Bonus Buy Slots

The best part of playing slots is triggering the bonus round, where the game springs to life and your chance of winning big skyrockets. The only problem is that it can take literally hundreds of spins to unlock the feature. The solution: bonus buy slots! Here we’ll explore slots that allow you to buy access to the bonus feature immediately!

What is a Bonus Feature? How Does It Work?

A bonus feature is a special mode in slot machines that makes your spins more rewarding. This is not the same as a casino bonus, as it is something you win in the game rather than something the casino offers with terms and wagering requirements.

There are many different versions of the bonus feature. The most common slot bonuses are free spins and respins. During bonus rounds, you’ll also encounter others, from sticky wilds to random multipliers to jackpots.

Bonus buy slots don’t just have these rewarding bonuses – they also give you the option to trigger them manually. To do this, you need to spend a multiple of your stake. For players, the logic is that buying one of these could pay off if you win more than the stake in the ensuing bonus game. However, this isn’t guaranteed and, like every spin, it’s a gamble. When you hit the buy button, you’ll be instantly transported to the feature, allowing you to enjoy the bonus round.

Bonus Buy Features from Different Providers

Bonus buy features vary from provider to provider, with some being known for including this option in all their games. Where one game provider might use a flat buy bonus feature, others instead give players a variety of boost options. Check out examples of both approaches below!

Pragmatic Play

Pragmatic Play are one of the biggest names in this space. Most of their biggest slot releases come with two options that players can pay to activate:

• Buy Free Spins (100x your bet): This is your standard buy bonus feature, where players guarantee that enough scatters land to start free spins.
• Ante Bet (20x to 30x your bet): The 20x version resumes normal play with raised stakes. The 30x version increases the likelihood that free spins get triggered.

Did you know? In December 2025 the studio released the slot Fortune of Olympus, which offer many different bonus buy options.

Nolimit City

Most know Nolimit City due to their zany and sometimes dark slots, but they’re nice enough to provide buy bonus features to help players navigate them. Nolimit calls them xBoosts, and they’re available for some slots but not for others. If there are multiple tiered bonus rounds, like in Tsar Wars, there’s often an xBoost option for each mode at 5x, 12x, 30x, and 60x your bet.

Push Gaming

Push Gaming is one of those providers whose buy bonus options vary between games. Their Jammin’ Jars slot asks for a flat 84x stake to trigger free spins, while other popular Push titles like Razor Returns have five different options:

• 3 Free Spins (106x your bet): The lowest option, buying the weakest version of free spins for just over 100x.
• 4 Free Spins (186x your bet): The mid-level version of free spins, which comes with a x5 multiplier.
• 5 Free Spins (550x your bet): The best version of free spins with a 25x multiplier, demanding a hefty up-front stake.
• Random Free Spins (200x your bet): Another gamble that gives the player the chance to get the 5 Free Spins bonus at a discount.
• Razor Reveal (500x your bet): Grants access to the slot’s mystery symbol bonus feature.

Relax Gaming

Relax Gaming have also hopped onto this trend, offering players the option to fast-track themselves to a slot’s bonus round. This is best exemplified by their hit Money Train series. In the first one, there’s just one buy option – a flat 80x stake. By Money Train 4, they have fleshed this out with two options: a 100x buy or a 500x version that guarantees one of its iconic characters appears during the round.

ELK Studios

ELK Studios has taken its range of bonus buy slots to the next level with its X-iter mechanic. With a click of a button, you can purchase the following features:

• Bonus Hunt (3x your bet): Quadruples your odds of triggering the bonus game.
• Level 3 (10x your bet): One free drop
• WX (25x your bet): Multiplier symbols suddenly turn wild.
• Bonus Game (100x your bet): Guaranteed entry to the bonus round, where you’ll enjoy 7 free drops.
• Superbonus (500x your bet): 7 free drops with multipliers and upgraded symbols.

Bullshark Games

As a rule, Bullshark Games throws buy bonus options into all of their slots. That’s why they won our Bonus Buyer award at the Slotsoo Game Provider Awards 2025. Their hit games like Age of Seth have multiple options, with two chance boosts and two outright buy bonuses:

• Bonushunt Featurespins (5x your bet): Makes free spins 5x more likely to trigger, but it’s not guaranteed.
• Seth’s Favor Featurespins (50x your bet): Adds one grid boost to the game.
• Seth’s Blessing (100x your bet): Guarantees at least one free spin with four grid boosters.
• Seth’s Might (300x your bet): Guarantees at least two free spins with four grid boosters.

How Much Does It Cost to Buy Free Spins

The average cost to buy free spins is 100x your bet. That said, it varies depending on the provider. Buying free spins in E-Force by Yggdrasil costs as little as 50x, while in Big Bass Floats My Boat, expect to drop 300x your stake to unlock the bonus round.

Even with the same provider, one slot might offer a flat bonus buy option for free spins, while another has multiple options. Take our Push Gaming example from above – Jammin’ Jars has just one option, while Razor Returns has five. When players have multiple options, they are also priced differently and can reach up to 550x your bet.

Best Bonus Slots

If you’re just here to find the best bonus slots, then you’ll want to check out this table. Here we’ve gathered highly regarded feature buy slots from some of the biggest developers. We’ve even described each bonus buy, so you know what you’re getting into.

Feature Buy Slots – Slotsoo’s Top Picks

What about our personal favorite bonus buy slots? You can read our answers below.

Markus Björk: Fire in the Hole

I think feature-rich slots have the best bonuses because they give players multiple buy options. Nolimit are good at this – I like Fire in the Hole. It gives you three options, starting at 60x and ending at 500x. Decide your risk tolerance and then choose the best option for you.

