houses). Indirect taxes are subject to the rule of uniformity: “[A]ll Duties, Imposts and Excises shall be uniform throughout the United States.” Art. I, §8, cl. 1. The Court has ex

plained that “the words ‘unifo rm throughout the United States’ . . . signify . . . a geographical uniformity.” Knowlton

v. Moore , 178 U. S. 41, 106 (1900). In other words, a “tax is uniform when it operates with the same force and effect in every place where the subject of it is found.” Head Money Cases , 112 U. S. 580, 594 (1884). So, a duty on the impor

tation of tea must impose the same rate on imports coming through Boston as those coming through Savannah. 3 The Sixteenth Amendment, on its face, narrows the scope of the apportionment requirement. While direct taxes must be apportioned, the Sixteenth Amendment allows Congress

——————

3 For the sake of completeness, three remaining taxing provisions in the Constitution of 1789 bear mentioning. First, “a Tax or duty may be imposed” on the “Importation of such Persons as any of the States now existing shall think proper to admit”— i.e. , upon the foreign slave trade— “not exceeding ten dollars for each Person .” Art. I, §9, cl. 1. Second, “[n]o Tax or Duty shall be laid on Articles exported from any State.” Cl. 5. And third, “[n]o State sh all, without the Consent of the Congress, lay any Imposts or Duties on Imports or Exports” (with limited exceptions). §10, cl. 2. Together, these provisions de fine the limits of state and federal taxing power with respect to foreig n and interstate commerce. I mention them below only in passing. But, like the division between direct and indirect taxes, these provisions refl ect the delicate balance that the Con

stitution struck regarding the scope of the federal taxing power.7 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
to tax incomes “without apportion ment.” But, it did not re

move the Direct Tax Clause or the apportionment require

ment from the Constitution entirely. To appreciate the ex

tent of the change, and its implications for the meaning of the word “incomes,” it is necessary to examine the origins of the Direct Tax Clause and how disputes about the Clause’s scope led to the Sixteenth Amendment.

2 The Direct Tax Clause was a critical aspect of the balance between state and federal power in the original design of the Constitution. It is easy to day to take the federal taxing power for granted. But, at the founding, allowing the Na

tional Government to exercise such a power was a radical proposal. The importance of the limitations imposed by the Direct Tax Clause to the compro mise struck by the Consti

tution has significant implications for the meaning of “in

comes” in the Sixteenth Amendment. The American colonial experience inspired widespread distrust of taxation. See, e

. g ., Declaration of Independence ¶19. The Articles of Confederation reflected that distrust. Under the Articles, the entire taxing power was exclusive to the States. The National Government had no power to impose taxes of any kind. The only revenue for the National Government was funds “supplied by the several States” pursuant to requisitions “in proportion to the value of all land within each State.” Articles of Confederation, Art. 8. And, the taxes for paying th ose requisitions were imposed solely by the States themselves. The requisition system showed immediate signs of inad

equacy. Raising funds through requisitions was often inef

fective because States felt li ttle urgency to pay their obliga

tions. See Federalist No. 30, at 160 (A. Hamilton) (explaining that requisitions were formally “obligatory upon the States,” but that “in practice” the right to disre

gard them was “constantly exercised”). And, the financial8 MOORE v. UNITED STATES

T HOMAS , J., dissenting
strain placed on the National Government by the Revolu

tionary War made that ineffici ency an existential threat to the fledgling Nation. The Continental Congress quickly concluded that financ

ing the war effort would require another source of revenue for the National Government. “[T]o establish the national credit,” the Congress’s finance Committee reported in De

cember 1780, “it will be necessary ” for the States to “vest[t] in Congress” “[t]he exclusive right to duties arising on cer

tain imported articles.” 18 Journals of the Continental Con

gress 1774–1789, p. 1157 (G. Hunt ed. 1910). The Congress therefore proposed the Impost of 1781, “recommend[ing] to the several states, as indispensably necessary, that they . . . vest a power in Congress, to levy for the use of the United States, a duty of five per cent.” on most imports. 19 Jour

nals of the Continental Congress 112 (1912) (footnote omit

ted). The President of the Continental Congress transmit

ted the proposal to the States on February 8, 1781, under a cover letter stressing the “precarious Manner” in which Congress had to fund the Army under the requisition sys

tem. 5 Letters of Members of the Continental Congress 564 (E. Burnett ed. 1931). Every State but Rhode Island approved the Impost of 1781. See 1 Documentary History of the Ratification of the Constitution 63 (M. Jensen ed. 1976) (Documentary His

tory). But, because the Arti cles of Confederation required amendments like the impost to be approved unanimously, Rhode Island’s refusal defeated the amendment. Articles of Confederation, Art. 13; see also 23 Journals of the Conti

nental Congress 783–784 (1914). In a letter to the Confed

eration Congress, 4 the Rhode Island Legislature explained that it rejected the impost “[b]ecause it would be unequal in

——————

4 After the ratification of the Articles of Confederation in March 1781, the Continental Congress became th e Confederation Congress. See 1 Documentary History 136.9 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
its operation, bearing hardest on the most commercial states,” including Rhode Island. Id ., at 788. One State’s jealousy of its lucrative tax bas e prevented the reform of the Articles’ flawed requisition system. A year later, the Confederation Congress again proposed a national taxing power with the Impost of 1783. The pro

posal languished for years, and then failed after New York refused its consent in February 1787. See 1 Documentary History 190, n. 3. As the second impost awaited its slow death, the Confederation Congress issued a dire warning about the financial condition of the National Government in February 1786. See 30 Journals of the Continental Con

gress 70, 75 (J. Fitzpatrick ed. 1934). Faced with mounting threats to the security of the country, and requisitions that had become “so irregular in thei r operation” as to be “dan

gerous to the welfare and peace of the Union,” Congress as

serted “that the crisis has arrived” when the people of the United States must decide whether, “for want of a timely exertion in establishing a general revenue,” they will risk both the existence of the Union and the liberty that they won in the Revolution. Id ., at 72, 75. The practical impossibility of reforming the Articles to in

clude a national taxing power was among the primary rea

sons for the Constitutional Convention of 1787. John Ad

ams later reflected as Vice President: “The opposition of Rhode Island to the impost seems to have been the instru

ment which providence thought fit to use for the great pur

pose of establishing the present constitution.” 26 Documen

tary History 743 (J. Kaminski et al. eds. 2013). In February 1787, the Continental Congress endorsed the call for a con

vention of delegates in Philadelphia. See 32 Journals of the Continental Congress 74 (R. Hill ed. 1936). Virginia had been the first State to answer that call, and in appointing delegates, made prominent reference to the Confederation Congress’s “alarming representations” about the poor state10 MOORE v. UNITED STATES

