Best Tax Tips for U.S. Citizens Living Abroad

Most expat tax problems are not about owing money. They come from a return or an account report that was never filed because nothing seemed to be owed. The tips below are drawn from IRS and FinCEN guidance for tax years 2025 and 2026. They are general; the right answer for your return depends on your facts. For the underlying rules, start with our international tax overview.

1. 01

   File even when you expect to owe nothing

   Best for: Anyone who assumes foreign tax paid means there is nothing to file

   The IRS says the rules for filing income tax returns and paying estimated tax are generally the same whether you are in the United States or abroad, and that you are taxed on worldwide income. Benefits such as the foreign earned income exclusion are only available if you file a U.S. return. Filing and owing are separate questions.

   • Worldwide income is reportable wherever it is paid or kept
   • The exclusion does not apply by itself; it is claimed on a return
   • A second passport does not end the obligation
   Read more →
2. 02

   Use the June 15 extension, but pay by April 15

   Best for: Citizens and residents living outside the U.S. and Puerto Rico on April 15

   You get an automatic two-month extension to June 15 if you live outside the United States and Puerto Rico on the regular due date. Attach a statement to the return saying which situation qualified you. Interest is still charged on any tax not paid by April 15, so estimate and pay any balance on time.

   • Automatic; claimed with a statement on the return
   • Form 4868 by June 15 extends further to October 15
   • Interest runs from April 15 on unpaid tax
3. 03

   Add up every foreign account for the FBAR

   Best for: Anyone with several modest foreign accounts

   An FBAR is required when the aggregate value of your foreign financial accounts exceeded $10,000 at any time during the calendar year. That is a high-water mark across all accounts, including ones you can sign on but do not own. It is filed with FinCEN through the BSA E-Filing System, not with your return.

   • Aggregate, not per account
   • Highest balance during the year, not the year-end balance
   • Due April 15, automatic extension to October 15
   Read more →
4. 04

   Check Form 8938 separately

   Best for: Expats with larger balances, foreign securities or interests in foreign entities

   Form 8938 is an IRS form attached to your return, with its own thresholds that are considerably higher for people who qualify as living abroad. It covers specified foreign financial assets, which can include foreign securities held outside an account. Filing an FBAR does not satisfy it, and the same account can belong on both.

   • Due with the return, including extensions
   • Thresholds depend on filing status and whether you live abroad
   • Penalty of up to $10,000 for failure to disclose
   Read more →
5. 05

   Choose between the exclusion and the credit on purpose

   Best for: Anyone in a first or second year abroad

   The foreign earned income exclusion (Form 2555) removes a capped amount of foreign earned income from U.S. tax; the foreign tax credit (Form 1116) offsets U.S. tax with foreign tax you actually paid. You cannot claim a credit for tax on income you have excluded, and an exclusion election carries into later years until revoked. Model both before the first return, and check the current year's exclusion limit on the IRS site.

   • The exclusion reaches earned income only
   • No credit on excluded income
   • The election is sticky across years
   Read more →
6. 06

   Remember self-employment tax

   Best for: Freelancers, consultants and business owners abroad

   The IRS says self-employment tax rules are generally the same abroad. The foreign earned income exclusion reduces income tax but not self-employment tax, which is figured on all your self-employment income. If you are covered by a foreign social security system under a totalization agreement, get a certificate of coverage from that country and attach a copy to Form 1040 each year you are exempt.

   • Exclusion does not reduce SE tax
   • Totalization agreements can assign coverage to one country
   • Certificate of coverage attached every exempt year
7. 07

   Keep a day count and a residence file

   Best for: Anyone relying on the physical presence or bona fide residence test

   The exclusion depends on meeting the bona fide residence test or being physically present abroad for 330 full days in a 12-month period. Keep travel dates, boarding passes and residence documents as you go rather than reconstructing them later. If you will only meet a test after the return is due, Form 2350 lets you wait.

   • 330 full days in 12 consecutive months for physical presence
   • Form 2350 extends time to meet a test
   • Records made at the time are far easier to defend
8. 08

   Convert to dollars carefully

   Best for: Anyone paid, taxed or banking in another currency

   Publication 54 requires amounts on a U.S. return to be expressed in U.S. dollars, translating foreign-currency income and expenses. Keep the local-currency figures, the rate you used and its source. For the FBAR and Form 8938, it is the maximum value during the year that gets converted, not the year-end balance.

   • Keep original-currency statements
   • Record the rate and date used
   • Consistency across years avoids questions
9. 09

   Look hard at foreign funds, gifts and trusts

   Best for: Expats holding foreign mutual funds or pensions, or receiving family gifts from abroad

   Some foreign holdings bring their own information returns. U.S. shareholders of a passive foreign investment company, which can include many foreign mutual funds, may need Form 8621. Large gifts or bequests from foreign persons and dealings with foreign trusts can require Form 3520. These carry penalties separate from the return, and they are where specialist review is worth the time.

   • Form 8621 for certain PFIC distributions, sales and elections
   • Form 3520 for large foreign gifts and foreign trust transactions
   • Foreign pensions need case-by-case review
10. 10

    Settle the state question and fix gaps early

    Best for: Former South Carolina residents and anyone with unfiled years

    Leaving the country is not automatically leaving a state for tax purposes, and a state may not honor the federal exclusion or credit. If returns or FBARs were missed, the IRS Streamlined Filing Compliance Procedures offer a route for taxpayers who can certify that the failure was non-willful. Which route fits is a facts question, and if willfulness is in doubt the first call should be to a tax attorney.

    • State domicile can survive years abroad
    • Streamlined requires a non-willful certification
    • Do not quietly file late forms without choosing a route
    Read more →

The information on this site is general in nature and is not tax, legal, or accounting advice for your situation. Tax law changes and the right answer depends on facts we would need to review with you. Please speak with a qualified professional before acting on anything you read here.

Keep reading

• Best International Tax CPAs for U.S. Expats (2026)Haigler CPA Group's 2026 list of tax firms for Americans abroad, covering expat returns, FBAR and FATCA reporting and catch-up filings, and how to choose one.
• Key FBAR and FATCA Deadlines for ExpatsFBAR, Form 8938, the June 15 expat extension, Form 4868, Form 2350 and Form 3520 dates for U.S. citizens abroad, with the 2026 and 2027 calendar dates.
• Best Ways to Reduce Self-Employment TaxSeven legitimate ways to lower self-employment tax in 2026, from business deductions and depreciation to an S corporation election, and what does not help.
• International tax guidesFiling from abroad, FBAR and Form 8938, and moving back.
• Form 1116 vs. Form 2555Form 2555 excludes a capped amount of foreign earned income from U.S. tax. Form 1116 credits foreign income tax you actually paid against your U.S. liability. They relieve double taxation differently, they reach different kinds of income, and you cannot take a credit for tax on income you have excluded. Which is better depends entirely on your facts.
• Returning to the U.S.: a tax checklistReturning to the United States does not change whether you file — a citizen was already filing — but it changes almost everything about how. The year of the move can split into two periods with different rules, the foreign earned income exclusion is prorated or lost, and the Form 8938 thresholds drop sharply once you no longer live abroad.
• Personal Tax1040 preparation, tax-saving strategy, and multi-state or expatriate filings.
• All Charleston tax & accounting guidesEvery list, choosing a CPA and the tax reference lists.