Section 988 gain or loss on foreign currency property: 2026 tax guide

Under IRC Section 988, gains and losses arising from fluctuations in exchange rates on nonfunctional currency transactions are generally treated as ordinary income or loss – not capital gain – which can significantly affect your US tax bill.

If you hold a foreign mortgage, maintain a bank account in local currency, or earn income denominated in a currency other than the US dollar, Section 988 likely applies to at least some of your transactions.

The rules determine how those currency movements are taxed, where you report them, and what documentation you need.

This guide walks through the core mechanics of Section 988, the calculation process, reporting requirements, and the most common scenarios US expats encounter – including foreign property sales, forex trading, and partnership K-1 items.

What is Section 988 gain or loss?

A Section 988 gain occurs when the foreign currency appreciates against the dollar between the time you enter into a transaction and the time you settle it.

A Section 988 loss occurs when the foreign currency depreciates over that same period.

Under Internal Revenue Code Section 988, gains and losses from foreign currency transactions are generally treated as ordinary income or loss.

That means they are taxed at your marginal income tax rate – the same rate that applies to wages and salary – rather than at the lower preferential rates available for long-term capital gains.

An expat who sells a foreign home financed with a foreign-currency mortgage may have a currency gain or loss on the debt itself, separate from the gain or loss on the home. Whether that currency item is ordinary Section 988 income or something else depends on how the mortgage was used – covered in detail below.

 

What is a Section 988 transaction?

Every Section 988 foreign currency transaction must be converted to US dollars at the spot rate on the relevant date.

IRC Section 988 applies to a specific set of transactions involving nonfunctional currencies, and understanding which transactions qualify is the essential first step for any US taxpayer with foreign financial activity.

Section 988 transactions include any transaction where the amount paid or received is denominated in a nonfunctional currency. The four main categories are:

• Acquiring or disposing of nonfunctional currency itself
• Accruing income or expense items denominated in a nonfunctional currency
• Entering into or acquiring a debt instrument denominated in a nonfunctional currency
• Entering into certain forward contracts, futures contracts, options, or similar instruments referenced to a nonfunctional currency

A nonfunctional currency is any currency other than the taxpayer's functional currency. For most US individual taxpayers, the functional currency is the US dollar.

Correctly reporting the timing of foreign income and taxes paid on your US return is essential.

The spot exchange rate on the specific transaction date determines whether you recognize a Section 988 gain or loss.

There is a limited exception for personal transactions.

Under Section 988 subsection e, gains from disposing of nonfunctional currency in a personal transaction – such as exchanging leftover euros after a vacation – are not recognized unless the gain exceeds $200.

 

How Section 988 applies to foreign property: The core mechanics

Foreign property ownership creates two distinct taxable events for US taxpayers: the gain or loss on the asset itself under Section 1001, and a potentially separate Section 988 currency gain or loss on any nonfunctional-currency debt used to finance it.

This Section 988 treatment applies only when the debt finances a rental or business property; a mortgage on a personal residence is not a Section 988 transaction (IRC Section 988(e); Revenue Ruling 90-79).

Based on a common TFX client scenario: A US expat purchases a home in France for EUR 400,000 as a personal residence, financed with a euro-denominated mortgage. Five years later, the expat sells the home and repays the mortgage. The euro has strengthened against the dollar during that period.

Two separate calculations are required:

• Section 1001 – property gain or loss. The gain or loss on the home itself – the difference between the sale price and the adjusted basis, both converted to USD at the applicable exchange rates.
• Currency gain or loss on the mortgage. Because this is a personal-residence mortgage, this isn't a Section 988 item – the pre-988 rules apply instead. A resulting loss is a nondeductible personal loss under section 165(c), with no $200 minimum. The ruling itself addresses only a loss; a gain is generally treated as ordinary income in practice – confirm with a tax professional.

If the mortgage instead financed a foreign rental property, the currency gain or loss on that debt would be a genuine Section 988 item, and a loss would be deductible.

The Section 1001 component may qualify for long-term capital gains treatment if the property was held for more than one year.