T HOMAS , J., dissenting
of public finance. 1 Documentary History 196–198 (discuss

ing Congress’s warning of February 1786). The Virginia delegation likewise emphasized the “inefficiency of requisi

tions” when it opened the proceedings at the Convention. 1 Records of the Federal Convention of 1787, pp. 18–19 (M. Farrand ed. 1911) (Farrand’s Records). The possibility of a federal taxing power was highly con

troversial at the Constitutional Convention, despite wide

spread acknowledgment of the need to reform public fi

nance. The Virginia plan—a broad outline that was selected as the basis for the new Government—did not go so far as to include a federal taxing power. The Virginia delegation apparently consider ed it less controversial to open the Convention with a proposal that gave the Federal Government the ability to enforce requisitions against the States by military force. Id., at 21. The New Jersey plan, by contrast, did include federal taxing powers. Id ., at 243. Reason prevailed, and the Convention judged it more pru

dent to risk a federal taxing power than the extraction of federal revenue by the use of military force against the States. See id ., at 54 (“[Madison] observed that the more he reflected on the use of force [against delinquent States], the more he doubted the practicability, the justice and the efficacy of it”). The Convention proposed the Constitution with its taxing provisions as described above; they would be ratified unchanged. See 2 id., at 590, 594, 596; supra, at 4– 6. Unsurprisingly, the proposed creation of a federal taxing power provoked many of the most passionate criticisms by opponents of ratification. The Antifederalists warned that a federal taxing power woul d destroy the state govern

ments. Brutus wrote that the central question presented by ratification was “whether the thirteen United States should be reduced to one great republic . . . or whether they should continue thirteen confederated republics.” Brutus No. 1 (Oct. 18, 1787), in 2 The Complete Anti-Federalist 36411 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
(H. Storing ed. 1981). In support of his dramatic thesis, Brutus asserted that “the indivi dual states must very soon be annihilated,” in part by the federal taxing power. Id ., at 365. The destructive force of the federal taxing power, as Bru

tus explained it, arose from the fact that it forced the States to compete with the Federal Government for a tax base. Be

cause the Constitution prevented the States from emitting paper money and laying duties or imposts, “[t]he only mean therefore left, for any State to support its government and discharge its debts, is by direct taxation.” Id ., at 366. But, even the ability to resort to dire ct taxes would be fruitless, because the power of direct ta xation was shared with the Federal Government. Ibid . Brutus thus argued that once the Federal Government “begins to exercise the right of tax

ation in all its parts, the legislatures of the several states will find it impossible to raise monies to support their gov

ernments” and then “dwindle away.” Ibid. Other Antifed

eralists sounded the same theme at the state ratifying con

ventions. See, e

. g ., 3 Debates on the Constitution 29 (J. Elliot ed. 1836) (Elliot’s Debates) (George Mason arguing in Virginia that the “two concurrent powers” of the State and Federal Governments to impo se taxes directly upon the people “cannot exist long together”). The Federalists’ defense of the new national taxing power stressed that the Federal Gove rnment would impose direct taxes only sparingly, as needed to supplement the revenue from imposts in emergencies. Madison explained that “[w]hen . . . direct taxes are no t necessary, they will not be recurred to. It can be of little advantage to those in power to raise money in a manner oppressive to the people.” Id

., at 95. And, Federalists highlig hted the protection provided by the rule of apportionment. Hamilton explained that di

rect taxes “never can oppress a particular state by an une

qual imposition; because the Constitution has provided a12 MOORE v. UNITED STATES

T HOMAS , J., dissenting
fixed ratio, a uniform rule, by which this must be regu

lated.” 2 id ., at 365. Madison argued that because repre

sentation and direct taxation we re apportioned by the same formula, unjust taxes could not feasibly be imposed; those responsible for paying direct taxes are correspondingly able to defeat their imposition. See 3 id ., at 256–257. 5 With the Constitution’s ratification, the requisition sys

tem was replaced by a system that gave the Federal Gov

ernment the taxing power it had lacked under the Articles of Confederation. That increase in power came at the ex

pense of the States. The States gave up the power to tax interstate and foreign commerce, which was expected to be the main source of federal revenue. They did retain the power of direct taxation, but had to share it with the Fed

eral Government—an arrangement that motivated signifi

cant opposition to the new Constitution. The limitations on the Federal Government’s abilit y to exercise that concur

rent power were thus an essential component of the consti

tutional compromise.

3 Postratification disagreement about what qualified as a “direct tax” would eventually le ad to the adoption of the Six

teenth Amendment. Even though the distinction between direct and indirect taxes was an important component of

——————

5 Several state ratifying conventi ons proposed amendments to strengthen the protection provided by the Direct Tax Clause. For exam

ple, the Massachusetts ratifying conv ention proposed that the Constitu

tion be modified to allow direct taxe s only “when the moneys arising from the impost and excise are insufficient for the public exigencies,” and even then only after Congress first attemp ted to obtain such funds through requisitions. 1 Elliot’s Debates 322– 323. The ratifyin g conventions of South Carolina, New Hampshire, New York, and Rhode Island concurred in the proposed amendment. Id. , at 325, 326, 329, 336. Although those proposals never became part of the Constitution, they demonstrate the importance that many ratifying Stat es placed upon limitations to Con

gress’s power to lay direct taxes.13 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
the founding compromise, it was not entirely clear how to distinguish between the two classes of taxes. The scope of the “direct tax” category proved immediately controversial. And, that controversy eventually came to bear on the ques

tion of income taxation, with the Court initially concluding that the Direct Tax Clause was not a barrier to taxing in

