Transfer pricing from the US to the UK

When a US company sets up a UK entity, the prices they charge each other for services, goods, IP or funding come under review from both the IRS and HM Revenue & Customs. The US-UK corridor is broadly aligned to the OECD standard, but the two authorities enforce it very differently — and with UK reforms tightening and digital business models blurring where value is created, getting your pricing and documentation right early matters more than ever.

1. Two aligned rulebooks, two different mindsets

Both countries apply the arm's-length principle, but their cultures diverge. The US is codified, quantitative and litigation-tested (think the Medtronic and Coca-Cola cases), leaning on a detailed “best method” analysis and often the comparable profits method (CPM/TNMM). The UK is principle-based and substance-led: HMRC's Business Risk Review focuses on whether your pricing matches how the business actually runs. Many US-UK groups therefore keep hybrid documentation — analytical precision for the IRS, commercial narrative for HMRC — that tells one consistent story.

2. The arm's-length principle on both sides

Intercompany transactions must be priced as between independent parties. The US applies IRC Section 482 and the best-method rule; the UK applies TIOPA 2010, aligned with the OECD guidelines. The recognised methods are the same — CUP, resale price, cost plus, TNMM and profit split — and for intangibles both sides increasingly analyse the DEMPE functions (development, enhancement, maintenance, protection and exploitation) to check that profit follows real substance.

3. Common structures and the methods that fit

• UK marketing, sales and support subsidiary — the most common set-up. Usually TNMM against independent comparables; HMRC scrutinises the functional analysis and expense allocations.
• IP licensing from the US parent — CUP where comparable licences exist, otherwise a royalty benchmarked via TNMM. Royalty rates must trace back to demonstrable IP ownership, control and exploitation.
• Contract manufacturing in the UK — cost-plus, with audits focused on overhead allocation and the reasonableness of the markup.
• Shared or centralised services — cost-plus with a clear benefit test; charges for “passive association” (such as a group credit rating) are heavily scrutinised and often disallowed if not properly priced.
• Intra-group financing — CUP-based interest and guarantee fees supported by a credit analysis.

4. What the IRS expects

Section 482 governs, backed by the best-method rule. You are not required to file transfer pricing documentation in advance, but you should keep contemporaneous principal and background documents so you can rely on the Section 6662 penalty protection — without adequate documentation, penalties of 20% (substantial) or 40% (gross valuation misstatement) can apply. File Form 5472 for reportable transactions with foreign related parties, add Country-by-Country reporting (Form 8975) if the group is above the threshold, and provide documentation to the IRS within 30 days of a request.

5. What HMRC expects

UK transfer pricing turns first on whether the SME exemption applies. If it does not, multinational groups with consolidated revenue of EUR 750 million or more must keep an OECD-style Master File and Local File under the UK's Transfer Pricing Records Regulations and produce them within 30 days of an HMRC request; the Country-by-Country report is filed within 12 months of the year-end. Failure to keep records can bring penalties (broadly up to GBP 3,000 per failure), and for large groups any adjustment carries a presumption of carelessness that the taxpayer must actively rebut. Smaller groups still need enough evidence to show their pricing is arm's length.

6. The digital and IP challenge

For software, platform and data-driven businesses — common in this corridor — value increasingly sits in intangibles that move across borders with little friction. Both authorities focus on “hard-to-value intangibles”, cost-sharing arrangements, and whether platform IP (code, algorithms) and customer data are priced as separate or bundled intangibles. The practical test is DEMPE: where is the IP really developed, managed and controlled, rather than where it is legally owned. OECD Pillar Two's global minimum tax adds another layer, so effective-tax-rate impacts should be modelled alongside your transfer pricing, not after it.

7. HMRC's tightening regime and Diverted Profits Tax

The UK is moving from reactive audits to proactive, data-driven risk management. Reforms expected around 2026 are set to narrow the medium-sized exemption to genuinely small or micro businesses, introduce an International Controlled Transactions Schedule requiring granular disclosure of related-party dealings, and require large groups to hold contemporaneous Master and Local Files at the time of filing. Alongside this, the Diverted Profits Tax remains a powerful tool HMRC uses to challenge arrangements it sees as lacking genuine UK substance or as avoiding a UK permanent establishment. The direction of travel is more visibility and earlier scrutiny.

8. The treaty, MAP and APAs

A clear advantage of this corridor is the comprehensive US-UK tax treaty. If the IRS and HMRC take conflicting positions and both tax the same profit, you can invoke the Mutual Agreement Procedure, and bilateral Advance Pricing Agreements are increasingly used to secure certainty for complex digital and IP arrangements. Foreign tax credits may relieve residual double tax. These tools work, but they are slow, so consistent pricing and strong documentation remain your first line of defence.

9. A practical checklist

• Confirm whether the UK SME exemption applies now, and plan for the narrower rules ahead.
• One consistent set of intercompany agreements that match the real functions, assets and risks.
• A benchmarking study supporting each method and markup, refreshed regularly.
• US principal/background documentation and, where thresholds apply, Master/Local File and CbCR on both sides.
• A DEMPE analysis for IP, with platform code and data valued clearly.
• Model Pillar Two effective tax rates alongside your pricing, and consider a bilateral APA for high-value flows.

Get US-UK transfer pricing help from StartEase.

Official references

• IRS: Transfer pricing (Section 482)
• HMRC: International Manual (transfer pricing)
• OECD: Transfer pricing guidelines

Important: This is general educational information, not legal, tax, accounting or exchange-control advice. Rules, rates and thresholds change and depend on your circumstances — confirm the current position with a qualified professional before acting.