Deductions and Credits · Credits

Foreign tax credit

The foreign tax credit is not a matter of subtracting what a foreign country charged. It is an election, followed by a ratio, applied separately in four categories, with anything unusable carried one year back and ten forward. Most individual returns claiming it involve a few hundred dollars of withholding on mutual fund dividends, and for those there is an election that dispenses with the whole apparatus — but only if the taxpayer knows to make it, and only at a price.

The rule

It is an election, and it is all or nothing. The credit is allowed only if the taxpayer chooses the benefits of subpart A, and that choice may be made or changed at any time before the refund claim period expires for the year (IRC § 901(a)). all or nothing for the year — IRC § 275(a)(4) denies any deduction for foreign income taxes if the taxpayer chooses the credit to any extent, and the choice may be made or changed at any time within the refund claim period under § 901(a)^TY2026Verified 2026-08-19IRC §§ 275(a)(4) and 901(a), read at law.cornell.edu/uscode/text/26/275 and /901 So a taxpayer cannot credit some foreign income taxes and deduct others in the same year — the choice binds the whole year, though not adjacent years.

What is creditable. Income, war profits and excess profits taxes paid or accrued to a foreign country or a US possession (IRC § 901(b)(1) for a citizen or domestic corporation). Section 903 extends the term to a tax paid in lieu of an income tax otherwise generally imposed — which is how many gross withholding taxes on dividends and royalties become creditable at all.

The limitation. the credit cannot exceed the same proportion of the US tax as foreign source taxable income bears to entire taxable income — computed without any deduction for personal exemptions, and with foreign source capital gain counted only to the extent of foreign source capital gain net income (IRC § 904(a), (b)(1), (b)(2)(A))^TY2026Verified 2026-08-19IRC § 904, read at law.cornell.edu/uscode/text/26/904 Read the ratio the way it is drafted: the numerator is foreign source taxable income, the denominator is entire taxable income, and the product is applied to the US tax. Because taxable income is used rather than gross income, deductions allocable to foreign source income shrink the numerator and so shrink the credit.

Four separate limitations. The subsection is applied separately to four separate limitations — net CFC tested income includible under IRC § 951A other than passive category income, foreign branch income, passive category income, and general category income (IRC § 904(d)(1)(A)–(D))^TY2026Verified 2026-08-19IRC § 904(d), read at law.cornell.edu/uscode/text/26/904. Separate application means excess credits in one basket cannot shelter US tax on income in another. For an individual return, almost everything falls into passive category income — dividends, interest, rents and royalties of the kind that would be foreign personal holding company income under § 954(c) — or into general category income, which § 904(d)(2)(A)(ii) defines as everything that is not one of the other three.

Carryover. Foreign taxes exceeding the limitation are one year back and ten years forward, in that order, usable only as a credit and never as a deduction, and only for a year in which the taxpayer elects the credit (IRC § 904(c))^TY2026Verified 2026-08-19IRC § 904(c), read at law.cornell.edu/uscode/text/26/904. The order is fixed: back one year first, then forward, earliest year first. The carryover stays inside its basket.

The de minimis election. An individual may elect out of the limitation entirely where creditable foreign taxes of $300, or $600 on a joint return, where all foreign source gross income is qualified passive income shown on a payee statement — the taxpayer elects out of the § 904(a) limitation entirely, and forfeits any carryback or carryover for that year (IRC § 904(j))^TY2026Verified 2026-08-19IRC § 904(j), read at law.cornell.edu/uscode/text/26/904 (IRC § 904(j)(1), (2)). Qualified passive income means passive income shown on a payee statement — in practice a Form 1099-DIV or 1099-INT (IRC § 904(j)(3)(A)). The election is what allows the credit to be taken directly on Form 1040 without a Form 1116. The price is in § 904(j)(1)(B) and (C): no carryback or carryover into or out of that year, so any excess is simply lost.

The dividend holding period. no credit for a withholding tax on a dividend where the stock was held for 15 days or less within the 31-day period beginning 15 days before the ex-dividend date, or where the recipient is obliged to make related payments on substantially similar property (IRC § 901(k)(1))^TY2026Verified 2026-08-19IRC § 901(k), read at law.cornell.edu/uscode/text/26/901 The rule exists to stop a taxpayer buying a foreign stock immediately before its ex-dividend date purely to acquire a creditable withholding tax.

A longer period to claim. ten years from the due date of the return for the year in which the foreign taxes were actually paid or accrued, in place of the ordinary three years (IRC § 6511(d)(3)(A))^TY2026Verified 2026-08-19IRC § 6511(d)(3)(A), read at law.cornell.edu/uscode/text/26/6511 (IRC § 6511(d)(3)(A)). This is a genuinely practical point: a foreign tax finally determined years after the fact can still be credited on an amended return long after the ordinary period for that year has closed.

Where the credit does not run. Section 901(j) denies the credit altogether for taxes paid to a country whose government the United States does not recognise, has severed diplomatic relations with, or which the Secretary of State has designated as repeatedly providing support for acts of international terrorism, and requires income from that country to be limited separately.