comes. As the Constitution’s text made clear, a “Capitation” was “direct.” Art. I, §9, cl. 3. And, all agreed that taxes on land and slaves were considered di rect. See 3 Elliot’s Debates 229. But, beyond that, the precise boundary between direct and indirect taxes was debatable. An exchange at the Con

stitutional Convention preserved in Madison’s notes is of

ten cited on the subject: “Mr King asked what was the pre

cise meaning of direct taxation? No one answd.” 2 Farrand’s Records 350. This Court grappled with the question in a significant case decided soon after ratification. In 1794, the Third Con

gress passed “An Act laying duties upon Carriages for the conveyance of Persons.” Act of June 5, 1794, ch. 45, 1 Stat. 373. The tax was not apportioned among the States. Some opposed the tax on the theory that a tax on personal prop

erty, such as carriages, was a direct tax that required ap

portionment. 6 When Daniel Hylton failed to pay the tax on his 125 car

riages, the United States brought a suit against him, and the case soon found its way to the Supreme Court. Hylton

v. United States , 3 Dall. 171, 171–172 (1796) ( Hylton’s Case ). “The argument turned entirely upon . . . whether the tax . . . was a direct tax.” Id ., at 172. The four Justices who

——————

6 James Madison, for example, despaired about the unconstitutionality of the tax in a letter to Thomas Jefferson. See 15 Papers of James Mad

ison 327 (T. Mason, R. Rutland, & J. Sisson eds. 1985) (“And the tax on carriages succeeded in spite of the Cons titution . . . . By breaking down the barriers of the constitution . . . wealth may find a precarious defence in the shield of justice”).14 MOORE v. UNITED STATES

T HOMAS , J., dissenting
sat for the case each agreed that the tax was constitutional, and the three who offered reasons suggested that “direct” taxes were limited to capitation and land taxes. But, they did so with some caution. Justice Chase was “inclined to think, but [did] not give a judicial opinion, that the direct taxes contemplated by the Constitution, are only two , to wit, a capitation, or poll tax, simply , without regard to property , profession , or any other circumstance ; and a tax on LAND .” Id ., at 175. He “doubt[ed] whether a tax, by a general assessment of per

sonal property, . . . is included within the term direct tax.” Ibid . Justice Paterson observed that “[w]hether direct taxes, in the sense of the Constitution, comprehend any other tax than a capitation tax, and tax on land, is a ques

tionable point.” Id ., at 177. Justice Iredell opined that “[p]erhaps a direct tax in the sense of the Constitution, can mean nothing but a tax on something inseparably annexed to the soil . . . . A land or poll tax may be considered of this description.” Id ., at 183. Additional disputes over w hat constituted direct taxation arose when the Government re sorted to new forms of taxa

tion to finance the Civil War. In several cases decided shortly after the war, the Court relied on Hylton’s Case to conclude that new taxes were in direct. First, the Court rea

soned that “[i]f a tax upon carriages, kept for his own use by the owner, [was] not a direct tax,” then “a tax upon the business of an insurance company” was not a direct tax. Pa

cific Ins. Co. v. Soule , 7 Wall. 433, 446 (1869). Next, the Court concluded that a tax on the circulation of bank notes was also indirect, but it surveyed ratification-era sources to hint at a slightly more expansive definition of direct taxes. Veazie Bank v. Fenno , 8 Wall. 533, 544 (1869) (“direct taxes were such as may be levied by capitation, and on lands and appurtenances; or, perhaps, by valuation and assessment of personal property upon general lists”). Finally, the Court concluded that a tax on the devolution of title to real estate15 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
was indirect, acknowledging t hat “it never ha[d] been de

cided” whether any taxes besides “[t]axes on lands . . . and capitation taxes” were “direct taxes.” Scholey v. Rew, 23 Wall. 331, 347 (1875). The Civil War also prompted Congress to enact the Na

tion’s first-ever federal income tax. In 1861, Congress im

posed a tax of three percent “upon the annual income of every person residing in the United States, whether such income is derived from any ki nd of property, or from any profession, . . . or from any ot her source whatever,” to the extent that income exceeded $800. §49, 12 Stat. 309. Over the course of the Civil War, the income tax was paid by as many as 1 in 10 Union households and accounted for about a fifth of federal revenues. S. Weisman, The Great Tax Wars 101–102 (2002) (Weisman). The tax remained in force, with modifications, until it expired in 1871. §6, 16 Stat. 257. The Court did not consider the constitutionality of the Civil War income tax until a decade after its expiration, in Springer v. United States , 102 U. S. 586 (1881). The “main question” was whether the tax was an unapportioned direct tax that violated the Direct Tax Clause. Id ., at 595. The Court held that the income tax was not a direct tax. Relying heavily on Hylton’s Case , the Court reasoned “that direct
taxes , within the meaning of the Constitution, are only cap

itation taxes . . . and taxes on real estate.” 102 U. S., at 602. Accordingly, the income tax at issue was “within the cate

gory of an excise or duty.” Ibid

. 7

——————

7 In the case before us, the Government relies heavily on another case involving the Civil War income tax, Collector v. Hubbard , 12 Wall. 1 (1871). According to the Government, Hubbard “upheld [Congress’s] power to” impose “taxes on undistrib uted corporate earnings” as “income taxes,” a result that subsequent decisions “temporarily undermined” un

til “the Sixteenth Amendment . . . reinst at[ed]” it. Brief for United States 9. But, Hubbard is of virtually no relevance to the Sixteenth Amend

ment. Contrary to the Government ’s assertions, the taxpayer in Hub

-16 MOORE v. UNITED STATES

T HOMAS , J., dissenting
In summary, after disputes over the scope of the Direct Tax Clause between the founding and the expiration of the Civil War income tax, the Court apparently concluded that direct taxes were limited to poll taxes and taxes on land. Ibid . But, the Court expressed so me doubt as to the proper classification of taxes “levied by . . . valuation and assess

ment of personal property.” Veazie Bank , 8 Wall., at 544. Based on that narrow reading of the Direct Tax Clause, the Court upheld the Civil War income tax against a constitu

tional challenge. But, the long-running skirmishes about direct taxation would soon come to a dramatic climax fol

lowing the imposition of the first federal income tax in peacetime.

