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 anywhere in the world belongs on your US tax return, at the same rates that apply to interest from a domestic bank.1Internal Revenue Service. Reporting Foreign Income and Filing a Tax Return When Living Abroad Whether the foreign country taxes that interest heavily, lightly, or not at all makes no difference to what you owe the IRS. And beyond the tax itself, the accounts generating the interest often trigger separate disclosure filings whose penalties can far exceed the tax.
Who the Rule Applies To
The US taxes based on citizenship and residency rather than where income is earned. Federal law defines gross income as “all income from whatever source derived,” and interest from foreign banks, foreign corporations, and foreign governments is part of that worldwide net.1Internal Revenue Service. Reporting Foreign Income and Filing a Tax Return When Living Abroad Three groups are affected:
- US citizens owe tax on worldwide income regardless of where they live, even after decades abroad.
- Green Card holders are taxed the same as citizens for as long as they hold lawful permanent resident status.
- Foreign nationals who pass the substantial presence test: at least 31 days of US presence in the current year and at least 183 days over a three-year lookback that counts all current-year days, one-third of prior-year days, and one-sixth of days two years back.2Internal Revenue Service. Substantial Presence Test
If a country exempts savings interest from local tax, that exemption stops at its border. It does not create a matching exemption on your 1040.
How to Report Foreign Interest on Your Return
Foreign interest goes on Schedule B (Interest and Ordinary Dividends), Part I, Line 1, the same line you’d use for domestic interest reported on a 1099-INT.3Internal Revenue Service. Instructions for Schedule B (Form 1040) The practical difference is that foreign banks generally don’t send a 1099. You pull the numbers from your own statements and calculate the US dollar amount yourself.
Everything on the return must be in US dollars. The default rule converts each interest payment at the spot exchange rate on the date you received it.4Internal Revenue Service. Foreign Currency and Currency Exchange Rates If you received many small payments throughout the year, the IRS publishes yearly average exchange rates that many taxpayers use as a practical shortcut.5Internal Revenue Service. Yearly Average Currency Exchange Rates
Schedule B also contains Part III, which asks 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 signals the IRS to look for the account-level filings described below.6Internal Revenue Service. About Schedule B (Form 1040) – Interest and Ordinary Dividends
Avoiding Double Tax With the Foreign Tax Credit
If a foreign country already withheld income tax on your interest, you don’t pay the same tax twice. The Foreign Tax Credit, claimed on Form 1116, reduces your US tax dollar-for-dollar by the foreign income tax you paid.7Internal Revenue Service. Foreign Tax Credit The Foreign Earned Income Exclusion on Form 2555 is not an option here, because the IRS classifies interest as unearned income.8Internal Revenue Service. Foreign Earned Income Exclusion – What Is Foreign Earned Income
The credit is capped at the portion of your US tax that corresponds to your foreign-source income. The formula divides foreign-source taxable income by total worldwide taxable income, then multiplies by your total US tax before credits. Foreign tax up to that ceiling is creditable. Anything above it carries forward for up to ten years, with a one-year carryback also allowed under the statute.9Office of the Law Revision Counsel. 26 US Code 904 – Limitation on Credit
The Shortcut for Small Amounts
If the total foreign tax you paid for the year was $300 or less, or $600 or less filing jointly, you can skip Form 1116 and take the credit directly on Schedule 3 of your Form 1040. This election is available only when all your foreign income is passive (interest and dividends qualify) and was reported on a qualifying statement such as a 1099-INT, 1099-DIV, or Schedule K-1.10Internal Revenue Service. Instructions for Form 1116 (2025) The trade-off: electing the shortcut forfeits any carryover of excess credit from that year.
Do Tax Treaties Help?
The US has income tax treaties with many countries, and some reduce withholding on cross-border interest. For US citizens and Green Card holders, the benefit is limited. 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.11Internal Revenue Service. Tax Treaties Can Affect Your Income Tax A treaty may lower the foreign side’s withholding, which means less foreign tax paid, which in turn means a smaller Foreign Tax Credit. Total tax ends up roughly the same, with more of it shifted to the US.
Reporting the Account Itself: FBAR and Form 8938
Reporting the interest is only half the obligation. Two separate information reports may apply to the foreign accounts that produced it. Both exist for anti-money-laundering and compliance purposes rather than to calculate tax, and both are required even if the accounts generated zero income during the year.
FBAR (FinCEN Form 114)
File an FBAR if the combined highest balances of all your foreign financial accounts exceeded $10,000 at any point during the calendar year.12FinCEN.gov. Report Foreign Bank and Financial Accounts The threshold is aggregate across every foreign account you own or have signature authority over, including bank accounts, brokerage accounts, and some foreign pension accounts. The FBAR goes to the Financial Crimes Enforcement Network (FinCEN), not the IRS, and is filed electronically through the BSA E-Filing system rather than attached to your return.13Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR) It is due April 15, with an automatic extension to October 15 that requires no request.
Form 8938
Form 8938 is a separate requirement under the Foreign Account Tax Compliance Act (FATCA). It attaches to your tax return and is due when the return is due, including extensions.14Internal 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:15Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets
- Single, living in the US: above $50,000 on the last day of the year or above $75,000 at any point during the year.
- Married filing jointly, living in the US: above $100,000 on the last day or above $150,000 at any point.
- Single, living abroad: above $200,000 on the last day or above $300,000 at any point.
- Married filing jointly, living abroad: above $400,000 on the last day or above $600,000 at any point.
Married filing separately uses the single-filer thresholds regardless of where you live. Filing one of these forms does not excuse you from the other; they serve different agencies with different enforcement mandates.
What Happens If You Don’t Report
Foreign interest is where penalties become disproportionate to the amounts involved. The IRS has invested heavily in enforcement since FATCA took effect, and foreign banks in participating countries now report US account holders directly to the IRS, so the assumption that an overseas account is invisible is largely outdated.
For a non-willful FBAR failure, the base statutory penalty is up to $10,000 per violation, adjusted annually for inflation; the figure for 2026 is approximately $16,117 per account per year. Non-willful covers honest mistakes and plain ignorance of the rule. A willful failure carries a maximum penalty of the greater of $100,000 or 50% of the account balance at the time of the violation.16Office of the Law Revision Counsel. 31 US Code 5321 – Civil Penalties On a $300,000 account, that’s a $150,000 penalty for a single year.
Missing Form 8938 triggers a $10,000 penalty. If the failure continues 90 days after the IRS sends notice, additional $10,000 penalties accrue for every 30-day period, up to $50,000 more.17eCFR. 26 CFR 1.6038D-8 – Penalties for Failure to Disclose A single missed Form 8938 can cost up to $60,000 before the IRS even looks at the tax owed.
On the tax itself, an accuracy-related penalty of 20% of the underpayment applies if the IRS finds negligence or a substantial understatement of income.18Office of the Law Revision Counsel. 26 US Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments Interest compounds on top of that; the IRS underpayment rate was 7% at the start of 2026 and dropped to 6% in the second quarter, running from the original due date until the balance is paid.19Internal Revenue Service. Quarterly Interest Rates The longer unreported income sits, the more it costs.