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Best UK referral codes for 2026 — 13 verified bonuses.

13 hand-vetted refer-a-friend bonuses across 8 categories: banking, payments, telecoms, transport, travel, software, fitness and rewards. Every code shows the bonus amount, eligibility, payout timing, and the date HonestCodes last verified it against the brand's own terms.

The highest verified UK referral bonuses on HonestCodes right now: Monzo (Up to £100); TopCashback (£20 bonus); Railway ($20 credit).

Clay illustration of Hugo the squirrel welcoming the viewer with both paws raised, surrounded by small objects representing each category of UK referral code on HonestCodes.

Top UK referral bonuses, ranked by single-bonus value.

#	Brand	Bonus	Who's paid	Category
1	Monzo	£20–£100 personal · £50 business	Both sides	banking
2	TopCashback	£20 sign-up bonus	Both sides	rewards
3	Railway	$20 in deploy credits	New customer	software
4	Forest	£10 ride bonus each side	Both sides	transport
5	Klarna	£10 when you sign up for the Klarna Card	Both sides	payments
6	PayPal	£10 bonus each side after £5 spend	Both sides	payments
7	Rebtel	$10 credit each, both sides	Both sides	telecoms
8	ClassPass	20 bonus class credits to start	Referrer	fitness
9	Revolut	In-app welcome offer for new joiners	Referrer	banking
10	Trip.com	30-day Traincard: 4% off UK rail on Trip.com	Referrer	travel
11	Wispr Flow	Free month of Flow Pro	New customer	software
12	Lime	£4 ride bonus each side	Both sides	transport
13	Voi	£2.50 ride credit on sign-up	Both sides	transport