Bonus buy slots — also called feature buy slots or bonus purchase slots — are online slots that include a button allowing you to pay a fixed multiplier of your stake to trigger the bonus round immediately, without waiting for it to land naturally in the base game.
The feature was first introduced in 2017 by Big Time Gaming in White Rabbit. The mechanic was novel: for the first time, players could choose to pay roughly 100x their stake and jump straight into the free spins. The concept spread quickly. Pragmatic Play, Hacksaw Gaming, Relax Gaming, and most other major studios now include a feature buy in the majority of their high-volatility titles. Today it is one of the most searched-for mechanics in online slots.
The appeal is straightforward. In a high-volatility slot, the base game can be deliberately thin — designed to keep you spinning until the feature lands. That could mean 200, 300, or more base game spins before you see a single free spins round. The bonus buy cuts that wait entirely.
#1
Editor's Pick
#2
21,100x Max
#3
50,000x Max
#4
Megaways
#5
87,378x Max
#6
Multi-Tier Buy
#7
1,000 Spins
#8
100,000x Max
#9
5,000x Max
#10
96.71% RTP
#11
4-Tier Buy
#12
96.97% RTP
#13
50,000x Max
#14
50,000x Max
#15
Wheel Bonus
#16
Sticky Wilds
#17
Collect
#18
New
#19
#20
#21
New
18+ | T&Cs Apply | Gamble Responsibly
18+ | T&Cs Apply | Gamble Responsibly
Every bonus buy slot has a button on the main game screen, usually labeled “Buy Bonus”, “Feature Buy”, or “Bonus Hunt”. Pressing it shows the cost at your current stake and confirms the purchase. The cost is almost always expressed as a multiplier of your bet — typically between 75x and 100x, though some premium titles charge more for guaranteed higher-value bonuses.
Once purchased, the game immediately launches the bonus round as if it had landed naturally. The free spins, multipliers, and mechanics are identical to what you would have received through the base game. There is no statistical difference between a bought bonus and an organic one — they draw from the same random number generation pool.
Some slots offer multiple tiers of bonus buy. Hacksaw Gaming titles like Chaos Crew 2 let you choose between a standard buy (typically 75x–100x) and a premium buy that guarantees a certain number of scatters or a multiplier start position. The premium tier costs more but tilts the initial bonus setup in your favour.
This is where most guides get it wrong. The published RTP of a slot usually covers the entire game — base game and bonus combined. When you skip the base game entirely by buying the bonus, the effective RTP of your session can differ from the advertised figure. In most cases, the bonus round carries a slightly higher RTP than the base game, which means buying actually brings you closer to the theoretical return of the game’s most profitable segment.
However, some providers publish a separate RTP figure specifically for the feature buy. Pragmatic Play is the clearest example — their slots often list a primary RTP (e.g. 96.50%) that includes base game play, and a slightly different figure for the bonus buy specifically. Always check the paytable before you buy: the bonus buy RTP should be at or above the base game RTP. If it’s lower, the buy is mathematically worse.
The golden rule: RTP tells you the long-run return across millions of rounds. In any single session, you can buy a bonus and receive 10x back, or 5,000x back. The RTP does not smooth out in a handful of purchases. Treat each buy as an independent high-variance bet, not an investment.
Bonus buy slots have attracted regulatory attention in several markets. The UK Gambling Commission banned feature buy mechanics in October 2021, citing concerns that the ability to spend large sums instantly on a single bonus purchase represented an accelerated form of play that increased gambling harm risk. UK-licensed casinos must now disable the bonus buy button for players in Great Britain — the slot still exists, but the button simply does not appear.
Similar restrictions exist in Sweden, the Netherlands, and a small number of other regulated European markets. If you are based in one of those regions and the buy button is missing, your casino is complying with local law — the game itself is not broken.
For Canadian players outside Ontario: bonus buy slots are fully available at offshore-licensed casinos. Canada does not have a federal ban on the feature at the federal level, and Canadian-facing offshore casinos offer the full bonus buy experience. Players in British Columbia, Alberta, Quebec, and other provinces can access feature buys without restriction. Ontario players should use iGO-licensed platforms, where bonus buy availability varies by operator and may be restricted per AGCO rules.
In most of the rest of the world — including the United States, most of Latin America, and the majority of Asia — access depends on whether your casino operates legally in your jurisdiction, not on any specific bonus buy regulation.
Mathematically, the expected value of buying the bonus is approximately the same as playing through the base game — because the RTP governs both routes. You are not buying better odds. You are buying time and convenience: the ability to skip 200+ base game spins and land directly in the feature.
If your session goal is specifically to experience a feature round — not to grind the base game — the buy is rational. You know exactly what you are spending (say, $100 at a $1 stake on a 100x buy), and you get the part of the game with the highest entertainment and win potential. For bonus hunters running high-variance strategies, it also lets you accumulate multiple bonus results faster than organic play would allow.
Buying is not a winning system. A bought bonus can return 5x, 15x, 40x — outcomes that represent an 85x to 95x loss on the purchase price. Cold bonuses are common. Gates of Olympus can land 10 free spins with no multipliers and pay less than $20 on a $100 buy. That is a normal statistical outcome, not a malfunction. Before buying, be certain you are comfortable losing the entire cost in a single result.
The worst use of a bonus buy is as a chase mechanism — buying repeatedly after losing sessions hoping to recover losses. The variance compounds, not averages out. Each buy is independent.
Gamble Responsibly. Gambling is entertainment — never chase losses or bet more than you can afford to lose.
If gambling is affecting you or someone you know, free help is available 24/7: