Section 987 Currency Gain or Loss, Explained

Short answer: Section 987 governs a foreign branch or disregarded entity that keeps its books in a different currency from its owner. It does two jobs: it translates the branch's profit into the owner's currency each year, and it taxes the currency gain or loss on the owner's investment in the branch, generally when the branch sends money home. After decades of false starts, final regulations took effect for 2025. On 13 August 2026 Treasury proposed an election under which most CFCs would stop computing that remittance gain or loss altogether, with a gain-only safeguard for inbound liquidations and reorganisations.

What Section 987 does

Section 987 starts with the qualified business unit (QBU). Under §989(a), a QBU is a separate and clearly identified unit of a trade or business that keeps separate books and records. In practice that means a foreign branch, or a foreign entity that is disregarded for US tax purposes (a checked-the-box S.à r.l. or B.V., for example) and runs a business. Each QBU has a functional currency under §985, generally the currency of its main economic environment.

A section 987 QBU is a QBU whose functional currency differs from its owner's. Two common cases:

a US corporation, whose functional currency is the dollar, runs a German branch that keeps its books in euros; and
a UK CFC with sterling as its functional currency owns a disregarded Dutch subsidiary that keeps its books in euros.

The statute then does three things. Under §987(1) and (2), the QBU's taxable income is computed in its own currency and translated into the owner's currency. Under §987(3), the owner makes "proper adjustments" for transfers between the two: in practice, it recognises section 987 gain or loss when the QBU makes a remittance (sends property back to its owner) or terminates. That gain or loss is ordinary, and it is sourced by reference to the income of the QBU.

The reason for §987(3) is that a branch is not a separate taxpayer. Without it, the exchange-rate swing on the owner's capital in the branch would never be measured, because there is no stock to sell.

Almost forty years without workable rules

Section 987 was enacted in 1986, but final rules that taxpayers actually had to apply only arrived for 2025. Proposed regulations in 1991 used an equity pool and a basis pool. They were withdrawn and replaced in 2006 by a balance-sheet method, finalised in 2016 (TD 9794), and then deferred several times. In the meantime most taxpayers used any reasonable method consistently applied.

The December 2024 final regulations

Treasury published TD 10016 in the Federal Register on 11 December 2024 (effective 10 December). The rules generally apply to taxable years beginning after 31 December 2024, so 2025 for calendar-year taxpayers, with optional early application to years ending after 9 November 2023. They apply to individuals, domestic corporations and CFCs with at least one US shareholder. Partnerships and S corporations are covered only in part and otherwise use a reasonable method.

The default: a balance-sheet method

Each year the owner computes its net unrecognised section 987 gain or loss for each section 987 QBU using a ten-step method in §1.987-4. Broadly, it measures the change in the QBU's net value in the owner's currency over the year, then strips out the QBU's income and the net transfers between the QBU and its owner; what is left is the currency effect. Financial assets and liabilities (cash, receivables, payables, debt) are marked items and move with the spot rate; other assets such as fixed assets and inventory are historic items and keep the rate at which they were acquired. When the QBU makes a remittance, the owner recognises a proportionate share of the accumulated amount.

The elections

Current rate election. All items are treated as marked items, so the owner no longer tracks historic rates. The catch: section 987 loss on a remittance is generally suspended and recognised only to the extent of section 987 gain in the same year or a three-year lookback period. A de minimis exception applies where the loss would be less than the lesser of $3 million or 2% of gross income, tested across the controlled group.
Annual recognition election. The owner recognises all of its unrecognised section 987 gain or loss every year, so it never has to compute remittances, and the deferral and loss suspension rules generally fall away.
Both elections are locked in for 60 months: they cannot be revoked within that period without the IRS's consent.

Elections are made on Form 8964-ELE, Section 987 Elections, attached to the return. For a CFC, the controlling domestic shareholders make them. The QBU's activity, including its balance sheet on Schedule F, is reported on Form 8858.

