The short answer

Standard cashback is not taxable income. HMRC treats cashback as a reduction in the price of what you bought, not as income. Just as you don't pay tax on a supermarket discount, you don't pay tax on cashback from a retailer.

Why cashback is treated as a discount

When you buy an item for £100 and receive £5 cashback, HMRC views the transaction as though you paid £95. The £5 was never income — it was a refund of part of the purchase price.

This is the principle HMRC applies to cashback from:

  • TopCashback, Quidco, Rakuten
  • Credit card cashback
  • Bank account switching bonuses (in most cases)
  • Retail loyalty schemes like Nectar, Tesco Clubcard
  • Cashback on groceries (Shopmium, CheckoutSmart)

When cashback *is* taxable

There are three situations where HMRC could treat cashback as taxable income:

1. You're running a business

If you're a sole trader or limited company and you claim cashback on business purchases, the cashback reduces your deductible business expense rather than being income. In practice, this means you record £95 as the expense instead of £100.

2. Cashback becomes your trade

If you systematically buy products *in order to* earn cashback — e.g. buying £10,000 of goods purely to receive £500 cashback and reselling them — HMRC may view that as a trade. In that case, the cashback (net of costs) is taxable profit.

This is rare. It would require a genuine, ongoing, profit-motivated activity. Casual cashback users will never hit this threshold.

3. Sign-up bonuses disguised as cashback

Some "cashback" offers are really referral commissions or promotional payments. If you receive £50 for opening a bank account, HMRC typically treats this as either:

  • Tax-free (most switching incentives), or
  • Taxable income if it's clearly a payment for your time or a commercial arrangement.

The line is blurry. If the payment feels like a bonus for simply signing up, it's usually not taxable. If it's payment for work you did (e.g. completing a specific set of tasks), it might be.

The £1,000 trading allowance

Even if you decide your cashback is taxable, the £1,000 trading allowance lets you earn up to £1,000/year tax-free from any combination of side-income activities — surveys, cashback, small freelance work, crypto earnings.

Below £1,000: no reporting required. Above £1,000: register for Self Assessment and declare.

For cashback alone, reaching £1,000 in a year would require spending roughly £20,000–£30,000 on cashback-eligible purchases at typical rates. Most users earn £150–£600 a year.

What about cashback in crypto?

Some platforms (Bitrefill, Lolli, Fold) pay cashback in Bitcoin or other crypto. That changes the tax treatment:

  • At receipt — the GBP value of the crypto is treated as a price reduction, same as fiat cashback.
  • When you sell or spend it — if the value has changed, you may have a capital gain or loss.
  • Capital Gains Tax — the £3,000 annual exempt amount (2025/26) applies.

For most users receiving a few pounds of crypto cashback, this is theoretical. Keep records if amounts grow.

Do you need to keep records?

For pure cashback below £1,000/year: no. HMRC doesn't require you to report it, and you don't need to keep receipts specifically for tax purposes.

If you're close to the £1,000 threshold, or you're combining cashback with other side income (surveys, freelancing), a simple spreadsheet is worth keeping:

  • Date received
  • Source (site name)
  • Amount
  • Form (cash, gift card, crypto)

Common misconceptions

  • "All side income must be declared" — False. The £1,000 trading allowance covers most casual earning.
  • "Cashback is a gift, so it's tax-free" — Not quite. It's tax-free because it's a discount, not because it's a gift.
  • "I need to pay National Insurance on cashback" — No. NI doesn't apply to cashback.
  • "Cashback counts toward my Personal Allowance" — No, it doesn't count as income at all.

The bottom line

For 99% of UK cashback users, cashback is not taxable. It's a discount, not income. If you're running a business, reselling systematically, or earning over £1,000/year in combined side income, consult an accountant. For everyone else, don't worry about it.

Related: our guide to paid surveys and UK tax covers similar principles for survey income, and are crypto faucets legal covers crypto specifics.