THE TRANSATLANTIC MAGAZINE
THE TRANSATLANTIC MAGAZINE
For millions of Americans living overseas, tax season comes with an extra layer of confusion, and one of the most common misunderstandings centers around two critical dates: April 15 and June 15.
You may know that US citizens abroad receive an automatic two-month extension to file their federal tax return. While this is true, the extension does not apply to the payments of taxes. If you expect to owe money, April 15 remains a key deadline you can’t afford to ignore.
What you probably do know is that the United States is one of only two countries in the world that taxes its citizens based on citizenship rather than residency – the other is Eritrea. So, whether you’re working in London, teaching in Bangkok, or retired in Lisbon, you are still required to file a US tax return each year if your income exceeds certain thresholds. To ease the burden slightly, the IRS grants Americans abroad an automatic filing extension from April 15 to June 15. No forms are required to qualify – if your residence for tax purposes is outside the US on April 15, the extension applies automatically.
However, this is where many expats get tripped up. The extension is for filing paperwork, not for paying taxes owed. If you anticipate that you will owe any tax to the IRS, that payment is still due by April 15. Missing this distinction can lead to unnecessary penalties and interest charges that begin to accrue immediately after the April deadline.
This matters, because the IRS treats unpaid taxes differently from unfiled returns. While the failure-to-file penalty is generally higher, the failure-to-pay penalty and interest can still add up quickly. Even if you file your return by June 15 under the automatic extension, you could still face charges if you didn’t pay what you owed by April 15.
For overseas Americans, estimating what you owe can be challenging. Many expats can benefit from tax mechanisms such as the Foreign Earned Income Exclusion (FEIE, using Form 2555) and the Foreign Tax Credit (FTC, Form 1116), which may reduce or eliminate their US tax liability.
With the FEIE, eligible expats can exclude up to $130,000 in 2025 foreign earnings from US tax.
The FTC can be used to offset US taxes with income tax paid to a foreign government, particularly useful in high-tax countries. Check here to see if the United States has a Totalization Agreement, a treaty with your country of residence to avoid double-taxation on social security.
However these provisions do not always reduce the tax owed to zero. For example, with income above FEIE limits, certain types of unearned income, or differences in tax rates between countries can leave you owing money.
If you’re unsure whether you’ll owe, it’s generally safer to make a conservative estimated payment by April 15. Overpaying slightly is far less costly than underpaying. If it turns out you paid too much, you’ll receive a refund once you file your return.
You should also remember that if the total value of your foreign bank accounts exceeds $10,000 at any time, you must file a Report of Foreign Bank and Financial Accounts (FBAR) (FinCEN Form 114) by October 15, separate from your tax return.
Another important point is that while the June 15 extension is automatic, any further extension to October 15 requires filing a formal request. As with the earlier June extension, this additional extension does not extend your time to pay, only your time to file. By that stage, any unpaid balance from April will already have accrued interest for several months.
Planning ahead is essential. You should begin reviewing your financial situation early in the year, gathering your income records. You should also consider the impacts of exchange rates: currency fluctuations can affect your tax liability when converting foreign earnings into US dollars. Waiting until June to think about your taxes can leave you scrambling—and potentially paying more than necessary in penalties.
The key takeaway is simple but crucial: the June 15 and October 15 extensions give you more time to file, not more time to pay. April 15 is still the deadline for settling your tax bill with the IRS. Plan ahead, and when in doubt err on the side of paying a higher amount, early.
You may want to think about consulting a professional who specializes in cross-border taxation. Hiring one may seem an added expense, but it can save money and stress in the long run, especially if your situation involves multiple income streams, foreign investments, or complex reporting requirements like FBAR or FATCA disclosures.
You can find such advisors in The A-List – The American’s directory of specialist professionals.
