What Is Section 988 Gain or Loss on Foreign Currency?

Section 988 gain or loss on foreign currency is the tax code’s name for the gain or loss you get purely from exchange rate movement between the time a foreign-currency transaction is booked and the time it settles. By default, that gain or loss is ordinary, meaning it is taxed at your regular income tax rate rather than at capital gains rates, and losses are fully deductible against any kind of income.¹ The rule applies whenever a U.S. taxpayer transacts in a currency other than the U.S. dollar, which the code treats as the functional currency for almost all domestic individuals and businesses.²

When Section 988 Applies to You

A Section 988 transaction is any transaction where the amount you pay or receive is denominated in a nonfunctional currency. The statute reaches four broad situations:¹

Borrowing or lending money in a foreign currency, including foreign-denominated bank loans and bonds.
Accruing a receivable or payable in a foreign currency, such as invoicing a customer in euros or owing a supplier in pounds.
Entering into foreign currency forward contracts, futures, options, and similar instruments (unless they already fall under the mark-to-market rules of Section 1256).
Disposing of foreign currency itself, including converting euros held in a bank account or as physical cash back into dollars. The statute’s definition of nonfunctional currency covers coins, bills, demand deposits, time deposits, and similar bank instruments.

The trigger is the currency, not the nationality of the parties. Two U.S. companies transacting with each other fall under Section 988 if the payment obligation is set in a foreign currency.

Why Ordinary Treatment Matters

The defining feature of Section 988 is that the resulting gain or loss is ordinary, which overrides the capital asset rules that would otherwise apply to many of these instruments.¹

Ordinary treatment helps on losses. A Section 988 loss is deductible in full against wages, business profits, investment income, or anything else you report. Capital losses, by contrast, can offset capital gains but only up to $3,000 of other income per year for individuals ($1,500 if married filing separately).³ A $50,000 Section 988 loss can be absorbed in a single tax year. The same amount of capital loss, with no capital gains to offset it, would take more than 15 years to use up.

Ordinary treatment hurts on gains. Section 988 gains are taxed at your marginal rate, which runs as high as 37%. If the same amount had been a long-term capital gain, it would have been taxed at 0%, 15%, or 20%. The IRS treats currency movement as a cost or benefit of doing business rather than an investment return, and it taxes it that way whether you like the result or not.

How To Calculate the Gain or Loss

The calculation isolates the exchange rate move alone. Compare the dollar value of the foreign currency amount on the date the transaction was booked against the dollar value on the date it settled. Any gain or loss on the underlying goods, services, or investment is a separate tax item.

A payable example: your U.S. company buys equipment from a German supplier for €10,000 on January 1, when the rate is $1.10 per euro. You record an $11,000 payable. By March 1, the rate has moved to $1.05. You now need only $10,500 to buy €10,000 and pay the invoice. The $500 difference is a Section 988 ordinary gain.

A receivable example: you invoice a U.K. customer for £5,000 when the pound is at $1.30, recording a $6,500 receivable. When the customer pays, the pound has slipped to $1.20, and the £5,000 converts to $6,000. You have a $500 Section 988 ordinary loss.

Debt instruments are more involved because principal and each interest payment are calculated separately, each using the exchange rate on the accrual date compared with the rate on the payment date. The gain or loss is recognized when a payment is actually made or received, not while the obligation sits on your books.

Which Exchange Rate To Use

The IRS does not publish an official exchange rate. It accepts any posted rate as long as you use it consistently.⁴ Use the rate prevailing on the date you receive, pay, or accrue the item, and when more than one rate exists for the same currency on the same day, pick the one that most properly reflects your income.⁵

Common rate sources include your bank, the Federal Reserve, Treasury’s published rates, and providers like Oanda and XE.⁵ Pick one and stay with it. Switching sources to find favorable numbers is the kind of thing that invites a closer look.

