Foreign Tax Credit for US Expats: Form 1116 Guide

The US taxes its citizens on worldwide income regardless of where they live. If you're also paying income tax to the country where you reside — Germany, the UK, France, Australia — you could end up taxed twice on the same dollars. The Foreign Tax Credit (FTC) is the primary mechanism Congress created to prevent that double taxation. But it comes with a detailed ruleset that's easy to get wrong.

Foreign Tax Credit vs. FEIE: The Core Decision

Most working expats face a binary choice: elect the Foreign Earned Income Exclusion (FEIE) under §911 to exclude up to $132,900 of foreign earned income from US tax (2026 figure¹), or forgo the exclusion and instead claim the FTC for foreign taxes paid. You cannot use both on the same income.

The decision hinges almost entirely on your host country's effective tax rate relative to the US rate:

A critical trap: once you elect FEIE, you cannot claim FTC on the excluded dollars. The IRS does not allow double dipping (IRC §901(a) + §911 coordination). If you're in a low-tax country and FEIE shelters your income, there's no foreign tax to credit anyway — but if you later move to Germany and forget to revoke FEIE, you'll lose the ability to credit German taxes on your earned income for that year.

What Qualifies as a Creditable Foreign Tax?

Not every payment to a foreign government is creditable. The foreign levy must be a compulsory income tax imposed in lieu of or substantially similar to a US income tax. Key rules:

• Must be an income tax — Value Added Tax (VAT), goods and services taxes (GST), customs duties, and payroll contributions (National Insurance in the UK, for example) are generally not creditable.²
• Must be a tax, not a fine or penalty — Surcharges and penalties on delinquent payments don't count.
• Must be a legal and actual liability — You can only credit taxes you actually owe under foreign law, not amounts voluntarily paid above your legal obligation.
• Paid or accrued — You can claim the credit in the year paid (cash basis) or in the year accrued (accrual basis). Most individual filers use cash basis.

Some countries impose withholding taxes on dividends or interest paid to non-residents. These are generally creditable, but only up to any applicable treaty rate — excess withholding above the treaty-reduced rate is typically not creditable without a refund claim filed in the withholding country.

Income Baskets: Why You File Multiple Forms 1116

The FTC limitation operates separately for each income category (often called "baskets"). You cannot net excess credits from one basket against insufficient credits in another. For individual filers, the relevant baskets are:³

• General income basket — wages, salary, self-employment income, pensions, and any income that doesn't fit the other categories. Most expat earned income goes here.
• Passive income basket — dividends, interest, capital gains on investment property, rents, royalties, and annuities. Foreign mutual fund distributions typically fall here (PFIC rules can complicate this further).
• Foreign branch income basket — business profits of a US person attributable to one or more Qualified Business Units (QBUs) in foreign countries. Relevant if you operate a foreign branch, not a foreign corporation.
• Section 951A (GILTI) basket — primarily relevant for US shareholders of controlled foreign corporations. Most individual expats without a foreign corporation structure won't encounter this.
• Treaty-resourced income — income that a US tax treaty treats as foreign-source when it would otherwise be US-source under domestic rules. Relatively rare in practice.

In practice, most employed expats file one Form 1116 for general income (their salary taxed by the host country) and potentially a second for passive income (dividends from a foreign brokerage). Self-employed expats with a foreign branch may need a third.

The FTC Limitation Formula (§904)

The §904 limitation prevents you from using foreign taxes to offset US tax on US-source income. The formula is:

Example: You are a US citizen in Germany earning $200,000 of wages. Germany withholds €78,000 (~$86,000). Your total worldwide income is $200,000, all from Germany. US tax before credits (assume 32% bracket) is roughly $42,000. Your FTC limit is:

$42,000 × ($200,000 / $200,000) = $42,000

The credit is limited to $42,000 even though German taxes were $86,000. The excess $44,000 of German tax cannot be credited this year — but it can be carried over.

The formula gets more complex when you have US-source income mixed with foreign income. If you also earned $50,000 of US consulting income:

FTC Limit = US Tax × ($200,000 / $250,000) = 80% of US tax

The remaining 20% of your US tax bill is protected from being offset by foreign credits, because that tax corresponds to your US-source income.

The High-Tax Kickout Rule

The high-tax kickout rule moves passive income out of the passive basket and into the general basket when the effective foreign tax rate on that passive income exceeds the highest US individual rate (currently 37%).⁴

When does this matter? Consider a UK resident earning rental income from a property in France. French rental income might be subject to a 30–45% marginal rate. That effective rate exceeds 37% — so the French taxes on that rental income are "kicked out" of the passive basket and reassigned to the general basket.

Why does the basket assignment matter? General-basket credits are easier to utilize because expat earned income typically generates large general-basket credits in high-tax countries. Excess passive-basket credits are often stranded and must be carried over separately. The high-tax kickout is actually favorable for taxpayers — it helps them use credits that would otherwise sit unused in the passive basket.

