Two bonuses can share an identical headline: 100% match, 35x wagering. And yet one can require roughly twice the betting volume of the other. The variable hiding between them is a single detail: does the wagering requirement apply to the bonus alone, or to the deposit plus bonus combined?
Two different starting points for the same multiple
Some casinos only require you to wager the bonus amount itself. Using the earlier example, a $100 bonus at 35x, that's $3,500 in total betting volume, full stop, regardless of how much you originally deposited.
Other casinos apply the same 35x multiple to the deposit and bonus combined. On a $100 deposit plus a $100 bonus, that base becomes $200, and 35x turns into $7,000 of required wagering, roughly double the volume, for what looked like an identical offer on paper.
Why this detail is so easy to miss
Promotional pages almost never lead with which basis applies. The bonus size and multiple get the spotlight because they're the numbers that sound attractive; whether the multiple applies to $100 or $200 as a base is a structural detail that only shows up if you read the actual terms, not the summary.
Why it's worth checking every time
Because this one variable can double the real-world cost of clearing an otherwise identical-looking offer, it's worth confirming directly on the casino's terms page before assuming either basis. Never assume, the difference between the two isn't cosmetic, it's the difference between a wagering target you might realistically hit and one that's twice as far away.
How the calculator handles it
This is precisely why Edge Wagering includes a dedicated "Wager Applies To" setting rather than assuming one basis by default. Selecting bonus-only versus deposit-plus-bonus changes the qualifying wager the calculator uses, which flows directly into the total volume and expected-value estimate it returns, so the result reflects the specific offer's actual terms, not a generic assumption that might be wrong by a factor of two.