That “100% up to $200” welcome bonus looks free — until you try to withdraw and the casino says you haven’t met the wagering requirement. Understanding how to calculate that number is the single most important skill for getting real value from any casino bonus. This guide shows you the exact formula, worked examples, the game-weighting trap that catches most players, and how to know if a bonus is actually worth claiming.
What is a wagering requirement?
A wagering requirement (also called a playthrough or rollover) is the number of times you must bet a bonus amount before you’re allowed to withdraw any winnings from it. It’s expressed as a multiplier like 30x or 40x. If a bonus carries 35x wagering, you must place bets totalling 35 times the bonus before the bonus funds — and anything you won with them — become cashable.
The wagering requirement formula
The core calculation is simple:
Wagering required = Bonus amount × Multiplier
But the multiplier can apply to one of three bases, and this is where players get caught out:
- Bonus only (B): multiplier × bonus. The friendliest.
- Deposit + bonus (D+B): multiplier × (your deposit + the bonus). Far harsher — effectively doubles the playthrough on a 100% match.
Always check which base applies before you deposit. “30x bonus” and “30x deposit + bonus” are very different commitments.
Worked example: bonus-only wagering
Say you deposit $100 and get a 100% match = $100 bonus, with 35x wagering on the bonus:
- Wagering required = $100 × 35 = $3,500 in total bets.
- You must wager $3,500 before withdrawing bonus winnings.
Worked example: deposit + bonus wagering
Same $100 deposit and $100 bonus, but 35x on deposit + bonus:
- Wagering required = ($100 + $100) × 35 = $7,000 in total bets.
- That’s double the playthrough for the same headline offer.
This is exactly the kind of fine print covered in our guide to casino welcome bonus traps — the multiplier is only half the story; the base it applies to matters just as much.
Game weighting: the hidden variable
Not every bet counts the same toward wagering. Casinos apply game weighting (game contribution), because some games are far easier to win at than others:
- Slots: usually contribute 100% — every $1 wagered clears $1 of the requirement.
- Roulette: often 10–20%.
- Blackjack & video poker: frequently 5–10%, sometimes 0%.
So if blackjack contributes 10% and you face $3,500 of wagering, you’d actually need to bet $35,000 on blackjack to clear it. This is why low-house-edge games are weighted down — the casino doesn’t want you clearing a bonus on a game where you barely lose. Always clear wagering on 100%-weighted games (usually slots) unless you have a specific reason not to.
How to calculate your real playthrough — step by step
- Find the multiplier and what it applies to (bonus, or deposit + bonus).
- Multiply to get the base wagering figure.
- Divide by the game’s contribution % to get the actual amount you must bet on that game.
- Check the max bet rule — most bonuses cap bets (e.g. $5) while wagering; exceed it and you can void the whole bonus.
- Check the time limit — requirements usually expire in 7–30 days.
Example combining everything: $50 bonus, 40x on bonus, slots at 100% = $2,000 of slot bets. The same on roulette at 20% = $10,000 of roulette bets within the time limit. Same bonus, wildly different effort.
Estimating the true cost of clearing a bonus
You can estimate what wagering will actually cost you using the game’s house edge. If you must wager $3,500 on slots with a 4% house edge, your expected loss while clearing is roughly $3,500 × 4% = $140. Compare that to the bonus value ($100 here) and you can see whether the offer is mathematically worth chasing. Understanding house edge is what turns bonus maths from guesswork into a real decision.
What makes a wagering requirement good or bad?
- Good: 0–20x, applied to bonus only, slots-friendly, generous time limit.
- Average: 30–40x on bonus only.
- Poor: 50x+, or applied to deposit + bonus, with low max-bet caps and short expiry.
If you’d rather skip the maths entirely, no-wagering casinos let you withdraw bonus winnings with zero playthrough — a smaller bonus you can actually keep.
Frequently asked questions
What does 35x wagering mean?
You must place bets totalling 35 times the bonus (or deposit + bonus, depending on terms) before you can withdraw bonus-related winnings. On a $100 bonus that’s $3,500 in bets.
Do all games count toward wagering?
No. Slots usually count 100%, while table games like blackjack and roulette count far less (often 5–20%) or not at all. Clearing on a low-contribution game multiplies the bets you need.
Is a lower wagering requirement always better?
Generally yes — but also check the base (bonus vs deposit + bonus), max-bet cap, eligible games, and time limit. A 30x bonus-only offer can beat a 20x deposit+bonus one.
What happens if I don’t meet the wagering requirement?
Unmet bonuses (and the winnings tied to them) are forfeited when the time limit expires or if you withdraw early. Your own deposited funds are usually unaffected, but always read the terms.
Gamble responsibly. Bonuses are marketing tools — only claim ones whose wagering you can realistically and affordably clear, and never chase a bonus with money you can’t afford to lose.
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