Transition: pretransition gain or loss

Gain or loss that built up before the new rules (pretransition gain or loss) is not wiped out. A taxpayer that used an eligible earlier method measures it by a deemed termination of the QBU; otherwise it is computed under a simplified method looking back to taxable years beginning after 7 September 2006. The old "fresh start" method, which would have erased it, is no longer available by choice. Taxpayers can elect to recognise pretransition gain or loss ratably over ten years. Notice 2025-72 (25 November 2025) said this would be restated as 120 months, so that a short taxable year does not pull in a full tenth; the August 2026 proposed regulations contain that rule.

Notice 2026-17: simplification announced

On 25 February 2026 Treasury and the IRS issued Notice 2026-17 (2026-12 IRB 698), announcing proposed regulations to simplify the 2024 rules. It covered:

An equity and basis pool method, close to the 1991 approach: an equity pool in the QBU's currency, a basis pool in the owner's currency, one net remittance computation per year (not daily), and income translated at the yearly average rate. It is available only with a current rate election in effect, and not for QBUs held through partnerships or S corporations, although a consistent method is treated as reasonable for them.
Narrower loss suspension. The suspension rules would apply only in a year in which the remittance proportion exceeds 5% or the loss that would be suspended exceeds $5 million.
Fewer recognition groupings. Suspended loss could be released against section 987 gain in any category. For CFCs there would be four groupings: tentative tested income, subpart F income, ECI excluded under §952(b), and other income.
A narrower successor rule for deferred gain or loss, and wider hedging relief, covering hedges that do not meet the GAAP hedge accounting requirement (with identification relief for hedges entered into before 26 April 2026).
A preview of the CFC election, described only in outline.

Taxpayers can rely now on the first four items, provided they and their section 987 electing group apply them in their entirety and consistently. Equity and basis pool elections in reliance on the notice are made with a statement titled "Section 987 Equity and Basis Pool Method Election" attached to Form 8964-ELE. The notice did not allow reliance on the CFC election.

The August 2026 proposed regulations

The CFC election arrived as REG-103844-26, Foreign Currency Gain or Loss of Controlled Foreign Corporations, filed with the Federal Register on 13 August 2026, published on 14 August 2026 (91 FR 52553) and reprinted in IRB 2026-37. Comments are due by 12 November 2026.

What the CFC exemption election does

For taxable years in which the election applies, an exempt CFC generally does not compute or recognise section 987 gain or loss: no ten-step computation, no remittance calculations, no deferred or suspended loss tracking. Sections 987(1) and (2) still apply, so the CFC still translates each QBU's income when computing its own taxable income and earnings and profits, which feed subpart F and NCTI. To keep that simple, a current rate election is deemed to be in effect: QBU income is translated at the yearly average rate and transfers at the spot rate.

Treasury's reasoning is that a CFC may have a non-dollar functional currency anyway, and that the economic currency gain or loss should eventually reach the US shareholders through other provisions, for example on a taxable sale of the CFC's stock. It is a narrowing, not a repeal: by default §987(3) still applies to CFCs. Treasury estimates about 1,500 taxpayers and 4,500 QBUs are affected, with compliance savings of roughly $16 million a year.

Who elects, and the consistency rules

The election is made by the CFC's controlling domestic shareholders, with a statement titled "Section 987 CFC Exemption Election" attached to Form 8964-ELE. Once made, it can be revoked only with the IRS's consent.

It must be made consistently. All CFCs majority-owned by the same US shareholder already move together, and the proposed rules go further: all affiliated domestic corporations must make the same choice for their majority-owned CFCs. That reaches separate consolidated groups under a common foreign parent, and domestic corporations that would be in one consolidated group but for an intervening partnership. CFC stock held through a domestic partnership is treated as owned indirectly by its partners, and anti-avoidance rules stop related-party transactions designed to dodge consistency or force a revocation. Treasury is still studying how consistency should work when a CFC is bought from an unrelated party.

