The June 15 Deadline Is Real. The October 15 FBAR Will Cost You More.

The Two Deadlines Nobody Mentions

Most Americans abroad know about April 15. A smaller group knows about June 15. Almost nobody outside the expat tax bar knows what really matters: October 15, and a non-tax form filed with a separate agency that will quietly fine you $14,000 per forgotten bank account if you ignore it.

The IRS gives US citizens living overseas an automatic two-month extension to file Form 1040. That gets you from April 15 to June 15. It's automatic — you don't apply, you don't notify anyone, you just attach a one-line statement to your return explaining that your tax home and physical residence were both outside the US on the regular filing date.

Then there's the FBAR. Different form. Different agency. Different deadline. Different penalty structure. And the IRS doesn't send you a reminder, because the IRS isn't the agency that collects it.

Here's what's actually on the calendar between now and the end of the year, and what each piece costs if you get it wrong.

§ 01June 15 Is Not a Gift

The two-month extension sounds generous until you read the fine print. The IRS extends the filing deadline. It does not extend the payment deadline.

If you owe US tax on April 15 — even if you don't yet know how much — the meter starts running. Interest accrues from April 16, currently at the federal short-term rate plus 3%, which sits around 8% annually in May 2026. The failure-to-pay penalty is another 0.5% per month of unpaid tax, capped at 25%. Both stack on each other.

So the practical move for anyone who suspects they'll owe is this: estimate your liability, wire a payment to the IRS by April 15, and use the June 15 filing extension to finalize the math. Overpaying is annoying but recoverable. Underpaying compounds.

Most expats in high-tax countries (Germany, France, the UK, Canada) end up owing zero US federal income tax after the Foreign Tax Credit washes everything out. But "most" is not "everyone." If you have US-source rental income, a Roth conversion, capital gains in a taxable brokerage account, or a year where your foreign tax bill ran behind your US bill, you owe money on April 15. The extension to June 15 doesn't help you with that.

Need more than June 15? File Form 4868 by June 15 and the deadline shifts to October 15. Still doesn't extend the payment date.

§ 02The FEIE Math: $130,000 of Air

The Foreign Earned Income Exclusion is the cleaner of the two main expat tools. For tax year 2025 (filed in 2026), you can exclude up to $130,000 of foreign earned income from US taxation. For tax year 2026 (filed in 2027), the indexed figure is $132,900.

To qualify, you have to clear one of two tests:

1. Bona fide residence test. You're a tax resident of a foreign country for an uninterrupted period that includes a full calendar year. Most people who've genuinely moved abroad meet this without thinking about it. Trip-back visits to the US are fine; the test cares about intent and the structure of your foreign residence, not your air miles.
2. Physical presence test. You spent at least 330 full days outside the US during any 12-month period that includes part of the tax year. A "full day" is 24 hours on foreign soil — your travel day to or from the US doesn't count. Layovers in US airports also don't count.

You elect FEIE on Form 2555 attached to your 1040. Here's the catch the brochures don't dwell on: FEIE only covers earned income. Salary, freelance fees, self-employment net earnings. It does nothing for dividends, interest, capital gains, rental income, or pension distributions.

And the exclusion is elective and revocable. Once you revoke it, you can't re-elect it for five years without IRS permission. So if a year comes along where the Foreign Tax Credit gives you a better outcome than FEIE — which happens more often than people expect, especially in high-tax Europe — switching back later is a five-year commitment, not a one-year audible.

§ 03The Foreign Tax Credit, Quietly Better

The Foreign Tax Credit is older, less marketed, and for most expats in serious tax jurisdictions, the better tool.

The mechanic is straightforward: every dollar of income tax you paid to a foreign government becomes a dollar of credit against your US tax liability on the same income. Not a deduction (which only reduces taxable income). A credit (which reduces tax dollar for dollar). You claim it on Form 1116.

An American software engineer earning €110,000 in Munich pays roughly 30% effective German income tax — call it €33,000, or about $36,000 at current rates. Their US federal tax on that same income, before any credit, runs somewhere around $18,000 for a single filer. The FTC wipes out the entire $18,000 and leaves a carry-forward of the excess foreign tax paid, usable against US tax on foreign income for the next ten years. Net US liability: zero.

