Introduction: The Controlled Transactions Schedule and the American Owner
The controlled transactions schedule is the largest change to UK transfer pricing reporting in a generation. Moreover, it lands squarely on American families and founders who own UK companies. HMRC published its draft rules on 16 June 2026 and closed the consultation on 31 July 2026. Consequently, the controlled transactions schedule applies to accounting periods beginning on or after 1 January 2027. Around 75,000 businesses will sit inside the net.
Furthermore, the numbers behind it explain why HMRC cares so much. The Exchequer expects £105 million in 2027-28, rising to £350 million by 2030-31. Therefore, this is not a tidying-up exercise. It is a revenue measure built on data.
Most British commentary treats the new schedule as a corporate compliance chore. However, that view misses the point entirely for our clients. When you are an American who owns a UK company, every figure you hand HMRC has a mirror image on a US return. Moreover, the two sets of numbers must agree.
Why the Controlled Transactions Schedule Reaches Across the Atlantic
The controlled transactions schedule captures your dealings with related parties abroad. For a US-connected group, the counterparty is almost always the American company, the American parent or the American founder. Consequently, the schedule effectively names your US structure and prices it, in a standardised format that HMRC can compare against every other filer.
Additionally, HMRC will run this data through automated risk assessment. The tax authority already holds tens of billions of data points. Therefore, an outlier royalty rate or an off-market interest charge will surface within weeks, not years.
Who Should Read This Guide
We wrote this for American company owners, investors and executives with UK operating structures. Specifically, it addresses founders who hold a UK company alongside a US entity. It also covers US groups with UK subsidiaries, and American businesses whose UK activity has grown into a permanent establishment. Above all, it covers what happens on the US side once HMRC adjusts your figures.
What the Controlled Transactions Schedule Actually Requires
The controlled transactions schedule is a prescribed annual return of transaction-level data on cross-border related-party dealings. HMRC will collect it alongside the corporation tax return. Notably, it does not replace anything. Your local file, your master file and your country-by-country report all survive intact.
The draft sits within the wider UK transfer pricing framework in Part 4 of TIOPA 2010. Accordingly, if you are inside those rules today, you should assume you are inside the new schedule from 2027.
The Two Halves of the Controlled Transactions Schedule
The controlled transactions schedule splits into two halves. Section A deals with non-financial transactions. Specifically, you report the transfer pricing method applied and whether the UK entity was the tested party. Additionally, you disclose the profit level indicator, the margin achieved, the transaction category, the counterparty and the profit impact. Furthermore, where a threshold is breached you must identify your ten most significant counterparties.
Section B covers financial transactions. Consequently, you disclose your five largest loan relationship debits and your five largest creditor relationships. You also report your five most significant derivative contracts by profit impact. Remaining derivatives are reported in aggregate. Additionally, financial services businesses face simplified sub-sections for trading activity and regulatory capital.
Every figure goes in sterling. Therefore, a US group running its accounts in dollars must build a defensible translation method before the first filing, not afterwards.
The Thresholds That Decide Whether You File a Controlled Transactions Schedule
The draft notice sets different triggers depending on your group's size. For entities outside country-by-country reporting, the de minimis for aggregated non-financial transactions is £100,000. However, a different rule applies inside country-by-country reporting, meaning consolidated revenue above €750 million. Those groups report where goods, services, intellectual property or interest transactions exceed £1 million.
Financial transactions follow their own scale. Specifically, the threshold sits at £5 million for other businesses and at £50 million of loan relationship creditor balances for the largest groups. Meanwhile, transactions covered by an in-force advance pricing agreement fall outside the schedule altogether.
Importantly, £100,000 is a low bar. A modest management recharge between an American company and its British subsidiary clears it easily.
