Bonus Buy Slots Explained: Pricing, RTP and the Real Cost of Buying Features

Bonus buy slots, also called feature buy slots, let you skip the base game and pay a fixed price to start the free spins round straight away. For many players it is the most exciting button on the screen: no waiting hundreds of spins for three scatters, just straight to the part of the game where the big multipliers live. It is also the fastest way to spend money in an online casino.

This guide explains how studios price a feature buy, how its RTP compares with the base game, why variance changes so dramatically, where the feature is restricted, and what a realistic session actually costs. The short version: a bonus buy is not a trick that beats the slot. It is the same house edge, applied to much larger bets, much more quickly.

How bonus buys work

On a slot with a buy option, a button next to the spin control offers the bonus round for a fixed multiple of your current stake. At a $1 stake, a 100x buy costs $100. You pay once, the game skips straight to the scatter trigger, and the free spins play out exactly as if you had landed them naturally, or in some games with a slightly different starting setup.

Many modern titles offer more than one buy tier. A standard buy might cost 100x, while an enhanced or "super" bonus with guaranteed multipliers, sticky wilds or extra spins might cost 300x to 500x or more. Some games also sell cheaper boosts, such as a guaranteed number of scatters on the next spin. Every tier is priced from the same principle, which is what makes them easy to evaluate once you know it.

Browse games with the feature in our bonus buy slots collection. Studios best known for buy-feature games include Pragmatic Play, Nolimit City, Hacksaw Gaming, Push Gaming, Relax Gaming and Big Time Gaming. You can filter for specific features and providers in our slot database.

How the buy price is calculated

A studio knows, from simulating billions of rounds, the average amount its bonus round pays in multiples of the stake. It then chooses a target RTP for the buy and sets the price so the two line up.

If the average free spins round pays 96.5x the stake and the studio wants the buy to return 96.5%, the price is 100x. If an enhanced version averages 289.5x, the same 96.5% RTP gives a price of 300x. The higher price does not mean worse value. It means a richer feature with the same edge.

This is also why buy prices differ so much between games. A 70x buy is not automatically cheaper than a 200x buy in any meaningful sense. What matters is the RTP attached to the buy and how much variance you are paying for.

Buy RTP versus base game RTP

Studios usually set the buy RTP equal to the base game or a fraction of a percent above it. This is deliberate: if the buy were much worse, informed players would avoid it, and if it were much better, it would cannibalise the base game. A common pattern looks like the table below. The figures are illustrative of typical configurations, not a specific game.

Per dollar, the buy above is 0.3 percentage points cheaper than spinning. That is real, but tiny: on $1,000 of turnover it saves $3. Remember too that many casinos offer several RTP versions of the same game, and the casino's chosen version applies to the buy as well. A slot running its 94% configuration may have a buy around 94% too, which wipes out any edge over the 96% version of the base game elsewhere. Our guide to RTP and volatility explains how to check which version you are playing.

Variance and speed: the real cost

The house edge per dollar barely changes when you buy features. Two things change enormously: how much you wager per minute and how widely results swing.

Turnover per hour

A typical player might make around 600 spins an hour. At $1 per spin that is $600 of turnover and, at 96.2% RTP, an expected loss of about $23 per hour. A player who buys a 100x feature at $1 stake and each round takes around two minutes to play out makes roughly 30 buys an hour, or $3,000 of turnover. At 96.5% RTP the expected loss is $105 per hour, more than four times as much, despite the "better" RTP.

Skewed results

Bonus round payouts are heavily skewed. The average of 96.5x is built from many rounds that pay 10x to 60x, a fair number around the price, and a handful that pay several hundred or thousand times the stake. The median buy, the one in the middle of the pile, typically returns well below its price. That means most buys lose money, and the losses are recovered on average only by the rare big rounds.

Because the spread of a sum of independent results grows with the square root of the number of results, while expected loss grows in a straight line, short buy sessions are dominated by luck and long ones converge on the house edge. Over five buys almost anything can happen; over five hundred, you will almost certainly be close to losing 3.5% of everything you spent.

Worked example: pricing a buy session

Suppose you have a $500 session budget and want to buy the bonus on a slot with a 100x buy and a published buy RTP of 96.5%.

1. Choose the stake. At $1 per spin each buy costs $100, so the budget covers five buys. At $0.20 per spin each buy costs $20, giving 25 buys.
2. Work out the expected cost. If you spend the whole $500 on fresh buys, expected loss is $500 × 3.5% = $17.50. If you re-buy with winnings until you reach $2,000 of total buys, expected loss is $70.
3. Consider the bust risk. With five $100 buys and a median return well below 100x, there is a substantial chance none of the five pays back its price and the budget is gone. With 25 buys at $20, results are smoother and the chance of hitting at least one strong round rises considerably, though the house edge is unchanged.
4. Set a stop rule. Decide in advance, for example: stop when the budget is gone, or stop if the balance doubles. A stop rule does not change expected value, but it limits how long a session runs.

The lesson is the same as for any slot: lowering the stake does not change the edge, but it gives you more rounds for the same money and a far better chance of the session lasting long enough to be enjoyable. Our bankroll management guide covers how to size a budget you can afford to lose.

Ante bets, boosts and feature spins

Many buy-feature slots also sell cheaper ways to improve your chances of the bonus. The most common is the ante bet, which raises every spin by a fixed percentage, often around 25%, in exchange for a higher chance of triggering free spins naturally. Other games sell "feature spins" at a higher price per spin with guaranteed scatters or boosted modifiers.

As with buys, the right question is not "does this improve my chances?" but "does it improve the RTP?". If the RTP is the same, an ante bet is simply a larger stake wearing a different label.

Where bonus buys are restricted

Feature buys raise obvious concerns for regulators: they let players stake large amounts very quickly on a single outcome. Restrictions come from two directions.

Regulators

In January 2020 the UK Gambling Commission published a warning after finding six operators offering "feature buy-in" on slot-style games, in one case costing more than £3,000 to enter the bonus. It reminded licensees that games must meet its remote technical standards, including the rule that products must not encourage customers to chase losses or increase their stakes, and told them to stop offering the functionality. The operators involved had already removed it, and slots supplied to players in Great Britain are released without buy features. Other markets set their own rules, so a game that offers a buy in one country may not in another. Always play at a casino licensed where you live, and check our casino reviews for licensing details.

Casino bonus terms

Even where buys are legal, nearly every casino forbids them while a bonus is active. They usually appear in the terms as a prohibited betting pattern, alongside rules such as maximum bet limits. Buying a feature with bonus money, or with a balance that includes bonus funds, can void the bonus and any winnings. Read our wagering requirements guide before combining an offer from our casino bonuses page with a buy-feature game.

Should you buy bonuses? Playing responsibly

A bonus buy is a legitimate way to play if you understand what you are paying for: instant access to the most volatile part of a game, at the same house edge, at a much higher spend per minute. It is not an edge, a shortcut to profit or a way to "get your money back" after a losing run. Using buys to chase losses is one of the clearest warning signs of harmful play, which is precisely why the UK regulator acted.

• Check the buy RTP and play at casinos running the highest version.
• Size the stake down so a single buy is a small part of your budget.
• Count buys, not just money. Deciding "ten buys tonight" is easier to stick to than a balance target.
• Never buy with bonus funds unless the terms explicitly allow it.
• Use deposit limits and time reminders. The speed of buy sessions makes them easy to lose track of.

If you notice yourself buying features to recover losses, or spending more than you planned, take a break and visit our responsible gambling page for free tools, self-exclusion options and support services.