Earn a paycheck in Dubai, collect dividends from a German company, or run a consulting business out of Singapore, and you can end up with two governments looking at the same income. The country where the money was earned wants its share. So does the IRS, because the United States taxes its citizens and residents on everything they make, anywhere on the planet.
The foreign tax credit exists to keep that overlap from turning into a double bill. It lets qualifying income taxes paid overseas offset what you owe at home — but only within limits, only for certain taxes, and only if the paperwork is right.
Here’s how the rules work heading into the 2026 filing season.
The Basic Idea
A deduction shaves down the income you’re taxed on. A credit cuts the tax bill itself, dollar for dollar. That difference is why the FTC matters so much to anyone with income from abroad.
Say you owe $8,000 in U.S. tax and hold $3,000 of creditable foreign taxes. The credit brings the bill to $5,000. Run the same $3,000 through as a deduction and you’d save only a fraction of that, depending on your bracket.
IRS Publication 514 lays out the mechanics, including the fact that you generally get to choose between crediting your qualifying foreign income taxes and deducting them. For most filers the credit wins easily. The choice applies to all your foreign income taxes for the year, though — you can’t credit some and deduct the rest.
Who Can Use It
U.S. citizens. Moving abroad doesn’t end your filing obligation. Wages, rental income, capital gains, business profits — it all still lands on a U.S. return, even after a foreign tax authority has already taken a cut. For expats, the credit is often the single biggest lever available.
Resident aliens. If you meet the green card test or the substantial presence test, you’re treated much like a citizen here. Foreign taxes paid on income earned while you held resident status can qualify, assuming everything else checks out.
Nonresident aliens. As a rule, no. There are narrow openings — certain Puerto Rico residents, and situations where foreign-source income is effectively connected with a U.S. trade or business — but these are exceptions rather than the norm.
Which Foreign Taxes Actually Count
A payment being mandatory in another country doesn’t make it creditable in this one. The IRS runs every foreign levy through four tests, and it has to pass all of them:
- The tax was imposed on you. Not on your employer, not on a business partner, not on someone else whose bill you happened to settle.
- You paid it or accrued it. Depending on the method you use, either during the tax year in question.
- The liability was legal and real. A payment you weren’t actually obligated to make doesn’t qualify.
- It’s an income tax — or a levy standing in for one. This is where a lot of foreign charges fall out.
Taxes that typically clear all four include foreign income tax withheld from salary, tax on business profits, and withholding on dividends, interest, and royalties. Some countries impose alternatives to an income tax that also qualify under the “in lieu of” standard.
Value-added tax, property tax, customs duties, and most social insurance contributions generally don’t make the cut, since they aren’t income taxes.
Taxes You Can’t Credit
Anything refundable. If the foreign government owes you money back — through a treaty rate, an over-withholding claim, or a refund process you simply never filed for — that amount usually isn’t creditable. The test is what you’re legally liable for, not what left your bank account.
Tax on income you already excluded. This trips up expats constantly. Claim the foreign earned income exclusion and you can’t turn around and credit the foreign tax attached to those same excluded dollars. You have to allocate: only the tax tied to income still showing up on your U.S. return is fair game.
Politically restricted taxes. Levies connected to international boycotts, or paid to countries the U.S. has sanctioned or doesn’t recognize, are off the table.
Certain foreign oil and gas income. Special rules cap what’s creditable here, aimed at levies that function more like royalties than income tax.
The Limitation — Where Most Surprises Happen
You cannot credit more than the U.S. tax attributable to your foreign-source income. Pay $12,000 abroad and you don’t automatically get a $12,000 credit.
The rough formula behind Form 1116:
Credit limit = U.S. tax before credits × (foreign-source taxable income ÷ total taxable income)
A worked example. Your total taxable income is $120,000, of which $40,000 comes from foreign sources. Your U.S. tax before credits is $22,000. Foreign tax paid: $9,000.
- Limit: $22,000 × ($40,000 ÷ $120,000) = $7,333
- Usable this year: $7,333
- Left over: $1,667
That leftover isn’t necessarily lost, but it isn’t reducing this year’s bill either. The pattern is predictable: if the foreign country taxes at a higher effective rate than the U.S. does on the same income, you’ll generate excess credits. Lower-tax jurisdictions rarely produce them.