4 I next consider the single mo st important piece of context for understanding the Sixteenth Amendment: Pollock v. Farmers’ Loan & Trust Co. , 158 U. S. 601, the case that the Amendment overruled. In Pollock , the Court concluded, for the first time, that a tax was direct, not apportioned, and therefore unconstitutional. The Court’s reasoning turned on the premise that the Constitution permits no distinction between taxing income and taxing the source from which that income is derived. The holding of Pollock thus meant that most income taxes would have to be apportioned, a re

quirement that made them politically unpalatable. See su

pra , at 6 (describing possible state-by-state variations in rates for apportioned taxes). Because the Sixteenth

—————— bard made a statutory argument about the meaning of the word “enti

tled,” not any argument about the sc ope of Congress’s power. See Brief for Respondent in Collector v. Hubbard , O. T. 1870, No. 122, p. 4. Nor did Hubbard uphold the tax as an income ta x. Instead, it interpreted the statute as a tax on a shareholder’s property rights in undistributed prof

its. 12 Wall., at 18. Because the taxpayer did not bring a constitutional challenge based on the Direct Tax Cl ause, the Court had no occasion to consider the potential implications of treating the tax as a property tax.17 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting

Amendment overruled the result in Pollock , an accurate un

derstanding of the case is essential to understanding the Amendment. Congress imposed the Nation’s first peacetime income tax as part of the Revenue Act of 1894. The Act paired a new tax on the incomes of the wealthiest two percent of Ameri

cans with tariff cuts that wo uld benefit less wealthy con

sumers. See Weisman 132–133, 145. The income-tax com

ponent of the Act provided: “That [from 1895 until 1900] there shall be assessed, levied, collected, and paid annually upon the gains, profits, and income received in the preceding calendar year by [citizens and resident aliens], whether said gains, profits, or income be derived from any kind of property, rents, interest, dividends, or salaries, or from any profession, trade, employment, or vocation . . . , or from any other source whatever, a tax of two per cen

tum on the amount so derived over and above four thousand dollars.” §27, 28 Stat. 553.
The income tax was not apportioned among the States by population. In Pollock v. Farmers’ Loan & Trust Co. , 157 U. S. 429 (1895), the Court considered whether the 1894 income tax was a direct tax that failed to satisfy the Direct Tax Clause’s apportionment requirement. The taxpayer argued that portions of the tax were direct because “imposing a tax on the income or rents of real estate, imposes a tax upon the real estate itself.” Id ., at 555. And, taking the position that taxes on personal property ar e also direct taxes, the tax

payer argued that “imposing a tax on the . . . income of bonds or other personal property . . . imposes a tax on the personal estate itself.” Ibid

. The Court endeavored to determine what “were recog

nized as direct taxes” “at th e time the Constitution was framed and adopted.” Id ., at 558. The Court considered18 MOORE v. UNITED STATES

T HOMAS , J., dissenting
historical context, the records of the Constitutional Conven

tion, the Federalist Papers, other documents from the rati

fication debates, the 1794 carriage tax, and Hylton’s Case

. 157 U. S., at 558–568, 570–572. The Court concluded that “all taxes on real estate or personal property or the rents or income thereof were regarded as direct taxes” at the time the Constitution was ratified. Id ., at 573–574. After reach

ing a conclusion about the original meaning of the Consti

tution, the Court surveyed its precedents and observed that “in none of them is it determined that taxes on rents or in

come derived from land are not taxes on land,” and that “none . . . discussed the question whether a tax on the in

come from personalty is equiva lent to a tax on that person

alty.” Id ., at 579. The Court had some difficulty explaining Springer , which stated that direct taxes are limited to cap

itation and land taxes and concluded that a tax on income was an indirect tax. See supra , at 15. But, the Court re

turned to “[t]he original record” in Springer to review the sources of the taxpayer’s income, and it distinguished the case on that ground. 157 U. S., at 578–579. In the end, the Court concluded that income could not be distinguished from the source from which it was derived for purposes of determining whether a tax on that income would be direct or indirect. It was “unable to perceive any ground” “upon which to rest the contention that real estate belongs to one of the two great classes of taxes,” i

. e ., the directtax class, “and the rent or income which is the incident of its ownership belongs to the other,” i

. e ., the indirect-tax class. Id ., at 581. It grounded that conclusion in the fact that the Direct Tax Clause was a federalism provision at the heart of the constitutional compromise: “If, by calling a tax indirect when it is essentially direct, the rule of protec

tion could be frittered away, one of the great landmarks de

fining the boundary between the Nation and the States of which it is composed, would have disappeared, and with it one of the bulwarks of private rights and priv ate property.”19 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting

Id. , at 583. The Court held that the Act was unconstitutional in part, “so far as it levies a tax on the rents or income of real es

tate.” Ibid . But, the Justices divided evenly on the question whether the tax was unconstitutional “as to the income from personal property.” Id ., at 586. The case was there

fore scheduled for rehearing. After rehearing, the Court extended its logic and held that a tax on income derived from personal property—like a tax on income derived from real property—was a direct tax. 158 U. S., at 625. The Court offered a more thorough explanation for why income could not be distinguished from its source when classifying a tax

. It began by observing that the distinction between direct and indirect taxes was criti

cal to our system of federalism. By ratifying the Constitu

tion, the States “gave up the great sources of revenue de

rived from commerce” and “reta ined the power of direct taxation,” but only concurrently with the Federal Govern

ment. Id ., at 620. Limitations on federal direct taxation offered state governments a fiscal safe haven against ex

panding federal authority, in recognition of the fact “that the power to tax involved the power to destroy.” Id ., at 621. “[T]he qualified grant” of an apportioned direct-taxation power built security into the “structure of the government itself . . . by providing that direct taxation and representa

tion in the lower house of Congress should be adjusted on the same measure.” Id ., at 621–622. The Court relied on those fede ralism principles to reject the argument “that income is taxable irrespective of the source from whence it is derived.” Id. , at 629. It explained that the Constitution—read “in its plain and obvious sense” and in the context of “the circumstances attending the for

mation of the government”—could not be understood to treat income “as belonging to a totally different class” of taxation than the class “which includes the property from20 MOORE v. UNITED STATES

