Foreign Permanent Establishment Exemption UK 2027

For most UK-resident companies, the foreign permanent establishment (PE) exemption is intended to become mandatory for accounting periods beginning on or after 1 January 2027. The reform changes the current elective structure: profits and losses attributable to a qualifying foreign PE will generally be exempt from UK Corporation Tax under the regime, while transitional rules restrict the use of historic foreign-PE losses and other attributes.

This is a company-level international-tax change, not a new personal tax rule. A foreign PE is also not the same as a separately incorporated foreign subsidiary. Use the existing Foreign Income Reporting guide only for individual income questions; a company must analyse its PE, accounting period, profit attribution, foreign tax and group position separately.

Current elective regime

Under the current rules, a UK-resident company with a foreign PE may elect for the foreign PE exemption to apply. The election is permanent and affects the company's foreign PEs within the regime. Once the exemption applies, future foreign-PE profits are generally left out of the UK Corporation Tax computation, and future foreign-PE losses cannot be used to offset UK profits.

Where no election has been made, the current regime can allow foreign PE losses to relieve UK profits or, in some circumstances, group profits. That difference is the policy reason for the reform: the government wants to prevent overseas losses being used against UK profits while keeping an exemption for future foreign-PE profits.

The current election history matters. A company cannot approach 2027 as if it were a clean first-year choice; it needs to establish whether an election exists, which PEs it covers, and whether prior losses or other attributes are in the transition population.

What changes from 1 January 2027

The reform makes the elective exemption regime mandatory for most companies. For accounting periods beginning on or after 1 January 2027, companies are intended to:

The policy paper also says the existing “total opening negative amount” treatment will be repealed and replaced by a transition loss restriction. The exact computation should be checked against enacted legislation and final HMRC guidance rather than copied from a policy summary into a tax return.

What counts as a foreign PE?

A foreign PE is a taxable presence of the UK-resident company in another territory, not merely a foreign customer or a foreign supplier. The legal and treaty definition can involve a fixed place of business, an agent or another form of business presence. The PE's profits and losses must then be attributed under the relevant rules.

Do not confuse these structures:

The reform does not turn every overseas activity into a PE, and it does not replace treaty analysis. First establish the presence; only then apply the exemption and transition rules.

The transition and historic losses

The most important preparation issue is the loss history. A company should reconcile foreign-PE profits and losses used in earlier UK computations, amounts carried forward, group relief claims, prior elections and any “opening negative amount” or equivalent attribute recorded in its tax files.

The draft policy is designed so that pre-transition losses and other attributes cannot simply be carried forward to reduce UK profits after the new regime begins. A company with a profitable UK business and a loss-making overseas PE may therefore see a different group tax result even if the overseas operation itself continues unchanged.

Prepare a schedule by PE and accounting period. Link each amount to the Corporation Tax return, computation, group-relief claim and foreign tax calculation. Where a PE has changed territory, business or accounting period, preserve the legal and accounting evidence explaining the transition.

Special oil and gas commencement

The policy materials identify an earlier commencement for UK-resident companies carrying on oil and gas exploration or exploitation activities through foreign PEs. For those companies, the measure is intended to apply from 1 September 2026, using a deemed accounting-period ending on 31 August 2026 for the relevant transition.

That is a sector-specific rule. A company should not apply the 1 September date to an ordinary foreign branch, and an oil-and-gas label alone does not resolve whether the special commencement rule applies. Check the policy paper and legislation for the activities and PE facts.

Profit attribution and foreign tax

The UK exemption does not remove the need to compute the foreign PE's result. The company still needs reliable accounts, an attribution method, currency conversion, foreign tax records and evidence for the PE's income and expenses. Treaty rules and foreign-law filings may apply even where the UK result is exempt.

The exemption also does not automatically answer whether interest, investment income, financing costs or gains are attributable to the PE. HMRC's International Manual contains exclusions and connected-business conditions for investment business. A foreign PE's accounts should be mapped to the statutory and treaty profit-attribution approach, not simply copied from management reporting.

