U.S. Tax Filing Deadlines for Americans Living at Home and Abroad

Written by Mike Wallace

MBA

Reviewed by Allen Pfeister

MBA, CPA

Mike Wallace

MBA

Mike Wallace, CEO at Greenback Expat Tax Services, has extensive experience in finance, operations, and strategic leadership. Mike has worked in numerous C-Level roles, including at large financial institutions. Mike holds a Master's in Business Administration (MBA) from the University of Chicago's Booth School of Business.

Allen Pfeister

MBA, CPA

Allen Pfeister is a Partner at Tax Uncomplicated, collaborating with Greenback Expat Tax Services and Klemsen Consulting. Allen holds an MBA from the University of New Orleans and a BS in Accounting and Finance from Louisiana State University.

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Updated on September 23, 2026

9 minute read

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Wallace, M. (2026, September 23). U.S. Tax Filing Deadlines for Americans Living at Home and Abroad. GreenbackTaxServices.com. Retrieved , from https://www.greenbacktaxservices.com/knowledge-center/tax-deadlines-expats/

The U.S. tax deadline for 2026 federal returns is Thursday, April 15, 2027. That is the day to file your return, pay any tax you owe, or request more time with Form 4868, which moves your filing deadline to October 15, 2027. If you live outside the U.S. and Puerto Rico on April 15, you get an automatic extension to June 15, 2027, and you can ask the IRS by letter for a final extension to December 15, 2027.

Any tax you owe is still due on April 15, 2027, even if your filing date changes.

The FBAR (FinCEN Form 114) is due April 15 with an automatic extension to October 15 that requires no action on your part.

If you extended your 2025 return, your filing deadline is October 15, 2026.

When Are Taxes Due?

Federal income tax returns for individuals are due on the 15th day of the fourth month after the tax year ends, which is April 15 for calendar-year filers, according to the IRS. April 15 is both the filing deadline and the payment deadline. Each extension moves only the filing deadline.

1. April 15: Returns and Tax Payments Are Due

Your 2026 return, any tax you owe, IRA contributions for 2026, and the first estimated tax payment for 2027 are all due April 15, 2027. When the 15th lands on a Saturday, Sunday, or legal holiday, the deadline moves to the next business day. April 15, 2027, is a Thursday, so the date holds.

2. June 15: The Automatic Extension for Americans Abroad

U.S. citizens and resident aliens get two extra months to file if, on April 15, they live outside the U.S. and Puerto Rico and their main place of business or post of duty is abroad. Military personnel stationed abroad qualify, too. You file nothing in advance: you attach a statement to your return explaining which situation qualified you, and on a joint return, either spouse can qualify for both of you.

If you need to wait until you pass the physical presence test or the bona fide residence test before claiming the Foreign Earned Income Exclusion (FEIE), Form 2350 extends your deadline to a date after you qualify.

3. October 15: The Last Day to File Taxes With an Extension

October 15 is the last day to file with a Form 4868 extension: October 15, 2026, for 2025 returns and October 15, 2027, for 2026 returns. You file Form 4868 by April 15, or by June 15 if you already have the automatic extension abroad. The IRS asks for no reason and sends no approval. From abroad, you check the box for line 8 to indicate you are out of the country.

4. December 15: Extra Time by Letter for Filers Abroad

If you are out of the country and still cannot file by October 15, you can ask for a discretionary extension to December 15 by sending the IRS a letter explaining why, no later than October 15. The IRS only contacts you if it says no. The cost of the extra two months is covered in the guide to requesting more time after October 15.

Need More Time to File? Greenback Can Help

Greenback’s U.S. accountants can tell you which deadline applies to you, file your extension, and prepare your return well before your new due date.

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Tax Deadlines for the 2025 and 2026 Tax Years

For the 2026 tax year, returns are due on April 15, 2027; June 15, 2027, for Americans abroad; and October 15, 2027, with an extension. The 2025 tax year runs on the same dates one year earlier. The table carries both years side by side, including the FBAR, IRA, and estimated tax dates.

