Financial spread betting is a UK trading product that allows an individual to speculate on the price of shares, indices, currencies, commodities and other financial markets without owning the underlying asset. Instead of buying a fixed number of shares or contracts, the trader chooses an amount of money to risk for every point the market moves.
The structure is particularly associated with the UK because of its unusual combination of financial regulation and tax treatment. Financial spread betting is regulated by the Financial Conduct Authority when offered as a regulated financial product, yet ordinary speculative winnings made by UK individuals generally fall outside both Capital Gains Tax and Income Tax. Corresponding losses normally receive no tax relief. HMRC states in its current financial spread betting guidance that no assets are acquired or disposed of and therefore no chargeable gains or allowable losses normally arise.
That tax position is a genuine benefit for profitable UK traders, but it should not be allowed to obscure the economics of the product. Spread betting is leveraged. A relatively small amount of margin can support a much larger market position, which makes both profits and losses move faster than the cash committed at entry might suggest.
The FCA consequently applies essentially the same retail protection framework to leveraged spread betting that it applies to CFDs and rolling spot forex. The product can be tax efficient, but it is not a tax advantaged version of conventional investing. It is a leveraged form of financial speculation.
What Is Financial Spread Betting?
A financial spread bet is a contract based on the movement of an underlying financial market. The trader does not purchase the market itself. Instead, the provider quotes a buying and selling price and the customer chooses whether they expect the market to rise or fall.
HMRC gives the example of a spread betting company quoting prices around the FTSE 100. A customer can buy if they expect the index to rise or sell if they expect it to fall, with profit or loss determined by the number of points the market moves and the trader’s chosen monetary stake. HMRC describes this structure in its Capital Gains Manual.
Suppose the FTSE 100 is quoted at 9,000 to sell and 9,002 to buy. A trader expecting the index to rise might buy at 9,002 with a stake of £5 per point. If the position is later closed at 9,052, the relevant movement is 50 points and the gross trading profit is approximately £250 before financing or other applicable costs.
If the market instead falls by 50 points, the same £5 stake produces approximately a £250 loss. The monetary effect therefore grows directly with both the market movement and the stake per point.
This is different from fixed odds betting. A spread bet does not normally produce one fixed winning amount. Being right by 100 points produces a larger result than being right by ten points, assuming the same stake. Losses behave in the same manner.
How £ Per Point Trading Works
The £ per point convention is one of the main practical differences between spread betting and CFDs. A spread bettor normally thinks about exposure in terms such as £1, £5 or £20 for every point or pip of movement.
Suppose a trader buys the FTSE 100 at £10 per point. A rise of 25 points produces £250 of gross profit, while a fall of 25 points produces a £250 loss. A 100 point movement has a £1,000 effect either way. The market itself has not changed because the trader increased the stake; only the financial exposure has.
This makes position sizing relatively intuitive. If a planned stop is 40 points from entry and the trader wants to risk approximately £200, a stake of £5 per point produces roughly that amount of market risk before slippage or gaps. Increasing the position to £20 per point would turn the same 40 point adverse move into roughly £800.
Currency spread bets use similar arithmetic. A GBP/USD position might be expressed in pounds per pip rather than purchasing a conventional lot of 100,000 currency units. The underlying economic exposure can be very similar to a forex CFD, but the account interface and UK tax treatment differ.
Share spread bets can likewise imitate the economic result of owning or short selling shares. A trader can take a position equivalent to a chosen amount for each penny or point of movement without becoming the legal shareholder.
The ease of calculating £ per point exposure is useful, but it can also make large positions feel deceptively simple. Increasing a stake from £2 to £20 requires only changing one number on the order ticket, while multiplying the financial effect of every subsequent market movement by ten.
Going Long and Short
Spread betting allows traders to speculate in either direction without first owning the underlying asset.
A long position is opened when the trader expects the market to rise. The trader normally buys at the provider’s offer price and later closes using the selling price. Profit occurs when the market rises far enough to overcome the initial spread and any other relevant costs.
A short spread bet works in reverse. The trader sells at the provider’s quoted selling price because they expect the market to decline. If price falls, the position can later be closed at a lower buying price for a profit. If price rises, the trader loses money.
This ability to short easily is one reason spread betting is popular with active traders. Short selling physical shares can involve stock borrowing arrangements and other restrictions, while a spread bet simply creates contractual exposure to the downward movement.
