If you are a US citizen or green card holder living outside the United States in 2026, you’ll likely need to file a federal tax return for the 2025 tax year. Even though you live abroad, the United States taxes its citizens and permanent residents on worldwide income. With the right exclusions and credits, however, most expats end up owing little or no US tax.
This 2025 US tax filing guide walks you through what you need to know to file correctly and on time.
Do You Need to File a US Return for 2025?
Yes. If your worldwide income for the 2025 tax year (January 1 – December 31, 2025) exceeds the IRS filing thresholds, you must file a tax return by the applicable deadline in 2026, even if you live overseas.
For 2025, the IRS filing thresholds are:
- $15,750 for single filers
- $31,500 for married filing jointly
- $23,625 for head of household
- $5 for married filing separately with a foreign spouse
- $400 for self-employed taxpayers
These thresholds adjust annually for inflation, so it’s important to check updated figures during each filing season.
Key Forms You Will Likely Need
When filing your 2025 US tax return in 2026, expats often use a combination of forms:
- Form 1040 – Main federal tax return
- Form 2555 – To exclude foreign earned income
- Form 1116 – To claim credits for foreign taxes paid
- Schedule C & SE – If you are self-employed
You may also need additional informational forms if you have foreign assets, businesses, or investments, such as:
- FBAR – Foreign bank account reporting
- Form 8938
- Form 5471
- Form 8865
- Form 8621 (if you hold certain foreign investments)
Missing a required form can lead to penalties, so identifying which apply to you is crucial.
How Expats Avoid Double Taxation
Living abroad often means paying taxes both to the country where you reside and to the US. Fortunately, there are tools in the tax code designed to prevent paying tax twice:
- Foreign Earned Income Exclusion (FEIE) – Allows up to a certain amount of foreign income to be excluded from US tax. For 2025, the FEIE limit is higher than previous years, offering more tax relief for expats.
- Foreign Housing Exclusion – Lets qualifying expats exclude a portion of housing costs.
- Foreign Tax Credit (FTC) – Provides a dollar-for-dollar credit for foreign taxes paid, which may eliminate US tax liability in high-tax countries.
The right strategy depends on where you live and the types of income you earn.
What Income Must Be Reported
Even if you live overseas, virtually all income must be reported to the IRS, including:
- Foreign wages and salaries
- Rental income from foreign property
- Foreign pensions and social security
- Interest, dividends, and investment gains
- Cryptocurrency transactions
Failing to report income can trigger penalties, even if you owe no US tax.
Deadlines for Filing Your 2025 Return
For the 2025 tax year (filed in 2026), key filing dates are:
- April 15, 2026 – Standard filing and payment deadline
- June 15, 2026 – Automatic 2-month extension for expats living abroad on April 15 (automatic; no form needed)
- October 15, 2026 – Extended deadline if you file Form 4868 by your original due date
- October 15, 2026 – FBAR deadline (for FinCEN Form 114)
Planning ahead for these deadlines helps you avoid penalties and interest.
What Happens if You Don’t File
Not filing a required US tax return or foreign reporting form can result in significant penalties, even if you owe $0 in tax. For example, FBAR violations can carry high fines.
If you’ve missed years, programs like the IRS Streamlined Filing Compliance Procedures can help you get back on track, provided your failure to file was non-willful.
FAQs About the 2025 US Tax Filing Guide
1. Do US expats have to file a return for the 2025 tax year?
Yes. If your income exceeds IRS filing thresholds, you must file a US tax return in 2026, even if you live abroad.
2. Does living abroad mean I owe US tax?
Not necessarily. Many expats use the FEIE or FTC to reduce or eliminate US tax, but they still must file.
3. What is the automatic expat extension?
If you live abroad on the regular due date, you automatically get until June 15 to file without needing to request an extension.
4. Can I get more time beyond June 15?
Yes. File Form 4868 by your original deadline to extend your filing to October 15.
5. Do I still have to pay by April 15?
Yes. Extensions give you more time to file, but any tax owed is due by April 15 to avoid interest and penalties.
6. What other reporting requirements do expats face?
Expats with foreign financial accounts usually must file FBAR (FinCEN Form 114), and many also need Form 8938.
7. Can I file late without penalty?
You may be eligible for relief under programs like the Streamlined Filing Compliance Procedures if your late filings were non-willful.
Final Thoughts
Filing your 2025 US tax return as an expat requires careful planning, the right forms, and awareness of deadlines. This 2025 US tax filing guide gives you the foundation you need to prepare with confidence. When in doubt, professional help can save time and reduce stress, especially if you have complex income or foreign assets.
