JamDoughnut code XKNB: £3 welcome bonus plus instant gift-card cashback
Buy from the same few brands on repeat? JamDoughnut lets you pre-buy their gift cards and skim cashback off the top. Sign up with code XKNB and, after your first eligible gift-card purchase, a £3 welcome bonus (usually 300 points) lands in your account — then every gift-card buy earns instant cashback, no weeks of tracking purgatory. One caveat: cashout is commonly £10, so the £3 alone won't escape — stack it with your cashback. Brands, rates and the Jamtastic weekday draws change, so check the live app.
Read our full assessment →Quick answer
Use code XKNB for the JamDoughnut offer. New eligible customers can get £3 bonus + instant cashback after meeting the requirement: First eligible JamDoughnut gift-card purchase. Last verified 2026-06-21.
- Reward
- £3 bonus + instant cashback
- Referral code
XKNB- Last verified
- 2026-06-21
- Difficulty
- Easy
- Time to claim
- 5 minutes
- Time to payout
- After first eligible gift-card purchase
XKNBAd / referral links — we may earn a bonus when you sign up.
How to claim
- Open the JamDoughnut referral link above on your phone.
- Download the JamDoughnut app and create a new account.
- Enter referral code XKNB if it is not applied automatically.
- Buy an eligible JamDoughnut gift card or voucher for a brand you already planned to use.
- Receive the £3 bonus and instant cashback in the app once the first eligible purchase tracks under JamDoughnut's current terms.
- Check the app for Jamtastic weekday prize draws and competitions if you want to take part.
Eligibility & requirements
- New JamDoughnut users only.
- Must use referral code XKNB or the referral link during sign-up.
- Referral posts currently describe the sign-up bonus as £3, usually paid as 300 JamDoughnut points.
- Cashback depends on buying eligible gift cards or vouchers through JamDoughnut.
- You may need to make a first eligible gift-card purchase before the bonus appears.
- Brand availability, cashback rates, and competition terms can change in the app.
Verification notes
- Minimum spend/deposit
- First eligible JamDoughnut gift-card purchase
- Last verified
- 21 June 2026
- Automated source check
- 15 September 2026
Provider terms can change without warning. Treat this as a verification snapshot and confirm the live terms before applying.
Pros
- Clear £3 welcome bonus for new referred users.
- Useful if you already buy from supported retailers.
- JamDoughnut advertises instant cashback rather than waiting weeks for tracking.
- Referral code is short and easy to enter manually.
- The app also runs prize draws and competitions.
Watch out for
- You normally need to buy a gift card or voucher to trigger the bonus and earn cashback.
- Cashback is only useful if you are comfortable pre-buying retailer credit.
- Cashout is commonly reported at £10, so the £3 bonus may not be withdrawable by itself.
- Rates, brands, and competition prizes can change.
FAQ
- What JamDoughnut referral code should I use?
- Use referral code XKNB during JamDoughnut sign-up, or start from the referral link on this page.
- How much is the JamDoughnut sign-up bonus?
- Current referral posts describe it as a £3 bonus, usually paid as 300 JamDoughnut points after your first eligible gift-card purchase.
- How does JamDoughnut cashback work?
- JamDoughnut lets you buy gift cards or vouchers for supported brands and earn cashback in the app, with the public site advertising instant cashback.
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Added 21 June 2026 · Last updated 21 June 2026. Offers and terms change frequently - always confirm on the provider's site before applying.