Source: http://ata-tax.jp/service/index06_en.html
Timestamp: 2018-03-23 05:00:53
Document Index: 302099869

Matched Legal Cases: ['art 1', 'art 4', 'art 4', 'art 2', 'art 2', 'art 6', 'art 11', 'art 18', 'art 4', 'art 2', 'art 28', 'art 1', 'art 23', 'art 31', 'art 4', 'art 3', 'art 2', 'art 4', 'art 1', 'art 4', 'art 3', 'art 2']

This memorandum is to summarize Japan individual income tax on salary income principally for expatriate employees and directors in Japan. Another focus of this memorandum is stock remuneration currently more prevalent, but its taxation is not as straight forward as cash remuneration’s.
US tax information is inserted to compare with Japan tax and illustrate differences between two countries which might lead to tax duplication.
Filing individual income tax return
Scope of Japan tax on salary income
Source allocation of compensation for service rendered inside or outside Japan
Income tax on stock award as compensation for service
International tax duplication
Tax planning mainly on stock award
I. FILING OF JAPANESE INDIVUDUAL INCOME TAX RETURN
Filing the individual income tax return annually by March 15 on the taxable income of the previous calendar year
Extension of the filing due date is generally not acceptable
Failure to file penalty: 15% on tax liability up to JPY500,000 and 20% on tax liability beyond.
No filing status. Married filing jointly is unavailable in Japan.
Resident is not required to file tax return if the taxable income is limited to salary paid in Japan not exceeding JPY20,000,000 from which the employer withheld income tax and duly settled.
Annual income tax final liability is due on the same as of the filing due date, i.e. March 15 unless bank account withdrawal on April 20 is applied.
Failure to pay penalty: 2.7% on tax liability until 2 month after the filing due date and 9.0% thereafter (Rate is subject to change after 2017)
Statute of limitations on assessment: 5 years from due date of return (7 years in case of fraud or false returns)
II.	TAX ON SALARY INCOME
1.	Scope of Japan tax on individual income
Scope of Japan’s taxable individual income varies on tax payer’s residency status as follows;
Resident status Taxable income
Resident Permanent resident Worldwide income
Non-permanent resident Non-foreign source income and foreign source income paid in Japan or remitted into Japan
Non-resident Japan source income
Comparison with US tax is illustrated below;
US tax US National (US Citizen) Resident Worldwide income
Foreign national (Alien) Resident alien
Non-Resident alien US source income
Japan tax Japan National (Permanent) Resident Worldwide income
Foreign national Permanent resident Worldwide income
From general tax principle of resident taxed on worldwide income and non-resident taxed on the income raising within the country, US and Japan have following variation.
US taxes US citizen on its worldwide income regardless of residency;
Japan places a hybrid category of "non-permanent resident" exempt from Japan income tax on foreign source income if it is neither paid in Japan nor remitted into Japan.
Most expatriates are assigned in Japan less than 5 years and take advantage of the limited scope of Japan tax on non-permanent resident.
2.	Residency Status
Possession of domicile or residence (Note) in Japan Residency status
None or Less than 1 year Non-resident
For 1 year or more Aggregate period of possession in the past 10 years Not exceeding 5 years Non-permanent resident (or Permanent resident if either Japanese national or those who declares the intention of permanent residency)
Exceeding 5 years Permanent resident
Residency status is determined by possession of residence or domicile in Japan.
Domicile: Center of living recognized by facts and circumstances of address, profession, location of family and property.
Residence: Place to stay for a certain period but not recognized as center of living
Those who stay in Japan for work is assumed to possess domicile in Japan unless the assignment letter or other proof demonstrates the length of the stay less than a year.
3.	Tax rate on salary income
In US director’s remuneration is classified as self-employment income, while in Japan remuneration for service of both employee and director is categorized as salary income. In this memorandum, salary income refers to remuneration for both employee and director unless otherwise mentions.
