Introduction: The FDDEI Deduction and the American Company Owner in Britain
The FDDEI deduction now promises American company owners a 14% effective US tax rate on export income, and the headlines have been enthusiastic. Furthermore, that number is genuinely accurate. However, it applies to a far narrower group than most commentary suggests.
Specifically, the relief reaches only domestic C corporations. Meanwhile, most Americans running businesses from London trade through a UK limited company. Consequently, they cannot claim it at all in its headline form.
Nevertheless, a well-designed alternative exists. Therefore, this article explains both routes properly, with the British complications that American guidance consistently omits.
What the FDDEI Deduction Replaced
The FDDEI deduction succeeded the foreign-derived intangible income regime, known as FDII. Additionally, the One Big Beautiful Bill Act renamed the concept to foreign-derived deduction eligible income. Congress dropped the word "intangible" deliberately, because the calculation no longer approximates a return on intellectual property.
Importantly, the change applies to tax years beginning after 31 December 2025. Therefore, 2026 is the first year the new rules bite for calendar-year filers.
Why Britain Changes the Calculation
British corporation tax now sits at 25% for larger profits. Consequently, the arithmetic that makes the FDDEI deduction attractive to a purely domestic American exporter frequently collapses for an owner based in London.
Moreover, a US corporation managed from a British desk creates a UK permanent establishment. As a result, the promised 14% rate rarely survives contact with reality. We examine that risk in detail below.
How the FDDEI Deduction Works From 2026
The mechanics of the FDDEI deduction changed substantially, and mostly in the taxpayer's favour. Furthermore, the calculation became considerably simpler.
The 33.34% Rate and the 14% Effective Rate
Section 250 previously permitted a 37.5% deduction against qualifying income. However, the rate fell to 33.34% for tax years beginning after 2025. Therefore, against the 21% federal corporate rate, the effective rate rises from 13.125% to 14%.
Specifically, a corporation with $1,000,000 of qualifying income deducts $333,400. Consequently, it pays 21% on $666,600, producing $140,000 of tax. That equals 14% of the original figure exactly.
What Counts as Deduction Eligible Income
Deduction eligible income broadly means gross income excluding several categories. Specifically, the statute strips out subpart F inclusions, net CFC tested income, financial services income and foreign branch income. Additionally, domestic oil and gas extraction income falls outside.
The foreign-derived portion must then arise from property sold for foreign use, or from services provided to persons located outside the United States. The IRS technical guidance on the section 250 deduction sets out the sourcing analysis in full.
QBAI Is Gone, and Why That Matters
Under the old regime, you first calculated a deemed 10% return on qualified business asset investment. Furthermore, you deducted that notional return before reaching the benefit. Consequently, asset-heavy exporters received very little.
The new rules delete that step entirely. Therefore, service businesses and asset-light consultancies now qualify on their full margin. Additionally, interest expense and research expenditure no longer reduce the base. Accordingly, the FDDEI deduction reaches many companies that previously saw no benefit whatsoever.
Who Can Actually Claim the FDDEI Deduction
Eligibility for the FDDEI deduction matters more than any rate discussion. Specifically, it defeats most American owners abroad before they begin.
C Corporations Only: The Hard Boundary
Section 250 grants the deduction to domestic corporations taxed under subchapter C. Therefore, an individual cannot claim it, whatever their export profile. Additionally, the corporation must be a US corporation, not a foreign one.
Notably, very few companies use the relief. Fewer than four thousand corporate returns claimed the predecessor deduction in a recent filing year. Consequently, the FDDEI deduction remains a specialist provision rather than a mainstream one.
Why Your UK Limited Company Cannot Claim It
A company incorporated in England and Wales is a foreign corporation for US purposes. Therefore, it sits entirely outside section 250. Instead, it falls under the controlled foreign corporation rules, which we address next.
Furthermore, incorporating in Delaware purely to access the relief invites the permanent establishment problem. Consequently, the structure often costs more than it saves.
LLCs, S Corporations and Sole Traders
A single-member LLC is disregarded by default. Therefore, it cannot claim the FDDEI deduction unless it elects corporate treatment. Similarly, an S corporation falls outside subchapter C and receives nothing.
Moreover, an S corporation cannot have a non-resident alien shareholder. Consequently, an American who marries a British spouse and adds them to the share register may destroy the election entirely.
The Section 962 Election: The Route Most Owners Actually Need
Here lies the genuinely useful planning point, and no competing article on this topic addresses it. Furthermore, it applies to the majority of our clients.