IRA Contributions Do Not Follow Your Extension

The IRS allows IRA contributions up to the return’s due date, “not including extensions,” so neither June 15 nor October 15 extends them. The four quarterly payment dates are in the guide to estimated tax payments.

Does an Extension Give You More Time to Pay?

No. Extensions cover only the filing date. Tax not paid by April 15 accrues interest from that date, plus a failure-to-pay penalty of 0.5% of the unpaid tax for each month or part of a month, capped at 25%.

Paying 90% by April 15 Removes the Late-Payment Penalty

Say you owe $3,000 on your 2026 return, extend on time, and pay it all when you file on October 15, 2027. That is six months at 0.5%, or about $90 in penalty before interest. Pay $2,400 by April 15, and the penalty applies only to the $600 balance, about $18.

If you pay at least 90% of the tax by April 15 and the rest when you file by your extended deadline, the IRS presumes reasonable cause for the extension period, and the failure-to-pay penalty does not apply. Interest still runs on the unpaid balance.

What Happens If You Miss a Tax Deadline?

If you are owed a refund, missing the deadline carries no failure-to-file penalty, because that penalty is a percentage of unpaid tax. If you owe, the penalty is 5% of the unpaid tax for each month or part of a month, up to 25%, reduced by the payment penalty in any month both apply. You can still file after the deadline, and the IRS asks you to file every return that is due, whether or not you can pay.

1. File as Soon as You Can

Filing stops the failure-to-file penalty from growing, whether or not you can pay yet. For a return filed more than 60 days late, the minimum penalty is $525 for returns due in 2026, or 100% of the unpaid tax if that is less, and the IRS adjusts the amount for inflation each year.

2. Pay What You Can, Then Set Up a Plan

Any payment reduces the balance that interest and the failure-to-pay penalty run on. An approved payment plan spreads out the rest, and when your return was filed on time, the failure-to-pay penalty drops to 0.25% a month during the plan.

3. Catch Up on Earlier Years

Americans abroad who fell behind for several years often qualify for the Streamlined Filing Compliance Procedures, which bring you current with three years of returns and six years of FBARs. For one late year, see the guide to filing late from abroad.

When Is the FBAR Due?

The FBAR is due April 15 each year and extends to October 15 on its own. You do not need to request this extension. It automatically applies to all FBAR filers. It is filed through FinCEN’s BSA E-Filing System, separately from your tax return, when your foreign accounts total more than $10,000 at any point in the year.

December 15 Does Not Apply to the FBAR

The law caps the FBAR at a six-month extension, so a return extended to December 15 still leaves the FBAR due October 15. The one exception is disaster relief, in which the government extends FBAR filing dates for affected filers.

When Are Business Taxes Due?

Partnerships and S corporations file by the 15th day of the third month after the tax year ends, which is March 15 for calendar-year businesses. C corporations file by the 15th day of the fourth month, April 15. Form 7004 extends each return by six months. Sole proprietors follow the Form 1040 dates.

March 15 Moved to March 16 in 2026

March 15, 2026, was a Sunday, so the 2025 partnership and S corporation returns were due Monday, March 16. In 2027, the date stays on March 15. If a business return is behind, the guide to late business returns covers the options.

Frequently Asked Questions

The Payment Date Stays April 15 Even When Your Filing Date Moves

Living abroad, Form 4868 and the December 15 letter each change the due date for your return, but the due date for your tax payment remains April 15 for all of them. Paying what you expect to owe by April 15, 2027, then filing on the date that fits your situation, helps keep interest and penalties small.

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This article is for informational purposes only and does not constitute tax, legal, or financial advice. Tax laws are complex and subject to change. Greenback Expat Tax Services, with expertise in U.S. taxes for Americans at home and abroad, recommends consulting a qualified tax professional about your specific situation.