Deductions allocated against foreign income — a share of the standard deduction, certain interest expense, itemized deductions — reduce the numerator and shrink your limit. It’s a common reason the credit comes out smaller than expected.
Income Categories (the “Baskets”)
Foreign income gets sorted into separate categories, and the limitation is calculated inside each one. Credits don’t cross between them.
Passive category. Interest, dividends, rents, royalties, annuities, and many investment gains. This is where most individual investors live.
General category. The catch-all: salaries, self-employment earnings, most active business income earned abroad.
Foreign branch income. Profits from a qualified business unit operating overseas — a genuine branch, not a separate foreign entity.
Section 951A income. For U.S. shareholders of controlled foreign corporations, tied to the GILTI regime. This one carries its own calculations and forms, and it behaves differently from the others in ways that matter (see below).
The separation is deliberate. It stops taxpayers from using heavy taxes paid on one type of income to wipe out U.S. tax on a lightly taxed type.
What Happens to Unused Credits
Excess credit in a given basket doesn’t just evaporate. You can generally:
- Carry it back one year, and
- Carry it forward up to ten years
Carrybacks come first, and the amount stays locked in its original category the whole time. Passive-basket credits can only ever offset passive-basket limits.
The exception worth knowing: foreign taxes in the Section 951A category can’t be carried back or forward at all. Use them in the year they arise or lose them. For shareholders of CFCs, that turns credit planning into a year-by-year exercise rather than something you can smooth out over time.
When You Can Skip Form 1116
There’s a de minimis election that lets some filers claim the credit straight on Form 1040 without the full schedule. You qualify only if all three conditions hold:
- Every bit of your foreign income is passive category
- The income and taxes appear on a qualified payee statement — a 1099-DIV, 1099-INT, or Schedule K-1
- Total creditable foreign taxes stay at or below $300 ($600 filing jointly)
This is built for the investor whose international exposure runs through a mutual fund or a few ADRs. The tradeoff: take the shortcut and you forfeit any carryover. If you’re sitting close to the threshold with excess credits, filing the full form may be worth the extra effort.
The Forms
Form 1116. The main event for individuals, estates, and trusts. One form per income category, so multiple baskets mean multiple forms.
Schedule B (Form 1116). Your carryover ledger — what came in from prior years, what’s going out to future ones. Skip it and the IRS may not honor a carryforward you’re counting on.
Schedule C (Form 1116). For foreign tax redeterminations, covered below.
Form 1118. Corporations file this instead. It carries its own limitation structure, deemed-paid credit rules under Section 960, and provisions that don’t appear on the individual form.
What’s New for 2026
Section 960(d)(4). A newer provision can disallow part of certain foreign taxes tied to distributions traceable to prior Section 951A inclusions. Its reach is mostly multinational: corporate groups and CFC structures, not the average expat with a salary and a brokerage account.
Expanded Part IV reporting. Recent versions of Form 1116 require entries in Part IV even when you’re only filing a single form — a change that catches people who are working from an older year’s habits. Always pull the instructions for the specific year you’re filing rather than reusing last year’s approach.
Foreign Tax Changes After You File
Foreign tax bills aren’t always final. A refund lands, an audit reopens a year, a dispute gets resolved, or a currency adjustment shifts the number.
When your foreign tax liability changes after the fact, the credit you claimed has to be revisited. Individuals report the correction on Schedule C of Form 1116; corporations follow a separate notification process. Ignoring a foreign refund and leaving the original credit in place is a genuine compliance problem, not a rounding issue.
Errors That Cost Real Money
- Crediting levies that were never income taxes to begin with
- Dropping wage income into the passive basket, or investment income into general
- Assuming every dollar paid abroad is a dollar of credit, and forgetting the limitation
- Converting currency at the wrong rate or the wrong date
- Staying silent about a foreign tax refund received after filing
- Claiming the exclusion and the credit on the same slice of income
- Filing Form 1116 but skipping Schedule B, then losing track of carryovers
Keep the supporting documents: foreign tax returns, withholding certificates, payment receipts, payee statements. Reconstructing this material years later, in another language and another jurisdiction, is not a pleasant project.
The Bottom Line
For anyone with meaningful income from abroad, the foreign tax credit is usually the difference between paying tax once and paying it twice. What it won’t do is guarantee a one-to-one refund of everything you paid overseas — the limitation, the basket rules, and the qualification tests all sit between the tax you paid and the credit you get to use.
