Yes, foreign interest income is taxable in the US. If you’re a US citizen, a Green Card holder, or a foreign national who meets the substantial presence test, every dollar of interest you earn from a foreign bank, foreign corporation, or foreign government belongs on your US tax return, taxed at the same rates as interest from a US account.1Internal Revenue Service. Reporting Foreign Income and Filing a Tax Return When Living Abroad What makes foreign interest different is not the tax rate. It’s the extra reporting: separate forms disclosing the accounts themselves, with penalties that can dwarf whatever tax you owe.
Who Has to Report It
The US taxes worldwide income based on who you are, not where the money is earned. Three groups fall under this net:
- US citizens, regardless of where they live or how long they’ve been away.
- Lawful permanent residents (Green Card holders), taxed identically to citizens for as long as they hold the card.
- Foreign nationals who meet the substantial presence test based on days physically present in the US.2Internal Revenue Service. Substantial Presence Test
One point that trips people up: whether the country where the account sits taxes the interest heavily, lightly, or not at all is irrelevant to your US obligation. A local exemption abroad does not create a matching exemption on your 1040.
Putting Foreign Interest on Your Return
Foreign interest goes on Schedule B, Part I, Line 1, right alongside any domestic interest.3Internal Revenue Service. Instructions for Schedule B (Form 1040) The practical difference is that foreign banks rarely issue a 1099-INT, so you’re pulling the figures from your own statements and converting them yourself.
Every amount on your return must be in US dollars. The default is to convert each interest payment at the spot rate on the date you received it.4Internal Revenue Service. Foreign Currency and Currency Exchange Rates For lots of small payments spread through the year, the IRS publishes yearly average exchange rates that many filers use as a practical shortcut.5Internal Revenue Service. Yearly Average Currency Exchange Rates
Schedule B also has a Part III question asking whether you had a financial interest in or signature authority over a foreign financial account. If you earned foreign interest, the answer is almost certainly yes. Checking that box doesn’t raise your tax, but it flags the account relationship and points to the separate filings described below.6Internal Revenue Service. About Schedule B (Form 1040) – Interest and Ordinary Dividends
Currency Gains Are Their Own Taxable Event
Something many first-time filers miss: if the exchange rate moves between the moment you earn the interest and the moment you convert it, that swing is a separate taxable item. Under Section 988, a gain from exchange rate movement is ordinary income and a loss is an ordinary loss.7Office of the Law Revision Counsel. 26 US Code 988 – Treatment of Certain Foreign Currency Transactions Earn €1,000 in interest at $1.08 and convert at $1.15, and you have a $70 currency gain on top of the interest itself. Both go on your return.
Avoiding Double Tax With the Foreign Tax Credit
If the foreign country withheld tax on the interest, you don’t just pay it a second time to the IRS. The Foreign Tax Credit lets you offset your US tax dollar-for-dollar by the income tax you paid abroad, claimed on Form 1116.8Internal Revenue Service. Foreign Tax Credit The Foreign Earned Income Exclusion does not apply here, because the IRS classifies interest as unearned income.9Internal Revenue Service. Foreign Earned Income Exclusion – What Is Foreign Earned Income
The credit is capped. Your limit is the share of your US tax attributable to foreign-source income: foreign-source taxable income divided by total worldwide taxable income, times your US tax before credits. Pay less foreign tax than the ceiling and you claim the full amount. Pay more, and the excess carries forward up to ten years, with a one-year carryback also available.10Office of the Law Revision Counsel. 26 US Code 904 – Limitation on Credit On Form 1116, foreign interest goes into the “passive category income” basket, which has its own separate credit calculation.
The $300 / $600 Shortcut
If your total foreign tax for the year was $300 or less ($600 if married filing jointly), you can skip Form 1116 and claim the credit directly on Schedule 3. This is available only when all your foreign income is passive category income reported on a qualifying statement like a 1099-INT, 1099-DIV, or Schedule K-1.11Internal Revenue Service. Instructions for Form 1116 (2025) The trade-off: using the election means giving up any carryover of excess credit from that year. For most people with modest foreign interest, the simplicity wins.
Why Tax Treaties Rarely Help
The US has income tax treaties with dozens of countries, and many reduce foreign withholding on interest. But nearly every US treaty includes a “savings clause” preserving the right of the US to tax its own citizens and residents as if the treaty didn’t exist.12Internal Revenue Service. Tax Treaties Can Affect Your Income Tax In practice, a treaty may lower the foreign side of your bill, which then lowers your Foreign Tax Credit, leaving your total tax roughly the same and just shifting more of it onto the US side.
Foreign Account Disclosures: FBAR and Form 8938
Reporting the interest is only half the job. Two separate filings may apply to the accounts themselves, and both are required even if the accounts earned nothing during the year.
FBAR (FinCEN Form 114)
You must file an FBAR if the combined highest balances of all your foreign financial accounts exceeded $10,000 at any point in the calendar year.13FinCEN.gov. Report Foreign Bank and Financial Accounts The $10,000 is aggregate across every foreign account you own or have signature authority over — bank, brokerage, even certain pension accounts. The FBAR goes to FinCEN, not the IRS, and is filed through the BSA E-Filing system separately from your tax return.14Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR) It’s due April 15, with an automatic extension to October 15 that you don’t have to request.
Form 8938
Form 8938 is a FATCA requirement that attaches to your tax return and follows the same due date, including extensions.15Internal Revenue Service. About Form 8938, Statement of Specified Foreign Financial Assets Thresholds depend on filing status and whether you live in the US or abroad. A single filer inside the US files once foreign assets top $50,000 on the last day of the year or $75,000 at any point during it. Married filing jointly inside the US, the thresholds are $100,000 and $150,000. Living abroad raises the bars substantially: $200,000 / $300,000 for single filers and $400,000 / $600,000 for joint filers. Married filing separately uses the single-filer amounts regardless of location.16Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets
FBAR and Form 8938 serve different agencies with different mandates. Meeting one does not excuse you from the other.
What Happens If You Don’t Report
Foreign interest is where an otherwise minor filing lapse turns expensive fast.
For the FBAR, a non-willful failure carries a base penalty of up to $10,000 per violation, adjusted for inflation (approximately $16,117 per account per year for 2026). Non-willful covers honest mistakes, and the penalty still applies. Willful failure raises the ceiling to the greater of $100,000 or 50% of the account balance at the time of the violation.17Office of the Law Revision Counsel. 31 US Code 5321 – Civil Penalties On a $300,000 account, that’s $150,000 for a single year.
Failing to file Form 8938 triggers a $10,000 penalty. If you still haven’t filed 90 days after the IRS notifies you, another $10,000 accrues for each 30-day period, up to $50,000 in additional penalties.18eCFR. 26 CFR 1.6038D-8 – Penalties for Failure to Disclose A single missed Form 8938 can therefore reach $60,000 before the underlying tax is even calculated.
On the tax itself, if the IRS finds negligence or a substantial understatement of income, an accuracy-related penalty of 20% of the underpayment applies.19Office of the Law Revision Counsel. 26 US Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments Interest compounds on top. For 2026, the IRS underpayment rate started at 7% and dropped to 6% in the second quarter, running from the original due date until you pay.20Internal Revenue Service. Quarterly Interest Rates
FATCA now requires foreign banks in participating countries to report US-person account information directly to the IRS, so unreported foreign accounts are far less invisible than they once were. If you have unreported interest or accounts from prior years, the IRS Streamlined Filing Compliance Procedures offer a route back into compliance with reduced penalties, but that door closes once the IRS reaches you first.