While a bonus is active most casinos cap the size of one bet, and breaking that cap can cancel the bonus and the winnings made with it. The cap exists because a bigger bet clears the wagering in fewer spins, which changes who finishes it.
Finishing the wagering by bet size
What the rule says
The wording varies: “maximum bet NZ$5 while a bonus is active”, or a percentage of the bonus. The usual penalty is the same: a single bet above the cap lets the casino void the bonus and any winnings that came from it, even if you did not notice you had crossed it. Some operators also cancel winnings from bets placed on features such as buying a bonus round. Read that line before the first spin.
Why casinos set it
Wagering is a number of dollars to be bet, not a number of spins. A NZ$5 bet reaches NZ$8,000 in 1,600 spins; a NZ$1 bet needs 8,000. Fewer spins means fewer chances for the long-run house edge to act, so a player who bets big and gets lucky early can finish with a large balance before the maths catches up. The cap limits that.
What bet size does to your chances
| Bet per spin | Spins to clear NZ$8,000 | Finish with money | Ended above own deposit | Median end balance |
|---|---|---|---|---|
| NZ$0.50 | 16,000 | 15.7% | 14.1% | NZ$0 |
| NZ$1 | 8,000 | 13.9% | 12.8% | NZ$0 |
| NZ$5 | 1,600 | 8.9% | 8.6% | NZ$0 |
The expected cost is identical in all three rows, 4% of NZ$8,000. What changes is the spread. Bigger bets make the balance jump around more, so a larger share is wiped out before the wagering finishes: 8.9% finish at NZ$5 against 15.7% at NZ$0.50. The NZ$5 row also shows an average ending balance above NZ$120, pulled up by a few large wins; its median is NZ$0, the same as in the other two rows.
How these numbers were made. The simulations use a model pokie, not a real game: 96% return to player, medium volatility, a fixed bet on every spin, 20,000 simulated players per case. It shows how wagering behaves; it does not tell you what a particular pokie will do.
A practical rule
- Bet well below the cap: staying at or under 1% of your starting balance (NZ$2 on NZ$200) keeps you clear of the rule and keeps variance down.
- Check whether the cap applies to every game or only to some, and whether it changes after the deposit part of your balance is spent.
- Do not use features that cost a multiple of your base bet (bonus buy, ante bets) without checking that the full price counts against the cap.
Related: what 40x really costs.
Questions readers ask
Does the cap apply to the free spins?
Free spins are usually played at a fixed value, so the cap rarely applies, but the wagering on their winnings often carries its own cap. Check the free-spin terms separately.
What if I accidentally bet above the cap once?
The terms usually let the casino decide. Contact support before you withdraw and keep screenshots; it is safer not to rely on goodwill.