What is the Foreign PE Exemption Reform?
On 21 May 2026, the UK Government announced plans to reform the taxation of foreign permanent establishments (foreign PEs). The key change: profits and losses of foreign PEs will no longer be optional but mandatory exempt from UK Corporation Tax for accounting periods beginning on or after 1 January 2027, with an earlier date of 1 September 2026 for companies in the oil & gas sector. (gov.uk)
Under the current regime, UK-resident companies can elect to exempt or include profits and losses of their foreign PEs; election is irrevocable and has trade-offs for losses and profit offsets. The planned change removes this election: exemption becomes compulsory. Losses incurred by foreign PEs from that date cannot be used to offset UK profits. Transitional provisions are in the draft legislation, with associated anti-avoidance rules. (gov.uk)
Who Will Be Affected?
- UK-resident companies with overseas operations carried out through branches/permanent establishments—not subsidiaries.
- Particularly oil & gas companies—they move earlier (from 1 September 2026).
- Multinational groups and financial organisations where foreign PE losses have been used to shelter UK profits.
Practical Steps to Prepare (Entity Setup & Tax Planning)
- Map your foreign PE structure: Identify branches or PEs in other jurisdictions, ensure accounting systems can isolate profits and losses linked to each PE separately.
- Review loss carry-forward and offset strategies: Losses arising in foreign PEs before mandatory exemption may not be usable after the commencement. Plan timing of loss usage accordingly.
- Anti-avoidance vigilance: Draft legislation includes rules to counter arrangements whose main purpose is tax advantage or to circumvent the new regime. Such arrangements may be subject to adjustments. (gov.uk)
- Update internal reporting and forecasting: Expect changes to your tax liabilities and cash flow—excluding PE losses reduces current relief; simulate effects to assess impact.
Example: Hypothetical Company Scenario
A UK-resident manufacturing firm has a foreign PE in Country X that experienced losses of £2 million during 2026. Under current rules with election, these losses could offset UK taxable profits in the same accounting period. Under the new mandatory exemption (effective from 1 Jan 2027), those losses cannot be applied against UK profits, raising the firm’s UK Corporation Tax liability. In oil and gas, this change starts from 1 September 2026.
Key Dates and Transitional Provisions
- Oil & Gas sector: policies effective from 1 September 2026.
- All other UK companies with foreign PE(s): apply from accounting periods starting 1 January 2027.
- The draft legislation was published 13 July 2026, with consultation responses due by September 13, 2026. (gov.uk)
How to Mitigate The Impact
- Accelerate use of foreign PE losses before the exemption kicks in.
- Consider reorganizing certain operations, whether via subsidiaries instead of PEs, if that gives more favourable tax treatment.
- Factor changes into pricing, investment return models, and capital allocation.
In short, the mandatory foreign PE exemption fundamentally shifts how cross-border branch profits and losses are treated in the UK. Proper planning, early action, and understanding the timing are critical to avoid unwelcome surprises.