How do exchange rates affect my tax return?

Exchange rates play a significant role in US tax returns for expats because all amounts must be reported in US dollars, regardless of the currency in which income was earned or expenses were paid. The conversion method you use can materially affect your tax liability.

For income, the IRS generally requires you to use the exchange rate that was in effect on the date the income was received or accrued. For convenience, the IRS accepts the use of the yearly average exchange rate for income received evenly throughout the year, such as a salary. The IRS publishes yearly average exchange rates on its website for most major currencies.

For capital gains on the sale of foreign assets (property, investments), you use the exchange rate on the date of purchase for the cost basis and the exchange rate on the date of sale for the proceeds. This means currency fluctuations themselves can create taxable gains or losses. If you bought a foreign property for 500,000 euros when the rate was 1.10 (basis: $550,000) and sold it for 500,000 euros when the rate was 1.20 (proceeds: $600,000), you have a $50,000 taxable gain even though the property value did not change in euros.

For FBAR reporting, you use the Treasury Department's year-end exchange rate to convert maximum account balances to US dollars. For Form 8938 (FATCA), you use the exchange rate on the last day of the tax year for year-end values and the rate on the date of maximum value for the at-any-time threshold.

Foreign tax credit calculations require converting foreign taxes paid to US dollars. You can use the exchange rate on the date the tax was paid or accrued, or use an average rate if taxes are paid throughout the year.

Currency gains and losses on personal transactions (like converting currencies) are generally not taxable unless the gain exceeds $200. However, currency gains on business transactions and investments are fully taxable.

Consistent record-keeping of exchange rates used throughout the year is essential. We maintain detailed conversion records for all client returns.