Tax rate of Japan income tax on salary income is added to Chart 1 as follows;
Tax rate on salary income
Resident Permanent resident world-wide (salary of Japan source and foreign source) Progressive tax rate ranging from 15 to 56% (56% on tax base over JPY40 million) on tax base after aggregation with other source of income (Note)
Non-permanent resident Japan source salary and foreign source salary paid in Japan or remitted into Japan. (Director’s remuneration of Japanese company is entirely Japan source.)
Non-resident Only Japan source salary Fixed at 20.42%
(Note) Salary income, business income, rental income, miscellaneous income are aggregated and taxed at the progressive rate. Capital gain of securities and real estate as well as retirement allowance is taxed separately from the aggregated income. Taxation on interest and dividend varies widely on category and/or election.
4.	Japan source salary income
Employee’s salary income including taxable fringe benefit is subject to source allocation on time basis of days of physical presence either inside or outside Japan as follows.
Japan source salary income of employee:
Compensation attributable to the period X (A)	minus Number of days of business trip outside Japan
Number of days to which the compensation is attributable (A)
The percentage of time for which the employee works in Japan during the applicable period determines the percentage of Japan source. This rule applies also to compensation attributable to service provided over a year such as deferred compensation of employee stock option, restricted stock, RSU.
For the non-permanent resident employee who spends substantial days of overseas business trips, salary paid outside Japan is more tax favorable as long as it is not remitted into Japan because overseas business trip reduces taxable income in Japan (Chart 4).
Adjustment for days of home leave should be inserted to the calculation.
Source allocation of salary income is not available to director’s remuneration paid or borne by Japanese company because it is entirely regarded as Japan source income (Chart 4). Expatriate’s director status of Japanese company curtails tax merits which would be otherwise available if the expatriate was an employee during the initial 5 years period after entry into Japan.
As for US tax, IRS also applies the time basis allocation for salary, except for certain fringe benefits on geographical basis allocation (housing benefit allocated by the location of principle place of work and tax reimbursement allocated by the location of tax jurisdiction), unless the taxpayer demonstrates and IRS accepts alternative basis as a more proper determinant than time basis or geographical basis. Japan applies generally the time basis to overall compensation including fringe benefits.
US tax applies the time basis allocation of remuneration of not only employee but also of director. On the other hand US-Japan tax treaty allows resident country of the company of which the director is a board member to tax on such director’s remuneration. Director remuneration of non-resident alien under US tax (Chart 2) in Japan who is a board member of the US company is taxable not only in Japan but also in US but to the extent of US source portion on time basis (not limited to US source portion in case of US citizen and resident alien under US tax (Chart 2)). This is further extended to III. 8.(3).
•	Another US-Japan difference lies on source allocation on stock option as explained in III. 6. (4).
III.	INCOME TAX ON STOCK AWARD TO EMPLOYEE AND DIRECTOR
1.	Stock award for employee and director
Among various types of stock award as deferred compensation for service, income tax on following 3 types of stock award are summarized here.
(1)	Stock option:
option as payment for services to buy stock at a fixed price
(2)	Restricted stock:
Stock granted under certain restrictions typically including vesting schedule
Stock issued at grant but retained by company while employee usually holds voting right and dividend after the grant
(3)	Restricted stock unit (RSU):
Unsecured promise to pay a set number of stock upon completion of vesting schedule.
No stock issued at grant, consequently no voting right nor actual dividend endowed until vesting
2.	Taxable event on stock award
Stock award can be classified into either tax deferral type or non-tax deferral type as to whether taxable event defers until sale of the underlying stock subject to capital gain taxation.
Tax Deferral type (Statutory stock option) Tax deferral is allowed only to the stock option meeting certain conditions designated by the law. Income tax is charged at the time of sale of the underlying stock as capital gain, but the capital gain is attributable to both (1) economic benefit of discount purchase of the underlying stock at the time of the option exercise and (2) capital gain (or loss) by the sales price over (or under) the market price at the time of the option exercise.