When to elect

Taxable year	How and when
Beginning in 2025	Statement with the original, timely filed return (including extensions), or with an amended return filed by 15 October 2027
Beginning after 31 December 2024 and ending in 2026	Statement with the original, timely filed return (including extensions)
Ending in 2027	Statement filed on or before 15 October 2027
Ending after 31 December 2027	Statement filed before the taxable year starts (by 31 December 2027 for a calendar 2028 year)

So until 15 October 2027 a calendar-year taxpayer can still elect for 2025, 2026 or 2027. There is one more route: for the year in which the election first becomes relevant, meaning the first year beginning after 2024 in which the electing group includes a CFC that owns a section 987 QBU, the election can be made with that year's original, timely filed return. That helps a group that acquires its first such CFC, but only if it did not already own a majority of another CFC with a section 987 QBU in an earlier year beginning after 2024.

Pre-election gain or loss

Electing does not erase what has already built up. If the election is made for the first year the 2024 rules apply (2025 for calendar-year taxpayers), the pretransition rules above still apply, and the taxpayer is deemed to make the 120-month amortisation election for its exempt CFCs.

If the election is made for a later year, the exempt CFC computes pre-election section 987 gain or loss for each QBU as at the end of the previous year: its net unrecognised section 987 gain or loss, plus any deferred gain or loss and suspended loss, less amounts recognised in that year. It then recognises the total ratably over 120 months from the first day of the election year. Commenters asked to be allowed to skip this; Treasury refused, because taxpayers sitting on gains would elect to wipe them out while those sitting on losses would amortise them.

$50 million exception. A QBU whose average total assets over the three years before the first election year are under $50 million is deemed to have zero pre-election (or, for a transition-year election, pretransition) gain or loss. Assets are taken from the US GAAP balance sheet reported on Form 8858, Schedule F, without tax adjustments, and a CFC's QBUs resident in the same country are added together. Treasury expects this to exempt about 75% of section 987 QBUs while excluding under 5% of QBU assets.
Annual recognition electors usually have little or nothing left to amortise, because their gain or loss was recognised each year.
Two loss traps. Pre-election loss becomes suspended if the election is revoked within the first 60 months of the amortisation period, or if the exempt CFC is sold out of the group while the loss relates to a QBU owned by another group member.
If the election ends, every QBU is treated as newly formed on the first day of that year, so there is no catch-up computation for the exempt years.

Partnerships owned by CFCs

An exempt CFC also stops computing section 987 gain or loss on QBUs it holds through a partnership. A partnership that owns a section 987 QBU and is at least 80% owned (by capital or profits) by exempt CFCs in the same controlled group is an exempt partnership and is treated the same way. Both must still apply §987(1) and (2) using a reasonable, consistent method. An exempt partnership's pre-election gain or loss is taken into account by its partners over 120 months, so it cannot shift to a new partner, and partners adjust their outside basis as it is recognised.

The inbound safeguard

Switching off remittance gain creates one gap. Without historic-rate tracking, assets that come out of a QBU take a basis translated at the current rate, so if the QBU's currency has appreciated, the CFC's basis rises with it and no gain is taxed. In an inbound liquidation or reorganisation described in §1.367(b)-3(a), such as a section 332 liquidation of a CFC into its US parent (including one deemed by a check-the-box election), that stepped-up basis would come into the US free of tax.

So under proposed §1.987-16 the transferor CFC recognises section 987 gain equal to its section 987 asset basis immediately before the transaction. It is gain only: no loss is allowed, matching the long-standing one-way approach of §1.367(b)-3. The test applies whatever the taxpayer's motive, and the gain does not increase the US acquirer's basis in the assets it receives. The CFC picks one of two measures:

Lookback method: net unrecognised section 987 gain computed under the simplified method in §1.987-10(e)(3) for taxable years ending in the 72 months before the transaction, ignoring years before the election. The notice had floated ten years; commenters pushed for less.
Excess asset basis method: the excess asset basis computed under §1.367(b)-3(g)(2)(i). It uses figures available at the time but can overshoot, because excess asset basis can arise for reasons other than currency.

