Casino bonus wagering requirements are one of the most misunderstood aspects of online gambling. They determine whether a bonus is genuinely valuable or simply a marketing tool designed to extract more deposits from players. Understanding how wagering works — and running the numbers yourself — is the most important skill any bonus hunter can develop.
What Are Wagering Requirements?
A wagering requirement is the number of times you must bet your bonus (and sometimes your deposit) before you can withdraw any winnings derived from it. They are expressed as a multiplier — for example, 35x, 40x, or 50x. A 35x wagering requirement on a £100 bonus means you must place a total of £3,500 in bets before the bonus converts to real withdrawable cash.
Some casinos apply the wagering requirement only to the bonus amount. Others apply it to the bonus plus deposit combined — so a 35x requirement on a £100 deposit plus £100 bonus means wagering £7,000. Always check which calculation applies. This information is in the terms and conditions, and if it is buried or unclear, that itself is a warning sign.
How to Calculate the Real Value of a Bonus
Here is the maths. Suppose you receive a £100 bonus with a 40x wagering requirement, playing slots with a 96% return to player (RTP). To clear the wagering, you must bet £4,000. At 96% RTP, you will lose on average 4% of every pound wagered, which equals £160 in expected losses. Since the bonus is only worth £100, you are mathematically expected to lose £60 just to unlock it. This is not a special case — it is how most bonuses work.
A bonus only has positive expected value if the wagering is very low (below 20x) or the RTP of allowed games is extremely high. The break-even point at 40x wagering is approximately 97.5% RTP — higher than almost any slot game on the market.
What Counts as High vs Fair Wagering?
At ByTheGamblers, we consider 35x wagering on the bonus amount only to be the upper limit of what is acceptable. Anything above 35x is high and should be treated with scepticism. Between 20x and 35x is fair. Below 20x is genuinely player-friendly. No wagering bonuses — like those offered by PlayOJO — are the gold standard but rare.
Be especially wary of bonuses that apply wagering to your deposit plus bonus combined. A 30x deposit-plus-bonus requirement is effectively 60x on the bonus alone if your deposit and bonus are equal amounts.
Game Contribution Rates
Not all games contribute equally to clearing wagering requirements. Slots typically contribute 100% — every pound you bet counts in full toward clearing the requirement. Table games such as blackjack, roulette, and baccarat usually contribute only 10% or sometimes nothing at all. Live casino games often contribute 0% to 10%. Video poker is frequently excluded entirely.
This matters because table games have higher RTPs than slots. Casinos restrict their contribution to prevent players from exploiting the bonus on low-house-edge games. If you plan to play table games primarily, a bonus with low table game contribution is essentially worthless to you.
Time Limits and Expiry
Most bonuses expire within seven to thirty days. If you do not clear the wagering requirement within this window, both the bonus and any winnings derived from it are voided. This time pressure encourages players to bet faster and at higher stakes than they otherwise would, which increases the casino’s expected profit. Always note the expiry date before accepting any bonus.
Which Casinos Have the Fairest Bonus Terms?
The fairest bonuses tend to come from casinos that compete on transparency rather than headline figures. PlayOJO’s no-wagering free spins, Rizk Casino’s wager-free Wheel of Rizk prizes, and casinos that clearly display all bonus terms on the promotions page before you opt in are worth prioritising. Read our casino reviews where we rate bonus fairness as a standalone category so you can compare before you deposit.
The simplest rule: if a bonus sounds too good to be true, read the small print. A £500 bonus with 60x wagering is worth less in real terms than a £50 bonus with 10x wagering. Do the maths, or skip the bonus entirely and play with your deposit only.