Transfer Pricing Rules for UK Companies: What Directors Must Know

What Are Transfer Pricing Rules?

Transfer pricing rules require that transactions between connected or related parties are conducted at arm's length — meaning on the same terms that two independent, unconnected parties would agree. The rules exist to prevent profit shifting, where a company might artificially reduce its UK taxable profits by, for example, paying an inflated fee to an overseas parent company.

In the UK, transfer pricing legislation is found in Part 4 of the Taxation (International and Other Provisions) Act 2010 (TIOPA 2010). HMRC has broad powers to adjust taxable profits where it believes non-arm's length pricing has been used.

Who Do the Rules Apply To?

Transfer pricing rules apply to medium and large companies involved in transactions with connected parties. A company is connected if one controls the other, or both are under common control — this includes parent and subsidiary relationships, joint ventures, and transactions with certain individuals who hold a significant interest.

Small and medium-sized enterprises (SMEs) are generally exempt from the full transfer pricing regime, but there are important exceptions:

• The exemption does not apply if the other party is based in a non-qualifying territory (broadly, a country without a tax treaty with the UK).
• SMEs can elect to opt into the rules voluntarily, which may be beneficial in some circumstances.
• From April 2023, HMRC introduced changes requiring certain SMEs to maintain records even where the exemption applies.

Large companies — broadly those with more than 250 employees or a turnover above €50 million — have no exemption and must comply fully.

Common Related Party Transactions to Review

Directors should review whether any of the following arrangements involve connected parties and whether arm's length pricing has been applied:

• Management fees or service charges paid to a parent or holding company
• Loans between group companies, including interest rates charged
• Intellectual property licences or royalty payments
• Goods bought or sold within a corporate group
• Rental of property between connected entities
• Salary or consultancy payments to directors or shareholders who are also connected parties

Documentation Requirements

HMRC expects companies within scope to maintain contemporaneous documentation — meaning records should be prepared at the time of the transaction, not retrospectively during an enquiry. Acceptable documentation typically includes:

• A description of the transaction and the parties involved
• The method used to determine the arm's length price (e.g. comparable uncontrolled price, cost plus, or transactional net margin method)
• Evidence of comparable transactions in the open market
• Financial analysis supporting the pricing decision
• Any group transfer pricing policy in place

For large multinational groups, the OECD's three-tier documentation framework applies: a Master File, Local File, and Country-by-Country Report (CbCR) if global turnover exceeds £750 million.

Penalties and HMRC Enquiries

Where HMRC successfully challenges a transfer pricing arrangement, it can make a compensating adjustment to increase the company's UK taxable profits. Penalties can apply where a company has been careless or deliberate in its non-compliance. Unprompted disclosure and robust documentation significantly reduce penalty exposure.

HMRC's Large Business directorate actively reviews intercompany arrangements, and transfer pricing is consistently one of the highest-risk areas identified in corporate tax enquiries.

Practical Steps for Directors

• Map out all transactions with connected or related parties annually.
• Confirm whether your company qualifies for the SME exemption — and whether any exceptions apply.
• Prepare or update transfer pricing documentation before filing your Corporation Tax return.
• Ensure intercompany loan interest rates reflect current commercial rates.
• Consider an Advance Pricing Agreement (APA) with HMRC if you have high-value or complex intercompany arrangements.

Transfer pricing is a complex area, but proactive documentation and arm's length pricing will protect your company from costly adjustments. If in doubt, seek advice from a qualified tax adviser with international experience.