The banner for a 31bets bonus shows a match percentage, a cap and maybe a batch of free spins. The terms underneath decide whether the offer is worth your £20 deposit.
Read those terms before you pay in. Then look up the licence number from the 31bets footer on the Gambling Commission public register. A UK licence gives you GamStop, BeGambleAware links and a formal complaints route. An offer from an unlicensed operator gives you none of them.
Type the licence number into the register search. The entry should show the operator's name, an active status and a remote casino licence. If the footer lists no number or you find no entry, close the tab. A 31bets casino bonus with no UK licence behind it leaves you with no regulator to contact when a withdrawal stalls.
Some promotions credit automatically after your first deposit. Others want a code typed into a box at registration or in the cashier. Leave that box empty and you may lose the offer, because support teams can refuse to add a bonus once the deposit has cleared.
Copy any 31bets bonus code from the promotions page or from an email 31bets sent to your registered address. Codes carry expiry dates, and 31bets bonus codes listed on third-party pages can lag behind the live offer. Compare the date and wording against the promotions page before you paste anything.
Register with the name and date of birth on your ID, since the verification check compares them. Open the cashier, pick a deposit method and paste the code into the bonus field before you confirm. Check your balance afterwards. Bonus money sits in a separate balance from your cash, and the cashier displays both.
Three causes cover most failures: the code expired, your deposit fell below the minimum, or you chose a payment method the promotion excludes. Send live chat a screenshot of the cashier before you make a second deposit. A 31bets casino bonus code that fails on the first attempt rarely works on the second without support's help.
UK operators cannot accept credit cards, so you deposit with a Visa or Mastercard debit card, PayPal, Open Banking through Faster Payments, or Pay by Phone through Boku. Promotion terms exclude some of these. PayPal and other e-wallets appear on exclusion lists at many casinos, so read the line headed eligible payment methods before you choose.
Pay by Phone deposits carry low daily limits, which can leave a large match bonus out of reach. A debit card or an Open Banking transfer lets you deposit the full qualifying amount in one go.
A UK-licensed casino verifies your identity before it pays out, so upload a passport or driving licence and a proof of address when you register. Withdrawals go back to the method you deposited with, and the first one takes longer than the rest.
A wagering requirement tells you how much you must stake before you can withdraw bonus winnings. The Gambling Commission capped wagering on UK bonuses at 10x from January 2026. Check the current rule on its website, and ask 31bets support for an explanation if a UK offer shows 35x or 40x.
Games contribute at different rates. Slots count in full at most casinos, while roulette and blackjack count for a fraction of each bet. Many operators cap your stake at £5 per spin or hand while a bonus is active. Find the max bet line in the terms and set your stake below it.
Free spins carry a fixed value per spin, such as 10p, and lock to one named slot. Winnings land in your bonus balance with their own wagering requirement. Do the arithmetic on the headline: 50 spins at 10p give you £5 of play, and 200 spins at 1p give you £2.
Cashback returns a share of your net losses over a set period. A 10% weekly return on £100 of losses pays you £10. Check the wagering attached to that £10 before you count it as money in your pocket, because cashback with no wagering beats a bigger match with strict terms. Reload bonuses repeat the welcome offer on later deposits, so apply the same multiplication.
Most forfeited bonuses trace back to a handful of slips. A £10 spin against a £5 max bet gives the casino grounds to void your winnings. Playing a slot the promotion excludes earns no wagering credit. Request a withdrawal during wagering and the casino cancels the bonus and every pound you won with it. Opening a second account or logging in through a VPN lets the casino close both accounts and keep the balance.
Set a deposit limit in your account before you claim anything. A bonus gives you no reason to deposit more than you planned. If gambling stops feeling like entertainment, GamStop blocks you across UK-licensed sites, and BeGambleAware offers free support at begambleaware.org. You must be 18 or over to gamble in the UK.