NCTI Replaces GILTI From 2026
The Act renamed global intangible low-taxed income to net CFC tested income. Additionally, it removed the same 10% tangible asset return that vanished from the FDDEI deduction computation. Therefore, all tested income of your UK company now enters the US calculation.
Consequently, American owners of profitable British companies face larger inclusions than before. Meanwhile, the offsetting reliefs also improved.
The 40% Deduction and the 90% Deemed-Paid Credit
Individuals may elect under section 962 to be taxed on these inclusions as though they were a US corporation. Specifically, the election restores access to the section 250 deduction and to deemed-paid foreign tax credits.
The NCTI deduction fell from 50% to 40% for 2026. Therefore, the effective rate becomes 12.6% rather than 10.5%. However, the deemed-paid credit rose from 80% to 90%, which materially offsets the increase.
When a 962 Election Beats Restructuring
British corporation tax at 25% substantially exceeds the 12.6% effective NCTI rate. Consequently, the 90% deemed-paid credit frequently eliminates residual US tax altogether. Therefore, many owners need no restructuring at all.
Instead, they need a correctly made election and accurate Form 5471 reporting for the UK company. We reach that conclusion for most London-based owners we review.
The UK Permanent Establishment Risk Nobody Mentions
American articles urging you to route profits through a US corporation at 14% ignore British law entirely. Furthermore, this omission creates genuine exposure.
Running a US Corporation From a London Desk
If you manage a Delaware corporation from your Clerkenwell office, that office may constitute a fixed place of business. Consequently, HMRC can assert a UK permanent establishment. The corporation then owes UK corporation tax on attributable profits.
Therefore, the 14% headline rate becomes 25% British tax plus residual American tax. Additionally, you inherit two sets of filings and a transfer pricing obligation.
Treaty Article 5 and the Fixed Place of Business
Article 5 of the US-UK treaty defines a permanent establishment. Specifically, a fixed place of business through which business is wholly or partly carried on qualifies. Moreover, an office in your own home can satisfy the test.
The treaty documents also cover the dependent agent rule. Consequently, concluding contracts habitually in Britain creates exposure even without premises.
Transfer Pricing and the Arm's Length Contract
Where a US corporation and a UK company both sit in your structure, intercompany pricing must be defensible. Furthermore, the FDDEI documentation rules expect an arm's length contract supporting the foreign-derived character.
Therefore, weak documentation risks losing the FDDEI deduction and attracting a UK transfer pricing adjustment simultaneously. Accordingly, prepare the paperwork before the transactions, not afterwards.
Documentation, Foreign Use and Form 8993
The FDDEI deduction is evidence-driven. Consequently, substantiation determines whether it survives examination.
Proving Foreign Status of Your Customer
You must establish that your customer is a foreign person located outside the United States. Additionally, you must show the services related to foreign use. Contracts, invoices, addresses and delivery records all contribute.
Notably, a British client who receives services in America fails the test. Therefore, track where the benefit is consumed, not merely where the client is incorporated.
Related-Party Sales and Ultimate Foreign Use
Sales to related foreign parties carry additional conditions. Specifically, the property must ultimately reach an unrelated foreign person, or be used abroad in a genuine business. Consequently, routing sales through your own overseas subsidiary does not automatically qualify.
Claiming the Deduction on Form 8993
Corporations compute and claim the relief on Form 8993. Furthermore, the current Form 8993 instructions reflect the 2026 rate changes. Therefore, using a prior-year template will produce the wrong deduction percentage.
Individuals making a section 962 election attach the same computation. Accordingly, the form matters to owners as well as corporations.
The Second Layer of Tax the 14% Headlines Ignore
The 14% rate delivered by the FDDEI deduction sounds transformative. However, corporate tax is not the end of the story for an owner who needs the cash.
Getting Money Out of the C Corporation
Profits taxed at 14% remain inside the corporation. Therefore, extracting them as a dividend triggers a second charge on your personal return. Consequently, the combined burden climbs well above the headline figure.
Moreover, paying yourself a salary instead reduces corporate profit and shrinks the qualifying base. As a result, the FDDEI deduction and remuneration planning pull in opposite directions.
UK Tax on the Distribution
As a British resident, you then face UK tax on the dividend. Additionally, treaty relief and foreign tax credit positioning require careful sequencing across both systems. We model the full extraction cost before recommending any structure.
Notably, the foreign earned income exclusion covers salary but never dividends. Therefore, owners who rely on it for their remuneration lose that protection the moment they distribute profits.
Practical Steps Before Your 2026 Filings
You cannot change the statute. However, you can decide deliberately rather than by default. Three actions matter most.
Test the Permanent Establishment Position First
Before incorporating anything in America, establish where you actually work. Specifically, document who concludes contracts, where staff sit and which premises the business uses. Furthermore, HMRC's transfer pricing guidance sets the standard your intercompany terms must meet.
Consequently, an honest assessment often shows that the FDDEI deduction cannot survive in your circumstances. Better to learn that before paying formation and advisory fees.
Model Both Routes With Your Real Numbers
Compare the US corporation route against a section 962 election on your existing British company. Additionally, include extraction costs, filing fees and the value of your time. Many owners discover the difference is negative once the second layer of tax appears.
Therefore, run the arithmetic on your own figures rather than on an illustrative $1,000,000. The FDDEI deduction rewards a narrow profile, and most owners fall outside it.
Get the Compliance Right Either Way
Whichever structure you choose, the reporting burden is substantial. Specifically, corporations file Form 8993 alongside the corporate return. Meanwhile, owners of British companies must file Form 5471, and the IRS sets out who must file in detail.
Moreover, UK corporation tax obligations run in parallel on their own timetable. Accordingly, maintain one ledger and derive both filings from it.
Correct Historic Years Before Anyone Asks
If you never reported your British company, deal with it now. Specifically, the IRS Streamlined Filing Compliance Procedures remove penalties where the failure was non-wilful. Furthermore, filing those years establishes the elections and credits that reduce the underlying liability.
Importantly, a section 962 election generally requires a timely return. Therefore, delay narrows your options, and the FDDEI deduction analysis becomes academic if the base filings remain outstanding.
Case Study: A London Software Consultancy
Consider Rachel, an American who owns a software consultancy in Clerkenwell. Additionally, she serves European clients exclusively and generates $2,400,000 of revenue against $1,500,000 of costs.
Her adviser proposed a Delaware C corporation to capture the relief. On those figures, qualifying income reaches $900,000. Therefore, the FDDEI deduction delivers $300,060, leaving $599,940 taxable at 21%. Tax equals $125,987, precisely 14%.
Against a straight 21% charge of $189,000, the saving looks like $63,013. However, Rachel manages everything from her London office. Consequently, HMRC would treat the corporation as having a UK permanent establishment.
On a $700,000 attribution, British corporation tax at 25% reaches $175,000. Therefore, Rachel would pay substantially more overall, plus two compliance burdens and a transfer pricing file.
We modelled the alternative instead. Her existing UK limited company pays 25% British corporation tax. Furthermore, a section 962 election taxes her NCTI inclusion at 12.6% after the 40% deduction. Because British tax far exceeds that rate, the 90% deemed-paid credit eliminated her residual US liability entirely.
Consequently, Rachel kept her UK company, made the election and paid no additional American tax. Additionally, she avoided roughly $18,000 of restructuring and ongoing compliance costs. The FDDEI deduction was simply the wrong tool for her facts.
How TaxYork Can Help
TaxYork prepares US and UK returns for American company owners operating from Britain. Specifically, we model the FDDEI deduction, NCTI inclusions and section 962 elections together before anyone incorporates anything.
Furthermore, we handle the compliance that follows. We prepare Form 8993 computations, Form 5471 disclosures and the corresponding British filings from one consistent ledger. Consequently, the two systems reconcile rather than contradict each other.
We also correct historic positions. Notably, many owners never disclosed their British company at all. Therefore, the IRS Streamlined Filing Compliance Procedures frequently provide a penalty-free route back into compliance. Additionally, we complete the associated US tax return preparation for expats and any outstanding FBAR and FATCA reporting for the same years.
Conclusion
The FDDEI deduction represents a genuine improvement for American exporters. Furthermore, removing the tangible asset calculation opens it to service businesses that previously gained nothing. Nevertheless, it remains a C corporation relief.
Therefore, most American owners in Britain should examine a section 962 election before contemplating any restructuring. Specifically, British corporation tax at 25% combined with the enhanced 90% deemed-paid credit often eliminates US tax without new entities. Above all, never adopt a US corporation for a 14% rate without first testing the permanent establishment risk.
Ultimately, structure follows facts. Accordingly, model both routes with real numbers before you decide.
Contact Us
Speak to our cross-border team about your company structure and your 2026 filings. You can book a consultation directly, email hello@taxyork.com or call 020 3488 8606.
We act for American founders, consultants and company owners across London and the wider United Kingdom.
Disclaimer
This article provides general information only and does not constitute tax advice. Furthermore, tax legislation changes frequently and individual circumstances vary considerably. Therefore, you should obtain professional advice before acting on anything described here. TaxYork accepts no liability for decisions taken without formal engagement. Additionally, all figures reflect rules understood to apply for the 2026 US tax year and the 2026/27 UK tax year.