T HOMAS , J., dissenting
whence the income proceeds.” Id ., at 627–628. Such an in

terpretation would leave the Direct Tax Clause “utterly il

lusory and futile, and the object of its framers defeated.” Id ., at 628. The Court refused to allow the effect of the Di

rect Tax Clause to be “refined away by forced distinctions between” income and source. Ibid

. 5 The Sixteenth Amendment was designed to overrule Pol

lock ’s obstacle to an income tax, and it was understood by the public in those terms. Pollock stood in some tension with the Civil War tax cases, and it was not well received. Critics likened it to Dred Scott v. Sandford , 19 How. 393 (1857), and the decision became a major issue in the 1896 Presidential election. Weisman 148. By the 1908 Presiden

tial election, both major political parties supported finding

a way, Pollock notwithstanding, to impose an income tax. See E. Seligman, The Income Tax 591–592 (2d ed. 1914).In 1909, President Taft pledged his support for an incometax amendment. In a widely published message to Con

gress, he explained that “[t] he decision of the Supreme Court” in Pollock “deprived the national government of a power which” it “ought to have.” Taft Asks for Tax, Wash

ington Post, June 17, 1909, p. 4. Taft therefore asked Con

gress to “propose an amendment to the Constitution confer

ring the power to levy an income tax upon the national government without apportionment.” Ibid

. Shortly after the President delivered his message, Sena

tor Norris Brown of Nebraska proposed an income-tax amendment providing: “The Congress shall have power to lay and collect direct taxes on incomes without apportion

ment among the several States according to population.” 44 Cong. Rec. 3377 (1909). The proposed amendment’s narrow focus on an income tax was significant. After all, a consti

tutional amendment could have easily eliminated Pollock ’s obstacle to income taxation by removing the Constitution’s21 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
direct-tax provisions wholesale. 8 A few weeks later, the proposed amendment emerged from Committee in its modern form. It is not clear how the original proposal’s reference to “direct taxes” was removed, or how the phrase “from whatever source derived” was added. See E. Jensen, The Taxing Power, the Sixteenth Amendment, and the Meaning of “Incomes,” 33 Ariz. St. L. J. 1057, 1116–1117 (2001). The Amendment was passed by Congress on July 12, 1909. See 44 Cong. Rec. 4440. And, the Secretary of State certified that the Amendment had been ratified by the States on February 25, 1913. 37 Stat. 1785.

B

With a full understanding of the context against which the Sixteenth Amendment was ra tified, two conclusions be

come clear. First, because the Amendment abolished Pol

lock ’s rule that an income tax must be classified as direct or indirect based on whether a tax on the source of that income would be direct or indirect, the Amendment created a con

stitutional distinction between income and its source. Sec

ond, because Sixteenth Amendment “income” must be dis

tinguished from its source, the Amendment includes a realization requirement.

1 I return, finally, to the text of the Sixteenth Amendment: “The Congress shall have power to lay and collect taxes on

——————

8 In fact, that possibility was suggested on the Senate floor as soon as the proposed amendment was read. 44 Cong. Rec. 3377 (“[I]f the Senator from Nebraska will change his amendm ent to the Constitution so as to strike out” all references to direct taxes, “he will accomplish all that his amendment proposes to accomplish and not make a constitutional amendment for the enacting of a single act of legislation”). But, Senator Brown responded that his “purpose [w as] to confine it to income taxes alone.” Ibid

.22 MOORE v. UNITED STATES

T HOMAS , J., dissenting
incomes, from whatever source derived, without apportion

ment among the several States, and without regard to any census or enumeration.” Against the background of Pol

lock , the “power to lay and collect taxes on incomes, from whatever source derived, without apportionment” under the Sixteenth Amendment has an obvious and narrow meaning. The only thing the Amendment changed about the Constitution was to abolish Pollock ’s rule that an in

come tax is a direct tax if a tax on the source of the income would be a direct tax. The Sixteenth Amendment left eve

rything else in place, including the federalism principles bound up in the division between direct and indirect taxes. The Court was first asked to interpret the Sixteenth Amendment in Brushaber v. Union Pacific Railroad Co.

, 240 U. S. 1. A taxpayer raised an exhaustive set of “twenty

one constitutional objections” to the first income tax under the Sixteenth Amendment. Id ., at 10. Recognizing that the text of the Amendment could not be understood in a vac

uum, the Court began with the text of the original taxing provisions and the history of the disputes over direct taxes from Hylton’s Case to Pollock . 240 U. S., at 12–17. I can little improve on Brushaber ’s explanation of the Sixteenth Amendment. “[T]he whole purpose of the Amendment was to relieve all income taxes . . . from apportionment [based on] a consider

ation of the source whence the income was derived.” Id ., at 18. Pollock stood for the rule that “whether a tax on income [is] direct” must be determined based upon a consideration of “the property from which the income [is] derived.” 240 U. S., at 18. It was by “the rule applied in the Pollock Case . . . alone” that income “taxes were removed from the great class of [indirect taxes] and were placed under the . . . direct class.” Id ., at 19. The Amendment did nothing more than remove that rule. The result was “the prevention of the re

sort to the sources from whic h a taxed income was derived in order to . . . place [an income tax] in the class of direct23 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting

taxes.” Ibid . But, other than that change, the Amendment “was drawn with the object of maintaining the limitations of the Constitution,” including Pollock ’s holding that direct taxes included “taxes levied di rectly on personal property because of its ownership.” Ibid

. The Sixteenth Amendment thus facilitated an income tax by creating a new constitutio nal distinction between “in

come” and its “source.” Under the Amendment, “from what

ever source” income is “derived ,” a tax on it is indirect and therefore not subject to the rule of apportionment. But, as to taxes on the sources of income, the restrictions imposed by the division between dire ct and indirect taxes continued to apply with full force. And, taxes on property continued to be classified as direct taxes.

