Wagering requirements are the single most important number in any bonus offer, yet they are often buried in terms and conditions. In simple terms, the wagering requirement tells you how many times you must play through a bonus or deposit before any winnings can be withdrawn. A 35x requirement on a £20 bonus means you must stake £700 in total before cashing out. Compare that figure across three or four sites and the difference in real cost becomes obvious. This guide explains how to read the numbers properly so you can judge an offer on its merits rather than its headline value. Discover further information on full guide.
UK-licensed casinos must display key terms clearly, and the Gambling Commission’s advertising rules require that significant conditions are given equal prominence to the offer itself. That said, the presentation still varies widely between operators. Some quote the multiple against the bonus only, others against the bonus plus deposit, and a few against the total balance. Learning to spot which base is being used is the first and most valuable comparison skill you can develop.
Read the Base Figure Before the Multiple
A “40x wagering” claim means nothing until you know what the 40 is multiplied against. The three common bases are bonus only, deposit plus bonus, and occasionally the total of both plus any extra free spin winnings. Take a £50 bonus at 40x: the playthrough is £2,000. The same £50 bonus at 30x on deposit plus bonus (£100 total) is £3,000 , worse, despite the lower-looking multiple. Always multiply the stated figure by the base yourself before comparing offers side by side.
Watch for separate requirements on free spins. Winnings from spins are often credited as a bonus with their own wagering, sometimes at a higher multiple than the main offer. A £10 spin win at 50x carries a £500 playthrough that sits outside the headline number. Add these together when you build your comparison.
Contribution percentages are the next trap. Most slots count 100 per cent towards wagering, but table games and live casino titles frequently contribute 10 per cent or less, and some count nothing at all. A 35x requirement effectively becomes 350x if you only play blackjack. Check the game weighting table before you commit, because the stated multiple assumes you play qualifying slots.
Time limits deserve equal attention. Thirty days is common, but some offers give seven. Divide your total playthrough by the days available to see whether the pace is realistic: £2,000 over seven days is £286 per day, which is a very different proposition from the same sum over 30 days.
Build a Like-for-Like Comparison Table
The clearest way to judge value is to normalise every offer to the same base. The table below shows how three fictional UK offers compare once each figure is converted to a deposit-plus-bonus basis. Note how the headline percentage misleads in the middle column.
| Offer | Stated Multiple | Base | Normalised Playthrough | Max Bet |
|---|---|---|---|---|
| Offer A | 35x | Bonus only (£20) | £700 | £5 |
| Offer B | 30x | Deposit + bonus (£60) | £1,800 | £5 |
| Offer C | 40x | Bonus only (£50) | £2,000 | £10 |
Maximum bet rules sit alongside wagering and can void a bonus entirely if breached. A £5 cap is typical, and exceeding it even once may forfeit the bonus and any winnings attached to it. Factor the cap into your staking plan , a high playthrough with a low cap simply takes longer.
Finally, check the maximum win clause. Many bonuses cap withdrawable winnings from the bonus at £100 or £250, regardless of how much you win. If the cap is low, a generous-looking 20x requirement can still return very little.
Also confirm whether the bonus is cash or bonus funds, and whether a real-money balance is used first. Some sites let you withdraw your own deposit before touching the bonus, which changes the risk calculation considerably. Reading these four numbers , base, contribution, time limit and win cap , takes five minutes and will tell you more about an offer than any promotional banner ever could.
Gamble responsibly. Bonuses are incentives to play, not guaranteed value, and only stake what you can afford to lose. Support is available through GambleAware and the National Gambling Helpline on 0808 8020 133.