Explainerone question answered

CFD profits are taxable and spread betting is not

Fahad ZarCrypto tax accountant, licensed and regulated by the AAT. MSc Accounting and Finance, BPP University London. Six years reconciling wallet and exchange histories for UK filings.

Published 16 August 2026· Reviewed against gov.uk 25 August 2026· 4 min read·Capital gains tax

Two products, the same market view, opposite tax treatment. Profit on a CFD is a capital gain, taxable above your allowance. Profit on a spread bet is a gambling win, taxed at nothing. Brokers sell them side by side, and the tax difference is not a loophole or a grey area, it is settled HMRC doctrine on both sides. What almost nobody prices in is that the symmetry cuts both ways: the untaxed product also gives you nothing back when you lose.

CFDs, capital gains, both directions

HMRC’s Capital Gains Manual at CG56100 is unambiguous: retail contracts for difference fall under the capital gains regime through section 143 TCGA 1992, unless the rare trading-income exception applies. Every closed position is a disposal. Profits above your £3,000 allowance are taxed at 18% and 24% by the usual income-stacked split, which our calculator handles.

Losses are the flip side and the useful side. CFD losses are capital losses, offsettable against your other gains, shares, crypto, property, and they carry forward once claimed. Claiming is not automatic and the window is four years, the machinery we covered in the losses post. One accounting quirk worth knowing: the interest-like financing charges and dividend adjustments on CFD positions are not treated as interest or dividends for tax, they fold into the capital gains computation of each position. Your broker’s annual statement rarely presents things this way, which makes year-end reconciliation genuinely fiddly for active accounts.

A busy CFD year also walks straight into the reporting thresholds. Gross proceeds across hundreds of closed positions blow past the £50,000 reporting line within months, so a return can be required even in a break-even year, as the reporting guide explains.

Spread betting, outside the system

The spread betting punter is not carrying on a trade, and gambling winnings are not income or gains. HMRC’s Business Income Manual at BIM22015 states it plainly: not taxable on the profits, no relief for the losses. There is a theoretical edge case where an organised operation profiting from the betting public becomes a trade, aimed at bookmakers rather than punters, and ordinary retail spread bettors do not reach it however active they are. The badges of trade post covers why volume alone never gets there.

So the real decision between the two products is a bet on your own results. Expect profits, spread betting keeps them whole. Expect variance, CFD losses at least become tax assets. Most retail traders lose money, which means most retail traders are choosing the wrong wrapper for their actual outcomes, and the ones sitting on years of spread betting losses have nothing to claim for any of it.

Forex and crypto derivatives

Retail forex trading runs through the same two wrappers, spread bet forex is gambling, forex CFDs are capital gains, so the treatment follows the product rather than the currency pair. Crypto sits apart for one regulatory reason: the FCA banned the sale of crypto derivatives to UK retail clients back in 2021, so the crypto CFDs UK traders access are offshore, and the tax analysis of margin and futures positions has its own complications, which our leverage guide works through.

Fahad Zar

Crypto tax accountantAAT licensed 1010475

• AAT Licensed Accountant and MAAT, licence 1010475
• MSc Accounting and Finance, BPP University London
• Six years inside digital asset accounting, across several crypto tax firms
• Practises through Zar Enterprises Ltd, ICO registration ZC225094
• Supervised for anti-money laundering by the AAT

What matters to me is that the number on the return is true, whatever it turns out to be.

Whether this is worth a conversation

Most people who read this page do not need an accountant. A few do.

• Your gains are near the £3,000 line
• You have swapped tokens and doubt the numbers
• You have old losses nobody ever claimed

If you sold one holding once and the figures are plain, file it yourself. Paying someone to check arithmetic you can do is not a service.

If one of these is you, the first look costs nothing.

Claim the free health check