Casino Bonus Wagering Calculator
Terms last read
This wagering calculator shows how much a casino bonus needs in bets before it can be withdrawn and the most it can ever pay out. The curacao-casinos-exempt-from-gamstop.com team built presets from the general terms of the three Curaçao sites we review, plus a UK reference for comparison.
Results use the figures entered. Operator terms can change, and bets above the maximum bet in the terms can void bonus winnings.
Casinos whose terms feed this page
VeloBet
OfferUp to 330% over 3 deposits + 300 free spins
Wagering30x deposit + bonus, 30 days
PayoutE-wallets and crypto
Rolletto
OfferUp to £/€5,500 + 200 free spins
Wagering30x deposit + bonus, 5 days
PayoutBack to the deposit method
Booming Slots
OfferUp to 600% + 250 wager-free spins
Wagering20x bonus (offer), 45x d+b (general)
PayoutCrypto only
Operator links are affiliate links. The order follows our reading of each set of terms and not any payment.
How to Use the Calculator
The calculator needs five figures from a casino's bonus terms. A preset fills them in for the sites we review.
- Choose a preset or select Custom.
- Enter the deposit in pounds.
- Check the bonus percentage, maximum bonus and wagering multiplier.
- Choose whether wagering applies to the bonus only or to deposit plus bonus.
- Enter the average stake per spin to see the number of spins needed.
Reading the Calculator Results
Each result answers one question a player should ask before accepting a bonus. The table explains them.
| Result | What it answers |
|---|---|
| Bonus credited | How much bonus money the deposit unlocks |
| Turnover required | How much must be bet before the bonus becomes withdrawable |
| Spins needed | How many spins that turnover takes at the chosen stake |
| Most bonus play can pay out | The cash-out cap that limits any win from bonus play |
Why Deposit Plus Bonus Doubles the Turnover
Wagering on deposit plus bonus counts both amounts, while bonus-only wagering counts the bonus alone. The difference is large even at the same multiplier.
| Wagering basis | Calculation | Turnover |
|---|---|---|
| Bonus only | £150 × 30 | £4,500 |
| Deposit + bonus | £250 × 30 | £7,500 |
All three sites we review apply wagering to deposit plus bonus in their general terms. The terms used here are defined in our bonus terms glossary.
The Presets and Their Sources
Each preset comes from the operator's general or offer terms. Where the two disagree, we include both.
| Preset | Bonus | Wagering | Cash-out cap |
|---|---|---|---|
| VeloBet | 150% on first deposits of €10 to €500 | 30x deposit + bonus | 10x the deposit |
| Rolletto | 150% up to £/€500 | 30x deposit + bonus within 5 days | 10x the deposit |
| Booming Slots general terms | 200% up to £2,000 | 45x deposit + bonus | 15x on single-deposit accounts |
| Booming Slots offer terms | 200% up to £2,000 | 20x bonus within 7 days | 15x on single-deposit accounts |
| UKGC reference | Any | 10x bonus maximum | Set by operator |
The UK reference reflects the Gambling Commission cap of 10 times the bonus, in force since 19 January 2026. VeloBet pays 150% on first deposits of €10 to €500 and 100% on €500 to €1,000, so first deposits above €500 should be entered as Custom at 100%.
Worked Example at £25
A £25 first deposit shows how the presets compare at a small stake. These figures match the clause matrix on our main page.
| Preset | Bonus | Turnover | Cash-out cap |
|---|---|---|---|
| VeloBet | £37.50 | £1,875 | £250 |
| Rolletto | £37.50 | £1,875 | £250 |
| Booming Slots general terms | £50 | £3,375 | £375 |
| Booming Slots offer terms | £50 | £1,000 | £375 |
Terms note. Running the numbers before a deposit changes most players' decision. A £37.50 bonus that needs £1,875 of bets is often worth less than playing the £25 without it.
Limits of the Calculator
The calculator shows the maths, not the probability of clearing it. Slot RTP, volatility and the max bet clause all affect whether turnover is ever completed.
Bets above the maximum in the terms can void bonus winnings at all three sites, which is €5 per spin at VeloBet, Rolletto and Booming Slots. The full bonus clauses sit in the VeloBet, Rolletto and Booming Slots terms reviews.
18+ only. Gambling involves financial risk. Free, confidential support is available from the National Gambling Helpline on 0808 8020 133.