Controlled Transactions Schedule Deadlines, Penalties and the Soft Landing
For accounting periods ending on or before 30 September 2027, the draft deadline is 30 September 2028. Subsequently, for periods ending after that date, the schedule is due on the normal corporation tax filing date. In practice, most filers face a deadline twelve months after their year end, in line with the ordinary company tax return timetable.
The controlled transactions schedule penalty regime mirrors country-by-country reporting. Accordingly, late filing attracts an initial £300 penalty plus £60 for each further day of delay, and inaccuracies attract fixed penalties of up to £3,000. Moreover, HMRC has signalled a soft landing for the first period through a generous reading of reasonable excuse.
Nevertheless, treating £3,000 as the real exposure is a serious error. The genuine cost sits in what the data triggers, on both sides of the Atlantic.
Who Falls Inside the Net, and Who Escapes It
Scope for the controlled transactions schedule follows the existing UK transfer pricing rules rather than any new test. Therefore, three groups matter most to American owners: UK companies within those rules, UK companies with overseas permanent establishments, and non-UK companies trading through a UK permanent establishment.
The SME Exemption Survived, and That Matters Enormously
HMRC consulted in 2025 on stripping medium-sized enterprises of their transfer pricing exemption. However, the government confirmed at Autumn Budget 2025 that medium-sized enterprises keep it. Consequently, the exemption in sections 166 and 167 of TIOPA continues to shelter a large population of owner-managed US-UK structures.
An enterprise qualifies as small or medium where it has fewer than 250 staff. Additionally, turnover must not exceed €50 million, or the balance sheet total must not exceed €43 million. HMRC explains the mechanics in its international manual guidance on the SME exemption. Furthermore, the count aggregates linked and partner enterprises, so your American company's headcount and turnover come into the calculation.
That aggregation catches people out. Specifically, a British company with forty staff can lose the exemption because the American parent employs three hundred. Additionally, the exemption falls away where HMRC issues a transfer pricing notice to a medium-sized enterprise. HMRC sets out those exceptions in further manual guidance.
UK Permanent Establishments of American Companies
This is the trap almost nobody writes about. A US company with no UK subsidiary at all can still owe a controlled transactions schedule, purely because its UK activity amounts to a permanent establishment. Consequently, the schedule then reports the notional dealings between the UK branch and the American head office.
Meanwhile, the Finance Act 2026 rewrite of the permanent establishment definition took effect on 1 January 2026. Notably, it widened the dependent agent test. Therefore, American businesses that concluded they had no UK taxable presence in 2024 should test that conclusion again. HMRC's permanent establishment guidance sets out the current approach.
The timing is unforgiving. A US group could acquire a UK permanent establishment during 2026 and face its first schedule for the period beginning in January 2027.
Partnerships, LLPs and Corporate Members
Partnerships with a corporate member inside the UK corporation tax charge also file. Accordingly, US fund principals and American members of UK limited liability partnerships should check the structure above them. Furthermore, the partnership deadlines run to 30 September 2028 for earlier periods and to the partnership return date thereafter.
The American Side That British Commentary Ignores
Every leading UK article on this subject stops at the border. Notably, not one of the major published guides addresses what happens to the American owner. That gap is where the real money sits.
The Controlled Transactions Schedule Versus Form 5471 Schedule M
If you are a US person who controls a UK company, that company is a controlled foreign corporation. Consequently, you already report its related-party transactions on Schedule M of Form 5471. Schedule M captures sales, services, royalties, interest and loan balances between the CFC and related parties.
From 2027, the controlled transactions schedule delivers the same transactions to HMRC in a structured format. Therefore, two tax authorities hold two datasets describing one set of facts. Moreover, Article 27 of the US-UK treaty provides for exchange of information between them, and the treaty texts are published by the IRS.
In our experience preparing these returns for American owners in Britain, Schedule M and the UK statutory accounts diverge more often than clients expect. Specifically, the culprits are currency translation, year-end cut-off and recharges booked net rather than gross. Consequently, we now reconcile Schedule M to the UK ledger line by line before either filing goes out.
