Introduction: Spread Betting Across Two Tax Systems
Spread betting occupies a strange position in the life of an American living in Britain. Your platform tells you the profits are tax-free. Your accountant in London agrees. Nevertheless, the Internal Revenue Service takes an entirely different view, and nobody at your broker will mention it.
The asymmetry is brutal. Britain charges nothing, so you pay no UK tax. Consequently, you have no foreign tax to credit against the American bill that follows. TaxYork sees traders in the City who won handsomely for years, paid HMRC precisely nothing, and then discovered a six-figure US liability with no relief whatsoever.
Why Spread Betting Creates a One-Sided Tax Bill
Most cross-border problems involve double taxation, which treaties are designed to fix. Spread betting presents the opposite structure. Only one country taxes the gain, so the usual relief machinery never engages. Therefore, the American pays the full domestic rate on income that a British colleague keeps entirely.
Who This Guide Is Written For
We write for high-net-worth Americans and dual nationals in the United Kingdom who trade actively. Specifically, this addresses investment bankers, fund professionals, company owners and private investors who hold a UK spread betting account. Additionally, it speaks to accidental Americans who never suspected that a British wagering contract could reach a US return.
How Britain Treats Spread Betting
British tax law treats spread betting as a wager, not an investment. That single characterisation drives the entire domestic outcome. Furthermore, it explains why the platforms advertise the product so confidently.
No Chargeable Gain, No Allowable Loss
Section 51 of the Taxation of Chargeable Gains Act 1992 removes betting winnings from capital gains tax altogether. The legislation itself states that winnings from betting are not chargeable gains. Moreover, HMRC confirms in manual CG56105 that no asset is acquired or disposed of when you place a financial spread bet.
The symmetry cuts both ways. Because no chargeable gain arises, no allowable loss arises either. Consequently, a losing year in Britain gives you nothing at all to carry forward.
Why HMRC Says You Are Not Trading
Income tax follows the same logic. HMRC sets out in manual BIM22020 that a person placing a spread bet is not normally carrying on a trade. The wider principle appears in BIM22015, which places gambling profits outside the scope of income tax.
Importantly, that treatment is not absolute. Manual BIM56900 explains that a spread bet used for a commercial purpose, such as hedging a genuine trading position, falls outside the exemption. Therefore, a company owner hedging business exposure should take advice before assuming the bet is free of UK tax.
Spread Betting Versus Contracts for Difference
The distinction matters enormously in Britain. A contract for difference is a chargeable asset, so gains attract capital gains tax and losses become allowable. Spread betting sits outside that regime entirely, which is why the two products exist side by side on the same platform.
For a British investor, the choice is straightforward arithmetic. For an American, however, the calculation inverts completely. A contract for difference generates a UK tax charge, and that charge creates a foreign tax credit. Consequently, the "tax-free" product can prove the more expensive one.
How the IRS Treats the Same Profits
The United States taxes its citizens on worldwide income regardless of where they live. Section 61 of the Internal Revenue Code sweeps in all income from whatever source derived. Accordingly, a profit that Britain ignores still lands squarely on your Form 1040.
Gambling Income Is Fully Taxable
The IRS states the position plainly in Topic 419: gambling winnings are fully taxable and must be reported. The rule catches spread betting in London exactly as it catches a Las Vegas jackpot. Notably, no minimum threshold exists, and no informational form arrives from a UK platform to prompt you.
Winnings from spread betting therefore reach Schedule 1 of Form 1040 as other income. They face ordinary rates rather than the preferential rates on long-term capital gains. Consequently, a top-bracket American faces 37 per cent on profits a British neighbour keeps in full.
The Characterisation Question Nobody Answers
American law contains no provision addressing UK financial spread bets by name. In practice, three characterisations compete. The contract may be a wagering transaction, an ordinary derivative producing ordinary income, or a position in property generating capital gain.
Section 1256 mark-to-market treatment rarely applies, because a spread bet is not traded on a qualified board or exchange. Furthermore, the Dodd-Frank amendments pushed most swap-like agreements outside section 1256 altogether. Above all, remember that every available answer produces US tax; none produces zero.
No Foreign Tax Credit Exists to Rescue You
Here lies the defining feature of spread betting for an American abroad. A foreign tax credit requires foreign tax, and Britain has charged none. Therefore, the credit that neutralises most cross-border income simply has nothing to work with.
The foreign earned income exclusion offers no help either, because wagering profits are not earned income from services. Similarly, the US-UK treaty exempts UK-resident gambling winnings from US tax under the other income article, yet the saving clause in Article 1(4) withdraws that protection from citizens. The official technical explanation of the convention confirms how narrowly the citizen carve-outs operate.
The One Silver Lining in the Limitation Formula
A subtle benefit does exist for clients carrying unused credits. Gambling gains arise where the wagering activity happens, so a bet placed in London is foreign-source income. Consequently, that income enlarges the numerator of your section 904 foreign tax credit limitation.
