Bonus Wagering Calculator

What is a wagering requirement?

A wagering (or "playthrough") requirement is the number of times you must bet the bonus amount — or your deposit, or both — before the operator lets you withdraw any winnings that came from it. It exists so operators aren’t simply giving away free cash: without it, a player could deposit, claim a bonus, and withdraw immediately. Expressed as a multiplier (commonly written as "20x," "35x," or "50x"), it tells you exactly how much total betting volume stands between claiming an offer and being able to cash out anything it produced.

The multiplier alone doesn’t tell the whole story, though. Two bonuses with the same "35x" headline figure can require wildly different amounts of real money wagered, depending on what base the multiplier is applied to. A 35x requirement on a €50 bonus (bonus-only) asks for €1,750 in total wagers. The same 35x applied to a €50 deposit plus €50 bonus (deposit-plus-bonus) asks for €3,500 — double the wagering for what looks like an identical offer on the surface. Reading past the headline multiplier to find its actual base is the single most useful habit a bonus hunter can build.

How this calculator works

Enter the bonus amount, the wagering multiplier, and the game’s RTP (return to player), and the calculator does three things. First, it multiplies the bonus by the wagering requirement to get your total required wagering volume. Second, it converts that game’s RTP into a house edge (100% minus RTP) and multiplies it by the wagering volume to estimate your expected loss purely from the mathematical edge built into the game — this is the number that matters most, because it’s the average cost of clearing the bonus regardless of any single session’s actual result. Third, if you provide an average bet size and betting frequency, it estimates roughly how many bets — and how long — clearing the requirement will take, so you can judge whether it’s realistic before you start.

Why the math usually favors the house

Every bet you place has a house edge (100% − RTP) baked in. Over the volume of wagering a bonus requires, that edge compounds — the “expected loss” figure above is your wagering requirement multiplied by the house edge. If that number is larger than the bonus itself, the offer is negative expected value on average, even though any individual session could go either way. This is exactly why bonus terms matter as much as the headline percentage: a 100% match bonus with a 50x wagering requirement on a 95%-RTP slot can produce a larger expected loss than the bonus is worth, while the same 100% match with a 15x requirement on a 98%-RTP game can be genuinely worth claiming.

A worked example makes this concrete. Say an operator offers a €100 bonus with a 30x wagering requirement (bonus-only), and you plan to clear it on a slot with 96% RTP. Your total required wagering volume is €3,000 (€100 × 30). The game’s house edge is 4% (100% − 96%), so your expected loss from that volume of play is €120 (€3,000 × 4%) — more than the €100 bonus itself. On average, across many players clearing the same offer under the same conditions, the bonus is a net negative once you account for the wagering, even though any individual player might finish ahead due to variance.

Reading the fine print that changes the numbers

Beyond the multiplier and its base, a handful of other terms materially change what a bonus is actually worth. Maximum bet limits during an active bonus (often €5-10 per spin) can slow progress and, if breached, sometimes void winnings entirely. A time limit (commonly 7-30 days) adds pressure that can force faster, higher-variance play than you’d otherwise choose. Maximum withdrawal caps on bonus winnings mean that even a lucky run may only pay out up to a fixed ceiling, regardless of how much you actually won. And excluded games — often the lowest house-edge table games — remove the cheapest way to grind through a requirement, pushing you toward higher-edge slots instead. None of these show up in this calculator’s three inputs, which is exactly why they’re worth reading in the operator’s bonus terms before you rely on this tool’s output as a final answer.

How experienced bonus hunters use this figure

Serious bonus hunters treat the expected-loss figure as a filter, not a forecast — it tells them which offers are worth the time to clear and which aren’t, on average, across many attempts. They also separate two very different use cases for a bonus: entertainment value (extra playing time for a given bankroll, even at a small expected cost) versus genuine value-hunting (deliberately seeking offers where the expected loss is small relative to the bonus, or even negative, meaning the offer is worth more than it costs to clear on average). Comparing this calculator’s output across several real offers — rather than judging any one bonus by its headline number alone — is what actually separates a good bonus from a good marketing hook.

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