June 15, 2026, is now just weeks away. If you are a US citizen or green card holder living outside the United States, this is your federal income tax deadline — not April 15. The IRS grants an automatic two-month extension to Americans whose tax home is in a foreign country, and no form is required to claim it. But automatic does not mean consequence-free. Interest on any unpaid taxes has been running since April 15, the clock is ticking on your ability to extend further, and there are critical forms most expats overlook. Here is everything you need to know — and do — before time runs out.
Key Takeaways
- June 15, 2026 is the automatic filing deadline for US citizens and green card holders living abroad — no form needed
- Interest on unpaid taxes started accruing April 15 — the filing extension does not extend your payment deadline
- File Form 4868 BEFORE June 15 to extend your filing deadline to October 15, 2026
- FBAR (FinCEN Form 114) has a separate deadline — April 15 with an automatic extension to October 15
- You are filing your 2025 tax return — FEIE exclusion is $130,000, not the 2026 amount of $132,900
Who Gets the June 15 Extension?
The automatic two-month extension is not available to every American. To qualify, you must meet both of the following conditions on April 15, 2026:
- Your tax home is in a foreign country. Your tax home is generally where you work or conduct business, not necessarily where you maintain a residence. If your principal place of business is Toronto, London, Dubai, or any location outside the United States, this condition is met.
- You are living outside the United States and Puerto Rico. You must be physically residing abroad on April 15. A US citizen who returned to the States before April 15 — even temporarily — may not qualify, depending on the circumstances.
Military personnel serving on official duty outside the United States also qualify for the June 15 extension, regardless of their tax home designation. US citizens stationed at overseas military bases meet both conditions automatically.
Dual citizens living permanently in another country — Americans in Canada, the UK, Australia, Germany, or any other nation — automatically qualify as long as they were residing abroad with a foreign tax home on April 15. There is no ambiguity for this group: June 15 is your deadline.
When you file your return, you must attach a statement explaining that you qualified for the extension by having your tax home in a foreign country and living outside the US on April 15. This is a simple statement — not a separate form — but omitting it can lead to the IRS treating your return as late-filed.
What You Need to File by June 15
Your June 15 filing package as a US expat typically includes several forms beyond the standard Form 1040. Here is what most Americans abroad need to prepare:
Form 1040 (US Individual Income Tax Return): This is your core return, reporting worldwide income from all sources — US and foreign. Salary from a Canadian employer, rental income from a UK property, interest from an Australian bank account, dividends from a German brokerage — all of it goes on the 1040. The US taxes based on citizenship, and every dollar of global income must be reported regardless of where it was earned or whether foreign taxes were paid on it.
Form 2555 (Foreign Earned Income Exclusion): If you qualify for the FEIE, you can exclude up to $130,000 of earned income for the 2025 tax year (the return you are filing now). For the 2026 tax year, the exclusion increases to $132,900, but that return is not due until 2027. To qualify, you must pass either the bona fide residence test or the physical presence test (330 full days outside the US in a 12-month period). The FEIE only applies to earned income — wages, salary, self-employment income — not investment income, pensions, or rental income.
Form 1116 (Foreign Tax Credit): If you paid income taxes to a foreign country, the FTC provides a dollar-for-dollar credit against your US tax liability. For expats in higher-tax countries like Canada, the UK, or Germany, the FTC typically eliminates the entire US tax bill. You can claim the FTC instead of or in addition to the FEIE — they apply to different categories of income.
Form 8938 (FATCA — Statement of Specified Foreign Financial Assets): If the total value of your foreign financial assets exceeds the applicable threshold, you must file Form 8938 with your 1040. For single expats living abroad, the thresholds are $200,000 on the last day of the year or $300,000 at any point during the year. For married filing jointly abroad, the thresholds double. This covers foreign bank accounts, investment accounts, pensions, and other financial assets.
FBAR (FinCEN Form 114): The FBAR is filed separately from your tax return through the BSA E-Filing System — not with the IRS. The original deadline is April 15, but it has an automatic extension to October 15. No form is needed to claim this extension. If the aggregate value of all your foreign financial accounts exceeded $10,000 at any point during 2025, you must file the FBAR. This is a separate obligation from Form 8938, and the thresholds and filing systems are different.
The Interest Trap Most Expats Miss
Here is the critical distinction that catches expats off guard every year: a filing extension is not a payment extension. The June 15 automatic extension gives you two extra months to file your return, but it does not give you a single extra day to pay your taxes. If you owe money to the IRS, interest began accruing on April 15 — regardless of the June 15 filing extension.
The current IRS interest rate on underpayments is approximately 8% per year, compounded daily. On top of that, the failure-to-pay penalty runs at 0.5% of the unpaid balance per month (6% annually), starting April 15. These charges accumulate together.
To put real numbers on this: if you owe $5,000 to the IRS, you are accruing roughly $1.10 per day in interest plus the monthly failure-to-pay penalty. By June 15, that is approximately $67 in interest and $50 in penalties — about $117 total on a $5,000 balance. Not catastrophic, but entirely avoidable.
The smart strategy: estimate your tax liability and make a payment by April 15, even if you are not ready to file the return. You can pay electronically through IRS Direct Pay or by mailing a check with Form 1040-ES. If you overestimate and pay too much, the IRS will refund the difference when you file. If you underestimate, you have at least reduced the balance on which interest and penalties accrue.
Pro Tip
If you need more time beyond June 15, file Form 4868 BEFORE June 15 — not on June 15. This extends your filing deadline to October 15, 2026. The form takes five minutes to complete and can be filed electronically through IRS Free File. But remember: Form 4868 is a filing extension only. You still need to estimate and pay any tax owed to minimize interest and penalties. If you cannot estimate accurately, pay what you can — any payment reduces your exposure.
