The foreign tax
- Country, tax authority and type of tax
- Final assessment and any withholding statements
- Payment or withholding dates
- Refunds, corrections and taxes still unpaid
GUIDE · 2025 FEDERAL RETURN
Foreign tax credit, explained.
When another country taxes income that also goes on your US return, a foreign tax credit may reduce your US income tax. Start with three things: the tax you paid, the income behind it, and the year it belongs to.
General tax education, not personal tax advice. Results and eligibility depend on your facts.
HOW IT WORKS
Three steps from foreign tax to US credit.
Each step depends on the one before it, so work through them in order.
- 1
Identify the tax
Find the foreign tax from the assessment or the payer statement, not from the amount withheld alone.
- 2
Match the income
Tie the tax to the income behind it: its source, its category and the US tax year.
- 3
Apply the credit limit
Work out the limit on Form 1116, where it is required. The credit is generally the smaller of the tax and the limit.
WHICH TAXES QUALIFY
Not every foreign levy is income tax.
The credit is for eligible foreign income taxes, including some taxes imposed in place of an income tax. A deduction shown on a foreign payslip does not settle the question.
- Imposed on you. The tax must be imposed on you, not on someone else.
- Paid or accrued. The tax must have been paid or accrued.
- Your actual legal liability. Withholding is not necessarily the final creditable tax, so keep the assessment and proof of payment.
- On income. Look for tax on wages, interest, dividends or other income.
YOUR OPTIONS
Credit, deduction or exclusion.
Three different ways foreign income and foreign tax can show up on a US return.
| Option | What it does | What to check | Form |
|---|---|---|---|
| Foreign tax credit | Reduces US income tax, subject to eligibility and limits. | Qualifying foreign tax and the income category. | Form 1116 is generally used. |
| Itemized deduction | Reduces the income subject to tax. | You must itemize. Generally you choose a credit or a deduction for all qualified foreign taxes for the year. | Schedule A |
| Foreign earned income exclusion | Excludes qualifying earnings from work abroad, within its limits. | A foreign tax home and qualifying residence or presence conditions. | Form 2555 |
THE CREDIT LIMIT
The smaller of the tax and the limit.
The credit allowed is generally the smaller of your qualifying foreign taxes and the credit limit. The limit relates to the US income tax attributable to your foreign-source taxable income, with adjustments and separate income categories.
Income categories
Salary is commonly general-category income. Interest and dividends are commonly passive-category income. A separate Form 1116 is used for each category that applies, and other business, treaty and special categories have their own rules.
A worked example
A hypothetical case: one income category, no exclusions or other reductions, no carryovers coming in, and a credit limit of $4,000 that has already been calculated correctly.
| Line | Amount |
|---|---|
| Qualifying foreign tax | $5,500 |
| Calculated credit limit | $4,000 |
| Credit allowed (the smaller amount) | $4,000 |
| Unused foreign tax ($5,500 − $4,000) | $1,500 |
What can move the limit
Investment gains, qualified dividends, expenses and losses can change the limit. Tax treaties can affect where income is treated as sourced.
TIMING AND CURRENCY
The right year, the right exchange rate.
A claim can depend on taxes paid or taxes accrued, according to your accounting method and any election. Choosing accrued taxes can affect later returns; it is not a switch to whichever year gives the larger credit. The foreign tax year may also differ from the US calendar year.
Keep original currency figures and a record of how they were converted. Taxes paid generally use the rate on the payment or withholding date; accrued taxes follow different rules, with exceptions. Form 1116 generally reports US-dollar amounts and requires an explanation of the conversion.
The income behind it
- Amount, source and category
- Records of related expenses
- Any income excluded on Form 2555
- Earlier Forms 1116 and carryover schedules
WHAT WE PREPARE
Where ExpatReturn.us fits in.
ExpatReturn.us currently covers eligible current-year 2025 foreign tax credit calculations within a limited federal preparation scope. A guide explaining a tax benefit does not expand the cases the product can prepare.
What the interview asks
Country, category, paid-or-accrued treatment, the tax in its original currency, and the dollar figure where you must supply it.
Income and housing figures in another currency, and an accrued tax, are converted at the IRS yearly average rate. For a tax claimed as paid, you give the dollar figure at the rate on the day paid.
Currency explanation
For an accrued tax converted at the IRS yearly average rate, the product writes and attaches the required explanation.
For a tax claimed as paid and converted by you, it does not: you supply your own explanation as a PDF, and the return is not filed without it. A person you share the return with must also confirm the upload. Entering converted dollars alone does not supply the explanation.
Other tax years
Carryovers of unused foreign tax from up to ten earlier years can be entered, and Schedule B (Form 1116) is prepared from them.
Pay received this year for work done in the United States in another year is US income, not foreign. When the tax is small enough to claim without Form 1116 and unused tax is carried in, both ways are figured and the larger credit is used. Unused tax carried in for the alternative minimum tax that cannot be figured from last year's return is asked for, never assumed.
Not prepared: a carryback of this year's excess to the prior year (an amended return), foreign tax redeterminations, and Schedule C (Form 1116).
Treaty cases
No automatic treaty eligibility advice. The treaty re-sourced category is prepared in limited form only, one Form 1116 per treaty country.
The treaty election itself is not validated, and the product warns that the treaty position and any Form 8833 disclosure are not checked.
What happens to unused foreign tax?
Eligible tax above the limit may generally be carried back one year and then forward for up to ten years, with separate-category rules and exceptions. Carryovers require records and may require Schedule B (Form 1116). They are not an automatic cash refund.
What if the foreign tax is later refunded or changed?
A change can require revisiting the US credit claimed earlier. Keep notices of refunds, revised assessments and additional payments, and do not assume a previously claimed credit stays the same. These redetermination cases are outside the current ExpatReturn.us preparation scope.
Official sources
- IRS: Foreign tax credit overview (opens in a new tab)
- IRS: Which foreign taxes qualify? (opens in a new tab)
- IRS: Credit or deduction (opens in a new tab)
- IRS: How to figure the credit (opens in a new tab)
- IRS: 2025 Form 1116 instructions (opens in a new tab)
- IRS: Credit compliance tips (opens in a new tab)
- IRS: Treaties and special issues (opens in a new tab)
- IRS: Choosing the earned income exclusion (opens in a new tab)
Last reviewed 22 October 2026
This guide is general tax education for the 2025 federal return. Results and eligibility depend on your facts, and it is not personal tax advice. All guides
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