Entity Setup
How the Foreign Permanent Establishment Exemption Reform Will Impact UK Corporations
Changes to UK‐resident companies’ ability to offset foreign PE losses will reshape corporation tax planning—particularly for groups in oil & gas and international operations.
By NomadicTax Research Team • 5-8 min read • August 15, 2026
## Overview
From accounting periods beginning on or after **1 January 2027**, UK‐resident companies with foreign permanent establishments (PEs) will no longer be able to offset profits or losses attributable to those foreign PEs against their UK corporation tax liabilities. For oil & gas extraction or exploration activities, this change takes effect earlier—from **1 September 2026**. A policy paper and draft legislation published by HM Revenue & Customs sets out details. ([gov.uk](https://www.gov.uk/government/publications/foreign-permanent-establishment-exemption/foreign-permanent-establishment-exemption-policy-paper?utm_source=openai))
## Key Changes
- The exemption for foreign PE profits and losses becomes **mandatory**, removing the election options that previously existed. ([gov.uk](https://www.gov.uk/government/publications/foreign-permanent-establishment-exemption/foreign-permanent-establishment-exemption-policy-paper?utm_source=openai))
- Losses arising in foreign PEs prior to the commencement dates **cannot be carried forward or offset** against UK profits under the new regime. Transitional rules limit utilization of past losses. ([gov.uk](https://www.gov.uk/government/publications/foreign-permanent-establishment-exemption/foreign-permanent-establishment-exemption-policy-paper?utm_source=openai))
- The legal definition of “Permanent Establishment” is being aligned with international norms (e.g. under Article 5 of the OECD Model Tax Convention), replacing some UK‐specific definitions. ([gov.uk](https://www.gov.uk/government/publications/reform-of-the-foreign-permanent-establishment-exemption/draft-legislation-accessible-version?utm_source=openai))
## Strategic Implications and Planning Opportunities
### Affected groups
- Multinationals with UK‐resident parent companies and foreign branches or operations that have carried forward losses (especially those in oil & gas) will be most impacted. ([gov.uk](https://www.gov.uk/government/publications/foreign-permanent-establishment-exemption/foreign-permanent-establishment-exemption-policy-paper?utm_source=openai))
- Companies currently using losses or capital allowances from foreign PEs to reduce UK tax liabilities must reassess their projections.
### Planning responses
- **Accelerate loss recognition or relief claims** before the new regime becomes fully effective for your sector. For oil & gas activities, this means careful timing around **1 September 2026**; for others, before **1 January 2027**.
- Evaluate whether reorganizing operations—e.g. converting foreign PE operations into separate non‐UK entities—can minimize UK tax inefficiency, though watch out for anti-avoidance rules.
- Re‐budget tax liabilities and cash flow forecasts. Profits previously sheltered by losses from foreign PEs will now be taxed in full.
## Example
XYZ Energy, a UK‐resident group, has foreign PE exploration operations with carried‐forward losses of £30 million. Under the old regime, it used these losses to reduce its UK taxable profits. From 1 September 2026, those losses from foreign PEs in oil & gas cannot offset its UK profits. As a result, XYZ must restate its UK tax charge and increase its cash tax outflows significantly unless it restructures or accelerates claims before the cut-off.
## Practical Action Steps
- Review your accounting periods and determine whether your company meets the thresholds and sector designations.
- Liaise with your tax advisors to model effects under both the old and new regimes.
- Ensure all foreign PE losses are fully documented, and transactions entered into before 13 July 2026 are properly recorded, as they might benefit under transitional rules.
## Conclusion
The reform to the foreign PE exemption represents a significant shift in corporation tax exposure for companies with overseas permanent establishments. Advance planning, structuring and timing will be essential to avoid unexpected tax charges and maximize remaining reliefs.