US Expat Tax Guide 2026: FEIE, FBAR, Foreign Tax Credit & Filing Requirements

US Expat Tax Filing in 2026: What Americans Abroad Need to Know

The United States taxes its citizens and permanent residents on worldwide income regardless of where they live — one of only two countries in the world (alongside Eritrea) that uses citizenship-based taxation. If you are a US citizen or green card holder living abroad, you must file a US federal tax return every year your income exceeds the filing threshold, whether you live in London, Singapore, or Bogota.

This guide covers the key tools available to reduce or eliminate double taxation: the Foreign Earned Income Exclusion (FEIE, Form 2555), the Foreign Tax Credit (FTC, Form 1116), and the Foreign Housing Exclusion. It also covers FBAR reporting requirements, FATCA obligations under Form 8938, and when it makes sense to choose the FEIE versus the FTC. All figures reflect 2026 tax year rules.

Why US Citizens Pay Tax No Matter Where They Live

The United States operates a citizenship-based taxation system — one of only two countries in the world that taxes its citizens on worldwide income regardless of where they reside (the other being Eritrea). This means that if you are a US citizen or permanent resident (green card holder), you have a legal obligation to file a US federal income tax return every year, report your worldwide income, and potentially pay US tax — even if you have lived abroad for decades.

This is fundamentally different from the territorial taxation systems used by most other countries, where residents pay tax only on income earned within that country. A German citizen living in the UK only worries about UK tax. A US citizen living in the UK must deal with both UK tax and US tax.

The US tax system does provide significant mechanisms to avoid true double taxation: the Foreign Earned Income Exclusion (FEIE), the Foreign Housing Exclusion, and the Foreign Tax Credit. When used correctly, most expats owe little or no US tax on top of what they pay in their country of residence. But the filing obligation itself never goes away — not filing is a separate legal violation from not paying tax.

Who must file: US citizens (including those born abroad to US citizen parents), lawful permanent residents (green card holders), and in some cases, individuals who spend significant time in the US under the Substantial Presence Test. Relinquishing US citizenship through formal expatriation terminates future filing obligations but triggers an exit tax calculation on the date of expatriation.

FEIE 2026: What It Is, Who Qualifies, and What It Covers

The Foreign Earned Income Exclusion (FEIE) is the primary tool most US expats use to reduce their US tax liability. It allows qualifying US citizens and residents to exclude a set amount of foreign earned income from US federal income tax. For 2025, the exclusion is $130,000. For 2026, the IRS will publish the inflation-adjusted figure, with estimates around $135,000.

Qualifying for the FEIE

To claim the FEIE, you must meet one of two tests:

Physical Presence Test: You were physically present in a foreign country (or countries) for at least 330 full days in any 12-month period that includes part of the tax year. Days in transit through third countries do not always count. The 12-month period need not align with the calendar year — you can use any 12-month period that works for your situation.

Bona Fide Residence Test: You are a bona fide resident of a foreign country for an uninterrupted period that includes a full calendar year (January 1 through December 31). This test is more qualitative — it considers your intent, ties to the country, and whether you have established a real home there, not just a physical presence count. You cannot be a bona fide resident if your intention is always to return to the US at some fixed future date.

What the FEIE Covers — and What It Does Not

The FEIE applies only to foreign earned income: wages, salaries, self-employment income, and professional fees earned for services performed abroad. It does NOT cover:

• Passive income: dividends, interest, rental income, royalties
• Capital gains
• Pension distributions or retirement income
• Income earned from a US employer while physically in the US
• Income paid by the US government (military pay, government salaries)

Passive income is still fully subject to US tax regardless of where you live. Many expats are surprised to find their US brokerage dividends or rental income fully taxable even while claiming FEIE on their salary.

Foreign Housing Exclusion

In addition to the FEIE, qualifying expats can exclude or deduct qualifying housing costs that exceed a base amount (approximately $16,000 in many locations for 2026). Higher base amounts are set by the IRS for expensive cities — London, Tokyo, Zurich, Hong Kong, and others have city-specific higher limits reflecting actual housing costs. Housing costs must be for your primary residence abroad and paid by you or your employer on your behalf.

Foreign Tax Credit: Often Better Than FEIE in High-Tax Countries

The Foreign Tax Credit (FTC) is the alternative to the FEIE for reducing US tax on foreign income. Rather than excluding income, the FTC gives you a dollar-for-dollar credit for income taxes paid to a foreign government. It is claimed on Form 1116.

When the FTC Beats the FEIE

For expats in high-tax countries — the UK, Germany, France, Australia, Canada, the Netherlands, the Nordics — the FTC often produces a better outcome than the FEIE. If your foreign country taxes your income at 30–45% and the US rate on the same income would be 22–35%, the FTC typically covers your entire US tax liability with excess credit to carry forward. In these situations, the FEIE is less useful because: (1) the FEIE only excludes income up to ~$130,000–$135,000, leaving excess income potentially double-taxed if you have no FTC available; (2) excluding income via FEIE means you cannot also apply FTC to that same income.