Non Tax-Deferral type (Non-Statutory) Stock award unqualified for statutory stock option is charged income tax on the economic benefit of discount purchase below the market price as salary income at the time of either (1) grant of the award, (2) vesting (no longer subject to substantial risk of forfeiture) or (3) exercising the option. After vesting/exercising, the employee or the director holds the underlying stock as a stock investor. Subsequent sale of the underlying stock is treated as straightforward sale of the stock subject to capital gain taxation.
Tax Deferral (Statutory stock option) Non-taxable Non-taxable Capital gain/loss
Non Tax-Deferral (Non-Statutory) Taxable salary income Non-taxable Capital gain/loss
Non-taxable Taxable salary income Capital gain/loss
(Note) In Japan, economic benefit of discount on employee stock purchase plan is not taxable when the discount is less than 10% of the stock value as of the date when the purchase price is fixed, as de minimis exception, which might be comparable to US ESPP allowing discount up to 15% (Chart 6).
(1)	Dividend paid on restricted stock before vesting is treated as;
(USA) Additional compensation,
(JPN) No established rule, but likely to be dividend income.
(2)	In Japan, salary income of non-resident is taxable to the extent of Japan source portion, but capital gain of non-resident having no permanent establishment in Japan is not taxable unless any of the following meets;
it is capital gain of stock attributable to Japan’s statutory stock option.
it is transfer of more than 5% of listed (2% of unlisted) outstanding share of real estate holding company of which real estate located in Japan constitutes 50% or more asset in value.
it is transfer of 5% or more of outstanding share of Japanese company by the non-resident who owned 25% or more share at any time during 3 years period before end of the year of the transfer.
3.	Statutory stock plan
Major requirements of statutory stock option;
Incentive Stock Option, ISO Employee Stock Purchase Plan, ESPP Tax Qualified Stock Option
Grantee Employee not holding voting power more than 10% (Note) Employee not holding voting power more than 5% Director or employee not holding more than 10% (listed stock) or 30% (non-listed)
Exercise price Not less than fair market value at the grant date Not less than 85% of smaller of (A) fair market value at the grant date or (B) fair market value of the exercise date Not less than fair market value at the grant date
Holding period No transfer within 2 years from the grant nor within 1 year after exercise No transfer within 2 years from the grant
Annual ceiling Value of stock (value as of grant) exercisable p.a. not exceeding Exercise price not exceeding JPY 12 million in total p.a.
USD100,000 USD25,000
(Note) 10% shareholder rule is exempted when the option price is 110% or more of the fair market value at the grant date and the option expires in 5 years after grant, which would be otherwise 10 year under 10% shareholder rule.
Stock option granted by foreign parent/subsidiary to purchase stock of such foreign company can be statutory stock option in US, but not in Japan because statutory stock option is available only to;
Stock option issued by Japanese company, Or
Newly established Japan affiliate for either Research & Development or supervisory business certified as an Asian Business Center under Act for Promotion of Japan. But it is rarely applied.
4.	US tax on Stock option, Restricted stock, Restricted stock unit(RSU)
(1)	US tax on statutory stock option (ISO, ESPP)
Taxable income is not recognized until transfer of the underlying stock.
Non-taxable Non-taxable Capital gain/loss = Selling price minus exercise price
It provides more tax deferral than non-statutory option and allows the tax payer to treat all income associated with option as long term capital gain taxable at rate of 15% in US.
(2)	US tax on non-statutory stock option
Either (A) or (B) depends on availability of market price of stock option.
(A)	Option with readily determinable value
If the stock option is actively traded on an established market or its value is otherwise measurable with reasonable accuracy based on certain tests, the option holder is taxed at grant on the value of option itself as salary income. But it is uncommon for employee stock option to have readily determinable value. Exercising stock option of (A) type is not taxable just like “plain vanilla” stock option, and the total of the exercise price and the taxable salary recognized at the option grant constitutes cost of sales (i.e. adjusted basis) under capital gain taxation.
