Written by: Filip Gromovic Reviewed by: Nashon Khamala
Updated: Jun 2026
Bonus buy slots — also called feature buy slots — let you skip the base game entirely and access the bonus round directly for a fixed price. Every game listed on this page includes a buyable bonus feature, and every one of them is available in demo mode: you can test the full bonus buy mechanic using virtual credits, with no real money involved at any point. That makes demo play the most efficient way to understand what you are paying for before spending real money on a feature purchase.
The feature buy option first appeared in 2017 with White Rabbit by Big Time Gaming, and the catalogue has since expanded to hundreds of titles across dozens of providers — from 50x standard-cost buys to NoLimit City’s 2,000x maximum-configuration purchases. Understanding what separates a well-priced feature buy from a poor-value one, and what the bonus buy RTP means in practice, is what this page covers before you hit that button.
Every bonus buy slot above is available in demo mode — no real money, no registration, no download. In demo play you can use the Buy Feature button with virtual credits, watch the bonus round run in full, and repeat it as many times as you want. This is the most useful application of demo play for bonus buy slots specifically: before spending 100x stake on a bonus buy in a real session, you can trigger the same round multiple times in demo mode to understand the payout range, the mechanic's behavior, and whether the feature is worth its cost. For the latest bonus buy releases, see our new slots page.
Bonus buy slots are slot games that include a dedicated purchase option allowing players to enter the bonus round directly — bypassing the base game entirely. Instead of waiting for scatter symbols or bonus triggers to appear naturally over potentially hundreds of spins, you pay a fixed multiple of your stake and the bonus round launches immediately.
The feature was introduced in 2017 by Big Time Gaming with White Rabbit, which included their trademarked Feature Drop™ mechanic. The concept solved a real player frustration: in high-volatility slots where the bonus round might trigger once every 150–300 spins, reaching the feature that contains most of the game's win potential could require a substantial base-game investment before any meaningful action began. The bonus buy option converted that unpredictable wait into a transparent one-time cost.
Most bonus buy slots behave identically whether the round was bought or triggered naturally — the bonus round is the same product, the RTP calculation applies, and the rules are unchanged. The difference is the entry method: purchased access costs a defined amount, while natural triggering has a variable cost depending on how many base-game spins were required. The bonus buy option makes that cost explicit rather than hidden in base-game variance.
The process is identical in demo mode and real-money play — the only difference is whether virtual or real credits are deducted.
The term "bonus buy" covers several distinct purchase structures. Knowing which type a game uses before testing in demo mode means you know what the different options in the menu actually represent.
The purchase menu looks different depending on which variation a title uses. Each type represents a different cost-to-outcome relationship.
One option, one price — typically 50x–100x stake. The bonus round is the same as a naturally triggered one, with no configuration choices. Used by the majority of mid-range bonus buy titles. The simplest structure to evaluate in demo: trigger it five times and note the payout range.
Multiple price tiers offering progressively enhanced bonus configurations. NoLimit City's standard structure: a 100x buy for the base bonus, a 400x buy for an enhanced version with additional features, and a 2,000x buy for the maximum configuration with every mechanic active. Higher tiers increase both cost and RTP — San Quentin's 2,000x buy increases RTP from 96.26% to 96.95%.
Players purchase an initial bonus configuration and then choose whether to gamble up to a better version. BTG's Extra Chilli starts at 8 spins; each successful gamble increases the spin count, with success probability rising from 50% after the first attempt. Players trade certainty for potential without paying the full upgrade price upfront.
Introduced by BTG in White Rabbit. A special token symbol appears during the base game and chips away at the feature buy price each time it lands. Collect enough tokens and the bonus buy price is reduced — collect the maximum and the feature triggers for free. The only implementation that makes base-game play actively reduce the cost of a future bonus buy.
Allows purchasing a guaranteed number of scatter symbols for the triggering spin — typically 3, 4, or 5 scatters — each at a different price. NetEnt's Serengeti Kings offered this with a dynamic pricing model; buying 5 scatters instead of 3 costs substantially more but guarantees a higher spin count or better starting conditions. Less common but present in a few NetEnt and Red Tiger titles.