Current figures

How it works in practice

Decide credit or deduction first. The credit is usually better because it reduces tax dollar for dollar while a deduction reduces income — and since 2018 the deduction route is unavailable to most individuals anyway, because foreign income taxes are deductible only as an itemized deduction under § 164(a)(3) and most taxpayers take the standard deduction. Where the limitation would waste most of the credit and the taxpayer itemizes, the deduction can still win.

Then test the de minimis election. Two questions: is all foreign source gross income passive and reported on a payee statement, and are the creditable taxes within the dollar ceiling? If both are yes, the election gives the full credit with no Form 1116 and no ratio computation. It is the right answer for the ordinary client holding an international index fund.

Otherwise compute the ratio, basket by basket. Allocate income to baskets, allocate deductions to that income, and compute foreign source taxable income for each. The limitation is separate for each basket, so a taxpayer can have unusable credits in one basket while paying full US tax in another.

Then handle the excess. Carry back one year and forward ten, within the basket. Track it: the carryforward is a real asset and a common casualty of a change of preparer.

Two computational traps sit inside the ratio. Personal exemptions are ignored in computing taxable income for this purpose (IRC § 904(b)(1)), which no longer changes the arithmetic but still appears in questions. And foreign source capital gain enters the numerator only to the extent of foreign source capital gain net income (IRC § 904(b)(2)(A)), so a taxpayer with foreign capital losses cannot inflate the numerator with gross gains.

How this has changed

Pub. L. 119-21 made two amendments to § 904 with effect for taxable years beginning after 31 December 2025. Section 70311(a) added § 904(b)(5), which for the purposes of the limitation on the § 951A basket alone allocates the § 250(a)(1)(B) deduction and any § 164(a)(3) tax deduction on that income to that income, allocates no interest expense or research and experimental expenditure to it, and allocates any other deduction only if directly allocable — pushing everything else to US source income. Section 70313(a) added § 904(b)(6), a source rule treating a portion of income from inventory produced in the United States and sold through a foreign branch office as foreign source. Section 70311(b) made conforming cross-reference changes within § 904(d).

Both are aimed at the international corporate regime rather than at individual returns, and neither touches the § 904(a) ratio, the § 904(c) carryover or the § 904(j) election that an individual return actually turns on. They are noted here because a reader checking § 904 for currency will see the 2025 amendment notes and should know what they cover.

Two older changes still shape the topic. The categories in § 904(d)(1) have included a foreign branch basket and a § 951A basket since 2017, so a source describing only a passive basket and a general basket is pre-2018. And since 2018 foreign income taxes reach an individual’s return as a deduction only through itemizing, which has made the credit the practical default rather than a considered choice.

Exam focus

Know the shape before the detail: elect, limit by ratio, apply separately by basket, carry back one and forward ten. Be able to compute the § 904(a) limitation from a set of figures — it is the most likely computational question, and the trap is using gross income rather than taxable income in the numerator.

Know the de minimis election cold: passive income only, shown on a payee statement, taxes within the dollar ceiling, no Form 1116, and no carryover in either direction. That is the fact pattern most individual returns present.

Know that the credit and the deduction are mutually exclusive for a year, that only income taxes and § 903 in-lieu-of taxes qualify, and that the period for claiming a refund attributable to foreign taxes is ten years rather than three.

Check yourself

1. A single taxpayer’s only foreign income is $2,900 of dividends from a foreign mutual fund reported on Form 1099-DIV, with $265 of foreign tax withheld. What is the simplest correct treatment?

Answer: Elect under IRC § 904(j). All foreign source gross income is qualified passive income shown on a payee statement and the tax is under the $300 single-filer ceiling, so the § 904(a) limitation does not apply and the full $265 is credited without a Form 1116. The cost is that no carryback or carryforward is available for that year.

2. A taxpayer with US tax of $40,000, entire taxable income of $200,000 and foreign source taxable income of $25,000 paid $8,000 of foreign tax. What is credited this year?

Answer: $5,000. The IRC § 904(a) limitation is $40,000 multiplied by the ratio of $25,000 to $200,000. The remaining $3,000 carries back one taxable year and then forward up to ten under § 904(c), within the same basket.

3. Why can a taxpayer with unused credits in the passive basket not apply them against US tax on general category income?

Answer: Because IRC § 904(d)(1) applies subsections (a), (b) and (c) separately to each category. The separate application governs the carryback and carryforward as well, so the excess stays in the passive basket for its whole life.

4. A taxpayer paid $4,000 of foreign income tax and also paid a foreign value added tax of $900 on purchases. What is creditable?

Answer: The $4,000 only. IRC § 901(b) allows a credit for income, war profits and excess profits taxes, and § 903 extends that only to a tax paid in lieu of an income tax otherwise generally imposed. A value added tax is neither, so it is not creditable — though it may be deductible if it is a business expense.

5. A taxpayer deducted foreign income taxes on an original return and now wants the credit instead, four years later. Is it too late?

Answer: No. IRC § 901(a) allows the choice to be made or changed at any time before the refund claim period expires, and § 6511(d)(3)(A) gives ten years from the due date of the return for the year the taxes were paid or accrued. Switching also triggers § 275(a)(4), so the deduction must be given up entirely for that year.