Missed Reporting Investment Account: UK Spread Betting

A UK spread betting account generates no HMRC paperwork at all — no capital gains computation, no allowable loss, no annual tax certificate any preparer would think to request. That silence is precisely why a missed reporting investment account is so common among US citizens working in London: the profits remain fully US taxable, and the account itself remains FBAR and FATCA reportable, whatever HMRC does or does not charge.

This guide is written for the population where we see the problem most: the banker, fund manager, trader or private equity principal who is a US citizen or green card holder, resident in the UK, with a spread betting or contracts-for-difference account at an FCA-regulated spread betting or contracts-for-difference provider. Their UK return is clean. Their US return has never mentioned the account. Both facts are consistent with each other, and both are a problem.

Why a UK spread betting account leaves no paper trail

HMRC's long-standing position is that betting, including financial spread betting, is not a trade and the winnings are not chargeable to income tax or capital gains tax in the hands of an ordinary punter. The principle traces to Graham v Green and is set out in HMRC's Business Income Manual at BIM22017, which states plainly that having a system for placing bets, or being successful enough to live on the proceeds, does not by itself make the activity a trade. The dedicated spread betting page at BIM22020 adds the qualification that spread betting wins become taxable only where they arise from the carrying on of a trade, rather than merely from an opportunity presented by one.

The consequences for the paperwork are absolute. There is no annual CGT pack. There is no consolidated tax voucher. There is no entry on the self assessment return, no supplementary page, no white space disclosure. Stamp duty does not arise because no underlying security changes hands. Losses are equally invisible: a spread betting loss is not an allowable capital loss and cannot be set against gains on a share portfolio, which is the trade-off UK retail traders accept in exchange for the exemption.

For a cross-border preparer this is a structural blind spot. Onboarding a new private client normally means requesting the UK tax pack, the P60, the P11D, the broker consolidated statements and the pension annual statements. A spread betting account produces none of those documents. It is the one financial position in a sophisticated client's life that has no tax-document footprint whatsoever, which is why it so routinely fails to reach the 1040.

Does HMRC ever tax spread betting profits?

Occasionally, and the circumstances matter for the US analysis. The cases HMRC cites — Down v Compston and Burdge v Pyne — concern bets that were incidental to an existing trade rather than a free-standing gambling habit. A golf professional betting on his own matches, or a club proprietor gambling with customers on the premises, is in a different position from a portfolio manager placing index bets from a personal phone. In practice a UK-employed finance professional who spread bets on the side is very unlikely to be treated as trading, and HMRC has shown little appetite to reclassify retail spread betting even at high volume.

But note the asymmetry that creates. The activity that is most reliably tax-free in the UK is the activity most likely to be overlooked on a US return, because there is nothing to prompt the question. UK-favourable does not mean US-neutral.

How CFDs differ from spread bets in the UK

A contracts-for-difference account at the same broker behaves entirely differently for HMRC. CFD gains are chargeable to capital gains tax, losses are allowable and can be carried forward, and the disposals must be reported through self assessment where the reporting thresholds are met. That normally generates a broker report and therefore a document trail. It matters because many clients hold both products with the same firm, under one login, and genuinely do not know which positions sat in which wrapper. Establishing that split is the first task in any remediation exercise, and it changes the UK answer as much as the US one.

How the US treats the same account

The United States taxes citizens and green card holders on worldwide income regardless of residence, and it does not recognise the UK's characterisation of spread betting as a wager outside the tax net. Every closed position produces a US tax consequence. The only genuine question is which of two characterisations applies, and the gap between them is now wider than at any point in the last decade.

Route one: gambling income under section 165(d)

The straightforward reading is that a spread bet is a wager, so wins are gambling income. The IRS position at Topic no. 419 is that gambling winnings are fully taxable and must be reported whether or not a Form W-2G is issued, that losses are deductible only by taxpayers who itemise on Schedule A, and that the loss deduction can never exceed the winnings reported. Gross winnings go into income; losses come out only as an itemised deduction, and only against those winnings.