Carryover and Carryback Rules (§904(c))

If your foreign taxes exceed the §904 limit in a given year (common for expats in high-tax countries), you have unused FTCs. You can:

• Carry back 1 year — file an amended return (Form 1040-X) for the prior year to apply the unused credits. This generates an immediate refund if you had US tax that year. Carryback requires amending a prior-year return and is rarely worth it unless the refund is material.
• Carry forward 10 years — unused credits automatically carry forward in the same income basket to the next 10 tax years. Credits that remain unused after 10 years expire permanently.²

The most common scenario: a US citizen in Germany accumulates large excess general-basket FTC carryforwards during years of high German income, then draws them down in a later year when they return to the US or earn more US-source income (which increases the §904 FTC limit for that year).

Track your FTC carryforwards on Schedule B of Form 1116 every year, even in years when you don't owe US tax. Losing track of carryforwards is a costly error — you may later discover expiring credits you could have used.

FTC and the Alternative Minimum Tax (AMT)

The regular FTC from Form 1116 cannot be used to offset the Alternative Minimum Tax. For AMT purposes, you must calculate a separate AMT Foreign Tax Credit using Form 8801. The AMT FTC limitation is calculated under the same §904 framework but applied against AMT income — which uses different preferences and adjustments than regular income.

Expats in very high-tax countries who have significant US-source income may still owe AMT even after the regular FTC wipes out their regular US tax. If you're generating large FTC carryforwards from Form 1116, confirm with your advisor that AMT isn't creating a residual US liability.

Practical Scenarios by Country

Germany (income tax ~40–45%)

German income tax (Einkommensteuer) plus solidarity surcharge typically produces an effective rate of 35–45% on professional income. This almost always exceeds the US marginal rate for the same income level. Result: FTC generally reduces US tax to zero on German-sourced earned income, with excess credits carried forward. Choose FTC over FEIE. Note: the German solidarity surcharge (Solidaritätszuschlag) was significantly reduced in 2021 for most taxpayers — verify your actual effective rate, as it's lower than the headline rate for mid-income earners.

France (income tax ~30–45%, CSG/CRDS social charges)

France imposes income tax plus mandatory social contributions (CSG/CRDS). A key question: are CSG/CRDS creditable as foreign income taxes? The US–France tax treaty explicitly covers CSG/CRDS, making them creditable for treaty purposes — but the treaty savings clause can complicate this for US citizens. This is a specialized area where an expat advisor who knows the US–France treaty is essential.

United Kingdom (income tax 20–45%, National Insurance)

UK income tax at 40% above ~£50,000 (basic rate 20% up to that) creates a variable picture. National Insurance contributions are not creditable (not income taxes). For most employed US expats in the UK earning £80,000+, UK income tax exceeds the US rate — FTC usually wins. For lower earners, FEIE may be comparable. The FEIE vs FTC calculator handles this comparison.

Singapore (income tax 0–24%) and UAE (0% income tax)

Singapore's effective income tax rate is well below US rates for most expat income levels. UAE has no personal income tax. FEIE is almost always better in these jurisdictions — there's minimal foreign tax to credit, so the exclusion provides a direct shelter. Using FTC in a zero-tax country produces zero credits.

Canada (income tax ~33% federal + provincial)

Canada has a US tax treaty. Canadian federal + provincial taxes combined often approach or exceed US rates for high earners. Many US expats in Canada use FTC on federal taxes. The US–Canada treaty also provides treaty tiebreaker rules relevant to dual-residents. Canada-specific advice requires expertise in the treaty's interaction with the FTC.

Filing Form 1116: Common Mistakes

• Putting earned income in the passive basket. Wages are general income, not passive income, even if paid by a foreign employer. The basket determination follows US tax rules, not foreign law.
• Failing to track carryforwards. Schedule B of Form 1116 carries over unused credits by basket. Many expats who are US-tax-zero for several years stop filing Form 1116 and lose their carryforward history.
• Claiming FTC on FEIE-excluded income. If you've elected FEIE, you cannot claim FTC on the excluded portion. The IRS will disallow credits applied to excluded dollars.
• Using the simplified limitation election incorrectly. There's a simplified one-basket calculation election available when all FTC income is in the passive basket. It's only valid if you have no general-basket FTC — many filers use it incorrectly when they have both types of income.
• Ignoring the high-tax kickout when calculating the limit. Failing to apply the kickout can result in passive-basket credits that look unused when they would in fact qualify for the general basket — reducing your apparent carryforward.
• Crediting non-creditable taxes. VAT, GST, UK National Insurance, and social taxes that aren't income taxes are not creditable. Including them on Form 1116 and getting caught in examination can result in penalties.

A Note on OBBBA and 2026 FTC Changes

The One Big Beautiful Bill Act (OBBBA, P.L. 119-21, July 2025) made several international tax changes effective for tax years beginning after December 31, 2025 — primarily targeted at corporate shareholders of controlled foreign corporations (GILTI haircut reduction, NCTI deduction allocation, PTEP distribution rules). Individual US expats filing Form 1116 on their own wages and investment income are not materially affected by the OBBBA's FTC provisions. The core §901/§904 framework — baskets, limitation formula, carryover rules, high-tax kickout — is unchanged for individuals.⁵