The convenience does not change the risk. Short positions can move against the trader rapidly, and some markets can gap substantially after unexpected news. FCA retail protections constrain account liability, but they do not prevent a large portion of the available trading balance being lost.
Spread Betting Is a Derivative, Not Ownership
A spread bettor never becomes the owner of the underlying share, index or currency simply because the trading result tracks that market.
A spread bet on shares in HSBC does not provide shareholder voting rights. The trader’s name does not appear on the shareholder register, and dividend related amounts are contractual adjustments rather than dividends received through ordinary share ownership.
The same principle applies to indices. Nobody can directly own one unit of the FTSE 100 index itself through a spread bet. The contract simply references the index level to calculate profit and loss.
This matters when comparing spread betting with investing. A long term investor buying shares can participate in the business through ownership and may receive ordinary dividends. A spread bettor has a contract with the provider. The economic exposure can resemble share ownership over short periods, but the legal relationship is different.
Counterparty selection therefore matters. The trader needs to know which regulated company provides the account, because that company is responsible for the contract and the treatment of client money.
FCA Regulation of Financial Spread Betting
Financial spread betting may contain the word “betting,” but regulated financial spread bets sit firmly inside the FCA’s financial services framework.
The FCA states that its CFD sector includes contracts for difference, spread betting and rolling spot foreign exchange. Its current CFD provider guidance applies retail protections across these leveraged products.
The regulator requires firms offering leveraged spread bets to retail customers to restrict leverage, apply margin close out rules, provide negative balance protection and publish standardised risk warnings. The FCA also prohibits providers from using certain financial or non-financial inducements to encourage retail customers to trade.
Retail leverage is capped between 30:1 and 2:1 depending on the underlying asset. Major foreign exchange pairs generally sit at the higher end, while more volatile assets receive tighter limits. The same broad regime applies to ordinary retail CFDs. The FCA’s permanent product intervention rules set out these protections.
The regulatory similarity is important because spread betting’s favourable tax treatment sometimes creates the mistaken impression that it is treated casually as gambling. It is not. A regulated spread betting provider has financial services obligations, and the FCA requires risk warnings showing the proportion of the firm’s retail CFD and spread betting accounts that lose money.
Leverage and Margin
Spread betting is normally leveraged, meaning the trader deposits only part of the full economic value of the position.
Suppose a position creates £30,000 of market exposure and requires £1,000 of initial margin. The trader has not reduced the financial effect of the £30,000 position by depositing only £1,000. If the underlying market moves 1% against the position, the approximate movement is £300 before costs, equivalent to 30% of the initial £1,000 margin.
This relationship makes leverage useful and dangerous at the same time. A trader can obtain meaningful exposure without tying up the entire notional amount. The same feature means a relatively small market movement can create a large percentage change in the funds allocated to the trade.
Maximum leverage should therefore not be confused with sensible leverage. A broker allowing 30:1 on a particular market does not mean a trader should use the full amount available.
Position size works better when calculated from the acceptable loss and planned stop distance. If the trader is comfortable risking £100 and the logical stop sits 50 points away, a £2 per point stake creates approximately £100 of intended market risk. The maximum margin available is largely irrelevant to that calculation.
Margin Close Out and Negative Balance Protection
The FCA’s retail rules contain additional protection once losses begin reducing account equity.
Providers must close positions when funds fall to 50% of the margin required to maintain the relevant open positions. This is intended to stop retail accounts becoming increasingly underfunded while leveraged trades continue moving against them.
The FCA also requires negative balance protection. Under the current FCA Handbook, the liability of a retail client for restricted speculative investments is limited to the funds dedicated to that account. In ordinary terms, an eligible retail customer should not owe the provider additional money beyond the protected trading balance because a leveraged position moved violently against them.
Negative balance protection does not make the account safe. If £10,000 has been allocated to spread betting, the protection does not stop most or all of that £10,000 being lost. It addresses what happens after losses reach the limits of the protected account.
This distinction became especially important after historical currency and index events where prices moved through stop levels before trades could be filled. A stop order manages ordinary market risk, but it cannot guarantee a particular exit when there is no liquidity available at that price.
What Markets Can Be Spread Bet?
UK providers commonly offer spread bets based on equity indices, shares, forex, commodities, government bonds and other financial markets. Availability varies between firms, and some markets can be offered only during certain trading hours.
