Cashback isn't taxed at receipt; it matters when you sell or spend. CGT 18/24 %, £3,000 allowance, crypto-to-crypto swaps are disposals: explained with a table and FAQ.
Short answer: the cashback itself usually isn't taxed the moment you receive it. What's taxed is what you do next with the crypto you received — sell it, swap it, or spend it. In the UK, selling, swapping, spending or gifting crypto are all disposals for Capital Gains Tax (CGT). This guide explains it in plain English, with a table and an FAQ. It isn't personalised tax advice (see the disclaimer at the end).
Why crypto cashback matters to HMRC
Most crypto cards pay cashback in crypto — often a stablecoin (USDC, USDT), sometimes a native token. While it sits in your wallet, nothing happens. The taxable event appears on a disposal: selling for pounds, swapping for another coin, or paying for goods or services. Yes — tapping a crypto card is a disposal of the crypto used, which can create a capital gain.
How crypto gains are taxed in the UK (2025/26)
Gains above your allowance are charged to Capital Gains Tax at:
| Your income band | CGT rate on crypto |
|---|---|
| Basic rate | 18 % |
| Higher / additional rate | 24 % |
Every person gets an annual exempt amount of £3,000 (2025/26): you only pay CGT on gains above it. HMRC works out gains using Section 104 pooling and the 30-day (bed-and-breakfasting) rule, so you can't reset your cost basis by re-buying immediately.
Disposals you must report
- ▸Selling crypto for GBP.
- ▸Swapping one crypto for another — yes, even without touching pounds.
- ▸Spending crypto on goods or services, including every crypto-card payment.
- ▸Gifting crypto (except to a spouse or civil partner).
The specific case of cashback
Where cashback gets nuanced: HMRC may treat rewards differently depending on their nature. Staking and lending rewards are generally income (taxed at receipt on their GBP value, then CGT on later disposal). A spending cashback may instead be treated as a discount or rebate on your own spending — but HMRC has no single blanket rule, so the safe approach is to record the GBP value of every reward at receipt. That figure becomes your cost basis and decides the gain when you later sell or spend it.
The stablecoin angle (and spending fiat)
Cashback paid in a stablecoin has a practical edge: its value barely moves, so the gain between receiving and spending it is close to zero — and a near-zero gain means near-zero tax. A volatile native token can show a real gain (or loss) when used. That's why, in our comparison tool and our 2026 crypto card study, we look at which currency the cashback is paid in, not just the headline percentage. Many users also top up the card in GBP for everyday spending (no disposal) while still earning crypto cashback.
How to report
- ▸Report through Self Assessment, using the SA108 capital gains pages, by 31 January after the tax year ends.
- ▸You must report if your gains exceed the £3,000 allowance, or if total proceeds are high even when the gain is small — plus all crypto income (staking, etc.).
- ▸Keep records of every transaction: date, GBP value, fees. HMRC can ask for years of history.
Frequently asked questions
Is crypto card cashback taxable in the UK? Not at receipt in most cases. It becomes relevant when you sell or spend the crypto: the gain is subject to CGT (18 % or 24 %) above your £3,000 allowance. Staking-type rewards are usually income at receipt.
Is spending crypto with a card taxable? Yes. Spending crypto is a disposal. If the crypto is worth more than when you acquired it, there's a capital gain to report.
Are crypto-to-crypto swaps taxed in the UK? Yes. Every swap is a disposal — unlike France or Germany, there's no deferral.
What is the crypto tax-free allowance? The CGT annual exempt amount is £3,000 for 2025/26. Gains below it aren't taxed, but you may still need to report.
Do I report gains on a non-UK exchange like Binance or Bybit? Yes. UK residents are taxed on worldwide gains, wherever the exchange is based.
This article is for information only and is not tax or legal advice. Rules change and depend on your personal circumstances. For a binding assessment, consult a tax adviser or HMRC (gov.uk).
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