ELK Studios' X-citer series offers feature buys as low as 5x stake — substantially below the 50x–100x industry standard. Lower cost corresponds to lower bonus potential. The cheapest tier typically delivers a minimal version of the feature. For players who want to test bonus behavior frequently at low stakes rather than spending large amounts on high-cost tiers.
The cost of a bonus buy is expressed as a multiple of the current stake and represents the expected average cost of reaching the bonus through natural triggering. A 100x buy on a game where the bonus triggers on average every 100 spins at 1x stake costs approximately the same as waiting for the natural trigger — you are paying for certainty and immediacy rather than getting a better deal.
In practice the cost range is wide. The industry standard established by Big Time Gaming sits at 50x–100x stake for a straightforward feature buy. Below that range — ELK Studios' X-citer series at 5x–25x — the purchased bonus is a reduced version of the full feature. Above it, prices climb steeply: Machina Megaways charges 337x, Serengeti Kings can reach 360x for the maximum scatter count, and NoLimit City's top configurations reach 750x in Deadwood and 2,000x in San Quentin and Mental. These are not outliers — they reflect the highest-potential bonus rounds in games with very high theoretical maximum wins.
| Cost Range | What to Expect | Examples |
| 5x–25x | Reduced feature version — lower potential than standard buy | ELK Studios X-citer series |
| 50x–100x | Standard industry range — full base bonus, same as natural trigger | Most BTG, Hacksaw, Relax Gaming titles |
| 100x–200x | Full bonus with enhanced starting conditions or additional mechanics | NoLimit City 100x tier, some Push Gaming titles |
| 200x–500x | High-potential enhanced bonus — typically includes mechanic upgrades | NoLimit City 400x tier, Machina Megaways 337x |
| 500x–2,000x | Maximum configuration — every mechanic active, highest RTP version | Deadwood 750x, San Quentin / Mental 2,000x |
Most bonus buy slots publish two RTP figures: a standard RTP for regular base-game play, and a separate (usually higher) RTP for the bonus buy feature specifically. Understanding the difference between these figures — and what neither of them guarantees — is the most important piece of information for evaluating a bonus buy slot.
The standard RTP covers the entire game including base-game wins and the natural bonus trigger. The bonus buy RTP covers only the purchased bonus rounds. Because the bonus round is where the majority of variance lives in high-volatility titles, the bonus buy RTP is typically higher — the purchase removes the lower-return base-game component from the calculation. A slot with 96% standard RTP might offer 97%–97.5% RTP specifically for the purchased bonus mode.
What the bonus buy RTP does not tell you is the distribution of outcomes. A 97% bonus buy RTP across 1,000 purchased rounds means the average return is £97 for every £100 spent — but individual sessions can vary enormously. A single purchased bonus can return 0x (total loss of the buy price) or several thousand times the stake. The RTP figure is a long-run statistical mean, not a session expectation. Testing in demo mode gives you direct experience of how variable individual bonus round outcomes actually are — something no published RTP figure can convey.
The best bonus buy slots are those where the feature purchase delivers a clearly defined and mechanically interesting bonus round — and where the cost is proportionate to what that round actually provides. These six titles represent the most significant entries across different price tiers and mechanic types.
| Slot | Provider | Buy Cost | Bonus Type | Bonus Buy RTP | Max Win | Best For |
| White Rabbit | Big Time Gaming | 100x (or reduced via tokens) | Free spins + expanding reels | ~97% | 10,000x | Token accumulation buy — original Feature Drop title |
| Extra Chilli | Big Time Gaming | Variable — gamble to upgrade | Free spins with gamble for more spins | ~97% | 20,000x | Players who want to gamble their purchased bonus upward |
| Deadwood | NoLimit City | 71x or 750x | Free spins / enhanced with wild conversion | 96.26%–96.79% | 138,000x | Players comparing standard vs enhanced tier pricing |
| San Quentin | NoLimit City | 100x / 400x / 2,000x | Tiered bonus with xWays + xNudge | Up to 96.95% | 150,000x+ | Players evaluating maximum-configuration bonus buys |
| Bonanza Megaways | Big Time Gaming | ~130x | Unlimited cascade multiplier free spins | ~96% | Very high | Standard-cost buy for a well-known unlimited multiplier bonus |
| Fire in the Hole xBomb | NoLimit City | 150x | Free spins with xBomb expanding reels | ~96.5% | 60,000x | Mid-range cost buy with a distinctive expanding reel mechanic |
Provider identity is the most reliable predictor of bonus buy pricing, configuration structure, and bonus mechanics. Different studios have fundamentally different philosophies about what a feature purchase should deliver and cost.