Indices are particularly common because the £ per point structure maps naturally onto index prices. A trader can speculate on movements in the FTSE 100, S&P 500, Nasdaq and other major benchmarks without buying the underlying shares.
Forex spread betting follows the same principle. A trader can take a position on GBP/USD or EUR/USD using a monetary stake for each pip or point of movement rather than trading conventional currency lots.
Individual equities allow traders to speculate on company share prices without purchasing the shares themselves. Corporate actions and dividend adjustments need to be understood because the spread bet is a derivative contract rather than ownership.
Commodity spread bets can reference markets such as gold, oil and natural gas. Different markets have different volatility and financing characteristics, so a position size that is reasonable for one asset should not automatically be copied to another.
The common feature is that the provider calculates cash profit or loss from the movement in the referenced market and the trader’s stake.
The Spread and Other Trading Costs
The name spread betting comes partly from the provider quoting a buying and selling price separated by a spread.
If the underlying market is approximately 10,000 and the provider quotes 9,999 to sell and 10,001 to buy, a trader opening a long position does so at 10,001. The market must move sufficiently higher before the position becomes profitable because an immediate exit would occur around the lower selling price.
Spreads vary according to market liquidity, volatility and broker pricing. Major indices and currency pairs usually have tighter dealing spreads than less liquid shares or exotic currencies. Pricing can widen significantly around major economic announcements or periods of market stress.
Some providers embed most of the direct dealing cost in the spread, while other charges can still apply. Overnight financing is particularly important for leveraged positions held beyond the provider’s daily cutoff.
A day trader closing every position before financing is charged may care primarily about spreads and execution. A swing trader keeping a leveraged position for several weeks may discover that financing matters much more than an extra fraction of a point at entry.
The cheapest advertised spread therefore does not automatically identify the cheapest account for every strategy.
Overnight Financing
Leveraged spread bets can generate daily financing charges because the trader is receiving exposure larger than the cash posted as margin.
The exact calculation varies between providers and markets. Long positions can incur a financing debit based on a benchmark interest rate plus the broker’s adjustment, while short positions can have different treatment. Shares, indices, forex and futures-style spread bets can also use different pricing conventions.
The result is that spread betting is generally better suited to speculation than very long term ownership. Holding a leveraged share spread bet for several years can accumulate financing charges that would not exist in the same way if the investor simply bought the shares outright with cash.
This is one of the main drawbacks hidden by the attractive tax treatment. Avoiding Capital Gains Tax does not help if financing and trading friction consume more of the return than the tax saving.
The relevant comparison is therefore the final economic result after spread, financing and tax rather than simply whether the account is described as tax free.
Benefits of Financial Spread Betting
The most obvious benefit for UK individuals is taxation. Ordinary speculative spread betting winnings are generally outside Capital Gains Tax, and HMRC also states that betting and gambling do not normally constitute trading for Income Tax purposes. This means a typical individual spread bettor does not pay CGT or Income Tax simply because they made profitable bets.
The £ per point convention is another practical benefit. Traders can calculate risk without translating lots or contract quantities into pounds. A 40 point stop at £3 per point creates approximately £120 of planned market risk before execution effects.
Spread betting also provides straightforward short exposure. Selling a market does not require the trader to own the underlying security first. This can be useful for directional trading or for certain hedging strategies, although commercial hedging can complicate the tax position.
There is no ordinary Stamp Duty or Stamp Duty Reserve Tax from purchasing underlying shares because no shares are actually acquired. This should not be treated as an advantage over every derivative, however, because ordinary CFDs similarly do not involve buying the underlying stock.
Access to many markets from one account provides another practical benefit. A trader can potentially use one provider for indices, currencies, equities and commodities while applying broadly similar position sizing mechanics across each market.
For profitable active traders who remain within the ordinary UK individual tax treatment, these advantages can be substantial.
The Main Drawback: Leverage Magnifies Losses
The main financial drawback is the same feature that makes spread betting capital efficient.
Leverage allows a relatively small account to control large exposure. If position size is poorly managed, normal market volatility can therefore produce very large percentage losses.
A trader with £5,000 who risks £1,500 on one position is not protected by the fact that the broker required only £600 of margin. The financial risk comes from exposure and stop distance rather than from the amount of margin used to open the trade.
This becomes especially dangerous when traders average into losing positions. Increasing the £ per point stake as the market moves against the original idea can cause total exposure to grow precisely when the evidence supporting the trade is becoming weaker.