Untaxed foreign income therefore creates additional room in the general basket. Clients sitting on excess credit carryforwards from a high-tax year can sometimes absorb part of them against spread betting profits. Nevertheless, the benefit is a partial offset rather than a solution, and it disappears entirely if you hold no carryforwards.
The 2026 Rule That Creates Phantom Income
A change effective this year transforms the arithmetic for anyone trading at volume. Most British commentary has not registered it at all. Furthermore, the platforms have no reason to mention it.
Section 165(d) and the New 90 Per Cent Cap
Historically, section 165(d) allowed wagering losses as a deduction, but only to the extent of wagering gains. Section 70114(a) of the One Big Beautiful Bill Act tightened that rule considerably. From tax years beginning after 31 December 2025, only 90 per cent of wagering losses qualify.
Treasury published proposed regulations implementing the change on 17 April 2026. The Federal Register notice amends section 1.165-10 to reflect the new ceiling. Consequently, the rule now applies to the 2026 returns you will file next spring.
Breaking Even Now Costs You Money
Work the arithmetic through and the effect becomes stark. Suppose you win £400,000 and lose £400,000 across a year of active spread betting. Britain taxes nothing, because you made no money.
America now taxes you on £40,000. You report £400,000 of gains, deduct only £360,000 of losses, and pay tax on a profit that never existed. At 37 per cent, that phantom income costs roughly £14,800 in a year when your account balance did not move.
Losses Require You to Itemise
The trap deepens for the many Americans abroad who claim the standard deduction. Wagering losses appear as an itemised deduction on Schedule A. Therefore, a taxpayer who does not itemise deducts nothing at all and pays tax on gross winnings.
High earners in London frequently itemise anyway, given mortgage interest and charitable giving. Nevertheless, you must run both computations before assuming relief exists. In our experience, this single check changes the outcome for roughly a third of the trading clients we review.
Reporting, Records and the Accounts Behind the Trades
Compliance failures around spread betting rarely involve the trading profit alone. The account itself carries obligations that clients routinely overlook. Moreover, the platform will never remind you.
Converting a Sterling Account for a Dollar Return
Your spread betting platform reports in sterling and your return demands dollars. You must convert each position, not merely the annual total. Accordingly, a year of active trading requires disciplined record-keeping that most retail statements do not provide.
Gains and losses need separate treatment, because section 165(d) nets nothing automatically. Consequently, aggregating your account into one figure understates gross winnings and misstates the deduction. Our guide to which exchange rate to use for US and UK tax sets out the accepted conventions.
Does a Spread Betting Account Trigger FBAR?
Usually, yes. A UK spread betting account holds client money with a financial institution outside the United States, which brings it within the definition of a foreign financial account. Therefore, it counts towards the $10,000 aggregate threshold for the FBAR filing requirement.
Form 8938 may apply separately once your specified foreign financial assets exceed the higher thresholds available to taxpayers living abroad. The IRS summary of FATCA reporting sets out those figures. We map the whole account chain through our FBAR and FATCA reporting service.
The Certification Your Platform Asks You to Sign
Many UK platforms present American clients with a Form W-8BEN at onboarding. Signing it certifies foreign status under penalties of perjury, which no US citizen may truthfully do. We set out the consequences in detail in our guide to the W-8BEN form UK banks send Americans.
Some providers block US persons entirely, while others screen only for residence. Consequently, an American resident in Britain often opens an account without any citizenship question arising. The Financial Conduct Authority regulates these firms, yet its remit covers conduct rather than your American filing duties.
The Deeper Exposures Most Spread Betting Traders Miss
Three further issues decide the size of the American spread betting bill. Each one turns on facts that a platform statement will never show. Moreover, each can move the liability by tens of thousands of pounds.
Session Accounting and the Size of Your Gross Winnings
Gross winnings drive everything, because the 90 per cent cap applies to losses rather than to the net figure. Therefore, the way you group your trades matters enormously. A trader who treats every closed position as a separate wagering transaction reports an enormous gross number and suffers the full phantom income effect.
American practice recognises a session approach instead. The Tax Court accepted per-session netting in Shollenberger, following the position the IRS itself took in Chief Counsel memorandum AM 2008-011. Furthermore, the safe harbour in Notice 2015-21 applies the same logic to electronic play, treating a session as running from buy-in to cash-out.
Applying that framework to spread betting is genuinely arguable and not free from doubt. However, a defensible daily session methodology, documented contemporaneously, frequently reduces reported gross winnings by a wide margin. Consequently, it can cut the phantom income the 90 per cent rule would otherwise create.
Professional Status, Schedule C and Self-Employment Tax
Some clients pursue spread betting with such regularity that professional gambler status becomes arguable. That status permits ordinary business expenses under section 162, reported on Schedule C rather than Schedule A. Accordingly, the standard deduction problem disappears.