Taxable salary income at fair market value of stock option Non-taxable Capital gain/loss = Selling price – Cost (the price paid + the amount already included in the income)
Stock holding period begins
(B)	Option without readily determinable value
This is common for the employee stock option. Stock option is taxable at the time of option exercise as salary income. Market price at the time of option exercise constitutes cost of sales (adjusted basis) under capital gain taxation.
Non-taxable Taxable salary income at fair market value of stock minus exercise price Capital gain/loss = Selling price – Cost (the price paid + the amount already included in the income)
If the tax payer sells the stock immediately after exercise, taxable salary income is recognized but not capital gain because of adjusted basis of the stock equaling the selling price.
83(b) election (III.4. (3)) is not available to stock option.
(C)	Discounted stock option
Non-statutory stock option with an exercise price less than fair market value of the underlying stock at the date of the grant (“discounted stock option”) is subject to Section 409A as nonqualified deferred compensation and taxed at the date of substantially vested (i.e. it is not subject to substantial risk of forfeiture) except in limited circumstances such as separation of service, disability, death, change in control of the business or unforeseen emergency. Nonqualified deferred compensation is charged also surtax equivalent to 20% of the deferred compensation and the interest as designated by Section 409A.
Non-taxable Taxable salary income at fair market value of stock minus the price paid. Additional surtax + interest charged up to the exercise Capital gain/loss = Selling price – Cost (the price paid + the amount already included in the income)
Chart 11: Exercise price: 800
Employee stock option granted in 2011 with the exercise price of 800 which is lower than 1,000 of the fair market value of the underlying stock at the time of the grant is regarded as nonqualified deferred compensation. The option becomes not subject to substantial risk of forfeiture at the end of 2013 and exercised in 2016. In this case, deferred compensation of 400 (fair market value of 1,200 over the exercise price of 800) is taxable at vesting in 2013. Thereafter non-qualified deferred compensation based on the year-end value of the underlying stock (50, 100 and 150) is taxable each year as well as surtax and interest until the exercise in 2016.
Risk of harsh tax consequence under 409A hampers especially private companies to issue employee stock option.
(3)	US tax on restricted stock
Taxable at vesting similar to stock option without readily determinable value.
Non-taxable Taxable salary income at fair market value of stock Capital gain/loss = Selling price – Cost (the price paid + the amount already included in the income)
Substantially vested:
•	Transferable or release from substantial risk of forfeiture, whichever earlier
83(b) election is elective to treat the stock taxable in the year granted, which can avoid salary taxation on appreciation of the stock value thereafter, while the taxpayer risks the forfeiture of the stock and the tax paid by 83(b) election but not refundable.
Taxable salary income at fair market value of stock minus any payment Non-taxable Capital gain/loss = Selling price – Cost (the price paid + the amount already included in the income)
83(b) election is available to tangible property including restricted stock, but not available to stock option nor stock right like RSU.
(4)	US tax on restricted stock unit (RSU)
Similar to option without readily determinable value or restricted stock.
83(b) election is not applicable to RSU.
5.	Japan tax on Stock option, Restricted stock, Restricted stock unit
(1)	Japan tax on statutory stock option
Similarly to US tax, tax is deferred until transfer of the underlying stock.
Non-taxable Non-taxable Capital gain/loss = Selling price - exercise price
(2)	Japan tax on non-statutory stock option
Similar to US tax, the fair market value of the underlying stock over the option exercise price at the time of option exercise is recognized as taxable salary income at the time of option exercise.
Non-taxable Taxable salary income at fair market value of stock minus exercise price Capital gain/loss = Selling price - Fair market value at exercise
Discounted stock option is taxable also at the option exercise, which is different from US tax as described in III.4. (2) (C).
