Wagering requirements explained, one line of math at a time

The one-sentence definition

A wagering requirement (also called a playthrough or rollover requirement) tells you how many times you must bet a certain amount before you can withdraw a bonus and anything you win with it. "35x the bonus" on a $100 bonus means you must place $3,500 of bets. Not lose $3,500 — bet $3,500. Every spin counts towards the total, whether it wins or loses, and the same dollar can be bet many times over as it cycles through wins and losses.

That distinction is where most confusion starts. Players see $3,500 and assume they need a $3,500 bankroll. They do not: a $100 bonus that keeps winning back part of each spin can generate thousands of dollars of turnover. What the requirement really controls is how long the house edge gets to work on your balance, and therefore how much of the bonus you should expect to keep.

Step 1: find the wagering base

The multiplier applies to a base, and the terms will say which one. There are two common versions:

• Bonus only. The multiplier applies to the bonus amount. A $100 bonus at 35x requires $3,500.
• Deposit + bonus (D+B). The multiplier applies to both. A $100 deposit with a $100 bonus at 35x requires 35 × $200 = $7,000 — double the turnover for the same headline number.

D+B wagering is the most common way a modest-looking multiplier hides a large requirement. A useful habit is to convert every D+B requirement into its bonus-only equivalent before comparing offers. For a 100% match the conversion doubles the multiplier; for a 200% match it multiplies it by 1.5; for a 400% match by 1.25. That is why a 15x D+B requirement on a 200% bonus — which we see at Lucky Block — behaves like 22.5x the bonus, and why the 30x D+B on the BitGuruz 200% first deposit behaves like 45x the bonus.

Step 2: adjust for game contribution

Not every bet counts in full. Casinos assign each game type a contribution percentage. Slots usually count 100%; blackjack, roulette and live dealer games often count 10–20%, sometimes 0%. The real turnover you need is the nominal requirement divided by the contribution:

Game weighting exists because low-edge games such as blackjack would otherwise make bonuses easy to clear profitably. From the player's side the lesson is simple: clear bonuses on games that count 100%, and play reduced-weight games with cash. Mixing the two silently multiplies the work.

Step 3: turn turnover into an expected cost

Every casino game has a house edge — the share of each bet the casino keeps on average. For slots, house edge is 100% minus the RTP (return to player). A 96% RTP slot has a 4% edge: over the long run, every $100 bet returns $96.

This is the heart of bonus math. The wagering requirement does not "cost" you the full $3,500; it costs you the house edge on $3,500, which is $140 on average. If the bonus is worth more than that, it is positive expected value. If it is worth less, the bonus costs you money on average, however generous the banner looks.

Step 4: compare the bonus with the expected loss

A $100 bonus at 35x on 96% slots is therefore worth about −$40 in expectation. It still buys you a lot of extra playing time, and plenty of individual players will finish it in profit — but on average, across everyone who claims it, it costs more than it gives. Our wagering requirement calculator runs these four steps for any offer and shows each line of the working.

A worked comparison: three offers, one deposit

Take a $100 deposit and three typical offers, all played on 96% RTP slots at 100% contribution:

Notice two things. The 25x D+B offer looks easier than 40x and is actually the most expensive of the three. And the 400% offer has the biggest headline but needs the most turnover by far, because the multiplier applies to a bonus four times the size of the deposit: the expected loss is larger than the bonus, so it is negative too. The headline percentage alone tells you nothing; percentage and multiplier and base together tell you everything. This last example is the BitGuruz welcome offer (400% + 400 Free Spins from a $35 minimum deposit) on our assumed 30x the bonus — check the current terms on the site for the real multiplier. We still rank BitGuruz #1 overall in our rankings for its instant crypto cashouts and casino quality — but we show the bonus cost plainly, and it is fine to play there without the bonus.

The quick rule of thumb

For slots with a 4% edge, a bonus-only requirement breaks even at 25x: 25 × 4% = 100% of the bonus. Below 25x the bonus is positive EV; above it, negative. At 97% RTP the break-even moves to about 33x, and at 95% RTP down to 20x. If you remember nothing else from this guide, remember to divide 100 by the house edge in percent: that is the break-even multiplier.

Clauses that change the math

The formula captures the big picture, but a handful of other terms can turn a good offer bad or void it outright:

• Maximum bet. Usually $5 per spin while a bonus is active. One bet above it can forfeit everything. We cover this in depth in the max-bet rules guide.
• Time limit. 7, 14 or 30 days are common. Divide the spins you need by the days available to see whether the pace is realistic.
• Excluded games. High-RTP slots and jackpots are frequently excluded or weighted lower, which pushes your effective RTP down.
• Maximum cashout. Some bonuses cap what you can withdraw from bonus winnings, often at 5–10x the bonus. A cap clips the upside that makes high-variance strategies work.
• Sticky vs non-sticky. Whether your deposit is played first, or locked in with the bonus, changes the shape of outcomes. See sticky vs non-sticky bonuses.

Why the simple model is still the right one

Advanced bonus analysts simulate millions of sessions to account for players busting before they finish wagering. Busting actually helps you in a negative-EV bonus: you can never lose more than your balance, so the real cost of a 45x bonus is lower than the linear formula says. We still use the linear model in our rankings because it is transparent, reproducible with a pocket calculator, and ranks offers in the right order relative to each other. When we say a bonus is −$60 and another is +$36, the one at +$36 is genuinely the better deal.

A five-step checklist before you claim

1. Find the base: bonus only, or deposit + bonus?
2. Find the multiplier and convert D+B to its bonus-only equivalent.
3. Check which games you will play and their contribution.
4. Run turnover × house edge and compare with the bonus.
5. Read the max bet, time limit and cashout cap — then decide whether to claim or play with cash.

If that sounds like a lot, it is exactly what the BonusMath calculator does in under a second. And remember that every number here is an average: a bonus is a way to get more playing time for your money, never a reliable way to earn it. Set limits before you play — our responsible gambling page explains how.