The expat tax year has three deadlines, and most people who "missed the deadline" have missed one, not all three. Which one you missed decides whether you have a paperwork problem, a penalty problem, or no problem at all. Work through it in order.
First: which deadline did you actually miss?
| Date | What it is | Who it applies to |
|---|---|---|
| April 15 | Standard filing and payment deadline. Interest on any tax owed runs from this date regardless of extensions. | Everyone — but expats abroad on this date get the automatic extension below. |
| June 15 | Automatic two-month extension to file for taxpayers whose tax home and abode are outside the U.S. on April 15. No form required; attach a statement to the return. | Most Americans living abroad. |
| October 15 | Extended deadline if you filed Form 4868 by June 15. Also the automatic FBAR extension deadline — no request needed. | Anyone who requested the extension; every FBAR filer. |
| December 15 | Discretionary further extension for taxpayers abroad, requested by letter. Not automatic; not for FBARs. | Expats who cannot make October 15 and ask in advance. |
Source: IRS: automatic 2-month extension for taxpayers abroad and Form 4868. Full calendar in the expat deadline calendar.
You filed Form 4868 — you have until October 15
Then you haven't missed anything yet. File by October 15. Two things people get wrong here: the extension extended your time to file, not to pay — interest and the 0.5%-per-month failure-to-pay penalty have been running on any balance since April 15 — and the FBAR is due the same day, filed separately through FinCEN, not with your return. If you genuinely can't make it, send the December 15 request letter before October 15, stating the reason.
You didn't file an extension and it's past June 15
File now. Not next month — now. What it costs depends entirely on whether you owe tax:
- You owe nothing (the common expat case: foreign salary fully covered by the FEIE, or foreign tax paid exceeds U.S. tax via the Foreign Tax Credit): there is no failure-to-file penalty, because it is calculated as a percentage of unpaid tax. File the return, take the credit or exclusion, and the late filing has no financial consequence. One caution: the FEIE election technically has timing rules for late returns — file before the IRS contacts you and the election is preserved.
- You owe tax: the failure-to-file penalty is 5% of the unpaid tax per month or part of a month, capped at 25%, plus the 0.5% monthly failure-to-pay penalty, plus interest. A return filed in September with $2,000 due carries roughly $500 in file penalties plus a small amount of interest — painful but bounded. The same return filed the following year hits the 25% cap. Pay what you can with the return; a payment plan for the rest stops the failure-to-pay penalty from growing.
First-time penalty abatement: if you have filed and paid on time for the prior three years, you can request abatement of the failure-to-file penalty after the return is processed. It is granted routinely to first offenders; ask for it by phone or letter and cite "first-time abate."
The FBAR: October 15 is the real wall
If you had foreign accounts whose combined value exceeded $10,000 at any point in the year, the FBAR is due — and it has its own deadline logic. It is due April 15, automatically extended to October 15 with no request. There is no December option. A late FBAR with no unreported income and no unfiled returns can be handled with the delinquent FBAR submission procedure: file it electronically, select a reason for the delay, and there is generally no penalty. If you also have unfiled returns, that shortcut is not available to you — see below.
If this isn't the first year you've missed
This is the moment to stop and change programs. Filing several years of late returns one at a time — "just catching up" — is the single most expensive mistake expats make, because it walks straight into the penalty regime that the Streamlined Foreign Offshore Procedure exists to waive. Under Streamlined, a non-willful expat files three years of returns and six years of FBARs with a certification (Form 14653) and pays no failure-to-file, failure-to-pay, or FBAR penalties at all — only tax actually owed plus interest. The eligibility test is the non-residency requirement plus non-willfulness. If that's you, do not file this year's return alone; file it inside the Streamlined package.
What to do this week
- Identify which deadline applies to you from the table. If you're extended, you have until October 15 — for the return and the FBAR.
- Determine whether you owe tax. Run the FEIE vs FTC calculator; if the answer is zero, the late-filing penalty is zero and the urgency is about preserving elections, not money.
- Check whether you have any other unfiled years. If yes, read the Streamlined guide before filing anything.
- Gather documents: foreign pay statements, foreign tax paid, year-end and peak balances for every foreign account.
- File. Expat-specialist software handles the FEIE, FTC, FBAR, and the extension statement in one pass — see the software comparison — or hand it to a preparer if the return is complex. Pay any balance with the return, and request first-time abatement afterward if a penalty is assessed.
Frequently Asked Questions
Educational content, not tax advice. Penalty rates and deadlines are from IRS guidance for the 2025 tax year filed in 2026; verify against current IRS publications, and consult a qualified professional if you have unfiled prior years or any doubt about willfulness.