Big Time Gaming introduced the Feature Drop™ in 2017 with White Rabbit and set the 50x–100x pricing standard that most competitors have followed. Their implementations are distinctive: White Rabbit's token accumulation system lets players reduce the buy price through base-game play; Extra Chilli's gamble structure lets players upgrade their purchased bonus at partial cost; Bonanza Megaways' buy delivers the unlimited cascade multiplier bonus directly. BTG subsequently removed the bonus buy feature from newer titles — they remain the originator but no longer the most active developer in the space.
NoLimit City represents the extreme end of the bonus buy spectrum. Their tiered menu structure — standard, enhanced, and maximum-configuration tiers at 100x, 400x, and 2,000x respectively — gives players explicit control over how much they spend and what version of the bonus they receive. The 2,000x maximum tier in San Quentin and Mental is capped at a maximum bet of €4 to prevent single-session losses from becoming unmanageable — a responsible gambling design choice that limits the real-money ceiling while preserving the mechanic's configuration flexibility. The higher tiers also carry higher RTPs than the standard tier.
Hacksaw Gaming's bonus buy catalogue sits in the standard 50x–100x range with high-volatility bonus mechanics. Their titles (Pray for Six, Fire my Laser, Rise of Ymir) use the buy feature to deliver high-variance free-spin rounds with increasing multipliers and expanding mechanics. The cost is accessible; the outcomes are volatile. Testing these in demo mode before purchasing is particularly valuable because the wide outcome range means individual bonus sessions can appear either very weak or very strong without either being representative of the long-run behavior.
ELK Studios' X-citer series offers bonus buy features at prices as low as 5x stake — far below the industry standard. Each price tier delivers a proportionally scaled version of the bonus: the cheapest tier produces a minimal feature, the most expensive delivers the full mechanic. This structure suits players who want to test bonus behavior at low cost or who want to buy a limited version of a feature to supplement regular play rather than replace it entirely.
Provider philosophy determines cost structure, tier availability, and the relationship between price and bonus quality.
| Provider | Cost Range | Structure | RTP in Buy Mode | Key Titles |
|---|---|---|---|---|
| Big Time Gaming | 50x–130x (standard) | Single buy, gamble upgrade, or token accumulation | ~97% | White Rabbit, Extra Chilli, Bonanza Megaways |
| NoLimit City | 100x / 400x / 2,000x | Tiered menu — each tier adds mechanics and RTP | Up to 96.95% | San Quentin, Mental, Deadwood, Fire in the Hole xBomb |
| Hacksaw Gaming | 50x–100x | Single buy, standard cost | ~96%–96.5% | Pray for Six, Fire my Laser, Rise of Ymir |
| ELK Studios | 5x–100x | Multi-tier scaled feature versions | Varies by tier | Pirots 4, Tropicool 2, Arcanum |
| Relax Gaming | 50x–150x | Single buy or enhanced options | ~96%–97% | Money Train 2, Money Train 3, Templar Tumble |
| Pragmatic Play | 100x (standard) | Single buy + optional Ante Bet mode | ~96%–97% | Gates of Olympus, Sweet Bonanza, Big Bass series |
Demo mode is the most efficient evaluation tool available for bonus buy slots. The ability to purchase the bonus round multiple times with virtual credits — seeing the full range of outcomes without any financial exposure — gives you information that published statistics cannot provide: how the bonus round actually feels across a sample of triggers, and whether the variance profile suits your real-money tolerance.
