Expat tax deadlines for tax year 2025 (filed in 2026)

Americans abroad get more time on their U.S. taxes than Americans at home — and most expats either don't know it or don't use it well. This article lists every deadline that matters for tax year 2025 (filed in 2026), with the practical guidance on when to use which extension.

The headline dates

Date	What's due	Who
April 15, 2026	Form 1040 filing & payment for U.S. residents	Everyone except expats
April 15, 2026	FBAR (FinCEN 114)	Anyone with $10K+ aggregate foreign accounts
April 15, 2026	Estimated tax payment Q1	Self-employed / non-withheld income
June 15, 2026	Automatic 2-month extension for expats — filing and payment	Expats (tax home abroad on April 15)
June 15, 2026	Estimated tax payment Q2	Self-employed / non-withheld income
September 15, 2026	Estimated tax payment Q3	Self-employed / non-withheld income
October 15, 2026	Form 1040 filing only (payment was due in April or June)	Anyone who filed Form 4868
October 15, 2026	FBAR (auto-extended from April 15)	Anyone with $10K+ aggregate foreign accounts
December 15, 2026	Discretionary extension to file 1040 (file Form 2350 by Oct 15)	Expats who need until Dec to qualify for FEIE
January 15, 2027	Estimated tax payment Q4 (for 2026)	Self-employed / non-withheld income

The automatic June 15 extension

If your tax home is in a foreign country and you are abroad on the original due date (April 15), you get an automatic 2-month extension to file and pay. No form required. You just attach a statement to your return when you file, explaining that you qualified for the extension.

Important details:

• The June extension is for both filing and payment. Interest still accrues on unpaid tax from April 15, but no late-payment penalty applies if you pay by June 15.
• You qualify if you meet the test on April 15 — even if you move back to the U.S. in May. It's a snapshot.
• "Abroad" means outside the 50 states and D.C. Being in Puerto Rico, military service members in combat zones, and similar special cases have separate rules.

Most expats with simple returns just file by June 15 and skip the further extensions.

The October 15 extension (Form 4868)

If June 15 isn't enough time, you can file Form 4868 by June 15 to get a further extension to October 15. This is purely an extension to file — your payment was due in April (or, with the automatic extension, June). Tax owed beyond June 15 accrues both interest and the late-payment penalty.

When to use Form 4868:

• You're waiting on foreign tax assessments that arrive late in the year (common in countries with annual reconciliation cycles).
• You're qualifying for FEIE under PPT and need more months to hit 330 days.
• You're preparing a Streamlined catch-up filing and need time to assemble three years of returns and six years of FBARs.
• Your foreign broker hasn't issued year-end statements until summer (common in Europe).

The December 15 extension (Form 2350)

If you're working toward FEIE qualification and your qualifying period extends past October 15, you can file Form 2350 by October 15 to request a discretionary extension to December 15. This is rare — used mostly by expats who moved abroad late in 2025 and need to wait into late 2026 to complete their 330-day PPT period.

The IRS grants 2350 extensions liberally for valid FEIE-qualifying reasons. The form requires you to state when you expect to qualify and why you need the extra time.

The FBAR deadline trick

FBAR is due April 15 but has an automatic extension to October 15 — no form required, no statement required. Most expats simply file by October 15.

If you miss October 15 on the FBAR, the Streamlined Filing Procedures or the Delinquent FBAR Submission Procedures apply. Don't just quietly file in November and hope.

Estimated tax for self-employed expats

If you're self-employed abroad, you owe quarterly estimated tax payments on your self-employment tax (Social Security + Medicare, ~15.3% on net earnings), even if FEIE eliminates the income-tax piece.

The four quarterly payments are due April 15, June 15, September 15, and January 15 of the next year. The "save fees" trick of using the June 15 automatic expat extension doesn't apply to estimated tax — those are separate deadlines.

If you're covered by a totalization agreement with your country of residence (paying foreign social security on your earnings instead), you don't owe U.S. SE tax — but you must include the certificate of coverage with your return.

Penalties for missing deadlines

Penalty	Amount
Failure to file 1040 (when tax is owed)	5% of unpaid tax per month, capped at 25%
Failure to pay 1040 tax	0.5% per month, capped at 25%
Interest on unpaid tax	Federal short-term rate + 3% (currently ~8%, compounded daily)
Failure to file FBAR (non-willful)	Up to $10,000 per FBAR
Failure to file FBAR (willful)	Greater of $100,000 or 50% of account balance
Failure to file Form 8938	$10,000 initial + up to $50,000 continuation
Failure to file Form 8621 (PFIC)	Statute of limitations on the entire return never closes
Failure to file Form 5471 (foreign corp)	$10,000 per form, per year

The income-tax penalties only apply if you owe tax. Most expats end up at $0 after FEIE/FTC — so the late-filing penalty is often $0 even when the filing itself is years late. The information-return penalties are not tied to tax owed, so they apply regardless.

What "tax home abroad" means for the June 15 extension

The IRS uses "tax home" in its usual sense: your principal place of business, employment, or post of duty. For most expats, that's where you actually live and work — Berlin, Tokyo, Mexico City, Singapore, etc.

It does not mean:

• You can claim the extension by being on vacation outside the U.S. on April 15.
• A 6-month sabbatical abroad while keeping your U.S. job and family makes you "abroad" for the extension.

Two simple tests for the typical expat:

• Your day-to-day workplace is in the foreign country.
• You meet (or are working toward meeting) PPT or BFR for FEIE purposes.

If those are both true on April 15, you qualify.

What if you miss everything

Three scenarios:

1. You owe nothing. Most expats. Late filing penalties are computed as a % of unpaid tax — 5% of zero is zero. There's no penalty for late-filing a return with no tax due (with one exception: failure-to-file Form 8938 or FBAR carries flat penalties regardless of tax).
2. You owe tax and missed both June and October. The late-payment penalty + interest accrue from April. File ASAP. If you can't pay, file anyway — failure-to-file is worse than failure-to-pay.
3. You missed multiple years. Don't try to catch up year by year. Look at Streamlined Filing Procedures, which eliminates penalties on the catch-up filing if you qualify.

The minimal annual rhythm

For most salaried expats with $0 U.S. tax owed:

• January: Pull foreign account year-end balances for FBAR.
• March: Get your foreign tax year-end statements (Lohnsteuerbescheinigung, P60, 원천징수영수증, etc.).
• June 15: File Form 1040 under the automatic expat extension.
• October 15: File FBAR.

That's it. Two filings, no estimated tax, no penalty. Set those two dates as recurring calendar reminders and you're done.

Next steps

• Who must file as a U.S. expat
• What is FBAR?
• Streamlined Filing Procedures
• FEIE in depth