Now run the same income through FEIE. You exclude $130,000 of foreign earnings, which covers the full $120,000-ish in euros after conversion. US federal liability: also zero. Same answer on the front end.

But the FTC has two structural advantages FEIE doesn't:

• It builds a carry-forward. Excess foreign tax credits roll forward for ten years. If you take a year off, change countries, or get hit with a US-side tax event (a big stock vest, an inheritance), the carry-forward can absorb a chunk of it.
• It plays nicely with the Child Tax Credit. FEIE excludes income, which also excludes it from the earned-income calculation that determines refundable CTC. Families with US-citizen kids living abroad routinely lose the refundable portion of the CTC because they took FEIE instead of FTC.

The rule of thumb: in a high-tax country, run FTC. In a low- or no-tax country (UAE, Singapore for some salary structures, Saudi), run FEIE. Run the numbers both ways before you commit.

§ 04FBAR: The Form That Costs $10K Per Account

This is the one that catches people, and it has nothing to do with the IRS.

The Bank Secrecy Act of 1970 requires every US person — citizens, green card holders, certain visa holders — to report foreign financial accounts to the Treasury Department if the aggregate balance across all accounts exceeded $10,000 at any point in the calendar year. Any point. One day. One transient transfer.

The form is FinCEN Form 114, filed electronically through the BSA E-Filing System. It goes to the Financial Crimes Enforcement Network, not the IRS. It's not part of your tax return. Your accountant may or may not handle it depending on what you've engaged them for.

What counts as a "foreign financial account":

• Bank accounts (checking, savings, time deposits) at any non-US institution
• Brokerage accounts held at foreign firms
• Foreign mutual funds and most foreign pension accounts
• Foreign life insurance with a cash value
• Accounts you have signature authority over even if you don't own them (a parent's account, an employer's account if you're a check-signer)

The deadline is technically April 15, but FinCEN grants an automatic extension to October 15 for everyone. No form required. This is why most expat-tax services frame October 15 as "the real expat deadline" — it's the latest date everything has to be in.

The penalty schedule is where the numbers get uncomfortable. The Bank Secrecy Act caps the non-willful civil penalty at $10,000 per violation, but the figure is indexed for inflation — for 2026, it's just over $14,000. The Supreme Court's 2023 Bittner v. United States decision clarified that the cap applies per form, not per account, for non-willful violations. So a forgotten FBAR with 12 unreported accounts caps at one $14,000 penalty, not twelve.

For willful violations, the cap is the greater of $100,000 or 50% of the account balance at the time of the violation. Per year. And there's no Bittner rescue here — willful penalties stack across years.

§ 05What "Non-Willful" Actually Means

The willful/non-willful distinction is doing enormous work in this penalty regime, and the line is fuzzier than most people realize.

"Willful" in FBAR enforcement isn't just "you knew about the form and ignored it." Courts have ruled that reckless disregard or willful blindness can both qualify. If you signed a tax return that asked, on Schedule B, whether you had foreign accounts — and you ticked "no" while holding a German savings account — that signature is now Exhibit A in an argument that you were at minimum reckless.

The IRS's Streamlined Filing Compliance Procedures exist for the genuinely non-willful. The Streamlined Foreign Offshore (SFO) version requires:

• Three years of amended or original 1040 returns
• Six years of FBARs
• A signed certification (Form 14653) that the failure was non-willful, under penalty of perjury
• Payment of any tax owed plus interest — but no FBAR penalty and no failure-to-file penalty

The Domestic version (SDO) is similar but assesses a 5% miscellaneous offshore penalty on the highest aggregate account balance during the covered period. The Foreign version has no such penalty, which is why expats overwhelmingly use SFO.

The catch: that "under penalty of perjury" certification is not a formality. If the IRS later concludes the violation was actually willful, you've now created a written false statement on top of the original omission. The Streamlined process is for people who can credibly say they didn't know — not for people hoping the IRS won't dig further.

