Transfer Pricing Rules for UK Companies
How UK transfer pricing rules work, the arm's length principle, approved pricing methods, documentation requirements, HMRC enquiries and the exemption for small and medium-sized enterprises.
Transfer pricing is the pricing of transactions between connected parties, such as sales of goods, provision of services, loans and licences between companies within the same group. UK tax law requires these transactions to be priced as if they were between independent parties dealing at arm’s length. If the actual price differs from the arm’s length price, HMRC can adjust the company’s taxable profits.
The UK transfer pricing rules are contained in Part 4 of the Taxation (International and Other Provisions) Act 2010 (TIOPA 2010) and broadly follow the OECD Transfer Pricing Guidelines.
The Arm’s Length Principle
The arm’s length principle is the international standard: connected parties must price their transactions as if they were independent entities in comparable circumstances. If a UK subsidiary buys components from its overseas parent at an inflated price, the UK subsidiary’s profits are artificially reduced. HMRC can adjust the price to the arm’s length level, increasing the UK taxable profit.
Arm’s length price = The price that would have been agreed between independent parties in comparable circumstances
| Scenario | Connected party price | Arm’s length price | HMRC adjustment |
|---|---|---|---|
| UK subsidiary buys goods from overseas parent | £120 per unit | £100 per unit | UK cost reduced by £20 per unit |
| UK parent charges overseas subsidiary for services | £50,000 per year | £80,000 per year | UK income increased by £30,000 |
| UK company borrows from overseas group company | 8% interest | 5% interest | UK interest deduction reduced to 5% |
Who Is Affected?
The UK transfer pricing rules apply to transactions between connected persons. Two companies are connected if:
- One controls the other (directly or indirectly)
- Both are under common control
- One is a 40% investor in the other (for the participation condition)
Control means the power to ensure that the affairs of the company are conducted in accordance with the wishes of the controlling party.
SME Exemption
Small and medium-sized enterprises are exempt from the UK transfer pricing rules unless:
- The transaction is with a party in a territory that does not have a double taxation agreement with the UK
- HMRC issues a transfer pricing notice requiring the company to apply the rules
An SME for these purposes broadly meets at least two of: fewer than 250 employees, turnover not exceeding €50 million, or balance sheet total not exceeding €43 million.
| Size | Transfer pricing rules apply? |
|---|---|
| Large company | Yes, always |
| Medium company (without notice) | No (unless non-treaty territory) |
| Small company (without notice) | No (unless non-treaty territory) |
Transfer Pricing Methods
HMRC accepts five methods, consistent with the OECD guidelines:
Traditional Transaction Methods
| Method | How it works | When to use |
|---|---|---|
| Comparable uncontrolled price (CUP) | Compares the price charged in the controlled transaction with the price in a comparable uncontrolled transaction | When reliable comparable transactions exist |
| Resale price method | Starts with the price at which a product is resold to an independent party and deducts an appropriate gross margin | When the reseller adds limited value |
| Cost plus method | Adds an appropriate mark-up to the costs incurred by the supplier | When semi-finished goods or services are supplied between connected parties |
Transactional Profit Methods
| Method | How it works | When to use |
|---|---|---|
| Transactional net margin method (TNMM) | Compares the net profit margin of the controlled transaction with the margin earned by comparable independent companies | When traditional methods cannot be reliably applied |
| Transactional profit split method | Divides the combined profit from a controlled transaction between the connected parties based on their relative contributions | When both parties make unique and valuable contributions |
The most appropriate method for the specific transaction should be used. In practice, the TNMM is the most widely applied method for UK companies.
Documentation Requirements
UK companies subject to transfer pricing rules must maintain sufficient documentation to demonstrate that their transactions are at arm’s length. While the UK does not have a mandatory transfer pricing documentation format, HMRC expects companies to be able to provide:
| Document | Content |
|---|---|
| Group overview | Organisational structure, business activities, principal markets |
| Functional analysis | Functions performed, assets used and risks assumed by each party |
| Transaction analysis | Description of each controlled transaction, including terms and conditions |
| Comparability analysis | Search for comparable transactions or companies |
| Method selection | Explanation of why the chosen method is the most appropriate |
| Financial analysis | Calculation showing the arm’s length range and where the actual price falls |
Country-by-Country Reporting
UK-headed multinational groups with consolidated revenue of €750 million or more must file a Country-by-Country Report (CbCR) with HMRC. The report shows the allocation of income, taxes paid and economic activity across all jurisdictions.
Advance Pricing Agreements
A company can apply to HMRC for an Advance Pricing Agreement (APA), which confirms the transfer pricing methodology for specific transactions over a fixed period (typically three to five years). APAs provide certainty and reduce the risk of future disputes.
| Type | Parties involved |
|---|---|
| Unilateral APA | Between the taxpayer and HMRC only |
| Bilateral APA | Between the taxpayer, HMRC and the overseas tax authority |
| Multilateral APA | Involving multiple tax authorities |
Bilateral and multilateral APAs are more effective because they bind both tax authorities, eliminating the risk of double taxation.
HMRC Enquiries and Adjustments
HMRC’s transfer pricing team actively reviews large and complex groups. An enquiry typically involves:
- Information requests for transfer pricing documentation
- Functional analysis review to assess each party’s contribution
- Benchmarking to test whether the prices and margins are within an arm’s length range
- Adjustment if HMRC concludes the actual pricing is outside the arm’s length range
If HMRC makes an adjustment to increase UK taxable profits, the company faces:
| Consequence | Detail |
|---|---|
| Additional corporation tax | Tax on the increased profit at the prevailing rate |
| Interest | Interest on the underpaid tax from the original due date |
| Penalties | Potentially up to 30% of the additional tax if HMRC considers the pricing was careless, or up to 100% if deliberate |
Mutual Agreement Procedure
If a transfer pricing adjustment results in double taxation (the same profit being taxed in two countries), the company can invoke the Mutual Agreement Procedure (MAP) under the relevant double taxation agreement. The two tax authorities negotiate to eliminate the double taxation.
Common Risk Areas
| Transaction | Risk |
|---|---|
| Management charges | Must reflect genuine services and be priced consistently with what would be charged to a third party |
| Intercompany loans | Interest rate must reflect the borrower’s creditworthiness and market rates for comparable loans |
| Intellectual property licences | Royalty rates must reflect the value of the IP and be consistent with arm’s length benchmarks |
| Cost sharing arrangements | Contributions must be proportionate to the expected benefits |
| Business restructurings | Transfer of functions, assets or risks to another group company must be compensated at arm’s length |
Thin Capitalisation
Thin capitalisation is a subset of transfer pricing that applies to intercompany debt. If a UK company is funded with an excessive level of debt from a connected overseas party (more debt than an independent lender would provide), HMRC can restrict the interest deduction. The company can only deduct interest on the amount of debt that it could have obtained on arm’s length terms.
Transfer pricing compliance requires ongoing attention to the structure and pricing of intercompany transactions. For large groups, robust documentation and regular benchmarking updates are essential to manage risk and avoid costly disputes with HMRC.