(3)	Japan tax on restricted stock unit (RSU)
Similarly to US tax, taxable at the time of the vesting. Alternative like 83(b) election is not available.
Non-taxable Taxable salary income at fair market value of stock Capital gain/loss = Selling price - Fair market value at substantially vested
6.	Japan source allocation of benefit of discount purchase of stock
(1)	Nature of the economic benefit of discount purchase
Economic benefit of discount purchase of employee or director is generally regarded as salary income in Japan.
Chart 18 (Non-statutory stock option)
Benefit of discount purchase of the underlying stock is salary income in the amount of 500.
(2)	Source allocation
Time basis source allocation in II.4.applies to multi-year remuneration arrangement like stock award. When the period of expatriate’s assignment in Japan (i.e. from the date of entry into Japan to the date of permanent departure from Japan) straddles the grant date and/or the vesting date, the economic benefit of 500 would be attributable partly to Japan source and partly to foreign source on the time basis of days of physical presence either inside or outside Japan.
When an expatriate enters into Japan in 2012 one year after the grant date and exercises the option in 2016, Japan source is calculated roughly at 4/5 on the time basis allocation from grant to exercise. In actual tax calculation, the precise ratio should be calculated using the number of days with adjustment for days of overseas business trip and home leave during the period of Japan assignment. For example;
If days of business trips abroad spends 10% of days from grant to exercise, Japan source percentage reduces by 10% additionally.
(3)	Source allocation after departure from Japan
Benefit of discount purchase of stock after permanent departure from Japan is still subject to Japan tax to the extent of Japan source portion on the time basis. Tax rate of non-resident’s salary income is fixed at 20.42%, which is often lower than the resident’s progressive tax rate ranging from 15% to 56% (Chart 4). It is a common practice to appoint a tax representative in Japan before permanent departure to administrate Japan tax affairs on behalf of the taxpayer.
In case of 5 years period from grant to exercise, an expatriate lived in Japan for 3 years during which he (or she) spent 10% for overseas business trips before permanently departure from Japan. Japan source income is allocated on time basis to be 270 taxable at the fixed rate of 20.42%.
(4)	Difference between US and Japan on source allocation of stock option
Both US and Japan generally apply time basis to source allocation for salary income as described in II.4. However the base period of the source allocation ends on the date of vesting of the option (conditions for option exercise has been satisfied) in US tax but on the date of option exercise in Japan tax. Not only Japan but also UK and Canada concluded tax treaty with US setting forth the same ending date rule.
Option exercise one year after the vesting raises difference in Japan source allocation between 3/5 by US domestic rule and 4/5 by Japan rule and US-Japan tax treaty rule. Restricted stock and RSU are taxable at vesting in both countries and so the same allocation base is expected.
7.	Employer’s report of foreign parent company’s stock based compensation
In Japan, the local employer is statutory requested for annual report to the tax office on each employee’s and director’s (including ex-employee, ex-director and those of the non-resident) benefit from stock based compensation (including stock equivalent cash award like phantom stock) from the foreign parent company (50% or more holding directly and indirectly) or the foreign head office with following details; name of employee or director, its address, date of vesting/exercise, nature of benefit, value of benefit, number of underlying stock, unit value, currency, date of grant, type of award, total number of stocks or other benefits granted, name of the grantor (the parent company or the head office), the country of the grantor, acquisition cost (exercise price, if any).
It is advisable, not statutory required though, that the local employer provides copy of the report to the relevant employee and director to avoid discrepancy from the taxpayer’s individual income tax return.
8.	Foreign tax credit
To eliminate income tax duplication between countries, foreign income tax paid is creditable against domestic income tax (“Foreign Tax Credit, FTC”) to the extent of the domestic income tax generated by the foreign source income based on the following formula;
FTC limit;
Domestic income tax X Foreign source income
Foreign income tax in excess of FTC limit carries forward to subsequent years.