The FCA continues to require prominent loss warnings because leveraged retail trading produces poor outcomes for a large proportion of customers. Its current rules require firms to disclose the percentage of their own retail client accounts that lost money.
Tax free profits are attractive. A tax free loss remains a loss.
Spread Betting Losses Receive No Normal Tax Relief
The tax benefit contains an important disadvantage that is often left out of advertising.
HMRC states that because no chargeable gains normally arise from ordinary spread betting, no allowable capital losses arise either.
Suppose a trader loses £20,000 through ordinary financial spread betting and separately makes £30,000 of taxable gains by selling investments. The £20,000 spread betting loss cannot normally be deducted from those investment gains for Capital Gains Tax purposes.
A comparable qualifying CFD loss can potentially become an allowable capital loss and therefore have future tax value. Spread betting losses generally do not.
This creates a symmetrical tax rule. HMRC normally leaves the private speculative spread bettor’s winnings alone, but it also leaves their losses alone.
For a consistently profitable trader, that bargain is highly attractive. For somebody who suffers substantial losses while realising taxable gains elsewhere, the inability to claim those losses can become a meaningful disadvantage.
The tax position therefore favours successful spread betting rather more than unsuccessful spread betting, which is perhaps not the most surprising feature of tax law.
Is Financial Spread Betting Tax Free in the UK?
For most UK individuals making ordinary speculative financial spread bets, describing profits as “tax free” is reasonable shorthand. The qualification matters.
HMRC’s Business Income Manual, updated in August 2026, says that a taxpayer placing a spread bet is not normally carrying on a trade. The profits are therefore not taxable as trading income and the losses do not receive relief. HMRC also notes that simply having a system or making a living from betting does not automatically turn betting into a taxable trade.
Separately, HMRC’s Capital Gains Manual, updated in September 2026, says that no assets are acquired or disposed of through financial spread betting and therefore no chargeable gains or allowable losses normally arise.
For a typical UK resident individual speculating with their own money, that generally means spread betting profits fall outside both ordinary Income Tax on trading profits and Capital Gains Tax.
It is the combination of these two principles that produces the familiar UK tax advantage.
A £10,000 Spread Betting Profit
Consider an individual who makes £10,000 during the tax year entirely through ordinary speculative financial spread betting.
Assuming the normal treatment applies, the £10,000 does not create a chargeable capital gain. The trader therefore does not need to use the Capital Gains Tax Annual Exempt Amount against that profit.
The same result generally applies from an Income Tax perspective because the private bettor is not normally carrying on a taxable trade merely by placing spread bets.
The simplified result is therefore £10,000 of economic profit with no CGT or Income Tax on the spread betting winnings themselves.
This should not be confused with saying the account has no costs. Spreads, financing and other broker charges have already affected the economic trading result before the tax question is considered.
It also does not mean every possible activity conducted through something labelled a spread bet receives identical treatment. HMRC looks at the substance and purpose of the transactions where unusual commercial circumstances exist.
A £50,000 or £100,000 Spread Betting Profit
The same ordinary tax principle does not disappear merely because the profit becomes larger.
An individual making £50,000 of genuine speculative spread betting winnings can still fall within the ordinary tax treatment. Likewise, earning £100,000 does not automatically convert wagering into a taxable trade simply because the amount is large.
HMRC’s guidance on professional gambling is particularly relevant here. The fact that someone uses a system, spends considerable time betting or is successful enough to live on the proceeds does not automatically make their betting activity a trade.
That makes spread betting unusual compared with most financial activity. A private individual can generate substantial speculative winnings without the profits automatically becoming taxable simply because the person is skilled or active.
The facts still matter, particularly where the betting activity is connected with another commercial operation. Anyone generating very large profits or using complex business structures should obtain professional advice rather than rely on a general article.
For an ordinary individual account, however, the tax advantage does not contain a low annual ceiling comparable with an ISA allowance.
Financial Spread Betting and Capital Gains Tax
Capital Gains Tax is where the contrast with CFDs becomes particularly obvious.
For the 2026/27 tax year, the individual CGT Annual Exempt Amount is £3,000. The general CGT rates for individuals are 18% and 24%, depending on the interaction between taxable gains and the available basic rate band. HMRC’s current CGT allowances confirm the £3,000 exemption for 2026/27.
