This report explains the major provisions of the federal estate and gift transfer taxes for transfers by nonresident aliens in 2014. This discussion highlights the different tax rules for estates of nonresident aliens as compared to the estates of U.S. citizens and resident aliens. In determining estate tax liability, the Internal Revenue Code (IRC) differentiates between the estates of U.S. citizens, resident aliens, and nonresident aliens. The estates of resident aliens follow the same rules and regulations to determine estate tax liability as do estates of U.S. citizens. However, the estates of nonresident aliens are taxed differently. This report will focus on the estate tax rules for this particular group of taxpayers. Department of the Treasury (Treasury) regulations define a "nonresident alien" for the purposes of the estate and gift taxes. However, other areas of the law, including income tax law, do not rely on the same definition or terminology for a "nonresident alien." This report will use the definition for U.S. citizens, resident aliens, and nonresident aliens found in the Treasury regulations' estate tax provisions. Determining the final estate tax liability of a resident or nonresident alien ultimately relies upon the citizenship of the decedent and whether the United States has signed an estate tax treaty with that country. These estate tax treaties alter some aspects of the U.S. federal estate tax rules discussed in this report. Even if a noncitizen-decedent is considered a U.S. resident under the IRC, an estate tax treaty may classify the decedent as a nonresident alien for U.S. estate tax purposes. This report will briefly discuss the implications of tax treaties on the treatment of estate and gift taxes for nonresident aliens, but will not address individual estate and gift tax requirements under each treaty. In order to understand the key differences between estate and gift tax liability for U.S. citizens, resident aliens, and nonresident aliens, this report will first discuss the definition of "nonresident alien" under the Treasury's estate and gift tax regulations. Next, the report will explain the estate tax requirements under the IRC for nonresident aliens and the necessary steps to calculate estate tax liability. Because the federal estate and gift taxes for U.S. citizens, resident aliens, and nonresident aliens are unified and use the same rate structure, the report will address the gift tax for nonresident aliens and the procedures used to calculate this tax. The report will conclude with a chart summarizing the differences regarding the tax treatment among estates of U.S. citizens, resident aliens, and nonresident aliens. Under the estate tax regulations, a "resident" decedent is a decedent who, at the time of his death, had his domicile in the United States. A person acquires a domicile in a place by living there, for even a brief period of time, with no definite present intention of later leaving that place. A person's residence will not qualify as a domicile unless the person has the requisite intent to remain in such residence indefinitely. An intention to change domicile will not generate such a change unless accompanied by actual removal; intent to leave is not sufficient. A nonresident alien, for purposes of the estate tax, is an individual who, at the time of his death, had his domicile, as defined above, outside of the United States. An individual who is present in the United States on a nonimmigrant visa can be considered a resident for estate and gift tax purposes if the individual wants to permanently remain in the United States even though the visa does not allow permanent residence. Because the determination of a person's "domicile" relies upon the intent of an individual, a bright-line test to determine if an individual is a resident for federal estate and gift tax purposes is not available. Therefore, the courts consider the following factors in making such a determination: visas, work permits, location of business and property interests, family immigration history, residential property, individual testimony, motivation, duration of stays in the United States, and community group affiliations. The federal estate tax is a tax on the estate of a decedent, levied against and paid by the estate. The determination of federal estate tax liability involves a series of adjustments and modifications of a tax base known as the "gross estate." Certain allowable deductions reduce the gross estate to the "taxable estate." Then, the total of all lifetime taxable gifts made by the decedent is added to the taxable estate before tax rates are applied. The result is the decedent's estate tax which, after the reduction for certain allowable credits, is the amount of tax paid by the estate. The first step in determining estate tax liability for citizens, resident aliens, and nonresident aliens is to designate the "gross estate," which consists of property in which the decedent held an interest at the time of death. However, the gross estates of nonresident aliens, for federal estate tax purposes, include only property "situated" in the United States. Real property and tangible personal property physically located in the country qualify as property "situated" in the United States. Shares of stock issued by a corporation incorporated in the United States, regardless of the physical location of the certificates, and debt obligations of U.S. persons or political subdivisions are also "situated" in the United States. Certain types of property, such as works of art imported or loaned for exhibition purposes, are not considered to be "situated" in the United States for the purposes of defining the gross estate. Like the estates of citizens and resident aliens, the value of the nonresident alien's gross estate is based on the fair market value of the decedent's estate at the date of death. Fair market value is the price at which the estate property would change hands between a willing buyer and seller. An alternative valuation date of six months following the date of death may be used if the value of the estate is reduced between date of death and the alternate date. Nonresident alien estates of more than $60,000 in U.S. gross assets must file a federal estate tax return. A decedent's taxable estate is determined by reducing the gross estate with allowable deductions. Estates of citizens, resident aliens, and nonresident aliens share many deductions, including estate administration expenses, certain debts and losses, charitable bequests, and the amount of qualified transfers to a surviving spouse, although some differences in calculating these deductions may apply. Estates of nonresident aliens may deduct a portion of certain expenses and losses, such as funeral and administration expenses and debts with respect to property included in the gross estate. The portion of these expenses that a nonresident alien's estate may deduct is determined by the proportion of the value of the gross estate situated in the United States to the value of all estate property, wherever situated. Whether the decedent incurred the debt or loss in the United States is irrelevant for the purposes of this deduction. Estates of nonresident aliens may also deduct charitable contributions to a U.S. government entity for exclusively public purposes, a U.S. charitable corporation, a charitable trust that uses the gift for its charitable purposes within the United States, and certain U.S. fraternal societies. Like the estates of citizens and resident aliens, the estate of a nonresident alien may deduct from the gross estate the value of property passing to the decedent's surviving spouse, under certain circumstances. If the surviving spouse is a U.S. citizen at the time of the decedent's death, a martial deduction is allowed if the other requirements outlined in IRC's Section 2056 are satisfied. Section 2056 forbids the marital deduction if the interest in property that is being passed to the spouse would terminate on the occurrence or non-occurrence of an event; if another interest in that property has passed for full consideration in money; and if a third person may possess an interest in the property after the termination of the spouse's interest. These rules apply to the estates of citizens and resident aliens as well. If the surviving spouse is not a U.S. citizen (regardless of whether he or she resides in the United States), the bequest to the surviving spouse will not qualify for the marital deduction unless the property is held in a qualified domestic trust (QDOT) or unless the surviving spouse becomes a U.S. citizen within a specified period after the decedent spouse's death. The purpose of the QDOT is to ensure the payment of the federal estate tax that was deferred on the death of the first spouse through the marital deduction because of the possibility that the surviving noncitizen spouse's estate will not be subject to the federal estate tax. A QDOT must have at least one U.S. trustee who is an individual citizen or a domestic corporation and has veto power over distributions from the trust. The trust instrument of a QDOT must prevent distributions from the trust unless a U.S. trustee has the right to withhold estate tax imposed on the distribution. If the assets passing to the QDOT exceed $2 million, the U.S. trustee for the QDOT must either be a bank or must furnish a bond or letter of credit. The estate's executor must make an election to apply the QDOT rules. The estate tax is payable on a taxable event, which includes principal distributions from the QDOT to the surviving noncitizen spouse. The balance of the trust value is taxed at the noncitizen spouse's death. The estate tax is calculated based on the decedent's tax brackets and can account for the decedent's taxable gifts and other adjustments. A QDOT is not necessary if the surviving spouse is a U.S. citizen before the decedent's estate tax return is due as long as the spouse resided in the United States after the decedent's death and before becoming a U.S. citizen. Like the estates of citizens and resident aliens, estates of nonresident aliens are subject to the unified estate and gift tax system.