Explainerone question answered

Your cashback is almost never taxable and HMRC said so in 1997

Fahad ZarCrypto tax accountant. MSc Accounting and Finance, BPP University London. Four years reconciling wallet and exchange histories for UK and US filings.

Published 25 August 2026· Reviewed against gov.uk 25 August 2026· 3 min read·Self Assessment and side income

No, with two exceptions worth thirty seconds each. Ordinary cashback, the percentage back on card spending, the retailer reward, the bank switching bonus, is not taxable income for a private individual, and this is not a grey area. HMRC published Statement of Practice 4/97 nearly three decades ago precisely to end the uncertainty, and it says most customers are not liable to tax on commission, cashbacks and discounts.

The reasoning holds up in plain language. Tax law reaches income, and a cashback is not income, it is a partial refund of your own spending, a discount that arrives after the till rather than at it. Nothing in the transaction is pure profit in your hands, so there is nothing for income tax to attach to.

Cashback is your own money coming back, and HMRC does not tax you on your own money. It taxes what the money does next.

Exception one, business spending

Spend as a business and the analysis flips. Cashback earned on deductible business costs either reduces the expense you claim or lands as a trade receipt, whichever way round, the taxman gets his share of the discount because the original spending was tax relieved. A sole trader putting £20,000 of costs through a 1% cashback card cannot claim the full £20,000 and quietly keep the £200. If you file for self employment income, this belongs in the books.

Exception two, rewards that are really interest

Some accounts pay a monthly reward calculated on your balance, or conditional on funding the account. Where the payment behaves like interest, a return on money held, it is taxed like interest, inside the personal savings allowance first, then at your marginal rate. With savings rates where they have been, this is exactly the mechanism behind the savings tax letters, and banks report these payments the same way they report interest. The label on the marketing page does not decide the treatment, the substance does.

Crypto cashback, the modern wrinkle

Card rewards paid in crypto add a second event to the same analysis. The receipt itself follows the cashback logic, but the tokens then sit in your portfolio with a cost basis equal to their value when they arrived, and disposing of them later is a capital gains event like any other token. People remember the reward was tax free and forget the disposal is not, and the gap between those two facts is where the errors live. Ordinary loyalty points and airmiles, for completeness, are not taxable at all.