A bonus buy lets you pay to enter a slot feature instead of waiting for its ordinary trigger. Its price, return and risk belong to the selected mode. Buying the feature does not make the game profitable or guarantee a large payout.
What a bonus buy actually purchases
A bonus buy is paid entry to a specified slot feature. It may start free spins, respins or another bonus. A mode that increases the chance of triggering a feature is a separate option: it does not necessarily start the feature immediately.
Check the full price in currency before confirming. If the selected stake is 1 unit and the feature costs 100× that stake, the purchase costs 100 units. Changing the selected stake changes the amount charged.
Which RTP applies to the purchase
Do not automatically apply the base-game RTP to a bonus buy. A paid mode may have its own mathematical model; look for the figure for that purchase and game version. A more expensive option does not necessarily have a higher RTP.
If the relevant figure is not disclosed, base-game RTP cannot reliably establish the expected return from buying the feature. The price alone also does not establish its volatility: that requires information about the payout distribution.
An example, not a promised payout
Consider a hypothetical purchase costing 100 units with its own theoretical RTP of 96%. Its expected total payout is 96 units, and its expected net result is a loss of 4 units per purchase.
That is a model average, not a promise to return 96 units. One purchase can return less than its cost, nothing, or a large prize. RTP does not tell you the median payout, the chance of breaking even or the probability of hitting the maximum win.
Why there is no sufficient bankroll rule
A purchase spends the full displayed amount on one entry to the feature. Several consecutive purchases need not recover their cost. There is no universal rule that funding 10–15 purchases ensures an acceptable result.
Set a spending limit beforehand using only an amount you can afford to lose completely. Raising the stake or buying again to recover a previous loss does not improve the expected return of the selected mode.
Conditions to check
Check the exact mode, price, starting and ending conditions, win limits and applicable RTP. Availability depends on the game, operator and market.
Buying an in-game feature is different from accepting a casino promotion. If promotional wagering conditions apply, separately check eligible games, feature purchases, maximum stakes and expiry. The slot description cannot establish those terms.
Separating a feature payout from profit
At a selected stake of 0.20, a purchase priced at 100 stakes costs 20 currency units. If the feature pays 12, the net result is −8. A “win 12” message reports money returned; it does not subtract the 20 spent on entry.
| Purchase | Cost | Payout | Net result |
|---|---|---|---|
| First | 20 | 18 | −2 |
| Second | 20 | 0 | −20 |
| Third | 20 | 27 | +7 |
| Total | 60 | 45 | −15 |
The profitable final purchase does not recover the cost of the whole sequence. Add every paid entry and every payout to calculate that result. Counting only successful features leaves out part of the expenditure.
Check the unit behind a displayed multiplier. With a selected stake of 0.20, a 60x award is 12 currency units, not 60. Compare it with the entire purchase price rather than the cost of one ordinary spin.
In the regulated British market, game rules and the method for determining payouts must be available before payment. The selected mode therefore matters alongside its price. Free-spin features can retain multipliers, add spins or end under different conditions; those differences change how the purchased feature proceeds.