Section 482 and the Correlative Adjustment That Is Not Automatic
Here is the point that costs American owners the most. When HMRC increases your UK profit by disallowing a payment to your American company, that same income has already been taxed in the United States. Nevertheless, the IRS does not simply hand back the difference.
Under section 482 of the Internal Revenue Code, a correlative adjustment follows a primary allocation made by the IRS. The mechanics appear in Treasury Regulation 1.482-1(g)(2), and the IRS sets out its audit approach in Internal Revenue Manual 4.11.5. However, a foreign-initiated adjustment is different. Relief for an HMRC adjustment comes through the mutual agreement procedure in Article 26 of the treaty, requested under the procedures described in Revenue Procedure 2015-40.
Consequently, you must apply for competent authority assistance and wait. These cases routinely run for two to three years. Meanwhile, you have paid tax twice on the same profit.
Penalties, NCTI and Your Personal Return
The asymmetry between the UK and American penalties deserves attention. A UK inaccuracy penalty on the schedule tops out at £3,000. By contrast, section 6662(e) imposes a 20% penalty on the underpayment where a net section 482 adjustment exceeds $5 million or 10% of gross receipts, rising to 40% for gross misstatements.
Additionally, the adjustment ripples into your personal position. A UK adjustment raises the CFC's tested income for net CFC tested income purposes, which you report on Form 8992. Furthermore, it raises the UK tax attaching to that income, which changes your foreign tax credit position on Form 1118 or your personal Form 1116. Our tax treaty optimisation service exists precisely for this interaction.
A Worked Case Study With Real Numbers
Consider an American founder living in London. She holds 100% of a Delaware corporation and 100% of a UK operating company. Combined group headcount is 320 and combined turnover is £58 million. Therefore, the group fails the SME test and sits inside UK transfer pricing.
The Structure Behind the Controlled Transactions Schedule
For the year ending 31 December 2027, the UK company pays the American corporation a technology licence royalty of £4.6 million. Additionally, it takes a management services recharge of £1.8 million at cost plus 5%. Furthermore, it owes £14 million on an intercompany loan bearing interest at 7.4%, generating £1.036 million of interest. Finally, it sells development services back to the American corporation for £5.2 million at cost plus 10%.
Group revenue sits far below €750 million. Consequently, the lower thresholds apply. Every non-financial category clears £100,000 comfortably, and the £14 million loan clears the £5 million financial threshold. Therefore, all four streams appear on the controlled transactions schedule.
What the Schedule Reveals
The royalty represents 7.9% of UK revenue. Meanwhile, the loan carries 7.4% interest against an arm's-length rate closer to 5.6% for a company of this credit profile. Presented in the standardised controlled transactions schedule format, both figures sit visibly outside the pack.
HMRC opens an enquiry and adjusts. Specifically, it disallows £252,000 of interest and reduces the royalty deduction by £1.4 million. Consequently, UK taxable profit rises by £1.652 million, and UK corporation tax at the 25% main rate rises by £413,000. The published corporation tax rates confirm the charge.
The Cost of Getting It Wrong
The American corporation already reported that £1.652 million as royalty and interest income. At an exchange rate of 1.27, that is roughly $2.098 million, on which it paid federal tax of about $440,580. Therefore, the founder now faces £413,000 of fresh UK tax on income already taxed in America.
Relief exists, but it is neither quick nor free. She must file for competent authority relief under Article 26 and wait. Meanwhile, the money stays with two treasuries.
There is one silver lining worth capturing. The extra UK tax lifts the effective rate on that slice of income to 25%, comfortably above the 18.9% threshold for the high-tax election. Consequently, a properly made election can keep the adjusted profit out of her personal net CFC tested income entirely. However, the election operates annually and applies consistently across the CFC group, so the decision needs modelling rather than instinct.