Ante Bet is a separate mechanic — distinct from bonus buy — that increases the likelihood of naturally triggering the bonus round rather than purchasing it directly. Available primarily in Pragmatic Play titles, the Ante Bet option typically costs 25% extra per base-game spin and doubles the scatter frequency, making the natural bonus trigger approximately twice as likely on each spin.
The key difference from bonus buy: Ante Bet does not guarantee immediate access to the bonus round. You are paying more per spin for better odds, not paying a fixed price for a guaranteed entry. Over a large enough number of spins, the increased scatter frequency will reduce the average cost of reaching the bonus — but any individual session can still involve a long wait before triggering despite the Ante Bet being active.
Gates of Olympus offers both Ante Bet (25% cost increase per spin for increased scatter rate) and a standard 100x bonus buy. In demo mode you can compare both approaches: run a session with Ante Bet active and count how many spins the bonus takes to trigger naturally, then compare that cost to the fixed 100x buy price. That comparison — using your own demo session data rather than theoretical averages — is the most reliable way to decide which entry method suits your playing style.
The bonus buy feature is not available in all markets. The United Kingdom banned bonus buy slots in 2019 following concerns from the UK Gambling Commission that the feature enabled players to spend large amounts in very short time periods — a risk profile considered incompatible with responsible gambling standards in a tightly regulated market.
Players in the UK who load a bonus buy slot will find the Buy Feature button absent or greyed out in casino real-money play. The button may or may not be present in demo mode depending on the game provider's regional configuration. Other regulated European markets have their own varying restrictions — check your local casino's terms if you are unsure whether the feature is accessible in your jurisdiction.
Players in Canada, New Zealand, most of Europe outside the UK, and most other markets where online gambling is legal will generally have access to bonus buy features. The demo mode on this page is available globally — you can test the mechanic regardless of jurisdiction.
The offers below are for players who want to play bonus buy slots for real money with a casino welcome bonus. One important caveat: many casino bonuses prohibit using bonus funds on bonus buy features. Always check the casino's bonus terms before purchasing a feature with active bonus funds — a prohibited purchase can void your entire bonus balance.
97/100
RTP: 96%
Payout: 1–3 days
Games: 200+
EXCLUSIVE BONUS
TOP
98/100
RTP: 98%
Payout: 1–3 days
Games: 500+
NEW
HOT
99/100
RTP: ~96%
Payout: 0–24 hours
Games: 2,400+
96/100
RTP: 99%
Payout: 0–1 days
Games: 2000+
EXCLUSIVE BONUS
TOP
98/100
RTP: 99%
Payout: 0–1 days
Games: 2000+
BONUS
97/100
RTP: 96%
Payout: 1–3 days
Games: 200+
NEW
BONUS
97/100
RTP: 96%
Payout: 1–3 days
Games: 200+
100/100
RTP: 96%
Payout: 1–3 days
Games: 200+
NEW
97/100
RTP: 98%
Payout: 1–3 days
Games: 500+
Bonus buy slots offer something genuinely useful: transparent, immediate access to the part of a high-volatility slot that contains most of its win potential. The cost of that access is known upfront, the bonus mechanics are identical to a naturally triggered round, and in most implementations the purchased bonus carries a marginally higher RTP than standard gameplay. For players who find the base-game grind in high-volatility slots tedious and want to focus their session time on the feature itself, the bonus buy option is a rational choice.
The practical recommendation is to use demo mode systematically before any real-money bonus buy session. Trigger the feature five to ten times with virtual credits, note the payout range across those triggers, and calculate the actual cash cost at your intended stake. The standard 50x–100x cost level is manageable at low stakes; the 400x–2,000x tier in NoLimit City titles requires a deliberate budget decision. Demo play transforms the bonus buy from an impulse purchase into a considered one — which is exactly the right use of the feature.
Continue exploring: high volatility slots, free spins slots, Megaways slots, new slots 2026.
Bonus buy slots — also called feature buy slots — allow players to purchase immediate access to the bonus round by paying a fixed multiple of their current stake. Instead of waiting for the bonus to trigger naturally through base-game play, the player pays a defined price (typically 50x–100x stake, up to 2,000x in some NoLimit City titles) and the bonus round launches immediately. The feature was introduced by Big Time Gaming in 2017 with White Rabbit.
