U.S. expat tax · Double-tax relief
Foreign Tax Credit for U.S. Expats
How foreign income tax can offset U.S. tax on the same foreign-source income, what the limitation and income categories do, and how to continue into Form 1116 preparation.
By Danilson Ramos · Founder, Atamatax
Updated August 2026
The Foreign Tax Credit (FTC) is the main U.S. mechanism for reducing double income taxation when a U.S. taxpayer has already paid or accrued qualifying income tax to another country. It does not simply refund the foreign tax. It offsets U.S. tax, subject to a limitation tied to the relevant foreign-source taxable income.
What the credit can address
The underlying levy generally must be a compulsory foreign income tax, or a tax in lieu of an income tax, for which you have the legal liability. VAT, sales tax, wealth tax and most social-security contributions are not automatically foreign income taxes for this purpose. Refundable or avoidable amounts also need separate review.
Why the Form 1116 limitation matters
The credit cannot ordinarily use foreign tax to erase U.S. tax on unrelated U.S.-source income. Form 1116 applies a limitation based on the share of U.S. tax attributable to foreign-source taxable income, and computes that limit separately for categories such as general-category and passive-category income.
Foreign Tax Credit vs the FEIE
The FTC credits qualifying foreign tax. The Foreign Earned Income Exclusion (Form 2555) excludes qualifying earned income, subject to eligibility tests and an annual limit. They can interact, but the same foreign income cannot be both excluded and used as though fully available for the credit. Compare them on the complete return rather than selecting one from the country's headline tax rate.
Map foreign income and tax into the U.S. return
Enter the actual income, foreign tax and residency facts. Atamatax calculates supported Form 1116 and Form 2555 inputs and leaves unsupported sourcing or treaty questions for review.
Authorities cited
- IRC §901 — IRC §901 — Taxes of foreign countries and U.S. possessions
- IRC §904 — IRC §904 — Limitation on the foreign tax credit
- IRS Form 1116 — About Form 1116 — Foreign Tax Credit (Individual, Estate, or Trust)
- IRS Form 2555 — About Form 2555 — Foreign Earned Income (FEIE + housing)
Primary sources (Cornell Legal Information Institute for the US Code and CFR; IRS.gov for forms, procedures, and treaty documents). This page is general information, not individualized tax or legal advice.
Atamatax provides tax preparation support and educational resources. This website does not constitute legal or tax advice.