Both US and Japan apply this formula with some differences as follows;
FTC eligible taxpayer US citizen, Resident alien Resident
Calculation unit of FTC limit Each 5 category of income Overall income
Adjustment of foreign source income for FTC purpose, e.g. qualified dividend and/or capital gain to balance with domestic reduced tax rate Yes No
Carry back 1 year N/A
Carry forward 10 years 3 years
US calculates FTC limit of each 5 categories of the income type separately and adjust the amount of certain foreign source income to balance with US tax rate on the same type or to comply with the foreign policy, while Japan calculates FTC limit in aggregate of all categories of income leaving difference in tax rate by income type, which implies (2) below;
(2)	Single “basket” in Japan FTC calculation
Japan’s FTC limit calculation on single unit (or to say “basket”) of aggregated incomes regardless of tax rate difference on income type could allow FTC disproportionately to Japan tax rate actually levied like following example;
Japan FTC calculation of permanent resident
Taxable income Tax rate Income Foreign tax Japan tax
(1) Foreign source capital gain 100
Foreign tax 30% 30
Japan tax 20% 20
(2) Non-foreign source any other income 500
Foreign tax 0 0
Japan tax 40% 200
Total 600 30 220
Japan FTC limit;
600 = 36
Japan FTC limit of 36 exceeding the foreign tax of 30 successfully relieves the tax duplication. However, foreign tax of 30 on the capital gain overweighs Japan tax of 20 on the same capital gain by 10. Strangely enough foreign tax of 10 in excess of Japan tax on the capital gain is generously creditable against Japan tax levied on any other income which is not subject to foreign tax.
(3)	Director’s remuneration
FTC formula accentuates absolute requirement of foreign source income for tax credit, while director remuneration has difference in source allocation and taxation between countries as addressed in II.4. When an US citizen (or resident alien under US tax like Green card holder) in Japan is a board member of US company and works only in Japan thus “no foreign source”, salary income of such remuneration is taxable not only in Japan but also in US because of worldwide income taxation for US tax purposes (Chart 2). Tax duplication in this case is relieved by US-Japan tax treaty which deems the income taxed in US to be US source income for FTC purposes replacing time basis allocation. Tax duplication in director’s remuneration and the remedy partly depend on the other tax jurisdiction and/or tax treaty concluded with Japan and do not always work out. But recent Japan tax reform and practice extends the idea of US-Japan tax treaty’s “replacing time basis allocation” to other tax treaty partners and deems the income taxed in accordance with the tax treaty by the treaty partner not limited to US to be foreign source income for Japan FTC purposes. When Korean company’s director resident in Japan does not work outside Japan, Korean tax on Korean company’s director remuneration was previously not creditable against Japan tax but currently creditable against Japan tax in Japan FTC.
9.	US―Japan tax treaty on stock option
Tax treaty is another relief from tax duplication by ruling taxation right;
Country of resident has the primary right to tax on capital gain
Country of income source has the primary right to tax on salary income.
As for taxation on statutory stock option deferred until transfer of the underlying stock as capital gain taxation, the capital gain includes the benefit of discount purchase of the underlying stock which would be otherwise taxed as salary income at the time of option exercise. Protocol of US-Japan tax treaty allows the country of which the tax payer is not resident at the time of stock option exercise to tax on the proportion of benefit attributable to the period between the grant to the exercise during which the tax payer works in the country.
Country Stock option Residency Status at;
Exercise Stock sale
JPN Statutory Non-resident Non-resident
USA Non-Statutory Resident Resident
Japan tax on Japan’s statutory stock option defers until sale of the underlying stock under capital gain taxation, (Scope of Japan tax on non-resident includes the capital gain of Japan’s statutory stock option as addressed in III.2 (Note)(2)), while US-Japan tax treaty allows Japan to tax on Japan source portion of salary income. Due to salary income of 500 larger than capital gain 450, 450 instead of 500 is allocated on the time basis to Japan 324 as Japan source subject to capital gain taxation according to Japan National Tax Agency’s advance inquiry. It is expected that the benefit of the option exercise 500 is portioned to US source in the amount of 140.
