UK Day Trading Tax Classification (2026/27)
How HMRC decides whether day trading is a trade, 2026/27 CGT at 18%/24% vs Income Tax and Class 4 NI, spread betting, CFDs and crypto, with worked figures.
£40,000 of gains or profit, taxed both ways (2026/27)
| Scenario | Capital Gains Tax | Income Tax (as trade) | Class 4 NI | Total as trade |
|---|---|---|---|---|
| No other income | £6,660 | £5,486 | £1,646 | £7,132 |
| Plus a £60,000 salary | £8,880 | £16,000 | £1,646 | £17,646 |
Income Tax on the trading figure is the extra tax on top of any salary, using the 2026/27 rest-of-UK bands. Class 4 is shown on the profit alone, before the annual maximum that can reduce it for someone who already pays Class 1 NI on a salary. A trader can also set trading losses against other income, which CGT losses cannot be; that is not shown here.
Related guides
- UK CGT Rules - rates and the annual exempt amount.
- UK Cryptocurrency Tax 2026/27 - crypto-specific rules.
- UK CGT 30-Day Rule 2026/27 - share matching.
- UK Going Self-Employed Checklist 2026/27 - if it is a trade.
Frequently asked questions
How are day trading profits usually taxed?
For most individuals buying and selling shares, funds or crypto on their own account, gains are taxed under Capital Gains Tax rather than as trading income: HMRC's guidance on whether dealing in shares and financial instruments is a trade is at BIM56800. For 2026/27, CGT is 18% on gains within the basic rate band and 24% above it, after the £3,000 annual exempt amount (gov.uk). Spread betting is different: winnings from betting are not chargeable gains (TCGA 1992 s.51(1)) and HMRC does not normally tax them as a trade (BIM22015).
When would HMRC treat it as a trade?
HMRC weighs the badges of trade together, none being decisive on its own: profit-seeking motive, the number of transactions, the nature of the asset, similar trading transactions, changes made to the asset, the way the sale is carried out, the source of finance, the interval between purchase and sale, and the method of acquisition (BIM20205). BIM56800 applies these to dealing in shares and financial instruments. Frequency alone does not make someone a trader, so take advice if you trade at volume with borrowed money or as your main occupation.
What is the tax difference?
Under CGT there is the £3,000 exempt amount and no National Insurance, but losses can normally only be set against gains. As a trade, profits are taxed as income with Class 4 NI at 6% between £12,570 and £50,270 and 2% above. On £40,000 with no other income: CGT £6,660; as trading profit, Income Tax £5,486 plus Class 4 £1,646 = £7,132. With a £60,000 salary as well: CGT £8,880; as trading profit £17,646, before any reduction from the Class 4 annual maximum. Figures assume England, Wales or Northern Ireland Income Tax bands and ignore any losses.
How does spread betting work tax-wise?
TCGA 1992 s.51(1) declares that winnings from betting are not chargeable gains, and no chargeable gain or allowable loss accrues on the disposal of rights to winnings. HMRC says a person placing a spread bet is not normally carrying on a trade, is not taxable on the profits and does not receive relief for losses; the bookmaker organising the bet is taxable (BIM22015, which points to BIM22020 for exceptions). So losses on spread bets cannot be set against gains elsewhere.
How are CFDs taxed?
HMRC treats retail contracts for differences as financial futures: unless the profits are trading income, TCGA 1992 s.143 brings the outcome into Capital Gains Tax (CG56100). Every debit and credit on the account - commission and the sums equivalent to interest and dividends - goes into the gain or loss computed when the contract is closed out; those amounts are not investment income and cannot be netted off against income. HMRC Statement of Practice SP03/02 covers when profits are trading income instead. CFDs are not bets, so the s.51 exemption for spread bets does not apply.
What about crypto day trading?
Each disposal - selling for currency, swapping for another token or spending tokens - is a disposal for CGT. Disposals are matched first with same-day acquisitions, then with acquisitions in the following 30 days, then with the section 104 pool at average cost (CRYPTO22200). See our crypto guide.
What records do I need and when must I report?
Keep the date, asset, quantity, price and fees for every purchase and sale. Under TMA 1970 s.12B records must be kept until at least the first anniversary of the 31 January filing date, or the fifth anniversary if you carry on a business (gov.uk record keeping). You must report and pay when taxable gains exceed the £3,000 allowance; if you are registered for Self Assessment you must also report when total disposal proceeds exceed £50,000, even if the gain is within the allowance (gov.uk).