The Capital Gain Election for Currency Contracts

Section 988 provides one narrow escape from ordinary treatment, and it is only available for foreign currency forward contracts, futures contracts, and options. Trade payables, trade receivables, debt instruments, and currency dispositions are permanently ordinary with no election available.¹

To make the election, two conditions must be met. The contract has to be a capital asset in your hands and cannot be part of a straddle. And you have to identify the transaction on your books and records as one you are electing capital treatment for before the close of the day you enter into it. Miss that same-day identification window and the contract is locked into ordinary treatment.

If the election is properly made, the gain or loss is capital, with the normal holding period rules deciding short-term versus long-term. The election has to be applied consistently across similar instruments. You cannot elect capital treatment on winning contracts while letting losing contracts fall back to ordinary for a full deduction.

Vacation Money and the $200 Rule

Section 988 does not apply to personal transactions by individuals. A personal transaction is one where the expenses would not be deductible as business or investment expenses.¹ Buying euros for a vacation and converting the leftover cash back to dollars at a better rate is personal.

For these personal currency dispositions, a $200 de minimis rule applies. If your gain from the exchange rate change is $200 or less, you do not need to recognize it. If the gain exceeds $200, the entire amount is taxable, not just the piece above $200, and because the transaction sits outside Section 988, that gain is capital rather than ordinary.¹

Losses on personal currency conversions are not deductible. General tax rules disallow losses on personal-use property, and leftover travel money qualifies. Gains above $200 are taxable; losses give you nothing.

Cryptocurrency Is Not Foreign Currency

If you are trading Bitcoin or other digital assets, Section 988 is not the rule that applies. The IRS treats virtual currency as property, not as real currency, so the general property transaction rules govern instead.⁶ Gains and losses are capital, with short-term or long-term treatment based on your holding period, not Section 988 ordinary gains and losses.

Hedging and the Foreign Tax Credit

When a business hedges a foreign currency exposure with a matching financial instrument, Section 988(d) allows the hedge and the underlying transaction to be integrated and treated as a single unit, so no separate exchange gain or loss is recognized on either leg during the period they are linked.⁷ A foreign-currency loan paired with a forward contract that locks in the dollar repayment cost can be treated as a synthetic dollar loan. A hedge on an executory purchase order becomes an adjustment to the cost of the goods rather than a standalone currency item. The integration requires identification and documentation at the outset. Fail to identify, and each leg is treated independently under the default rules.

Section 988 gain or loss is sourced by reference to the taxpayer’s residence, so for a U.S. resident, Section 988 gains are U.S. source income and losses are U.S. source losses.⁸ That matters for the Foreign Tax Credit, which is capped at the share of your total U.S. tax that corresponds to your foreign source taxable income divided by your worldwide taxable income.⁹ A large Section 988 gain increases your U.S. source income without raising your foreign source income, which shrinks the fraction and reduces the credit you can use. A large Section 988 loss cuts your worldwide income and can distort the fraction the other way.¹⁰ Qualified business units operating outside the United States are the exception; their Section 988 gain or loss is sourced to the QBU’s principal place of business, which generally makes it foreign source.

1
Office of the Law Revision Counsel. 26 USC 988 – Treatment of Certain Foreign Currency Transactions
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Office of the Law Revision Counsel. 26 US Code 985 – Functional Currency
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Office of the Law Revision Counsel. 26 US Code 1211 – Limitation on Capital Losses
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Internal Revenue Service. Yearly Average Currency Exchange Rates
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Internal Revenue Service. Foreign Currency and Currency Exchange Rates
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Internal Revenue Service. Frequently Asked Questions on Virtual Currency Transactions
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eCFR. 26 CFR 1.988-5 – Section 988(d) Hedging Transactions
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eCFR. 26 CFR 1.988-4 – Source of Gain or Loss Realized on a Section 988 Transaction
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Office of the Law Revision Counsel. 26 US Code 904 – Limitation on Credit
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Internal Revenue Service. FTC Limitation and Computation