10.	Relief of tax duplication by US-Japan tax treaty and foreign tax credit
Relief from tax duplication on non-statutory type of stock option occasionally requires both tax treaty and foreign tax credit as follows;
JPN Non-Statutory Permanent resident Resident
USA Non-Statutory Non-resident Non-resident
Taxable income at
JPN tax 500 Capital loss Δ50
US tax 140 N/A
Permanent resident’s exercise of non-statutory stock option triggers Japan income tax on the entire benefit of 500 while US-Japan tax treaty allows US to tax on a proportion of 500 attributable to taxpayer’s service in US in the amount of 140. Capital gain/loss is subject to taxation of the resident country Japan. Tax duplication lies on US source income of the benefit of the option exercise of 140, but US tax paid on 140 could be creditable against Japan income tax through Japan FTC in this case.
If the taxpayer is a non-permanent resident, tax treatment changes as follows;
Chart 28; Taxpayer: non-permanent resident in Japan
JPN Non-Statutory Non-Permanent resident Resident
In Japan tax duplication is unlikely because the benefit of the option exercise of 500 is allocated between US and Japan on the time basis, unless US source of 140 is paid in Japan or remitted into Japan and taxed in Japan.
JPN tax 360: Tax scope on non-permanent resident (Chart 1) Capital loss Δ50
US tax 140: US-Japan tax treaty allows US tax on US source N/A
11.	Tax duplication due to limit of Japan FTC carry-forward
Carry forward of Japan FTC expires in 3 years (Chart 23). Foreign tax paid over 3 years ago is not creditable in Japan leaving tax duplication unrelieved in Japan.
JPN Statutory
Non-permanent resident or
Japan tax on Japan’s statutory stock option defers until sale of the underlying stock as capital gain taxation, while US-Japan tax treaty allows US to tax on US source portion of salary income of 120. When the year of US tax payment on US source of 120 is 4 years or more prior to the year of the transfer of the underlying stock, US tax on 120 is not creditable against Japan tax on the capital gain, leaving tax duplication on US tax on 120 unrelieved in Japan. Of course US citizen or resident alien has a chance to mitigate a part of the tax duplication through US FTC or itemized deduction in US tax later.
Consequence is significant in case of discounted stock option taxable for US tax at the vesting and annually thereafter until the option exercise. When the year of US tax payment on the vesting is over 3 years prior to the year of the option exercise, US tax on the vesting is not creditable against Japan tax on the benefit of the option exercise.
Chart 31 Discounted stock option: exercise price 800
Country Stock option (Discounted stock option) Residency Status at;
JPN Non-statutory
US tax paid on US source portion of the vesting of 400 becomes out of date for Japan FTC in the year of the option exercise therefore not creditable against Japan tax on 800 (or Japan source portion of 800 in case of non-permanent resident), leaving tax duplication on US tax on 400 unrelieved.
Timing difference between countries on taxable event is prominent at 83(b) election on restricted stock. When a tax payer elects 83(b) on restricted stock and seeks US tax on the grant to be creditable against Japan tax on the vesting later, the year of the vesting should be within 3 years after the year of US tax payment on the grant.
12.	Tax duplication due to foreign tax paid during non-resident period
Foreign tax paid before entry into Japan is not creditable against Japan tax, resulting in tax duplication as follows.
USA Non-Statutory Resident Non-resident
Japan tax defers until transfer of the underlying stock as capital gain taxation is preceded by US tax at the option exercise. Japan FTC rules out foreign tax paid before entry into Japan resulting in the tax duplication unrelieved in Japan. Of course US citizen or resident alien has a chance to mitigate a part of the tax duplication through US FTC or itemized deduction in US tax later.