That was already unattractive. From tax years beginning after 31 December 2025 it became materially worse. The One Big Beautiful Bill Act, enacted in July 2025, amended section 165(d) so that only 90% of wagering losses are deductible, still capped at winnings. A taxpayer who wins and loses the same amount in a year now recognises taxable income equal to 10% of the winnings despite having made nothing. For a London trader running a book with high gross turnover and a thin net result, the phantom income can be very large in absolute terms.

Two further points compound it. Gambling losses are an itemised deduction, so a client taking the standard deduction gets no relief at all. And the foreign earned income exclusion has no application whatsoever — this is not compensation for services.

Route two: notional principal contract with ordinary treatment

The alternative characterisation, and in our view the better one for most institutional-grade accounts, follows the analysis US tax practitioners apply to CFDs. A CFD is economically a swap: two parties exchange the difference between opening and closing price on a notional amount, with no delivery of the underlying. On that footing it is a notional principal contract, taxed on the realisation method with ordinary gain or loss treatment. It is expressly outside section 1256 — the Dodd-Frank swap exclusion means the 60/40 blend does not apply — and it is not eligible for a section 475 mark-to-market election, which reaches securities and commodities rather than notional principal contracts.

A UK spread bet is economically indistinguishable from a CFD on the same instrument. The stake per point is a notional amount, the settlement is a cash difference, and the only real distinction is the UK regulatory and duty wrapper. US federal tax characterisation follows economic substance rather than the label a foreign regulator applies, which is the core of the argument that the position is a swap and not a wager.

The practical stakes are considerable. Ordinary swap treatment allows genuine netting of gains against losses within the year, produces an ordinary loss deductible above the line rather than a capped itemised deduction, and escapes the 90% haircut entirely. On the same trading record, characterisation can change the US tax bill by a multiple.

There is no bright-line IRS ruling on UK spread betting specifically. That is exactly why the position taken should be documented contemporaneously by the preparer, with the contract terms and the broker's own product description on file, rather than assumed. This is a technical judgement call and not one to leave to a software default.

Route three: the currency layer everyone forgets

Spread betting accounts are almost always denominated in sterling, and many US-referenced positions are quoted in dollars while settling in pounds. Section 988 governs foreign currency gain or loss, and the movement in the account's sterling balance between funding and withdrawal is a separate item from the trading result itself. On a six-figure account held across the 2022–2025 sterling range, the currency component alone can be a meaningful number, and it is invariably missing from any reconstruction that works only from the broker's profit-and-loss summary.

US and UK treatment compared

Feature	UK — spread bet	UK — CFD	US — spread bet or CFD
Profits taxable	No for a non-trading punter (BIM22017 / BIM22020)	Yes — capital gains tax	Yes — always, on worldwide income
Character of gain	Not chargeable	Capital gain	Ordinary income (gambling, or swap under NPC analysis)
Losses	Not allowable, no carry-forward	Allowable capital loss, carry forward indefinitely	Gambling: itemised only, capped at winnings, 90% limit from 2026. Swap: ordinary, nets
Preferential rate	n/a	CGT rates apply	None — section 1256 60/40 is excluded for swaps
Stamp duty / SDRT	None	None	n/a
Annual reporting document	None issued	Broker report, self assessment	Preparer must reconstruct from statements
Account itself reportable	No filing	No separate account filing	FBAR and, above thresholds, Form 8938
Net investment income tax	n/a	n/a	3.8% NIIT generally applies

The cross-border trap nobody prices in: there is no foreign tax credit

This is the point that turns an administrative oversight into a real cash liability, and it is the reason generalist US expat content handles this topic so badly.

Most US citizens in London operate on the comfortable assumption that UK tax rates exceed US rates, so foreign tax credits absorb the US charge and the 1040 is a compliance exercise rather than a payment exercise. That assumption holds for employment income, UK dividends, UK rental profits and UK capital gains. It fails completely here. HMRC charges nothing on spread betting, so there is no UK tax to credit. The US tax on the position is therefore payable in full, in cash, at ordinary graduated rates, on income the client sincerely believed was tax-free.

