Bonus buy: what the price reveals about a game's maths
2026-08-13 · Tabea Lindqvist
The price is derived, not offered
When a game sells direct entry into its feature, the studio has to price that entry. The price follows from the feature's expected return, divided by the stake, adjusted for the house edge. That makes it a metric of the game, not a promotion by the operator.
Which gives the most useful reading: the higher the buy price relative to the stake, the more return the studio has shifted into the bonus and the thinner the base game must be. A low price points to a feature that triggers often and pays flat.
The price is therefore always quoted in multiples of the stake, never in euros. Reading it in euros compares two games through your own stake instead of through their maths, and the answer comes out crooked.
Two games, two blueprints
Candy Palace 1000 by Amusnet-Interactive lists a buy feature alongside cascades, a free spins multiplier and a progressive jackpot, at 96.31 percent RTP, medium volatility and a 25,000x maximum win. That kind of build spreads return across several channels at once.
Sweet Candy Cash Megaways Deluxe by Iron-Dog-Studio sits next to it with 93 percent RTP, high volatility and the same 25,000x cap. Identical ceiling, markedly lower return: the routes to that ceiling are narrower here, and buying in changes none of it.
In Candy Palace 1000 the progressive jackpot also draws off a slice of the return that comes back through one very rare outcome only. Components like that have to be factored in when two buy prices are laid side by side.
It is also notable that both titles run cascades yet reach their ceiling by different routes: Candy Palace 1000 through free spins with a multiplier, Sweet Candy Cash Megaways Deluxe through Megaways and a hold-and-win round.
Buying rarely improves the rate
Many titles publish a separate RTP figure for the buy, sitting slightly below or above the base game. Buying purchases time, not advantage. The session gets shorter and sharper, and swing increases because the thin base game no longer acts as a buffer.
The bonus bet field in a data sheet describes something else entirely: a raised stake with altered odds, not direct entry. Candy Links Bonanza 3 by StakeLogic lists both, at 95.8 percent RTP, high volatility and a 5,000x maximum win.
Why a low cap makes buying unattractive
Candy Palace - Christmas Edition, also from Amusnet-Interactive, posts 96.45 percent RTP, medium volatility and a maximum win of 100x. With a ceiling set that tightly there is barely any room between the buy price and the best possible outcome.
Finn and The Candy Spin by NetEnt shows the same from another angle: 96.6 percent RTP, low to medium volatility, a 336x maximum win. Buying in mostly shortens the path to a feature that was calm to begin with.
As a rough rule of thumb: if the maximum win sits below a thousand times the stake, buying in is rarely interesting, because the upper half of the distribution simply is not there.
The price says nothing about hit frequency
Two games can share the same relative buy price and feel nothing alike. In one, almost every purchased feature returns a middling amount; in the other, nine buys in ten land near zero and the tenth carries the rest. A price is an average and knows nothing about distribution.
Candy Mine Megaways by Atlantic-Digital belongs to the broad kind: 94.31 percent RTP, medium volatility, a 5,000x maximum win, plus a bonus wheel, respins and Megaways in one feature block. Many channels mean many middling outcomes.
So a single purchased bonus tells you nothing. Neither do ten. Judging a feature from a handful of attempts measures the variance, not the game.
Where the buy button simply is not there
A data sheet describes the game as the studio built it. Whether a buy feature is offered under a given licence is decided by the regulator, not the studio. The same version can therefore run with or without the button depending on the market.
So it pays to compare the data sheet with the actual game window. If the button is missing, the session changes shape: the base game becomes the only route into the feature, and it takes as long as it takes.
In the German market, online slot play additionally comes with rules on the stake per spin and the minimum duration of a round. Both change a session more noticeably than any buy feature, because they act directly on the number of rounds per hour.
The honest conclusion
A bonus buy is a stake, not access to better arithmetic. It trades playing time for swing, at a price the studio calculated so that the sums work out in its favour.
Reading that number as a metric rather than an offer leads to better decisions about whether a game suits your session at all. Play from 18, and only with money you have planned to lose.