The advantages are narrower than they appear. Section 165(d) now caps combined losses and expenses at 90 per cent of losses, and only to the extent of gains. Additionally, professional status can expose net profits to self-employment tax, although a certificate of coverage under the US-UK totalisation agreement usually removes that charge for a UK-resident trader.
State Tax and the Net Investment Income Question
Americans who never severed a state connection face a further layer. Several states tax gambling winnings while disallowing any deduction for losses. Consequently, a former resident of a high-tax state can owe state tax on gross winnings with no offset at all, as we explain in our guide to California tax residency after leaving for London.
The 3.8 per cent net investment income tax raises a separate question. Recreational wagering gains generally fall outside net investment income. However, a trader who genuinely carries on a business of dealing in financial instruments may find the charge applies, and that charge attracts no foreign tax credit whatsoever.
Where Spread Betting Meets Missed Returns
For many clients, the trading profit is the moment a wider compliance gap surfaces. If you never declared the winnings, you may not have declared the account either. Therefore, treat the discovery as a whole-position review rather than a single amendment.
Coming Forward Through Streamlined Filing
Where the failure was non-wilful, the IRS Streamlined Filing Compliance Procedures offer a clean route. You file three years of amended or delinquent returns and six years of foreign bank account reports. Importantly, the miscellaneous offshore penalty falls away for taxpayers who meet the non-residency test.
Our IRS Streamlined Filing service prepares the certification and the substantive returns together. Furthermore, we reconstruct trading records where platform statements have expired.
Why Delay Is More Expensive Here Than Elsewhere
Ordinary cross-border income usually carries a foreign tax credit that softens a late filing. Spread betting carries none, so the exposure is the full US charge plus interest. Consequently, the cost of waiting compounds faster than clients expect.
Professional standards guide how we approach these disclosures, and the ICAEW tax faculty publishes the framework within which we work. Above all, act before HMRC data reaches the IRS through the automatic exchange of account information.
Case Study: A City Trader and Four Years of Tax-Free Wins
The following case reflects a composite of engagements from our London practice, with figures adjusted to protect client confidentiality. It shows how quickly the asymmetry compounds.
The Position on Discovery
An American derivatives trader in the City opened a UK spread betting account in 2021 after a colleague described the profits as tax-free. He signed the platform certification without reading it. Over four years, he recorded gross winnings of £186,000 and gross losses of £121,000, leaving him £65,000 ahead.
He declared his spread betting to HMRC, correctly showing nothing taxable. However, he also declared nothing to the IRS and filed no foreign bank account reports. The account peaked at £84,000, well above the reporting threshold.
The Remediation
We prepared three years under the Streamlined Foreign Offshore Procedure plus a timely current-year return. Each year reported gross winnings as other income and claimed the wagering losses on Schedule A, where itemising produced a better result than the standard deduction. Additionally, we filed six years of delinquent foreign bank account reports.
His US liability across the four years came to approximately $27,400, driven by ordinary rates and the complete absence of any credit. No penalty arose under Streamlined. Nevertheless, the bill would have been roughly $9,000 lower had he traded contracts for difference and generated creditable UK tax.
The Outcome
We restructured the position prospectively. He closed the spread betting account and moved to a taxable UK dealing account, accepting UK capital gains tax in exchange for a foreign tax credit. Consequently, his combined effective rate fell by roughly eleven percentage points on the same trading strategy.
How TaxYork Can Help
TaxYork prepares United States and United Kingdom personal tax returns for high-net-worth Americans in Britain. Specifically, we reconstruct trading records, compute gross winnings and losses correctly, and apply the new 90 per cent limitation accurately. Furthermore, we model whether a taxable product would leave you better off overall.
Our work covers missed US tax returns, missed FBAR filings and offshore disclosure through the Streamlined procedures. Additionally, we handle cross-border tax planning and US and UK tax returns preparation for traders, founders and fund professionals whose affairs span both countries.
Conclusion
Spread betting is genuinely tax-free in Britain and genuinely taxable in America. That combination removes the foreign tax credit, removes the exclusion, and leaves the full US charge standing. Meanwhile, the 90 per cent limitation now taxes traders who merely broke even.
Run the comparison before your next position. Furthermore, check whether the account belongs on your FBAR. Ultimately, the product marketed as tax-free is frequently the costliest instrument an American in Britain can hold.
Contact Us
If you hold a UK spread betting account, or you have traded one without reporting it, we can review the position quickly and confidentially. Please contact us to speak with a specialist, or book a consultation at a convenient time.
Email hello@taxyork.com or telephone 020 3488 8606. We act for clients across London, the South East and the wider United Kingdom, together with Americans returning to the United States.
Disclaimer
This article provides general information about United States and United Kingdom tax rules and does not constitute tax advice for any particular person. Tax legislation, rates and procedures change, and the treatment of any transaction depends on your individual circumstances. Accordingly, you should obtain professional advice before acting on anything contained here. TaxYork accepts no liability for any loss arising from reliance on this article without such advice.