The net investment income tax makes it worse still. The 3.8% NIIT generally applies to this class of income, and foreign tax credits cannot be applied against NIIT in any event, so even a client with surplus credits elsewhere in the return cannot shelter it. On a large multi-year trading record, the aggregate exposure is frequently the largest single item in a remediation file — larger than the pension, larger than the ISA, larger than the offshore fund PFIC positions that usually attract all the attention.

Where the account turns out to have held CFDs rather than spread bets, the picture improves marginally because UK CGT will have been paid and some credit may be available subject to sourcing and treaty analysis. But CFD gains are ordinary income in the US and capital gains in the UK, and the mismatch in both character and timing means credits rarely line up cleanly. Our US-UK tax accountants model this position by position rather than in aggregate, because the aggregate answer is almost always wrong.

Is a spread betting account FBAR and Form 8938 reportable?

Yes, on the prudent view, and the analysis is independent of whether the account made money. The IRS confirms on its FBAR guidance page that a US person must file where the aggregate value of foreign financial accounts exceeded $10,000 at any point in the calendar year, that the accounts caught include bank, brokerage and similar accounts, and expressly that whether the account produced taxable income has no bearing on the requirement.

A margined spread betting account maintained by an FCA-authorised firm holds client money, carries a cash balance, accepts deposits and processes withdrawals. It functions as a financial account in every practical respect. There is no exclusion for accounts whose product happens to be characterised as betting under domestic UK law. Where the balance is material, or where it pushes the client's aggregate over $10,000 in combination with a current account and a savings account, it belongs on the FinCEN Form 114.

Form 8938 follows separately, on the higher specified foreign financial asset thresholds available to taxpayers living abroad. Those thresholds are generous enough that many clients clear them on the spread betting account alone once it is combined with UK pensions, general investment accounts and cash. Both filings need checking for each of the open years, not just the current one. Clients who want to see the scale of what accumulated non-filing can produce can run the numbers through our FBAR penalty calculator before deciding on a route.

The account was never invisible to the IRS

This is the assumption worth destroying early. UK spread betting firms are UK financial institutions under the UK-US intergovernmental agreement implementing FATCA. Where they identify a US person among their account holders, they report the name, address, US taxpayer identification number, account number, year-end balance and gross amounts credited to HMRC, which passes the data to the IRS. The account leaves no trace in the UK tax system and a very clear trace in the US information-reporting system. That is exactly the wrong way round for a taxpayer who has never disclosed it.

The W-8BEN problem

Handle this one carefully. Under section 871(m), brokers offering CFDs and spread bets that reference US equities must document the status of the holders, which is why clients are pushed to complete a W-8BEN or W-9 at onboarding. Separately, a number of UK spread betting firms restrict or decline US-person accounts for regulatory reasons.

The result is a recurring and serious fact pattern: a US citizen with a UK passport and a UK address certifies non-US status on a W-8BEN in order to open or keep the account. That is no longer an oversight. It is a signed certification of a fact the client knew to be untrue, and it materially affects whether a non-willful route remains available. If this feature is present in the file, it must be identified before any submission is made and discussed under privilege, not disclosed reflexively into a streamlined package.

Reconstructing the record before you file anything

Because there is no tax pack, the file has to be rebuilt from primary broker data. Request the following from the broker in writing, for every open year:

• The full closed-position history, with open and close dates, instrument, stake or notional, and realised result per position — not just the annual summary figure.
• A separate breakdown of which positions were spread bets and which were CFDs, since most brokers offer both under a single client relationship.
• The complete funding and withdrawal ledger, with dates and amounts, for section 988 currency analysis.
• Month-end and, ideally, daily peak balances in sterling for six years, which is what the FBAR maximum-value field requires.
• Financing and overnight funding charges, dividend adjustments and commission, which affect the ordinary income computation under swap treatment.
• A copy of the W-8BEN or W-9 held on file, and the account opening documentation.

Convert everything at appropriate rates and reconcile the reconstructed result to the broker's own annual statement before it goes anywhere near a return. A reconstruction that does not tie out will not survive examination.

Fixing a missed reporting investment account: the routes available

The correct route depends on the facts, particularly on how many years are affected, whether tax is actually due and whether conduct was non-willful. The options are not interchangeable and choosing wrongly is expensive.

