Exchange Rate

Katelynn Minott, CPA & CEO July 11th, 2026

An exchange rate is the rate used to convert one currency into another. For U.S. tax purposes, U.S. expats use exchange rates to translate foreign income, expenses, taxes, assets, account values, and transactions into U.S. dollars.

Why it matters for U.S. expats

U.S. tax returns are filed in U.S. dollars, even when income is earned, tax is paid, or accounts are held in another currency. The exchange rate used can affect taxable income, Foreign Tax Credit calculations, FBAR and FATCA reporting, capital gains, rental income, business income, and currency exchange gain.

Common questions

1. What exchange rate should U.S. expats use on a tax return?

Use the exchange rate that applies when the income, expense, tax, or transaction is received, paid, or accrued. The rate should be reasonable, supportable, and used consistently.

2. Does the IRS have an official exchange rate?

No. The IRS does not have one official exchange rate for all taxpayers. It accepts posted exchange rates used consistently, as long as the rate fits the facts.

3. Can U.S. expats use yearly average exchange rates?

Yes, when an annual average rate reasonably reflects recurring income or expenses. A specific transaction, such as a property sale, investment sale, or currency exchange gain calculation, may need the rate from the actual transaction date.

4. What exchange rate is used for the Foreign Tax Credit?

Foreign tax is converted into U.S. dollars using the rate that applies when the tax is paid or accrued, depending on the method used on the return.

5. What exchange rate is used for FBAR reporting?

FBAR uses the maximum account value during the calendar year, converted into U.S. dollars. FinCEN instructs filers to use the Treasury year-end exchange rate when one is available.

6. What exchange rate is used for Form 8938?

Form 8938 uses foreign asset values converted into U.S. dollars. The exchange rate should be reasonable and consistently applied, with the source kept in the taxpayer’s records.

7. Can different exchange rates be used on the same tax return?

Yes, if different items require different rates. Wages, foreign tax payments, investment sales, account values, and loan repayments may each need a rate that matches the timing and purpose of the calculation.

8. Do exchange rates affect foreign capital gains?

Yes. Foreign capital gains are calculated in U.S. dollars, so the exchange rate at purchase and the exchange rate at sale can affect the reported gain or loss.

9. Do exchange rates affect foreign mortgages?

Yes. A foreign-currency mortgage can create currency exchange gain or loss when the loan is repaid, refinanced, or settled.

10. What records should U.S. expats keep for exchange rates?

Keep the rate source, date, currency pair, calculation, and reason the rate was used. Good records are especially important for foreign taxes, investments, property sales, FBAR, FATCA, and business income.

When to get help

Professional guidance is important when:

You earned income, paid tax, or held accounts in a foreign currency.
You need to calculate the Foreign Tax Credit.
You sold foreign property, investments, or business assets.
You paid off or refinanced a foreign-currency mortgage.
You have foreign bank, brokerage, pension, or business accounts.
You need to report FBAR or Form 8938 values.
You are unsure whether to use a spot rate, yearly average rate, or year-end rate.

Bright!Tax can convert foreign-currency tax items correctly, document the exchange rates used, and prepare U.S. expat returns with consistent currency reporting. Get started with Bright!Tax.

U.S. tax reporting requirements for expats with foreign investments

Official sources

Reviewed by

Katelynn Minott, CPA & CEO

Last reviewed

July 2026