Every key filing date for the 2025 tax year — FBAR, Form 1040, estimated taxes, and extensions. Check the boxes below to filter deadlines to your situation.
Last reviewed April 2026 by Ken Hoven against IRS Pub. 54, Form 4868 instructions, FinCEN Form 114 instructions, and Treasury Reg. § 1.6081-5. See editorial standards.
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U.S. expats face a more complex set of filing deadlines than domestic taxpayers. The standard April 15 deadline applies as a base, but several automatic extensions and special provisions shift many deadlines later in the year. Getting the deadlines wrong — especially for estimated taxes — can result in underpayment penalties even if you ultimately owe nothing.
The Automatic 2-Month Expat Extension
If you are a U.S. citizen or resident alien living outside the United States and Puerto Rico on the regular due date of your return, you automatically get a 2-month extension to June 15, 2026 to file Form 1040 and pay any tax owed. No extension form is required — but you should attach a statement to your return explaining that you qualify.
Important: This extension is for filing, not payment. Interest accrues from April 15 on any unpaid tax, even if you have the extension to file.
The extension does not postpone interest. If you expect to owe tax, pay your estimated amount by April 15 to avoid interest charges. The extension only prevents the failure-to-file penalty — not the failure-to-pay penalty or interest.
Form 4868 Extension to October 15
If you need more time beyond June 15, you can file Form 4868 (Application for Automatic Extension) on or before June 15, 2026 to extend your filing deadline to October 15, 2026. Again, this does not extend the time to pay tax owed.
The Rarely-Used December Extension
In certain circumstances — specifically for taxpayers living abroad — you may request an additional 2-month extension to December 15, 2026 by writing a letter to the IRS explaining why you need the extra time. This extension is not automatic and must be requested before October 15. It is generally granted to expats who can demonstrate they are abroad.
FBAR Deadlines
The FBAR (FinCEN Form 114) is due April 15, but FinCEN grants an automatic extension to October 15 — no form or request needed. If you missed prior year FBARs, the Streamlined Filing Compliance Procedures can help you catch up with reduced penalty exposure.
Estimated Tax Quarterly Deadlines
If you are self-employed, have significant investment income, or expect to owe $1,000 or more in tax not covered by withholding, you should make quarterly estimated tax payments. Missing estimated payments can trigger an underpayment penalty even if you pay in full when you file. The four payment dates are:
Q4 2025: January 15, 2026
Q1 2026: April 15, 2026
Q2 2026: June 15, 2026
Q3 2026: September 15, 2026
State taxes: This calendar covers federal deadlines only. Many U.S. states that have an income tax do not automatically conform to the federal expat extension. Check your state's rules if you have a state filing obligation.
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