How Casino Bonus Math Actually Works
The headline bonus number is a marketing artifact. The real
question is: how many dollars of expected value am I getting
after I clear this thing? Five variables determine the
answer.
1. The wagering requirement (WR)
Often written as "30x", "40x", "Bonus + Deposit × 35", etc.
Every $1 of bonus carries a multiple — and you must place that
many dollars in qualifying bets before the bonus and any winnings
become cashable. On slots with a 96% RTP, every $1 wagered
returns ~$0.96 on average. So a 30x wagering requirement on a
$1,000 bonus translates to ~$1,200 wagered against an expected
$1,152 returned — meaning the average player keeps roughly
$952 of the $1,000 bonus after wagering. At 60x
WR, the average player keeps roughly $760. The wagering multiplier
is the single most important number.
2. Game contributions
Not every game counts equally toward wagering. Slots almost always
count 100%. Blackjack, video poker, baccarat, roulette, and live
dealer typically count 5–25%, sometimes zero. If a $1,000 bonus
lists 30x wagering with table games contributing 10%, your real
blackjack WR is 300x. Always read the
contribution table before assuming a strategy game will clear
your bonus.
3. Maximum bet during clearing
Most casinos cap the maximum bet you can place while a bonus is
active — typically $5 to $10 per spin. Place a $25 spin and the
casino may void the bonus and any winnings derived from it. This
rule is enforced automatically at most US-facing casinos but it's
a common cause of disputes. Stay under the cap.
4. Time limit
Welcome bonuses typically expire 30 days after activation.
No-deposit bonuses often expire in 7 days. A $5,000 bonus with
40x wagering requires you to place $200,000 in bets within the
expiry window — at $5 per spin, that's 40,000 spins. The math
gets uncomfortable fast.
5. Maximum cash-out cap
Almost universal on no-deposit bonuses. If a free $25 chip says
"max cash-out $100," that's the most you can withdraw regardless
of how much you accumulate during play. Real-money deposits
usually don't have cash-out caps, but always confirm in the
bonus T&Cs.