In most titles, yes — the purchased bonus round is identical to a naturally triggered one. The same symbol values, multiplier structures, retrigger mechanics, and win potential apply regardless of entry method. Some tiered buy systems offer enhanced configurations at higher prices that deliver a better version of the bonus than the standard natural trigger — these are exceptions to the general rule and are clearly labelled in the purchase menu.
Costs range widely: ELK Studios' cheapest options start at 5x stake; the standard industry range is 50x–100x; NoLimit City's maximum configurations reach 2,000x. The cost is multiplied by your current stake to give the real-money price — a 100x buy at £0.50 per spin costs £50. Always calculate the actual cash cost at your intended stake before purchasing, not just the multiplier label.
Usually marginally higher. The bonus buy RTP reflects only purchased bonus rounds and typically exceeds the standard game RTP by 0.5%–1.5% because it removes the lower-return base-game component from the calculation. NoLimit City's 2,000x maximum tier specifically increases RTP compared to the 100x standard tier. However, RTP is a long-run statistical mean — individual purchased bonus rounds can return anywhere from 0x to thousands of times the buy price regardless of the published RTP figure.
Yes. Every bonus buy slot on this page is available in demo mode — no deposit, no registration, no download required. In demo mode, the Buy Feature button uses virtual credits. This lets you purchase the bonus round multiple times without any real-money exposure, test different tier configurations if available, and form a realistic view of the payout range before spending real money. Note: some casino platforms disable the Buy Feature button in demo mode for bonus buy slots — if this occurs, the game demo is still available for regular base-game practice.
Yes. The UK Gambling Commission banned bonus buy features in October 2019. UK players playing at licensed casinos will find the Buy Feature button absent or inactive in real-money play. The ban applies to UK-licensed operators only — players in other jurisdictions where the feature is legal retain full access. Demo play on this page is not affected by the UK ban.
Usually not. Most casino welcome bonus terms explicitly prohibit using bonus funds for bonus buy purchases. Using bonus funds on a restricted action (including bonus buys in many casinos) can void the entire bonus balance. Always read the specific terms of any active casino bonus before using the Buy Feature button. This restriction does not apply to real-money funds — only to funds subject to wagering requirements from a claimed bonus.
NoLimit City's San Quentin and Mental offer the most expensive standard bonus buy configurations at 2,000x stake for the maximum tier. To prevent excessive single-session spending, NoLimit City caps the maximum bet at €4 for the 2,000x tier — limiting the maximum real-money cost to €8,000 per purchase. Deadwood from the same studio offers a 750x maximum tier. These represent the extreme end of the market; the industry standard remains 50x–100x.
Bonus buy purchases immediate access to the bonus round for a fixed price. Ante Bet (available in Pragmatic Play titles) increases the cost of each base-game spin by approximately 25% in exchange for a higher scatter frequency — making the bonus more likely to trigger naturally, but not guaranteeing it. Bonus buy gives you certainty about when the bonus starts; Ante Bet improves probability without eliminating the wait. Gates of Olympus offers both options — demo play allows you to compare the effective cost of each approach across a session.
This guide was written and reviewed by our iGaming team. It covers how bonus buy slots work, the six main purchase structure variations, cost ranges across providers, what the bonus buy RTP actually means in practice, jurisdiction restrictions, and how to use demo mode to evaluate a feature buy before spending real money. All descriptions are based on published game specifications and direct demo-play testing.
Senior iGaming Writer
Filip Gromovic
Filip Gromovic wrote this guide. He specialises in explaining slot bonus mechanics, feature buy structures, and RTP implications in practical terms that help players make informed real-money decisions.
More about Filip Gromovic
Senior iGaming Reviewer
Nashon Khamala
Nashon Khamala reviewed this article for factual accuracy, verifying that all bonus buy pricing, RTP claims, provider descriptions, and jurisdiction information accurately reflect current industry practice.
More about Nashon Khamala
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