Ordinary spread betting gains do not generally need this exemption because they sit outside the capital gains calculation in the first place.
Suppose a higher rate taxpayer earns £50,000 through qualifying CFD trading and has no other capital gains or losses. Under simplified assumptions, £47,000 would remain after the £3,000 exemption. If the whole taxable amount falls at 24%, the CGT would be £11,280.
A £50,000 ordinary spread betting profit can instead remain outside CGT altogether.
This illustrates why spread betting has retained such a strong position in the UK active trading market. Once profits become substantial, the difference is not a minor accounting detail.
Spread Betting Losses vs CFD Losses
The same comparison becomes much less attractive when the year produces a loss.
A £50,000 ordinary spread betting loss normally creates no allowable capital loss. It cannot simply be carried forward and used to shelter £50,000 of taxable gains in a later year.
A qualifying £50,000 CFD capital loss can potentially be used against chargeable capital gains according to HMRC’s normal loss rules.
This difference means that the tax advantage should not be described as “spread betting receives better tax treatment in every situation.” It receives different treatment.
The spread bettor keeps qualifying winnings outside the tax system and receives no ordinary tax benefit when things go badly. The CFD trader potentially pays tax on gains but can obtain recognition for qualifying losses.
For a profitable trader, the spread betting side of that bargain can be extremely valuable. For someone with large investment gains elsewhere and substantial trading losses, CFD loss relief may be financially useful.
The products can generate almost identical market exposure while producing very different tax records.
Does a Professional Spread Bettor Pay Tax?
Calling yourself a professional trader does not automatically make spread betting winnings taxable.
HMRC’s guidance makes clear that betting does not become a trade simply because the participant has a system or is successful enough to earn a living from it.
The more important question is whether the spread betting activity forms part of another trade or serves a commercial purpose. HMRC’s spread betting guidance says that taxable treatment depends on the terms of the contract and the economic substance where winnings arise from carrying on a trade rather than from betting alone.
HMRC gives commercial hedging as an example elsewhere in its manuals. If a business uses financial spread bets as part of managing commercial currency or market exposure, the simple private punter treatment may not apply.
This distinction is more important than whether somebody trades from home full time, describes themselves as professional or earns more from spread betting than from employment.
Tax follows the facts, not the Twitter biography.
Companies Are Different
The familiar “spread betting is tax free” statement is primarily about individuals making genuine wagers. It should not be applied automatically to limited companies.
HMRC states that for companies, contracts for differences include financial spread bets for Corporation Tax purposes and the derivative contracts regime applies in most cases. HMRC’s financial traders guidance draws this distinction explicitly.
A company therefore cannot assume that calling a derivative position a spread bet removes it from tax. Corporate tax rules examine the contract within a different statutory framework.
This matters when traders consider placing activity inside a limited company for accounting, capital or business reasons. The tax result is not simply the personal spread betting rule transferred into a corporate account.
Tax residence can change the answer as well. The UK treatment described here concerns UK taxation. A person resident elsewhere may be subject to their local country’s rules even when using a British spread betting provider.
For anything involving a company, commercial hedge or cross-border residence, personal tax advice is more reliable than the general slogan that spread betting winnings are tax free.
What Is General Betting Duty?
There is another tax associated with spread betting, but it is primarily a tax on the provider rather than an individual charge on customer winnings.
For the 2026/27 tax year, financial spread betting is subject to General Betting Duty at 3% of the provider’s relevant net stake receipts. HMRC’s current gambling duty rates confirm that the financial spread betting rate remains 3%.
HMRC’s General Betting Duty notice explains that spread betting duty is calculated from the bookmaker’s relevant profits rather than being a percentage simply deducted from every customer’s winning position.
This is important because articles occasionally state that spread betting is subject to a 3% tax without explaining who pays it. A retail trader does not normally receive a statement showing HMRC withholding 3% of each successful spread bet.
The provider’s tax costs can naturally affect the economics of the business and therefore pricing indirectly. Legally, however, General Betting Duty and personal Capital Gains Tax are different issues.
Financial Spread Betting vs CFDs
Spread betting and CFDs can look almost identical on a modern trading platform. Both allow long and short exposure, use margin, can incur overnight financing and fall under the FCA’s retail leverage restrictions.
The main operational difference is usually how position size is expressed. Spread bets use an amount such as £5 per point. CFDs use shares, lots, units or contracts.