What to Do During 2026, Before the First Filing
Preparation time before your first controlled transactions schedule is short and genuinely valuable. Notably, the first schedules land in 2028, but they describe 2027 transactions priced by decisions you are making now.
Fix the Controlled Transactions Schedule Data Before HMRC Reads It
Begin by testing whether your accounting systems can produce transaction-level data by counterparty, by category and by transfer pricing method. Furthermore, check that your UK ledger reconciles to the figures already sitting on Schedule M of your Form 5471. In our experience, that reconciliation alone surfaces most of the exposure.
Additionally, confirm that your UK local file supports the numbers your controlled transactions schedule will report. HMRC explains the transfer pricing records requirements in its manuals. Consequently, a schedule that contradicts your own documentation is worse than no documentation at all.
Reprice Now Rather Than Defend Later
Where a royalty rate or an interest rate looks aggressive, 2026 is the year to change it. Therefore, benchmark the loan against comparable third-party debt and benchmark the royalty against the OECD transfer pricing framework. Moreover, the professional bodies publish helpful technical commentary through the ICAEW tax faculty and the AICPA tax section.
For readers new to the underlying concept, Investopedia's explanation of transfer pricing gives a clear grounding before the technical detail.
Consider an Advance Pricing Agreement Instead
Transactions covered by an in-force advance pricing agreement fall outside the controlled transactions schedule. Consequently, an APA delivers two benefits at once: certainty on price, and removal from the reporting population. Similarly, transactions confirmed as low risk through the international compliance assurance programme may attract an exemption period.
Meanwhile, remember that country-by-country reporting continues separately for the largest groups, with US filers using Form 8975. The full draft rules remain available in HMRC's consultation document on the schedule.
How TaxYork Can Help
TaxYork prepares US and UK returns for wealthy cross-border families, founders and investors. Accordingly, we handle both sides of the same transaction rather than one half of it.
Our preparation work for the controlled transactions schedule starts with a reconciliation. Specifically, we tie your UK accounting data to your existing US filings. Furthermore, we test your group against the SME thresholds, including the aggregation of your American entities, so you know whether you file at all. We then prepare the underlying US positions, including Form 5471 and the net CFC tested income computations. That work runs alongside your US tax return preparation for expats.
Additionally, we address the compliance history that often sits behind these structures. Where earlier years contain missed filings, our IRS Streamlined Filing service brings them current. Similarly, unreported foreign accounts and holdings need attention. Our FBAR and FATCA reporting service resolves that gap before HMRC data prompts questions.
Conclusion
The controlled transactions schedule turns UK transfer pricing from a documentation exercise into a data exercise. Therefore, HMRC will no longer wait for an enquiry to see your intercompany pricing. It will read your controlled transactions schedule first and open the enquiry second.
For American owners, the stakes run higher than for a purely British group. Specifically, a UK adjustment creates double taxation that the IRS will not reverse automatically. Furthermore, the treaty route to relief takes years. Consequently, the value of accurate preparation now vastly exceeds the £3,000 headline penalty.
Above all, use 2026 to align your two sets of numbers. Ultimately, the group that files a schedule matching its own US returns will pass through automated risk assessment untouched. The group that files a contradiction will not.
Contact Us
Our specialists prepare US and UK tax filings for high-net-worth individuals, founders and investors. Cross-border structures are our core work. To review your position before the first filing period begins, book a consultation with our team. Alternatively, email hello@taxyork.com or telephone 020 3488 8606. Furthermore, you can explore our full cross-border tax preparation services at any time.
Disclaimer
This article provides general information on UK and US tax reporting requirements. It does not constitute tax advice for any particular person or business. Tax rules change frequently. Moreover, the rules described here derive from draft legislation and consultation documents that may alter before commencement. Furthermore, your circumstances determine how these rules apply to you. Accordingly, you should obtain professional guidance tailored to your position before acting. TaxYork accepts no liability for action taken solely on the basis of this article.