What's a wagering requirement?
It's the number of times you need to bet the bonus amount before you can withdraw anything. Written as a multiplier — "30x wagering" or "35x playthrough."
The formula: Bonus × Multiplier = Total bets required. A £50 bonus at 30x means you need to place £1,500 in bets before you see any of it.
The real cost nobody talks about
Every bet you place has a house edge working against you. At 96% RTP (which is standard for UK slots), the casino keeps 4% of every pound wagered on average. That adds up fast.
| Bonus | Wagering | Bets required | Expected loss | Net value |
|---|---|---|---|---|
| £50 | 10x | £500 | £20 | +£30 ✓ |
| £50 | 20x | £1,000 | £40 | +£10 ✓ |
| £50 | 25x | £1,250 | £50 | £0 (break-even) |
| £50 | 35x | £1,750 | £70 | −£20 ✗ |
| £50 | 40x | £2,000 | £80 | −£30 ✗ |
At 96% RTP, 25x is the break-even point. The UK industry average is 35-40x — which means most welcome bonuses are mathematically designed to lose you money.
Don't do this calculation for every offer. My wagering calculator takes your specific numbers and tells you if it's worth it in seconds.
What does the wagering apply to?
There are three different structures and this matters a lot:
- Bonus amount only — best for you. £50 bonus at 30x = £1,500 required bets.
- Deposit plus bonus — much worse. £50 deposit + £50 bonus at 30x = £3,000 required bets. Twice the playthrough for the same stated multiplier.
- Free spin winnings only — best structure for free spins. If you win £8 from 20 spins at 20x, that's only £160 in bets.
Game choice changes everything
Most casinos don't let all games contribute equally. This is called game weighting and it can completely change the maths.
| Game | Typical contribution | Effective multiplier at 30x |
|---|---|---|
| Slots | 100% | 30x |
| Live roulette | 10-20% | 150-300x effective |
| Blackjack | 10% | 300x effective |
| Video poker | 10-20% | 150-300x effective |
This is why I always use slots to clear wagering — and specifically high-RTP ones. Playing blackjack during wagering is basically throwing money away.
Time limits
Most UK bonuses expire within 7-30 days. Miss the deadline and you lose everything — the bonus and any winnings from it.
- Free spins: 3-7 days (tight — clear these first)
- Welcome match bonuses: 21-30 days (more breathing room)
- Reload bonuses: 7-14 days