What “mandatory” does and does not mean

Mandatory exemption does not mean that a company can stop identifying or measuring a PE. It means the exemption is intended to apply by default to the qualifying foreign-PE profits and losses within the amended Chapter 3A rules. The company still needs to establish whether a presence exists, which accounting period is affected, how much profit is attributable to that presence and which transition restriction applies. A foreign subsidiary remains a separate taxpayer; its accounts are not automatically the branch result of the UK parent.

The draft legislation also proposes an international meaning for “permanent establishment” for this Chapter. For a full treaty territory, the question is to be determined under the relevant double-taxation arrangements; for another territory, the draft refers to the OECD model. That makes the treaty and territory map an important control. Do not use a domestic company-law label such as “branch”, “representative office” or “sales office” as the conclusion without testing the activities, authority, premises and treaty wording. The policy papers are not a substitute for enacted law or a territory-specific treaty review.

A worked planning example

Assume a UK company has a 31 December year end, a French PE and a Spanish subsidiary. The French PE makes a loss before the reform, while the Spanish subsidiary is profitable. The French PE loss is not the same thing as a loss of the Spanish company, and the reform does not allow the parent to choose whichever treatment gives the lowest result. The company should identify any existing exemption election, the amount of the French loss used against UK or group profits, and the post-transition period in which a restriction may apply. The Spanish subsidiary requires its own residence, distribution, controlled-company and foreign-tax analysis.

If the same company changes its year end shortly before 1 January 2027, it should not assume that a short accounting period postpones the new regime. The policy material includes a targeted anti-avoidance rule aimed at arrangements that delay commencement by changing accounting-period length. Keep the board paper, accounting-period notice, commercial reason and tax computation together. A genuine commercial year-end change can still have a tax consequence; the existence of a business reason does not remove the need to model the rule.

Controls for the first affected return

Use a four-part control file. First, keep a legal presence memo for every territory, including treaty article, premises, dependent-agent facts and the activities actually performed. Second, maintain a profit-attribution bridge from local accounts to the UK tax computation, with currency and allocation assumptions documented. Third, maintain a loss-and-attribute ledger showing origin year, nature, amount, prior use, group-relief use and the proposed transition treatment. Fourth, retain the source status: policy paper, draft legislation, enacted provision or HMRC guidance. This prevents a draft proposal from being presented as a final filing rule.

The first affected Corporation Tax return may therefore require more reconciliation, not less, even though future PE profit is exempt. Check capital allowances, capital losses, financing items and anti-diversion or connected-business issues separately. If local tax continues to be due, the UK exemption does not cancel local registrations, estimated payments, payroll, VAT, transfer pricing or statutory accounts. Coordinate the UK computation with the local adviser so that a UK exemption adjustment is not mistaken for a foreign-country exemption.

A preparation checklist for 2027

1. List every overseas branch, agency and possible PE and identify the territory.
2. Confirm the accounting-period start date and whether the 1 January 2027 rule applies.
3. Locate any existing foreign-PE exemption election and its scope.
4. Reconcile historic PE losses, group relief, carried-forward attributes and opening balances.
5. Separate the PE from foreign subsidiaries, foreign customers and individual work locations.
6. Update the tax computation and forecast so foreign losses no longer reduce UK profits where the transition rules prevent it.
7. Recheck final legislation, HMRC guidance and treaty/foreign filing obligations before filing the first affected return.

Frequently Asked Questions

The practical first step is a PE-by-PE loss and election inventory. The 2027 change is most likely to affect companies that have relied on foreign losses, group relief or a delayed exemption decision, so those records should be reviewed before the first affected accounting period closes.

Official sources

• HMRC: Foreign Permanent Establishment Exemption — policy paper
• HMRC: Corporation Tax reform of the foreign permanent establishment exemption
• HMRC: Draft legislation — accessible version
• HMRC International Manual: Foreign permanent establishments of UK companies
• HMRC International Manual: Investment business exclusions