I opened a fresh account in January 2026, funded it with £20 from a Visa debit card and worked through every promotion on the page. 31bets offers a welcome package of up to £250 across your first two deposits plus 100 free spins, a no deposit free spins offer, weekly cashback and slot tournaments. You must wager 40x the bonus amount on each 31bets bonus, so a £150 bonus needs £6,000 of bets before you can withdraw. You enter a 31bets bonus code at registration or in the cashier, and the three codes I tested are listed below.
31bets splits its welcome bonus across two deposits, with a £20 minimum on each. The 31bets casino bonus tops out at £250 across both, and 100 free spins on Book of Dead come with the first deposit.
Bonus Type |
Offer Details |
Wagering Requirements |
First Deposit |
100% up to £150 + 100 free spins |
40x bonus amount |
Second Deposit |
50% up to £100 |
40x bonus amount |
High Roller |
50% up to £500 with code "31HIGH" |
40x bonus amount |
31bets credits the bonus within a minute of a successful deposit and gives you 7 days to use it. The 100 free spins arrive as 20 per day over five days, each worth £0.10.
A £150 bonus at 40x means you wager £6,000 before withdrawing. The maximum bet while a bonus is active is £5, and 31bets voids the bonus and any winnings if you exceed it. Visa and Mastercard debit cards and Open Banking transfers qualify for the offer. PayPal deposits do not, which caught me out on my first attempt.
Tip: Deposit £150 to claim the full £150 match. A £50 deposit returns a £50 bonus.
Free spins without a deposit are the quickest way to test the site before you commit any money.
Bonus |
Code |
Game |
Max Cashout |
25 Free Spins |
31SPINS |
Starburst |
£25 |
20 Free Spins |
31FLASH |
Gates of Olympus |
£20 |
Each spin is worth £0.10, so the 25-spin offer gives you £2.50 of play. My 25 spins on Starburst returned £6.40, which meant £256 of wagering at 40x. To withdraw winnings from the 31bets casino no deposit bonus:
Note: Check the promotions tab after registering. 31bets adjusts its no deposit offers by region, and a UK account may show a different list from the one above.
31bets pays cashback every Monday on the previous week's net losses.
Cashback Percentage |
Eligibility |
Frequency |
Up to 20% |
Net losses of £50 or more |
Each week |
I lost £180 in one week, landed in the 10% tier and received £18 on Monday. The cashback carries 5x wagering, against 40x on the welcome bonus, so it converts to withdrawable cash far faster. Payouts start at £5 and cap at £1,000.
Warning: Losses made with bonus money do not count toward cashback. Read the terms of each cashback promotion, because 31bets changes them for special events.
I found no refer-a-friend scheme in the 31bets promotions tab during testing. If 31bets adds one, look for these features in the terms:
Referred friends will need to register and make a qualifying deposit, probably the £20 minimum.
31bets runs time-limited promotions around major sporting events and holidays, plus a standing slot tournament calendar.
Promotion Type |
Current Offer |
End Date |
Prize Pool |
£50,000 |
Ongoing as of January 2026 |
Tournaments |
Slot leaderboards |
Rotating schedule |
You must opt in to each promotion, and most limit you to a short list of slots. Tournament prizes arrive as bonus funds with 3x wagering.
Fact: The leaderboards rank players by highest single-spin multiplier or by total amount wagered, depending on the event.
Enter 31bets bonus codes during registration or when you make a deposit. Each 31bets casino bonus code works in one of those two places.
When to Enter |
Where to Enter |
Code Examples |
Registration |
Signup form |
31SPINS, 31FLASH |
Deposit |
Cashier, promotions section |
31HIGH |
Important: Some 31bets bonus codes for existing players require previous activity or a deposit history, so a code that works on one account can fail on another.
Every 31bets bonus has a maximum cashout. No deposit spins cap at £20 to £25, and deposit bonuses cap at 10 times the bonus amount. Breaking a term, such as exceeding the £5 maximum bet, voids the bonus and any winnings.
Check the licence in the site footer before you register. A UKGC licence brings GamStop coverage and UK-standard bonus rules. Without one, you get neither. Set a deposit limit before your first top-up, and contact BeGambleAware if gambling stops being fun. 18+ only.