A “100% up to $500” bonus sounds like free money. The wagering requirement attached to it usually tells a different story. A 35x requirement is common — and easy to underestimate, because the figure that matters is not the bonus, but the turnover the bonus forces.
The basic arithmetic
Take a $100 bonus at 35x. Before any of it can be withdrawn, $3,500 must be wagered. On a slot with a 4% house edge, the expected cost of putting $3,500 through the game is around $140 — already more than the bonus is worth on paper. That single calculation explains why the headline figure is the least important number in any offer: a large bonus with a high requirement can have a negative expected value before a player even begins.
Two details that make it worse
First, whether the multiple applies to the bonus alone or to the deposit plus the bonus. A “35x (bonus)” requirement on a $100 bonus is $3,500 of turnover. A “35x (D+B)” requirement on a $100 deposit and a $100 bonus is $7,000 — double the work for the same headline. The terms always state which applies; the difference is easy to miss and expensive to ignore.
Second, game weighting. Not every bet counts the same toward the requirement. Slots usually count 100%, but table games such as blackjack and roulette often count just 10%, or are excluded entirely. Clearing a $3,500 requirement on blackjack at 10% weighting means actually wagering $35,000 — ten times as much. Players who try to clear a bonus on a low-edge table game frequently find the requirement barely moves.
Where 35x sits on the scale
On its own, “35x” carries no meaning until it is placed against the range operators actually use. In practice, requirements run from about 20x at the favourable end to 50x or higher at the punishing end, so a 35x figure sits squarely in the middle. That is exactly why it reads as ordinary and slips past so easily. The number worth watching is not whether a requirement is typical, but what it implies in turnover once the bonus size and the game weighting are folded in. A 25x requirement applied to deposit plus bonus can demand more real wagering than a 40x requirement on the bonus alone. The label rarely tells the whole story, and two offers advertising the same multiple can sit a long way apart once the terms beneath them are read line by line.
Comparing offers honestly
The useful test is not “how big is the bonus” but “how much turnover does it demand relative to what it adds”. A $50 bonus at 20x ($1,000 turnover) can be worth more in practice than a $200 bonus at 45x ($9,000 turnover), once the expected cost of the wagering and the game weighting are accounted for. A small, transparent offer with low requirements often beats a large one wrapped in restrictive terms.
Before you opt in
Three numbers decide whether a bonus is worth taking: the wagering multiple and what it applies to, the game weighting for whatever you intend to play, and any maximum-cashout cap that limits what you can keep. All three are published in the bonus terms. Reading them first — rather than after the balance is locked — is the entire difference between a bonus that adds value and one that simply ties up a deposit. The full breakdown of each term is in the guide to casino bonuses.