A Section 988 expense arises when the foreign currency strengthens, increasing the dollar cost of repaying a foreign-currency obligation.

If the euro appreciates from 1.10 to 1.20 USD/EUR between origination and repayment, the borrower pays more dollars to retire the same euro-denominated debt – producing a Section 988 loss.

The Section 988 gain or loss equals the difference between the USD value of the foreign-currency obligation at origination and its USD value at settlement, converted at the applicable spot rates.

A common Section 988 transaction example involves a US expat who purchases a personal home in Europe with a euro-denominated mortgage. (A rental property financed the same way would be a true Section 988 transaction.) The currency gain or loss on the mortgage is entirely separate from any gain or loss on the home itself.

 

The IRS publishes average rates for convenience, but Section 988 requires the rate on the actual transaction date.

Is Section 988 income ordinary or capital? Character rules explained

The default Section 988 gain or loss tax treatment is ordinary income or loss.

The single most important tax consequence of Section 988 is character: currency gains are ordinary income, meaning they are taxed at the same rates as wages.

They do not qualify for the lower preferential rates that apply to long-term capital gains.

This applies regardless of how long the taxpayer held the underlying asset or currency. An expat who held a foreign mortgage for 15 years still recognizes ordinary income – not long-term capital gain – on the currency movement at repayment.

Contrast this with Section 1256 contracts, which receive 60/40 capital treatment – 60% long-term, 40% short-term. Section 988's ordinary character rule applies even to gains that might otherwise seem like long-term capital gains.

IRC Section 988 income is taxed at your marginal ordinary income rate.

For a taxpayer in the 37% bracket, a $50,000 Section 988 gain produces $18,500 in federal tax – and, if the gain is also net investment income, an additional $1,900 in Net Investment Income Tax, for a combined cost of $20,400. The same gain treated as long-term capital gain would generally be taxed at 20%, or $10,000, plus the same 3.8% NIIT of $1,900, for a combined cost of $11,900.

Is Section 988 income passive or nonpassive?

Section 988 currency gains and losses are generally nonpassive, and they can't be used to offset passive activity losses from rental properties or other passive investments under IRC Section 469, unless the underlying activity generating the currency exposure is itself passive.

Whether a specific Section 988 item is further categorized as portfolio income depends on the facts; confirm the characterization on your K-1 or with a tax professional.

This distinction matters for expats who own foreign rental property financed with foreign-currency debt.

The rental income may be passive, but the Section 988 currency gain on the mortgage is generally nonpassive – meaning the two cannot offset each other under the passive activity rules.

Difference between Section 987 and 988

US expats and international business owners often encounter both Section 987 and Section 988, but the two provisions address fundamentally different currency-related tax situations.

The key difference between Section 987 and 988 is that Section 987 governs currency translation for foreign branches and qualified business units – known as QBUs – while Section 988 governs currency gains and losses on specific transactions.

 

Section 987 governs currency translation gains and losses for foreign branches and QBUs, while Section 988 governs currency gains and losses on specific transactions – the two rules can apply simultaneously to the same taxpayer.

A US expat who operates a foreign branch may have Section 987 items and may separately have Section 988 items from qualifying foreign-currency transactions. A foreign-currency mortgage on a personal residence is generally outside Section 988, while debt connected with a rental, business, or investment activity may fall within Section 988.

The mark-to-market election and Section 1256 interplay

The interaction between IRC Section 988 and Section 1256 is one of the most consequential – and most misunderstood – areas of foreign currency taxation for active traders and investors.

Certain foreign currency contracts that would otherwise be Section 988 transactions may instead be treated as Section 1256 contracts if they are regulated futures contracts or nonequity options traded on a qualified board or exchange.

Under Section 1256, gains and losses receive 60/40 treatment: 60% long-term capital gain, 40% short-term capital gain – regardless of how long the position was held.

The 60/40 split is generally more favorable than Section 988 ordinary treatment. A taxpayer in the 37% bracket who recognizes a $100,000 gain pays a blended rate of approximately 26.8% under Section 1256, compared to 37% under Section 988.

