Casino bonuses look like free money until you meet the wagering requirement — the multiplier that stands between a bonus and a withdrawable balance. Understanding playthrough before opting in is the difference between a pleasant extra and a frustrating lock on your own deposit. This guide explains the mechanics in plain language.
Bonus rules differ between offers and change over time, so treat this as the grammar of wagering and always check the current terms of the specific promotion before accepting it.
What a Wagering Requirement Is
A wagering requirement (playthrough, rollover) states how many times the bonus — or the bonus plus deposit — must be bet before winnings become withdrawable. A 35x wagering on a 50-unit bonus means 1,750 units of total bets. You are not expected to lose that amount; turnover includes bets made with recycled winnings, so a normal session generates it gradually.
The requirement applies to stakes, not losses. Every spin, win or lose, counts toward the total as long as it is placed in eligible games within the time limit.
Game Contribution Percentages
Not every bet counts equally. Casinos weight games by their house edge, so the same spin contributes differently depending on where it is placed:
| Game type | Typical contribution | Why |
|---|---|---|
| Slots | 100% | Highest house edge, full weight |
| Table games | 5–20% | Low edge, reduced weight |
| Live casino | 0–10% | Often excluded entirely |
| Excluded titles | 0% | Listed individually in terms |
This is why bonus terms push players toward slots: a roulette bet at 10% contribution needs ten times the turnover of a slot bet for the same progress.
The Rules That Catch Players
Beyond the headline multiplier, four clauses cause most forfeited bonuses:
- Maximum bet while wagering — exceeding the cap (often a few units per spin) can void the bonus and its winnings, even accidentally.
- Time limit — wagering unfinished by the deadline cancels the bonus and everything won from it.
- Withdrawal lock — requesting a payout before completing wagering usually forfeits the bonus.
- Restricted strategies — low-risk patterns like covering most of the roulette table are typically prohibited during wagering.
Deposit + Bonus vs Bonus Only
Two offers with the same "35x" can differ hugely in real cost. Wagering applied to the bonus only is the gentler form; wagering applied to deposit plus bonus nearly doubles the required turnover. A 35x (D+B) requirement on a 100 deposit with a 100 bonus demands 7,000 in bets — versus 3,500 for bonus-only. The terms page states which model applies; it is the first line worth reading.
Related is the sticky versus non-sticky distinction: with a non-sticky (parachute) bonus you play your real money first and can withdraw real-money winnings by forfeiting the untouched bonus — a meaningfully fairer structure.
Calculating Expected Cost
The rough expected cost of wagering is turnover multiplied by the house edge of the games you play. Wagering 3,500 on 96% RTP slots carries an expected cost of about 140 — which can exceed the bonus itself. This does not make bonuses worthless (variance means outcomes spread widely, and the entertainment is real), but it explains why a bonus is a discount on entertainment, not an income stream.
Free spins work the same way: winnings from spins become bonus funds with their own wagering, and spin value plus eligible games are fixed in the terms.
A Worked Example
Concrete numbers make the mechanics stick. Imagine a 100% match on a 50 deposit with 30x wagering on the bonus only. You receive 50 in bonus funds and must turn over 1,500 in eligible bets. Playing 96% RTP slots at 1 per spin, that is 1,500 spins — roughly three to five evenings of normal play. Statistically the expected cost of that turnover is about 60, against a 50 bonus: slightly negative on average, with large swings in both directions.
Now change one variable: the same offer at 20x drops the turnover to 1,000 and the expected cost to 40 — comfortably below the bonus value. This is why the multiplier matters more than the headline percentage, and why comparing offers means comparing the full formula: match percentage, cap, multiplier, base (bonus only or deposit plus bonus), and time limit together.
Deciding Whether to Opt In
Take the bonus when the multiplier is moderate, the game weighting suits what you actually play, the time limit is generous, and you were going to deposit anyway. Skip it when the terms are opaque, the max-bet cap is tiny, or you plan to play mostly live tables. Playing without a bonus is always an option — deposits without attached offers withdraw freely at any time. Compare the current offers on the bonuses page, and keep the glossary nearby for any unfamiliar clause.