• Streamlined Foreign Offshore Procedures. The standard route for a UK-resident US citizen whose omission was genuinely inadvertent. It requires amended or delinquent returns for the most recent three years, FBARs for the most recent six, a non-willful certification and payment of tax and interest, with the offshore penalty waived for qualifying non-residents. Eligibility conditions and disqualifiers, including any open examination, are set out in the IRS streamlined filing compliance procedures. Our IRS streamlined filing team handles these end to end.
• Delinquent FBAR submission procedures. Available where the trading income was in fact reported and paid, and only the Forms 114 were missed. Rare in this fact pattern, because the income is normally missing too.
• Amended returns alone. Appropriate where only one or two years are affected and the account is small, though it lacks the penalty protection the streamlined framework provides.
• IRS Criminal Investigation Voluntary Disclosure Practice. The route where willfulness is a live question — typically the false W-8BEN cases, or where a client continued to omit the account after being asked about foreign accounts directly. This is a legal decision, not a preparation decision.
• Quiet disclosure — do not. Filing amended returns with no framework and hoping the matter closes forfeits streamlined eligibility and, if noticed, materially aggravates the position.

What this looks like in practice

Take a dual US-UK national portfolio manager in Mayfair with a spread betting account averaging around £150,000 in equity across five years. Gross winning positions total £480,000; gross losing positions total £415,000. The economic profit is £65,000 over five years — unremarkable, and entirely tax-free in the UK.

Under swap characterisation, the US result is broadly the £65,000 net, taxed as ordinary income across five returns, plus a currency item, plus NIIT. Under gambling characterisation applied to years from 2026 onward, the client reports £480,000 of income and deducts at most 90% of £415,000, producing an additional £41,500 of income with no economic counterpart, and only if the client itemises. Add the FBAR exposure across six years and the difference between an early, well-argued position and a default one runs well into six figures. The characterisation work is not academic.

The UK side of the remediation

Do not assume the UK position is automatically clean simply because spread betting is exempt. Three checks are mandatory.

• Confirm the product. If any positions were in fact CFDs, chargeable gains have arisen and, if unreported, will need correcting to HMRC — typically through the Digital Disclosure Service, with interest and behaviour-dependent penalties. The number of clients who are certain their account was spread betting and are wrong is high.
• Test the trade question honestly. If the client's own occupation involves the same markets and the betting was ancillary to it, BIM22020 becomes live rather than theoretical, and specialist review is warranted before any disclosure position is fixed.
• Check residence and the post-April 2025 regime. For a US executive who arrived recently, the abolition of the remittance basis and the introduction of the four-year foreign income and gains regime changes what is in scope on the UK side and, indirectly, what credits are available on the US side. Coordinate the two returns rather than filing them independently.

Five things we tell clients in the first meeting

• Stop trading in the account until the position is understood. Every new closed position adds a year to the problem and can affect the choice of remediation route.
• Do not ask the broker for a "tax statement". Ask for raw transaction data. A summary figure is not a defensible basis for an amended return.
• Do not tell the IRS the account was tax-free. It was tax-free in the UK. That distinction is the entire case, and phrasing it loosely in a non-willful certification is a gift to an examiner.
• Deal with the pension, ISA and offshore fund holdings in the same exercise. Nobody has exactly one unreported account, and a second disclosure after a first has closed is a far weaker position.
• Get the characterisation argued and documented before the first figure is entered. Retro-fitting the analysis to a filed return is not possible.

Jungle Tax works exclusively with senior finance professionals, founders and internationally mobile private clients navigating both systems at once. A spread betting or CFD account is one of the few holdings where the UK's generosity actively conceals a US liability, and where the right technical position, taken early and evidenced properly, materially changes the outcome. You can read more of our work on cross-border investment reporting in our guides library, or review how we support high-net-worth cross-border clients.

If you hold, or have held, a UK spread betting or CFD account that has never appeared on a US return, the position is fixable — but the routes narrow as time passes and narrow faster once the IRS makes contact. Contact our cross-border team for a confidential, privileged consultation. We will establish what was actually held, quantify both characterisations, and set out the remediation route that protects you, before anything is filed.