For expats in low-tax or no-tax jurisdictions — UAE, Bahrain, Cayman Islands, some Middle Eastern countries — the FTC provides less benefit because little or no foreign tax is being paid. The FEIE is often the preferred tool in these situations.

FTC Mechanics

The FTC is limited to the US tax that would have been payable on the foreign income. Excess FTC can be carried back 1 year or carried forward 10 years — a valuable feature if your foreign tax exceeds your US liability in a given year. The FTC must be calculated in separate baskets (foreign branch income, passive income, general income), which adds complexity but prevents manipulation.

Cannot Use Both on Same Income

You cannot claim both the FEIE and the FTC on the same income. Some expats use the FEIE to exclude income up to the exclusion limit and then use the FTC on any remaining income above that limit — a combined strategy that can work well in certain situations. Consult a qualified expat tax professional to determine the optimal approach for your specific income mix and country of residence.

FBAR and FATCA: Reporting Foreign Accounts and Assets

Beyond income tax filing, US persons with foreign financial accounts and assets face two parallel reporting regimes: FBAR and FATCA (Form 8938). Both are informational reporting requirements — they do not create additional tax liability but carry significant civil and criminal penalties for non-compliance.

FBAR (FinCEN 114)

The Report of Foreign Bank and Financial Accounts (FBAR, filed on FinCEN Form 114) must be filed by any US person who has a financial interest in or signature authority over one or more foreign financial accounts with an aggregate value exceeding $10,000 at any point during the calendar year. 'Any point' is critical — if your combined foreign accounts hit $10,001 for even one day in the year, FBAR is required for that year.

The FBAR is filed separately from your tax return, through the FinCEN BSA E-Filing System (not the IRS website). The deadline is April 15, with an automatic extension to October 15 — no request needed. Foreign accounts include bank accounts, investment accounts, brokerage accounts, pensions held abroad, and in some cases interests in foreign entities. Simply having a foreign debit card tied to a foreign bank account can trigger the requirement.

Penalties for non-compliance are severe: civil penalties up to $10,000 per violation for non-willful violations; willful violations can result in penalties up to the greater of $100,000 or 50% of account value per violation, plus potential criminal prosecution. The IRS has pursued FBAR enforcement aggressively since 2010.

Form 8938 (FATCA)

Form 8938 (Statement of Specified Foreign Financial Assets) is filed with your tax return (Form 1040) and reports foreign financial assets above certain thresholds. For US persons filing from outside the US: report if foreign assets exceed $200,000 on the last day of the tax year OR $300,000 at any point during the year. For those filing from within the US, the thresholds are lower: $50,000 on the last day or $75,000 at any point. Note: FBAR and Form 8938 have overlapping but not identical scope — filing both may be required, and filing one does not satisfy the other.

Streamlined Procedures for Late Filers

The IRS offers Streamlined Filing Compliance Procedures for US expats who failed to file due to non-willful non-compliance. The Streamlined Foreign Offshore Procedures allow eligible taxpayers to file 3 years of amended or original returns and 6 years of FBARs with a 5% miscellaneous offshore penalty on the highest aggregate value (or no penalty for the offshore version). This programme provides a practical path to compliance for the many Americans abroad who did not know about these requirements. It cannot be used by taxpayers who were willfully non-compliant or who are already under IRS examination.

Filing Deadlines, Totalization Agreements, and the SE Tax Trap

Several practical considerations apply to US expats beyond the FEIE and FTC strategies.

Filing Deadlines for Expats

US expats receive an automatic 2-month extension to June 15 for filing their federal tax return if they are living and working outside the United States on the regular April 15 due date. No application or Form 4868 is needed to claim this automatic extension — simply attach a statement to your return noting that you qualified for the extension. However, tax owed is still due by April 15. The June 15 extension is for filing only — interest accrues from April 15 on any unpaid balance.

You can request a further extension to October 15 by filing Form 4868 by June 15. Under certain circumstances, an extension to December 15 may be available.

The Self-Employment Tax Trap

US citizens working abroad as freelancers, contractors, or self-employed individuals face a trap that many miss: the FEIE does not reduce self-employment (SE) tax. SE tax is 15.3% on net self-employment income up to the Social Security wage base and 2.9% above it. This tax funds US Social Security and Medicare, and it applies even if your earned income is fully excluded by the FEIE. A freelancer abroad earning $80,000 and claiming full FEIE may owe no federal income tax — but still owes approximately $11,300 in self-employment tax.

Totalization Agreements

The US has Totalization Agreements with 30+ countries to prevent double Social Security taxation. If you are covered by a foreign country's social insurance system and your country has a totalization agreement with the US, you may be exempt from US Social Security (SE) tax on the same income. Countries with US totalization agreements include the UK, Germany, France, Australia, Canada, Japan, South Korea, Italy, Switzerland, and others. Obtain a Certificate of Coverage from the foreign country's social security authority to document your exemption.

State Tax Obligations

Moving abroad does not automatically sever state tax obligations. Some states — particularly California, Virginia, and South Carolina — aggressively assert the right to tax former residents who maintain connections to the state (driver's licence, bank account, family home, professional licences). Formally establishing domicile in your foreign country and severing as many state ties as possible before departure is recommended if you wish to avoid ongoing state tax filings.