Foreign Tax Credit vs Deduction in 2026

A credit subtracts foreign income tax from US tax dollar for dollar; a deduction only reduces taxable income, and only if you itemize. Section 275(a)(4) makes the choice all or nothing for the year, so taking the credit on any foreign tax forfeits the deduction on all of it. Unused credit carries over; a deduction does not.

Is the foreign tax credit or the deduction worth more?

Publication 514 states that in most cases a credit gives a greater benefit than a deduction, and its own example puts a figure on the gap. A couple filing jointly with $130,000 of adjusted gross income, $20,000 of it foreign dividends, and $1,900 of foreign tax paid, owe $10,086 if they deduct that tax and $8,414 if they credit it — $1,672 apart on identical facts.

Three things sit behind the gap. A credit reduces the tax itself rather than the income the tax is figured on. It is open to anyone, itemizing or not, so the standard deduction stays available alongside it. And foreign tax above the year’s credit limit carries to another year, which a deduction never does.

The deduction keeps a narrow role. It is the only route for foreign taxes that are not income taxes at all — foreign real and personal property taxes among them — and those stay deductible even in a credit year where they are expenses of a trade or business or of producing income.

Where does each one go on the return?

The credit is figured on Form 1116 and carried to Schedule 3 (Form 1040), Part I, line 1. The deduction goes on Schedule A (Form 1040), line 6, Other Taxes — the line reserved for income taxes paid to a foreign country and the generation-skipping transfer tax on certain income distributions.

The line matters. The state and local tax limit, $40,000 or $20,000 filing separately on the 2025 Schedule A, applies to the taxes entered on lines 5a, 5b and 5c. Foreign income taxes are not among them, so that limit leaves them alone.

Two traps sit beside it. Foreign personal and real property taxes appear on the Schedule A list of taxes that cannot be deducted at all. And anyone who files Form 2555 works the State and Local Tax Deduction Worksheet rather than entering a figure straight on line 5e.

When can the credit be claimed without filing Form 1116?

An election in the Form 1116 instructions lets some filers claim the credit on Schedule 3 alone. It is open where all foreign source gross income is passive category income, where that income and its tax were reported on a qualified payee statement such as Form 1099-DIV, and where total creditable foreign taxes come to no more than $300, or $600 on a joint return.

The election is closed to estates and trusts. Making it switches off the limitation at lines 15 through 23, and the figure entered on the return is the smaller of total foreign tax or regular tax.

It costs something. No foreign tax paid or accrued in an election year carries to or from any other year, though carryovers between other years are untouched, and the reduction for tax on excluded income still applies.

How does Form 1116 limit the credit?

The limit is US tax multiplied by the share of taxable income that came from abroad. Line 19 divides net foreign source taxable income by worldwide taxable income, line 21 applies that fraction to the tax on line 20, and line 24 takes the smaller of the foreign tax available for credit or the limit so figured.

That fraction is why a high foreign rate does not convert into a full credit. Where foreign tax exceeds the US tax attributable to foreign source income, the excess is not creditable in the current year however much was paid.

One Form 1116 is filed for each category of income. The 2025 form carries seven boxes: section 951A, foreign branch, passive, general, section 901(j), certain income re-sourced by treaty, and lump-sum distributions. Tax in one category never relieves US tax in another.

Why do the standard deduction and Form 2555 both shrink the credit?

Both cut the top of the limitation fraction. Line 3a of Form 1116 takes the standard deduction where the filer does not itemize, and lines 3d to 3g apportion it by the ratio of gross foreign source income to gross income from all sources, lowering foreign source taxable income and with it the limit.

Form 2555 bites harder. Line 12 strips out foreign tax allocable to income excluded under the foreign earned income or foreign housing exclusion, and Publication 514 is flat about it: neither a credit nor a deduction is available for foreign taxes paid on excluded income.

Where only part of the income is excluded, the instructions set the fraction — excluded foreign earned income and housing amounts less allocable deductible expenses, over total foreign earned income less allocable deductible expenses including the housing deduction.

What happens to foreign tax the limit will not absorb?

Section 904(c) deems the excess paid in the first preceding tax year and then in any of the first 10 succeeding years, in that order. The earliest year it can reach takes it first, and the period is not extended where an intervening year had no room.

The carryover runs category by category, and section 951A category income generates none at all — line 10 stays blank on a Form 1116 for that category. Schedule B (Form 1116) reconciles the prior-year carryover with the current-year one.