The main UK personal tax difference is much larger. Ordinary speculative spread betting gains generally sit outside CGT while losses do not create allowable capital losses. CFD gains for ordinary private traders commonly fall within the capital gains regime, with qualifying losses potentially recognised.
Neither product creates ownership of the underlying asset. A trader using a share CFD does not become a shareholder any more than a spread bettor does.
This means the choice can sometimes be viewed as two legal wrappers around similar leveraged market exposure. Pricing and market availability can still differ, so the tax advantage should not automatically decide the account.
A worse spread, larger financing charge or poorer execution can eat into the tax benefit, particularly for very active traders.
Spread Betting vs Investing
Financial spread betting is not an obvious replacement for conventional long term investing.
A person buying shares or an equity fund outright owns an investment that can potentially remain in the portfolio for decades without daily leverage financing. Spread betting instead creates a derivative exposure whose holding costs can accumulate over time.
The tax comparison is also more complicated than “spread betting tax free, shares taxable.” UK investors can use Stocks and Shares ISAs and pensions, both of which can provide substantial tax advantages while allowing genuine ownership or fund investment. Long term investors also benefit from dividend income, voting rights in direct shares and no need to maintain leveraged margin.
Spread betting is better understood as an active trading vehicle. It works naturally for traders seeking directional exposure over shorter periods and wanting simple £ per point position sizing.
Using a leveraged bet to replicate an investment intended to remain untouched for twenty years solves very few problems and creates several new ones.
When Financial Spread Betting Can Make Sense
Financial spread betting can be attractive to UK resident individuals who already intend to trade actively and understand leveraged risk.
The tax treatment becomes particularly valuable once profitable trading would otherwise create substantial chargeable capital gains. The ability to move between long and short positions easily can also suit trend, swing, day and macro traders who need flexibility rather than long term ownership.
The £ per point model can simplify risk calculations, particularly for traders who think directly in pounds. A stop 50 points away at £4 per point has an approximate planned loss of £200 before gaps and execution effects. There is relatively little translation required.
Spread betting can also make sense where a trader wants several market categories inside one account. Indices, forex, commodities and shares can often be traded using similar mechanics.
None of those benefits repairs a strategy that loses money before tax. The product should be selected after the trading method, not used as a substitute for one.
When Spread Betting Is a Poor Fit
Long term investors normally have stronger reasons to own assets directly or use conventional investment funds. Spread betting adds leverage, counterparty exposure and potentially ongoing financing without providing shareholder ownership.
Traders who expect meaningful losses alongside taxable investment gains may also value the capital loss treatment available from CFDs. A spread betting loss normally has no CGT value, which can make the tax comparison less attractive during bad years.
People who struggle with position sizing can find the simplicity of £ per point stakes dangerous. Increasing exposure requires only entering a larger number, and available leverage can make oversized positions technically possible even when they are financially unwise.
Spread betting is also heavily associated with the UK. Traders expecting to relocate permanently or operate through international trading infrastructure may find CFDs, futures or other standardised contracts easier to use across jurisdictions.
The right product therefore depends on more than taxation. Account structure, strategy timeframe, pricing and risk behaviour all matter.
Financial Spread Betting in the UK
Financial spread betting offers UK traders a combination rarely found elsewhere: leveraged exposure to financial markets, FCA retail protections and generally favourable tax treatment for ordinary individual speculation.
Its mechanics are straightforward. The trader chooses a market, takes a long or short position and selects a monetary stake for every point of movement. Profit and loss then change with the distance the market moves.
The benefits are real. Ordinary individual winnings are generally outside Capital Gains Tax and Income Tax, position sizing can be intuitive, there is no direct purchase of the underlying asset and traders can speculate in either direction across many markets.
The drawbacks are equally real. Leverage accelerates losses, financing can become expensive on longer term positions, the trader acquires no underlying asset and ordinary spread betting losses normally provide no capital loss relief.
Calling the product “tax free” is therefore broadly accurate for the typical UK individual making genuine speculative spread bets, but it is not a complete description. Companies, commercial hedges and unusual trading arrangements can receive different treatment, and residence outside the UK introduces another tax system entirely.
For the ordinary UK retail trader, the most useful description is simpler. Financial spread betting is a regulated leveraged trading product with unusually favourable treatment for successful private speculation. HMRC generally stays out of the winnings, but it also stays out of the losses.