2 Because the Sixteenth Amendment requires a way to dis

tinguish between income and source, it includes a realiza

tion requirement. The text of the Amendment incorporates such a requirement, and the concept of realization was well understood at the time of ratification. The Constitution thus limits unapportioned income taxes to taxes on realized income. The word “income” in the Sixteenth Amendment must be interpreted in light of the Amendment’s distinction be

tween income and source. As the Court appreciated in Eis

ner v. Macomber , failure to understand “income” in this way leads to an interpretation of the Sixteenth Amendment that mistakenly displaces aspects of the original taxing provi

sions that the Amendment left in place: “In order, therefore, that the clauses cited from Arti cle I of the Constitution may have proper force and effect, sa ve only as modified by the Amendment, and that the latter also may have proper ef

fect, it becomes essential to distinguish between what is and what is not ‘income.’ ” 252 U. S., at 206. Without an understanding of “income” that distinguishes24 MOORE v. UNITED STATES

T HOMAS , J., dissenting
it from “source,” the Sixteenth Amendment undermines the restriction imposed by the Di rect Tax Clause. The Govern

ment asserts that the Sixteenth Amendment uses “ ‘income’ . . . to refer to all economic gains.” Brief for United States 14 (some internal quotation marks omitted). That under

standing of “income” would allow taxes on real and personal property without apportionment. To be sure, most of the Government’s arguments focus on “taxes on individuals’ pro rata shares of undistributed corporate earnings.” Id ., at 13. But, the Government is not shy about the fact that its defi

nition of income includes things such as “increase in the value of a corporation’s capital assets,” “increase in the value of unsold property,” and “appreciation in the value of securities.” Id ., at 16 (alterations and internal quotation marks omitted). Those increases are “income” in a purely economic sense, but not in a sense that meaningfully dis

tinguishes between “income” and the “source” from which it is “derived.” A tax on each, whether it be an increase in assets, unsold property, or secu rities, would be a tax on the value of real estate or property, and should therefore re

quire apportionment under the Direct Tax Clause. The text of the Sixteenth Amendment points to the con

cept of realization, as the Court explained that concept in Macomber . The Amendment is clear that the word “income” refers to something that is “derived.” Dictionaries at the time of ratification defined “derive” as “[t]o receive, as from a source or origin” and “to draw.” Webster’s New Interna

tional Dictionary 601 (1913) (Webster’s). And, that sense of “derived” maps neatly onto Macomber ’s realization-focused definition of “income” as being “ received or drawn by the re

cipient (the taxpayer) for his separate use.” 252 U. S., at 207. In fact, the idea of realization as the distinction between income and source long predates both Macomber and the Sixteenth Amendment. As the Government acknowledges, “the concept” of “realization . . . was well established when25 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
the Amendment was adopted.” Brief for United States 15. The term “ realized ” appeared in several Civil War income tax provisions. Id ., at 16 (citing §116, 13 Stat. 281; §7, 16 Stat. 257–258). And, contemporaneous “[d]ictionaries de

fined ‘realize’ as ‘to convert any kind of property into money.’ ” Brief for United States 15–16 (quoting Webster’s 1778, and citing Black’s Law Dictionary 993 (2d ed. 1910); alteration omitted). The Gove rnment argues that the deci

sion to omit the often-used word “realized” from the Six

teenth Amendment is significant evidence that the Amend

ment does not require realizat ion. See Brief for United States 16. But, the choice to instead use the near-synonym “derived” merely reflects the repeated use of the word “de

rive” to describe the relationship of income to its source in Pollock , to which the Sixteenth Amendment was a direct response. See 158 U. S., at 618, 629, 635. The metaphor that the Court famously used in Macomber also shows the deep roots of the realization concept. To il

lustrate the “fundamental relation of ‘capital’ to ‘income,’ ” Macomber compared “the former . . . to the tree or the land, [and] the latter to the fruit or crop.” 252 U. S., 206. That understanding of income as being something “ severed from ”its source predated the Sixteenth Amendment. In a wellcited case from 1878, the Georgia Supreme Court relied on a tree-and-fruit analogy in a tax case to explain the differ

ence between income and proper ty: “The fact is, property is a tree; income is the fruit.” Waring v. Mayor and Aldermen of Savannah , 60 Ga. 93, 100 (1878); see also Black’s Law Dictionary, at 612 (defining “income” (citing Waring , 60 Ga., at 99)). The text of the Sixteenth Amendment, read against the background of its adoption, confirms that the “incomes” that the Sixteenth Amendment allows Congress to tax without apportionment are only realized incomes. We granted certiorari in this case to answer whether Congress may “tax unrealized sums without apportionment among26 MOORE v. UNITED STATES

T HOMAS , J., dissenting

the states.” Pet. for Cert. i. As the Sixteenth Amendment makes clear, the answer to t hat question is a resounding “no.” The Court errs today by failing to correct the Ninth Circuit’s contrary understanding.

* * * It is imperative to give the original taxing provisions in Article I their proper effect. Those provisions reflect a del

icate compromise under which the founding generation took the great risk of ceding much of the States’ exclusive taxing authority to the Federal Government. Supra , at 7–12. Without that compromise, the Constitution could easily have been rejected. To be sure, the States slightly altered the original agreement by ratifying the Sixteenth Amend

ment. But, a constitutional amendment does not affect our duty of fidelity to the aspects of the original agreement that remain in place—including the Direct Tax Clause. If a writ

ten constitution is to mean anything, the compromises it records must bind us until we amend them.

II The Court strains to uphold the Mandatory Repatriation Tax without addressing whether the Sixteenth Amendment includes a realization requirement, the question we agreed to answer in this case. The majority starts by surveying a scattered sampling of precedents—mostly about tax avoid

ance—to invent an “attribution” doctrine that sustains the MRT. The majority also relies on “longstanding congres

sional practice” to conclude t hat the Moores’ claim fails be

cause they cannot distinguish the MRT from similar taxes imposed by Congress in the past, which the Moores concede are constitutional. Neither point can withstand scrutiny.