Section 988 forex gains and losses are treated as ordinary income by default. Regulated futures contracts and nonequity options that would be marked to market under Section 1256 are generally excluded from Section 988 unless the taxpayer elects otherwise. Those Section 1256 contracts generally receive 60/40 treatment. Separately, an eligible Section 988 forward contract, futures contract, or option may qualify for an election to treat its currency gain or loss as capital, but that election does not by itself create Section 1256 treatment.

The IRS has issued guidance clarifying that over-the-counter forex transactions are generally Section 988 transactions unless the taxpayer makes a valid election.

 

Where to report Section 988 gain or loss on Form 1040

Section 988 gain or loss reporting requires careful identification of each transaction on your return.

There is no dedicated Section 988 form – gains and losses are reported on Schedule 1 or directly on Form 1040.

The reporting path works as follows:

1. Individual taxpayers: Section 988 gains and losses are generally reported on Schedule 1, Form 1040, Line 8z – Other Income. Gains increase your income; losses reduce it
2. Transaction identification: Include a written statement identifying the transaction as a Section 988 item, the amount of the gain or loss, and the exchange rates used
3. Partnership items: Section 988 gains flowing through a partnership are reported on Schedule K-1 from Form 1065 and carried to the appropriate line of your Form 1040
4. No standalone form: The IRS has no dedicated form for Section 988 – the reporting is narrative and statement-based

Section 988 gains are reported as ordinary income on Schedule 1 of Form 1040 – there is no standalone IRS form, so a clear written statement identifying the transaction is essential.

Knowing where to report foreign income on Form 1040 is critical, because errors in placement can trigger notices or audits.

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Section 988 loss reportable transactions: when losses trigger extra disclosure

Not all Section 988 losses are created equal: losses that exceed the IRS threshold for reportable transactions require a separate disclosure filing, and missing this requirement carries its own set of penalties.

A Section 988 loss reportable transaction triggers Form 8886 disclosure. Large Section 988 losses may qualify as "loss transactions" under Treasury Regulation Section 1.6011-4, which requires additional disclosure on Form 8886 – the Reportable Transaction Disclosure Statement.

The thresholds for individuals are significantly lower than the standard loss transaction thresholds:

• Section 988 losses: $50,000 or more in a single tax year
• Standard loss transactions: $2 million in one year, or $4 million across multiple years

A Section 988 loss that meets the IRS threshold must be disclosed on Form 8886 – failure to file this form can result in substantial penalties on top of any tax owed.

Section 988 loss reporting follows the same path as gains and is generally reported on Schedule 1, Line 8z of Form 1040. The Form 8886 disclosure is an additional filing requirement on top of the standard reporting.

 

Section 988 and foreign bank accounts: currency gains on deposits

US expats who hold foreign bank accounts in local currency face a two-layer compliance obligation:

• Section 988 tax: Any currency gain realized when converting the account balance back to USD is ordinary income
• Separate reporting: The account itself may trigger FBAR and FATCA filing requirements, independent of any Section 988 tax liability

How currency gains arise on foreign deposits

Interest-bearing foreign bank accounts denominated in a nonfunctional currency can generate Section 988 gains or losses when the account balance is converted back to USD.

The exchange rate at the time of withdrawal or conversion may differ from the rate when the funds were deposited.

Even a simple foreign savings account can produce a Section 988 ordinary income item if the local currency appreciated against the dollar between deposit and withdrawal – a surprise tax bill many expats do not anticipate.

The existence of such accounts may also trigger FBAR and FATCA reporting obligations independently of any Section 988 tax liability.

Section 988 and foreign mortgages: The most common expat scenario

For US expats who financed a foreign personal home purchase with a local-currency mortgage, the currency gain or loss on that debt is often overlooked, and it works differently than most Section 988 material suggests.

A mortgage on a home you live in isn't a Section 988 transaction. Under IRC Section 988(e) and Revenue Ruling 90-79, Section 988 only reaches transactions with expenses allocable to a trade, business, or investment activity, and a personal residence doesn't qualify.

Instead, the pre-1986 rules apply: a resulting loss on repayment is a nondeductible personal loss, with no $200 minimum for this exception. A resulting gain's character isn't addressed by the ruling itself, though it's generally treated as ordinary income in practice – confirm with a tax professional before filing.

TFX client scenario

A US citizen living in Germany takes out a euro-denominated mortgage to purchase a home. When the home is sold years later, and the mortgage is repaid, the USD equivalent of the mortgage principal has changed due to exchange rate movement.

If that change produced a gain, there is no $200 threshold for this personal-transaction exception, though the gain's character remains unclear. If it produced a loss, that loss isn't deductible, even if the property itself was sold at a loss; the two amounts can't be netted against each other.

This is one of the most common, and most misunderstood, scenarios TFX handles for expat clients. A Section 988 foreign mortgage on a rental or business property is treated differently from a personal-residence mortgage: it creates a genuine currency gain or loss on the debt itself, and a loss is deductible as an ordinary loss.

The Section 988 election out: Opting for capital gains treatment

Taxpayers who prefer capital gains treatment on certain foreign currency transactions can elect out of Section 988, but the election rules are strict, and the window to act is narrow.

The Section 988 election out of ordinary treatment is a same-day, pre-transaction election – there is no retroactive option, and missing the deadline means ordinary income treatment applies by default.

Which transactions qualify for the election?

• The election applies only to certain identified nonfunctional currency transactions – primarily forward contracts, futures, and options that are not Section 1256 contracts
• The election must be made before the close of the day on which the transaction is entered into
• The taxpayer must maintain contemporaneous records identifying the transaction as subject to the election
• Once made, the gain or loss is treated as capital rather than ordinary

The election is not available for debt instruments or accounts receivable/payable. A foreign mortgage, for example, cannot be elected out of Section 988 treatment.

IRC Section 988 and its regulations (Treasury Regulation Sections 1.988-1 through 1.988-6) govern reporting and elections for foreign currency transactions – there's no dedicated IRS publication devoted to Section 988.

Section 988 for forex traders: Ordinary income on currency trades

For active forex traders, Section 988 is the default tax regime, and it is rarely the most favorable one – understanding the interaction with Section 1256 is essential before filing.

Retail forex traders whose trades do not qualify as Section 1256 contracts are subject to Section 988 ordinary income treatment on all gains and losses. This means forex trading profits are taxed at marginal income tax rates, not preferential capital gains rates.

Retail forex traders who do not qualify for Section 1256 treatment pay ordinary income tax on every profitable trade – making the character election one of the most valuable planning decisions in forex taxation.

OTC forex vs. exchange-traded contracts

Traders who qualify for Section 1256 treatment – regulated futures contracts on a qualified exchange – receive the 60/40 split. Over-the-counter forex transactions are generally Section 988 transactions unless the taxpayer makes a valid election.

A narrow qualified-fund rule under Section 988(c)(1)(E) can automatically treat bank forward contracts and foreign-currency futures held by a qualifying partnership as Section 1256 contracts.

To get that treatment, the partnership must first elect "qualified fund" status under Section 988(c)(1)(E)(iii)(V) – once made, the election carries forward to future years until revoked with IRS consent.

There's no separate election for a qualifying fund to opt out of the Section 1256 treatment itself. These qualified-fund currency contracts get 100% short-term treatment, not the usual 60/40 split. Separately, Section 988(c)(1)(D) already excludes regulated futures contracts and nonequity options that would be marked to market under Section 1256, with no separate election needed.

Confirm treatment with a tax professional before relying on either provision.

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Section 988 gains reported on Schedule K-1: Partnership and S-Corp investors

Passive investors in partnerships or funds with foreign currency exposure may be surprised to find Section 988 ordinary income items on their Schedule K-1, requiring careful attention when preparing their individual returns.

Investors in partnerships or S-corporations that engage in foreign currency transactions receive their share of Section 988 gains or losses on Schedule K-1. The K-1 typically identifies the item as Section 988 ordinary income or loss in the supplemental information section.

If your partnership K-1 includes a Section 988 currency gain, it flows to your Form 1040 as ordinary income – not as a capital gain – regardless of how long the partnership held the underlying position.