Fire in the Hole Nolimit City

4.2/5

RTP 90.02% - 96.06%

MIN BET 0.2€

MAX BET 50€

MAX WIN 60000x

REAL MONEY

DEMO PLAY

Maria Johnson: Gates of Hades

I love Pragmatic’s approach to bonus buy slots, so it’s definitely one of their games. Right know it is Gates of Hades, since it adds reel multipliers that make the free spins stand out against the studio’s other Greek games. Spend 500x your bet, and you can guarantee those multipliers start at 10x.

Gates of Hades Pragmatic Play

4.3/5

RTP 94.47% - 96.52%

MIN BET 0.2€

MAX BET 240€

MAX WIN 10000x

REAL MONEY

DEMO PLAY

Gates of Hades Review

Jonas Virtanen: Vikings Go Berzerk Reloaded

I like Vikings Go Berzerk, so one of my favorite buy bonuses is in the remake. The original lacks a buy option, and Yggdrasil solved this by adding one to the Reloaded version. It’s quite simple – 7 spins for 75x – and cheaper than a lot of buy bonuses. Try it out if you like this series!

Vikings Go Berzerk Reloaded Pragmatic Play

4.4/5

RTP 96%

MIN BET 0.25€

MAX BET 50€

MAX WIN 12500x

REAL MONEY

Walter Möller: Emberfall

The best Slotmill games combine free spins with progressive multipliers, and then offer several buy bonuses for each feature. I like Emberfall’s bonus the best – you can choose between a 50% free spins chance, a multiplier boost for 40x, 8 spins for 100x, or 8 super free spins for 500x. Check it out if you like bonus buy variety.

Emberfall Slotmill

4.6/5

RTP 94.10% - 96.10%

MIN BET 0.2€

MAX BET 60€

MAX WIN 15000x

REAL MONEY

DEMO PLAY

The Availability of Bonus Buy Slots

Like RTP, autoplay and other slot mechanics, bonus buys are subject to the regulations that affect international audiences. Gambling authorities in many countries have banned bonus buy slots, since they believe it promote excessive gambling. (This type of restrictions usually leads to players moving to MGA casinos and other jurisdictions with more freedom…)

Within Europe, the rules surrounding bonus buys varygreatly. Sweden, Finland and other Nordic countries allow this popular feature, while United Kingdom, Greece, The Netherlands and Belgium belongs to the growing number of countries that have banned bonus buys.

Much like the countries themselves, providers also have differing opinions on bonus buys. You won’t find bonus buys in Play’n GO slots, for example, and the CEO of the Swedish studio has promised that they’ll never appear in their games.

Casinos with a Dedicated Section for Bonus Buy Slots

Casinos often group slots by their features, best seen with dedicated sections for Megaways or Hold and Win mechanics. Bonus buys are no different – many casinos gather them all together so players know where to find them.

Winnerz

Winnerz is one of those casinos, dividing their games by sections like new, live casino, jackpot, and, of course, bonus buy. There, players like you can find bonus buy slots from studios big and small, from Relax Gaming’s biggest hits to newer studios like Peter & Sons. As for the games themselves, you’ll have to go explore them yourself!

4.8/5

Welcome Bonus

200 + 150 Free Spins

Wagering Requirement: 30x

VISIT CASINO

Stupid Casino

Stupid Casino is another one of our top reviewed casinos that separates slots by feature, with a section reserved for ‘bonusbuy’. There you’ll find a diverse collection of 800+ themed slots, all united by some kind of bonus buy feature. Visit their site to check out the games and see what bonuses they offer.

4.8/5

Welcome Bonus

100% up to €300 Wager Free + 80 Free Spins (Slotsoo Exclusive)

Use bonus code FIRST (for deposit). Then contact support with bonus code EX

VISIT CASINO

Rollino

Rollino also groups slots by feature, and even uses nifty icons to show players what they can expect. The hot section is a fire emoji, for example, and the bonus buy section is represented by a treasure chest cracked open, filled with gold and jewels. There you can scroll through one of the most expansive buy bonus sections we’ve seen on a Slotsoo reviewed site.

4.7/5

Welcome Bonus

200% up to €1000 + 100 FS

Wagering Requirement: 30x + 40x

VISIT CASINO

Using the Bonus Buy Feature when Playing with Bonus

Having mentioned some of our favorite casinos at Slotsoo, we should also take some time to explain how bonus buy slots interact with casino bonuses. As we described near the top of this page, casinos will offer distinct bonuses and promotions to welcome players to a casino, and sometimes impose wagering requirements on them.

Since buy bonuses change the dynamic of the game, some terms & conditions limit how you can use them. Item 8 of the Stupid Casino T&Cs states “It is not allowed to use bonus buy features with an active bonus. In case that bonus buy features are activated the bonus and all winnings with it will be forfeited.”

Winnerz and Rollino seem to have more lax terms, with no specific mention of bonus buys in their T&Cs page. If you’re playing with a welcome bonus, it’s always best to check the terms and conditions before engaging with bonus buy slots.

Final Words about Bonus Buy Slots

In summary, bonus buy slots are a great way to get to the most rewarding rounds of a slot game. The exact bonus varies, as does the price of entry, and this creates differing value propositions. Some give you a small advantage over normal spins, while others are quite expensive.

Only luck can determine if a bonus buy pays off or not. They work best when played sparingly, or for curious players who want to see how a slot’s bonus works without landing the requisite symbols. Always keep that in mind and play them responsibly!