A deduction year breaks the chain. Publication 514 works it through: on $600 of foreign tax paid in 2025, a $200 carryover from 2024 and a $700 limit, the credit comes to $700 with $100 carried to 2026, while the deduction is capped at the $600 actually paid.

Which foreign taxes do not qualify for the credit?

Only the legal and actual foreign tax liability paid or accrued qualifies, and that is not always the amount withheld. Where it is reasonably certain an amount would be refunded, credited, rebated or forgiven on a claim, no credit is available for it.

Treaty rates are the common case. Publication 514 describes treaty countries that require US citizens and residents to pay tax figured without the lower treaty rate and then claim the excess back. The qualified foreign tax is the amount at the treaty rate, not the amount paid, because the difference is refundable.

Creditability itself turns on two conditions. A foreign levy is an income tax only where it is a tax — paid with no specific economic benefit in return — and is either a net income tax or a tax in lieu of one under section 903. A levy funding retirement, unemployment, illness or disability benefits is not treated as buying a specific economic benefit where its amount does not turn on the individual’s age or life expectancy.

What the Portugal and Spain treaties change

Both treaties re-source income so the credit can reach it. Article 25(2) of the 1994 US-Portugal convention and Article 24(3) of the 1990 US-Spain convention deem income the United States may tax solely by reason of citizenship to arise in the other country, to the extent needed to avoid double taxation, provided the US tax paid is not less than it would be were the individual not a US citizen.

That reaches US-source income — a dividend, interest, a pension — taxed by Portugal or Spain on a resident American. Re-sourced income normally goes in box f of Form 1116 and takes a separate form for each amount from each treaty country, with Form 8833 sometimes required.

The citizen relief rules are the exception to that separate-form requirement. The instructions state it does not apply to income re-sourced by a relief-from-double-taxation rule applicable solely to US citizens who are residents of the foreign treaty country, which is exactly what Article 25(2) and Article 24(3) are.

Sources

1. Internal Revenue Service — Instructions for Form 1116 (2025) — https://www.irs.gov/pub/irs-pdf/i1116.pdf — checked 12 October 2026
2. Internal Revenue Service — Form 1116, Foreign Tax Credit (2025) — https://www.irs.gov/pub/irs-pdf/f1116.pdf — checked 12 October 2026
3. Internal Revenue Service — Publication 514, Foreign Tax Credit for Individuals (for use in preparing 2025 returns) — https://www.irs.gov/pub/irs-pdf/p514.pdf — checked 12 October 2026
4. Internal Revenue Service — Instructions for Schedule A (Form 1040) (2025) — https://www.irs.gov/pub/irs-pdf/i1040sca.pdf — checked 12 October 2026
5. Internal Revenue Service — Foreign tax credit — https://www.irs.gov/individuals/international-taxpayers/foreign-tax-credit — checked 12 October 2026
6. Internal Revenue Service — Foreign taxes that qualify for the foreign tax credit — https://www.irs.gov/individuals/international-taxpayers/foreign-taxes-that-qualify-for-the-foreign-tax-credit — checked 12 October 2026
7. US Government Publishing Office — 26 U.S.C. 901, Taxes of foreign countries and of possessions of the United States — https://www.govinfo.gov/content/pkg/USCODE-2023-title26/html/USCODE-2023-title26-subtitleA-chap1-subchapN-partIII-subpartA-sec901.htm — checked 12 October 2026
8. US Government Publishing Office — 26 U.S.C. 904, Limitation on credit — https://www.govinfo.gov/content/pkg/USCODE-2023-title26/html/USCODE-2023-title26-subtitleA-chap1-subchapN-partIII-subpartA-sec904.htm — checked 12 October 2026
9. US Government Publishing Office — 26 U.S.C. 164, Taxes — https://www.govinfo.gov/content/pkg/USCODE-2023-title26/html/USCODE-2023-title26-subtitleA-chap1-subchapB-partVI-sec164.htm — checked 12 October 2026
10. US Government Publishing Office — 26 U.S.C. 275, Certain taxes — https://www.govinfo.gov/content/pkg/USCODE-2023-title26/html/USCODE-2023-title26-subtitleA-chap1-subchapB-partIX-sec275.htm — checked 12 October 2026
11. Internal Revenue Service — Convention between the United States of America and the Portuguese Republic, signed 6 September 1994, Article 25 — https://www.irs.gov/pub/irs-trty/portugal.pdf — checked 12 October 2026
12. Internal Revenue Service — Convention between the United States of America and the Kingdom of Spain, signed 22 February 1990, Article 24 — https://www.irs.gov/pub/irs-trty/spain.pdf — checked 12 October 2026