There is a de minimis rule: nothing is computed if the aggregate tax basis of the transferor CFC's assets is under $25 million. Stock in lower-tier subsidiaries is generally left out, unless it was received in exchange for other assets in the previous 120 months, so dropping a QBU into a subsidiary does not get around the test.

Reliance and applicability

As proposed, the rules would apply to taxable years ending on or after the date final regulations are filed with the Federal Register, and the inbound rule to transactions completed in the US acquirer's taxable years ending on or after that date. Until then, taxpayers may rely on the proposed regulations for taxable years beginning after 31 December 2024, provided they and every member of their consolidated group and section 987 electing group follow them consistently, for that year and all later years before finalisation. Relying means taking the whole package, including the inbound rule. The 120-month amortisation rule can be relied on separately; it is proposed to apply to taxable years beginning after 31 December 2024 and ending on or after 25 November 2025.

What is still to come

The Notice 2026-17 simplifications (equity and basis pool, narrower loss suspension, fewer groupings, successor and hedging changes) have not yet been proposed. The August preamble says they will come in a future notice of proposed rulemaking; reliance on the notice continues meanwhile.
Pretransition gain or loss. Proposed regulations published on 3 August 2026 (REG-115145-25, on the section 898(c) transition rule that follows the repeal of the one-month deferral election, also in IRB 2026-37) said a separate section 987 proposal on recognising pretransition gain or loss would follow. REG-103844-26 now contains that 120-month rule, so that item is no longer outstanding.
Open questions flagged for comment: acquisitions of CFCs by groups with different elections, coordination with the One, Big, Beautiful Bill Act's changes to the pro rata share rules, partnership basis on a sale during the amortisation period, alternative ways to measure section 987 asset basis, and other de minimis tests.
Recurring disregarded transactions. The proposed rules issued with the 2024 final regulations (REG-117213-24) had not been finalised when the August 2026 proposals were issued.

What it means for funds

Private equity. The election matters where a portfolio company group owns a CFC that runs a branch or disregarded entity in another currency, such as a UK CFC with a euro-functional German branch. For 2025 the decision can still be made on an amended return, but the pre-election or pretransition numbers have to be modelled first. Before an exit or pre-sale clean-up that collapses a CFC into its US parent, check the inbound rule and the $25 million test.
Acquisitions. A CFC that joins a section 987 electing group is deemed to conform to the group's elections. Diligence should ask which section 987 elections the target made, and whether selling it out of a group would turn any pre-election loss into suspended loss.
Private credit and real estate. Lending and property structures often use disregarded vehicles with euro or sterling books. The election only helps where the QBU sits under a CFC. A QBU owned directly by a US fund partnership or a US corporation stays under the full regime: the partnership rules or the 2024 final regulations, plus Notice 2026-17 if relied on.
Fund partnerships in the chain. Because CFC stock held through a domestic partnership counts as held by its partners, map who the controlling domestic shareholders are, and which groups the consistency rules tie together, before deciding.

Worked example

Illustrative facts. A US corporation with a calendar year owns 100% of UK Ltd, a CFC with sterling as its functional currency. UK Ltd owns a disregarded German GmbH that keeps euro books, so the GmbH is a section 987 QBU of UK Ltd.

Without the election, UK Ltd computes net unrecognised section 987 gain or loss on the GmbH each year and recognises a share whenever the GmbH sends cash up, and that amount flows into UK Ltd's tested income or subpart F income.
With the election for 2026, UK Ltd computes pre-election gain or loss at 31 December 2025. If the GmbH's average GAAP total assets for 2023 to 2025 were under $50 million, it is deemed zero. Otherwise it is recognised over 120 months from 1 January 2026. After that, GmbH dividends to UK Ltd produce no section 987 gain or loss.
If the US parent later liquidates UK Ltd into itself, UK Ltd recognises section 987 gain equal to its section 987 asset basis immediately before the liquidation, unless the aggregate tax basis of its assets is under $25 million.

Section 987 Foreign Currency Gain or Loss Explained