The exposure would be worse in case of discounted stock option;
US tax at the time of the vesting before entry into Japan cannot be creditable against Japan tax at the time of exercise, leaving so significant tax duplication unrelieved that nothing might be left after tax.
The same story could be applicable to 83(b) election on restricted stock due to timing difference between countries on taxable event.
Protocol of US-Japan tax treaty remarks that the competent authorities will explore to resolve unrelieved tax duplication by mutual agreement, but it would cost too much time and money to be practical in many cases.
IV.	TAX PLANNNIGN FOR EXPATRIATES
Mostly not limited to the stock award, following ideas would help the employer planning tax-efficient compensation to deploy international workforce and the expatriate saving income after tax.
Avoid appointment of registered director of Japanese corporation.
Director remuneration paid or born by Japanese corporation is regarded as entirely Japan source income (Chart 4), which would be otherwise allocable partly to foreign source income (II.4) if the taxpayer was employee during the initial 5 years period after entry into Japan as a non-permanent resident (Chart 3)
Limit Japan assignment up to 5 years
Residency in Japan over 5 years is the permanent resident taxpayer whose tax base extends to worldwide income (Chart 2 and 3).
Pay outside Japan
Foreign source salary of non-permanent resident is not taxable unless it is paid in Japan or remitted into Japan. (Chart 4) “Salary payment outside Japan” is such that salary is administrated outside Japan usually by the foreign parent or the foreign head office, which is not obliged to withhold Japan income tax from the salary. Overseas remittance to bank account outside Japan form the payroll administration in Japan is included in “payment in Japan”. Award of foreign parent’s stock is generally regarded as payment outside Japan.
Do not remit the foreign source income into Japan
Foreign source income (not limited to salary income) of non-permanent resident is taxable if it is paid in Japan or remitted into Japan. (Chart 1). Regardless of the remitter either the taxpayer itself or anyone else, the tax authority is likely to deem overseas remittance into Japan to be attributable, at least partly, to foreign source income paid abroad because the source of the remittance, probably mixture of various sources, is difficult to be identified and “money cannot be colored”. Overseas remittance into Japan over JPY 1 million is automatically reported to the tax authority by the financial institution.
Defer taxable event until permanent departure from Japan
Tax rate on non-resident’s salary income at fixed rate of 20.42% is generally less than the tax rate on resident salary income at progressive ranging from 15% to 56% on the aggregated basis (Chart 4). It is advisable to time taxable event by reference to the net benefit after tax.
Accelerate taxable event before the period of permanent resident
Scope of Japan income tax extends to worldwide income generally in 5 years after the expatriate’s entry into Japan (Chart 3). Non-permanent resident’s foreign source income is not taxable if it is not remitted into nor paid in Japan (Chart 2). When the expatriate has discretion to realize salary outside Japan like exercising employee stock option and has substantial days of overseas business trips, it is likely to be tax preferable for the non-permanent resident employee to trigger such taxable event before change of the taxpayer’s status to a permanent resident, unless the taxpayer expects to leave Japan permanently as addressed in 5 above.
Estimate taxation on stock award across the countries
Taxable event, tax base, tax rate, application of FTC, tax treaty and other relevant tax information should be reviewed to see net benefit after tax at each timing of grant, vesting/exercise and transfer.
Minimize country difference in taxation
Different taxation between countries might result in tax duplication. Answer would include;
(1)	Conclude taxable events in a single country
(2)	Time the taxable event before FTC carry-forward expire
(3)	Adopt alternative remuneration form. Taxation of US and Japan on restricted stock, RSU, Phantom stock is more aligned than stock option’s.
(4)	As the case may be, additional remuneration or tax gross-up should be addressed.
Ata Tax Accountant Office provides wide range of service on planning remuneration policy, administrating payroll, filing tax returns especially for expatriates in Japan, and more tailored to your each condition.