A To avoid the question whether the Sixteenth Amendment requires realization, the majority reframes the case as be

-27 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
ing about whether Congress may attribute an entity’s real

ized income to shareholders or partners. Ante , at 8. Ac

cording to the majority, our precedents establish a “clear rule” that the Sixteenth Amendment empowers Congress to choose whether “to tax [an] entity on its income” or instead “tax the entity’s shareholders or partners on their share of the entity’s undistributed income.” Ante , at 17. Applying this rule, the Court concludes that the MRT permissibly chooses to attribute undistributed income earned by foreign corporations to their American shareholders. The Court thus refuses to address the “Government’s argument that a gain need not be realized to constitute income under the Constitution” because the foreign corporation has realized the income. Ante , at 12–13, n. 3. The majority’s Sixteenth Amendment “attribution” doc

trine is a new invention. The majority justifies its creation by plucking superficially supportive phrases from an eclec

tic selection of tax cases. But, none of the cases supports the proposition that the Sixteenth Amendment empowers Congress to freely attribute inco me to any taxpayer it rea

sonably chooses. The majority begins with Burk-Waggoner Oil Assn. v. Hopkins , 269 U. S. 110 (1925), a case that it says “articu

lated [the] fundamental principle” that “Congress could tax . . . income as it ch[ooses],” either by taxing an entity or an individual. Ante , at 9. But, Burk-Waggoner merely held that Congress may tax a de facto corporation on its own in

come, even if it is formally a partnership under state law. See 269 U. S., at 114 (“[N]othing in the Constitution pre

cludes Congress from taxing as a corporation an association which, although unincorporated, transacts its business as if it were incorporated”). Tellingly, we have never cited Burk-Waggoner for the proposition derived by the majority, but instead for the proposition that federal statutes “de

signed to tax income actually earned . . . are not to be frus

trated by state laws.” Commissioner v. Tower , 327 U. S.28 MOORE v. UNITED STATES

T HOMAS , J., dissenting
280, 288 (1946) (citing 269 U. S., at 114); see also Lyeth v. Hoey , 305 U. S. 188, 194 (1938) (same); Hemphill v. Orloff

, 277 U. S. 537, 550 (1928) (same). Burk-Waggoner thus shows that state law may not be used as a means of evading federal taxes—not that Congress may choose whether to at

tribute income to entities or individuals. The majority then cites Burnet v. Leininger , 285 U. S. 136 (1932), which it says “reiterated” that Congress can choose to impose income-tax liability “ ‘upon [a] partnership di

rectly’ ” or “ ‘upon the individuals carrying on business in partnership.’ ” Ante , at 9 (quoting 285 U. S., at 142; internal quotation marks omitted). But, the majority quotes lan

guage that is part of a due process holding, not an applica

tion of the Sixteenth Amendment. Leininger involved a tax

payer’s attempt to evade taxation by assigning half of his share in a partnership’s income to his wife. Id ., at 138. The taxpayer argued that assessi ng income taxes against him based on “a partnership interest owned by his wife” violated the Fifth Amendment’s Due Process Clause. Brief for Respondent in Burnet v. Leininger , O. T. 1931, No. 426,

p. 24. The Court rejected the argument, concluding that it did not violate due process to “tax the distributive share of each partner” by ignoring the taxpayer’s attempt to divert his income to his wife. 285 U. S., at 142. The majority is clear that it offers no opinion about due process questions. See supra , at 4–5, nn. 4, 6. Because Leininger is a due pro

cess case, it is unclear how it supports the majority’s Six

teenth Amendment attribution doctrine. Next, the majority claims that the Court “reaffirmed that Congress may choose to tax either [a] partnership or [its] partners” in Heiner v. Mellon , 304 U. S. 271 (1938), when it rejected the argument by members of a partnership “that Congress could not tax them on income that they did not and could not perso nally receive.” Ante , at 10. But, Heiner is a statutory interpretation case. Under the applicable29 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting statute, the taxpayers were subject to a tax on their “dis

tributive share, whether distributed or not, of the net in

come of the partnership.” §218(a), 40 Stat. 1070. The tax

payers argued only that “ther e was no distributive share” within the meaning of the statute, because distribution was currently impossible under state law; they made no argu

ment about the scope of Congress’s power. Brief for Re

spondents in Heiner v. Mellon , O. T. 1937, No. 144 etc.,

p. 34. Heiner ’s interpretation of the statutory phrase “dis

tributive share” cannot be und erstood as a holding about the scope of Congress’s supposed attribution power. The majority completes its survey of “attribution” prece

dents with Helvering v. National Grocery Co. , 304 U. S. 282 (1938), which it says extended Heiner ’s attribution princi

ple from partnerships to corporations. Ante , at 10. But, National Grocery demonstrates Congress’s ability to legis

late against tax-avoidance sc hemes—not an ability to freely attribute corporate income to shareholders. The majority misleadingly describes National Grocery as involving “the controlling shareholder of a co rporation” being taxed “indi

vidually . . . on the year’s profits.” Ante , at 10 (internal quo

tation marks omitted). In reality, the case involved a tax paid by a corporation—owned 100% by one person—after the corporation permitted prof its to accumulate without distribution “ ‘for the purpose of preventing the imposition of [a] surtax upon [the] sole stockholder.’ ” 304 U. S., at 285. In essence, the sole stockholder used the corporation as a tax-free bank account to hold what was really his income. The Court concluded that Congress may legislate to prevent “the sole owner of [a] business” from “conducting it as a cor

poration” to avoid the tax cons equences that would attach if the business had “been carried on as a partnership.” Id

., at 288. The Court cited Heiner merely to explain those tax consequences, not to support an attribution principle. Na

tional Grocery is yet another tax-evasion case, not an appli

cation of an attribution principle.30 MOORE v. UNITED STATES

T HOMAS , J., dissenting
At most, the cases cited by the majority demonstrate that Congress may attribute income to the entity or individual who actually controlled it when necessary to defeat at

tempts to evade tax liability. They do not suggest that Con

gress may freely choose whether to impose an income tax on a corporation or on its shareholders. The “clear rule” that the majority relies on to sidestep the realization ques

tion is thus a mirage. Ante , at 17.