§ 06The FATCA Shadow on Form 8938

FBAR has a younger, IRS-side cousin: Form 8938, the Statement of Specified Foreign Financial Assets. This one filed with your 1040, due on whichever date your 1040 is due.

The thresholds are higher than FBAR. For a single filer living abroad, you only file 8938 if specified foreign assets exceeded $200,000 on the last day of the year, or $300,000 at any point during the year. Married filing jointly abroad: $400,000 / $600,000. So the typical expat with a normal checking account doesn't have an 8938 obligation but absolutely has an FBAR obligation.

Where this gets ugly: FATCA also obligates foreign financial institutions to report on US-person account holders directly to the IRS. So the IRS already has the data. They know the account exists. They know roughly what's in it. When they run a match against your filed FBARs and your 8938 (or its absence), the discrepancy is automated.

This is the structural reason FBAR enforcement has gotten sharper over the last decade. Pre-FATCA, finding an unreported foreign account meant getting a tip from a whistleblower or stumbling on it in audit. Post-FATCA (effective 2014 for the major reporting waves, fully phased in by 2017), the IRS gets a quarterly data feed from most major foreign banks. The form is the audit trail. The data is already there.

§ 07What to File, in What Order, Before What Date

Here's the rough sequence if you're an American abroad with normal-complexity finances. Adjust for your own situation, get a real preparer if anything below feels unfamiliar.

Two practical notes:

• The 1040 statement for the automatic extension is one paragraph. Attach a written note to the return saying you qualified for the automatic 2-month extension because both your tax home and abode were outside the US on the regular filing date. That's it. No form, no signature beyond your 1040 signature.
• FBAR is filed online, not mailed. The BSA E-Filing System lives at bsaefiling.fincen.treas.gov. There's no paper option for individuals anymore. Filing takes maybe 20 minutes per year if your account list is stable.

If you've never filed before and you should have — three years back, five years back, eight years back — don't just start filing this year and hope the prior years stay quiet. The Streamlined Procedures exist precisely for that situation, and getting in voluntarily before the IRS finds you is the difference between a clean record and a willful-violation argument.

The expat tax guide walks through residency rules and treaty mechanics country by country. The digital nomad guide covers FEIE qualification when you're not really a "resident" anywhere. The US calculator will run your federal liability so you can size the April 15 estimated payment before the meter starts.

§ 08Key Takeaways

• June 15 is the filing deadline, not the payment deadline. Interest accrues from April 16 at roughly 8% annually if you owe. Estimate, pay, then finalize.
• FEIE excludes up to $130,000 of foreign earned income for tax year 2025 ($132,900 for 2026). It's elective and revocable, but re-electing after revocation requires waiting five years or asking the IRS for permission.
• The Foreign Tax Credit is usually better than FEIE in high-tax countries because it builds a 10-year carry-forward and preserves Child Tax Credit eligibility. Run the math both ways the first year.
• FBAR is the real deadline. FinCEN Form 114, filed online to Treasury (not IRS), due automatically by October 15. Non-willful penalty is around $14,000 per form; willful is the greater of $100K or 50% of the balance, per year.
• The Bittner decision caps non-willful FBAR penalty per form, not per account. Twelve unreported accounts on one missed FBAR caps at one penalty. Twelve unreported accounts across twelve missed years does not.
• Form 8938 is separate from FBAR and only applies above $200K (single, abroad) or $400K (married joint, abroad) in specified foreign assets. Most expats have an FBAR obligation but not an 8938 obligation.
• The Streamlined Filing Compliance Procedures are the standard route back to compliance for non-willful past-omission cases. Three years of returns, six years of FBARs, a signed non-willful certification. Use it before the IRS finds you, not after.

Disclaimer: Figures, deadlines, and penalty amounts are drawn from IRS Publication 54 (Tax Guide for US Citizens and Resident Aliens Abroad), FinCEN Form 114 instructions, the IRS Streamlined Filing Compliance Procedures pages, and the Supreme Court's 2023 Bittner v. United States decision. Inflation-indexed FBAR penalty amounts reflect the 2026 federal civil penalty adjustment schedule. This article is informational and does not constitute tax, legal, or financial advice. Consult a qualified expat tax preparer or an attorney before acting on any of it.