A Section 988 gain on your K-1 from a foreign partnership flows through as ordinary income on your Form 1040. A Section 988 item reported through a partnership or S corporation must be carried to the individual return according to the Schedule K-1 instructions and the character and activity of the item. Do not automatically report every pass-through Section 988 item on Schedule 1, line 8z.

Verifying Section 988 items on your K-1

IRC Section 988 gain reporting starts with identifying the transaction date and the applicable spot exchange rate.

When reviewing your K-1, verify that the reporting entity used the correct spot rate for each Section 988 transaction – errors at the partnership level flow through to your individual return.

Source of Section 988 income: US-source vs. foreign-source rules

The source characterization of Section 988 income matters for expats who rely on the foreign tax credit. For US expats whose tax home is abroad, Section 988 gain or loss is generally foreign-source, not US-source, which changes how it interacts with the foreign tax credit basket.

The source of Section 988 gain or loss is determined by the residence of the taxpayer, not the location of the transaction. Under Internal Revenue Code Section 988(a)(3)(B), an individual's residence for this purpose is the country of their tax home, as defined for the Foreign Earned Income Exclusion, not automatically the United States.

If your tax home is abroad, your Section 988 gain is generally foreign-source. Only if you have no tax home at all does the statute default your residence to the United States.

For US taxpayers whose tax home is in the United States, Section 988 gains are US-source income and cannot be sheltered by foreign tax credits.

For expats with a foreign tax home, the gain is generally foreign-source instead, so confirm your tax home status with a tax professional before assuming either treatment.

Impact on the foreign tax credit

Under IRC Section 904, foreign tax credits are limited to the portion of your US tax liability attributable to foreign-source income. Whether a Section 988 gain increases your foreign tax credit capacity or falls outside it depends on your tax home, as explained above.

TFX handles foreign property sales, mortgages, and currency gains for expats worldwide.

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Common Section 988 mistakes and how to avoid them

Treating a Section 988 ordinary gain as a capital gain can create a tax underpayment. For tax year 2025, a 20% accuracy-related penalty may apply if the statutory requirements are met, although reasonable-cause and good-faith relief may be available.

Here are the five most common errors:

1. Failing to separate the Section 988 currency gain from the Section 1001 property gain on a foreign home sale. These are two distinct items with different character and reporting requirements
2. Treating Section 988 gains as capital gains and applying preferential rates. Section 988 gains are ordinary income – always, unless a valid pre-transaction election was made
3. Missing the Form 8886 disclosure requirement for large Section 988 losses. For tax year 2025, a Section 988 loss of at least $50,000 for an individual or trust can meet the Form 8886 loss-transaction threshold. IRS exceptions apply to certain losses, including some qualifying-basis and mark-to-market losses, so the threshold alone does not make every Section 988 loss reportable.
4. Using the wrong exchange rate. Section 988 requires the spot rate on the date of the specific transaction – not the IRS annual average rate, not an average for the month
5. Failing to report Section 988 items that flow through a partnership K-1. These items appear in the supplemental information section and are easy to overlook

Section 988 and like-kind exchanges: can you defer currency gains?

No. Section 988 gains are ordinary income items outside the scope of Section 1031.

The deferral available for real property exchanges under Section 1031 covers only the Section 1001 gain on the property.

It does not extend to the separate Section 988 ordinary gain on any foreign-currency debt that is assumed or repaid as part of the exchange.

Section 988 recordkeeping: what documentation you need

Without contemporaneous exchange rate documentation, a Section 988 calculation cannot be verified – and the IRS may disallow a loss or assert a higher gain based on its own rate determination.

Accurate Section 988 transaction reporting requires contemporaneous exchange rate documentation. The records you need:

1. The original loan or account documents showing the principal amount in foreign currency
2. The spot exchange rate on the date the debt was incurred or the account was opened, sourced from the Federal Reserve or a recognized financial data provider
3. The spot exchange rate on the date of repayment, conversion, or disposition
4. Bank statements or closing documents confirming the amounts
5. Any election statements filed contemporaneously

 

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