Answers · UK 2025/26

Is day trading taxed as income or Capital Gains Tax in the UK?

For most individuals, profits from buying and selling shares or other assets — even frequently — are taxed under Capital Gains Tax, not Income Tax, using the £3,000 annual exempt amount. Only if HMRC's "badges of trade" tests conclude you are running a trading business (very high frequency, short holding periods, financed by borrowing, treated as your main livelihood) would profits instead be taxed as trading income.

Last updated: 4 July 2026Last reviewed: 4 July 2026How we verify

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Whether day trading profits are taxed as Capital Gains Tax or Income Tax depends on HMRC's "badges of trade" — a set of factors developed through case law to distinguish investing from trading as a business. These include: the frequency and volume of transactions, how quickly assets are bought and sold, whether the activity is financed by borrowing, whether there is a profit-seeking motive from the outset, the degree of organisation involved, and whether the individual has other employment or treats trading as their primary occupation. For the vast majority of individuals who trade shares, even frequently, through an ordinary trading platform or ISA/SIPP, HMRC treats gains as capital in nature — meaning they fall under Capital Gains Tax, with the first £3,000 of gains each tax year exempt (the Annual Exempt Amount), and everything above taxed at 18% for basic rate taxpayers or 24% for higher/additional rate taxpayers on most assets in 2026/27. If HMRC determines someone is actually running a trading business — extremely high transaction volumes, very short holding periods measured in minutes or hours, using borrowed money, and treating trading as their main source of income rather than employment — profits would instead be taxed as trading income under Income Tax and Class 4 National Insurance, which is a materially different (and usually higher) tax outcome. In practice, HMRC has successfully argued "trading" status in only a small number of contested cases, and most active retail traders remain within the Capital Gains Tax regime. Trading within a Stocks & Shares ISA remains entirely free of both Income Tax and Capital Gains Tax regardless of frequency. Use the Capital Gains Tax calculator to estimate liability on gains outside an ISA.