Game weighting explained

What game weighting means for a bonus

A wagering requirement tells you how much you need to bet. Game weighting tells you how much each bet is worth towards that total. A casino sets a percentage for each category of game, and only that share of your stake is counted. At 100%, every pound counts in full. At 20%, a £5 bet counts as £1. At 0%, the bet doesn’t count at all.

Weighting only affects the progress meter. It doesn’t change the bet itself: a £1 roulette bet still risks £1 and pays at the usual odds.

Typical game weighting percentages

Every casino and every offer sets its own table, so the figures below are typical ranges seen across UK casinos rather than any one partner’s terms.

Some offers simply say which games count and treat everything else as 0%. 10bet’s welcome bonus, for instance, must be wagered on slots. Casumo’s terms state that game, play and payment restrictions apply, so the full list is the place to check.

Game weighting worked example

Take a £25 bonus with 10x wagering: £250 of qualifying bets.

The theoretical cost is the total bet multiplied by the game’s house edge. Because low weighting multiplies the amount you must bet, a game with a smaller edge can end up costing more to clear a bonus. Real results vary a great deal from these averages.

Why casinos use game weighting

Bonuses are priced on the assumption that wagering costs the player something on average. On roulette apps, you could bet the same amount on red and black at once and lose very little per spin while still building up wagering. On blackjack apps, basic strategy brings the house edge down to well under 1% on many tables. Weighting stops those patterns from clearing a bonus at almost no cost. The same logic explains why some high-RTP slots are excluded.

Since January 2026, UK wagering has been capped at 10x and promotions can’t mix products, such as sports betting to unlock casino spins. Weighting still applies within the casino product, so it remains one of the most important lines in the terms.

Checking game weighting in a casino app

1. Open the promotions or bonus area and tap the offer.
2. Tap “full terms” or “terms and conditions”, usually a link at the bottom of the offer card.
3. Find the contribution or weighting table and any list of excluded games.
4. Watch your wagering meter after a few bets to confirm progress is counting.

On a phone, terms often open in an in-app browser that scrolls a long way. Using your phone’s find-in-page option, where the app allows it, and searching “contribut” or “excluded” saves time. If anything is unclear, ask live chat before you play and keep the reply.

Related bonus terms

• Max bet rule: the stake ceiling while a bonus is active.
• Bonus expiry: low weighting makes deadlines harder to meet.
• RTP: why high-return slots are sometimes excluded.
• Sticky bonus: another term that affects what you can withdraw.

Bonuses with clear game rules

10bet gives new UK customers a 100% match up to £25 on a first deposit made within 7 days of choosing the casino bonus, wagered 10x on slots within 3 days, with max bonus winnings of £1,000. Casumo gives 50% up to £100 on a first deposit of £20+, wagered 10x within 7 days, max £5 bet. 18+, terms apply.

18+. Gambling should be entertainment that costs money, not a way to make it. Set a deposit limit before you play: how to set limits. Free, confidential help: National Gambling Helpline 0808 8020 133.