B The majority separately concludes that the Moores’ claim fails because they cannot distinguish the MRT from other longstanding taxes that they concede are constitutional. The majority sees no distinction between the MRT and older taxes on partnerships, “S corporations,” and closely held foreign corporations under other parts of subpart F. Ante , at 16–21. But, the majority’s insistence that the MRT is just like other forms of pass-through taxation is not con

vincing. First, the MRT’s taxation of corporate shareholders is not like pass-through taxation of partners. The Moores are cor

rect that the Sixteenth Amendment allows Congress to tax partners on partnership income because “partnerships hav[e] no existence separate from their partners.” Brief for Petitioners 51. A partner’s share of partnership income is therefore understood to be his own income. The majority quibbles with the Moores’ understanding of early-20th cen

tury partnership law and points out that “legislatures treated partnerships as separate entities in many con

texts,” including for some tax purposes. Ante , at 17–18. But, the fact that a partnership can sometimes be treated as an entity is beside the point. The significant fact is that partners had long been considered to be subject to income taxes without consideration of the partnership; longstand

ing taxes based on that under standing are not implicated by the Moores’ challenge to the MRT.31 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting
Second, and for similar reasons, the MRT’s taxation of corporate shareholders is not like pass-through taxation of shareholders of “S corporations.” An S corporation is a cor

poration that does not have more than 100 shareholders, does not have any shareholder who is not an individual or who is a nonresident alien, does not have more than one class of stock, and which elects to be treated as an S corpo

ration. 26 U. S. C. §§1361(a)(1), (b)(1). These eligibility re

quirements make it clear that pass-through taxation of S corporations is merely an extension of the pass-through tax

ation of partnerships. Indeed, for most tax purposes, S cor

porations are equivalent to partnerships, not to corpora

tions. “Tax practitioners often say that an S corporation is taxed like a partnership.” CCH S Corp. Guide ¶510, p. 505 (2013); see also West’s Tax Law Dictionary (2024) (defining “S Corporation” as “Corporati on which elects S status and receives tax treatment similar to a partnership”). Taxing S corporation shareholders on corporate income is constitu

tional for the same reasons as taxing partners on partner

ship income. To the majority, “S corporations are another example of Congress’s authority to either tax the corpora

tion itself on corporate income or attribute the undistrib

uted income to the shareholders and tax the shareholders.” Ante , at 19. But, it does not make sense to look to S corpo

rations for conclusions about the pass-through taxation of corporate shareholders generally. Finally, the MRT is unlike other taxes on shareholders of closely held foreign corporations. The MRT “differs from other provisions of Subpart F”—the portion of the InternalRevenue Code dealing with controlled foreign corporations—because the MRT does not focus on “the corpora

tion’s receipt of investment earnings while subject to the shareholders’ control.” Brief for Petitioners 44–45. Sub

part F “aligns the corporation’s earning of the money being taxed with the shareholder’s control in the same year .” Re

ply Brief 23. But, “[t]he MRT by its terms takes no account32 MOORE v. UNITED STATES

T HOMAS , J., dissenting
of whether a shareholder had any interest or control when the corporation made the earnings that it attributes to her.” Ibid . In fact, the MRT “tags a shareholder with taxable ‘in

come’ even if ” he purchased shares “long after the corpora

tion earned the sums being taxed,” and it imposes no liabil

ity on taxpayers who owned shares for years of retained earnings but sold them before the MRT’s trigger date. Brief for Petitioners 45. Subpart F includes some minimal re

quirements to ensure that taxable “income” belongs to the shareholder in some way; the MRT abandons that effort en

tirely. The majority concludes that “the MRT . . . has the same essential features as subpart F.” Ante , at 21. But, unlike the rest of subpart F, the MRT has no connection at all to any “recognition event” or “cons tructive receipt of income,” and it offers no “rational basis for Congress to attribute in

come to a taxpayer.” S. McElroy, The Mandatory Repatria

tion Tax Is Unconstitutional, 36 Yale J. Reg. Bull. 69, 80– 81 (2018). The MRT turns solely on the ownership of stock on a certain date. That is a significant difference between the MRT and the rest of subpart F, and one with constitu

tional implications. The fact that the MRT has novel features does not mean that it is unconstitutional. But, the MRT is undeniably novel when compared to older income taxes, and many of those differences are constitutionally relevant. Because the MRT is imposed merely based on ownership of shares in a corporation, it does not operate as a tax on income.

C The majority is not ashamed to lay bare the consequen

tialist heart of its opinion. Because it wrongly concludes that the Moores’ constitutional argument would invalidate not only the MRT but also other longstanding taxes, the majority frets that the Moores would “deprive the U. S. Government and the American peop le of trillions in lost tax33 Cite as: 602 U. S. ____ (2024)

T HOMAS , J., dissenting revenue” and “require Congress to either drastically cut critical national programs or si gnificantly increase [other] taxes.” Ante , at 21. “The Constitution does not require that fiscal calamity,” the majority proclaims. Ibid . I agree. But, if Congress invites calamity by building the tax base on con

stitutional quicksand, “[t]he judi cial Power” afforded to this Court does not include the power to fashion an emergency escape. Art. III, §1, cl. 1. Even as the majority admits to reasoning from fiscal con

sequences, it apparently believes that a generous applica

tion of dicta will guard against unconstitutional taxes in the future. The majority’s analysis begins with a list of non

existent taxes that the Court d oes not today bless, including a wealth tax. Ante, at 8, n. 2. And, it concludes by offering a narrow interpretation of its own holding, hinting at limit

ing doctrines, prejudging futu re taxes, cataloguing the Gov

ernment’s concessions, and reserving other questions “for another day.” Ante , at 22–24. Sensing that upholding the MRT cedes additional ground to Congress, the majority arms itself with dicta to tell Congress “no” in the future. But, if the Court is not willing to uphold limitations on the taxing power in expensive cases, cheap dicta will make no difference.

III The Court today upholds the MRT, but not because it en

dorses the Ninth Circuit’s erro neous view that “realization of income is not a constitutional requirement.” 36 F. 4th, at 936. The majority acknowledges that the Sixteenth Amendment draws a distinction between income and its

source. Ante , at 7. And, it does not dispute that realization is what distinguishes income from property. Ante , at 8. Those premises are sufficient to establish that realization is a constitutional requireme nt. Sixteenth Amendment “in

come” is only realized income. We should not have hesi

tated to say so in this case. I respectfully dissent.