Bonus Buy and Bonus Bet Online Slots

Bonus Buy Slots is a category for online slots that have a Buy Feature option. Every online slot here has a demo. Simply, you can pay certain amount xBet and enter the Free Spins Rounds, for example. You can also play the Bonus Bet Slots with slightly higher bets per spins but higher chances of winning or getting the in-game bonuses.

Here we will talk about the slots where you can buy a bonus.

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Online Casinos with Bonus Buy Slots

100% up to €/$100 + 100 Free Spins (Code: FIRSTDEP)
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100% up to €1000 55 Exclusive No Deposit Free Spins Upon Registration
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100% up to €100 + 120 bonus spins in Book of Dead
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Does not accept UK players.
€1000 + 175 FS
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100% up to $100 + 150 Free Spins on Gonzos' Quest
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The New Player Welcome Bonuses are only available to players who create an account and make their first deposit at Pelaa. You may only claim one Welcome Offer (Welcome Package or Live Casino Bonus). Once you have claimed one, you will not be eligible for the other.
100% Bonus €300 max 25 FS on Book of Dead (Play'nGO)
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100% up to £25 +25 SPINS ON STARBURST
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When you open new account, you have the option of not receiving the welcome bonus, by clicking ‘later’ at the end of registration process. When you choose the option of receiving the CampeonUK welcome bonus, you are subject to the bonus policy. New depositing players only. Min. deposit: £20. Max. bonus: £25. Offer valid on first deposit. Offer only applies to new players.
up to $/£800 BONUS
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New customers only. Opt-in required. 1st deposit bonus 100% up to £200. 2nd deposit bonus 50% up to £200, 3rd deposit bonus 25% up to £200, 4th deposit bonus 25% up to £200. Min deposit £10. 40x wagering, 30 days to complete wagering, game weighting and game restrictions apply. Max Bet with bonus funds £5. Max withdrawal from bonus funds is £2000. Neteller and Skrill excluded. Eligibility restrictions apply, cash balance can be withdrawn at any time. Full bonus terms.
100% bonus up to £25 20 Bonus Spins on Book of Dead
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*18+. New UK customers only. Opt-in required. 20 Bonus Spins on "Book of Dead" and 100% Deposit Bonus up to £25 on first deposit. Min deposit £10. 30x wagering requirement for Bonus Spins and 30x wagering requirement for Deposit Bonus (game weighting applies). Max £5/spin or £0.50/line or £50/round (live casino). 30 days expiry. T&C's Apply.

What Is a Bonus Buy Feature?

The Bonus Buy feature is an incredible way to gain access to helpful gameplay boosts as quickly as possible. It offers an exchange for the immediate unlocking of bonus features so that you can take advantage of them sooner to gain more money. While most online slots will have you grind for these features by spinning or collecting a set number of Scatter symbols, the Bonus Buy can skip these steps so that you won’t have to. You are stopping the endless spinning for just a small glimmer of the bonus when you can get a 100% chance of activation by paying a large sum.

There are some slot machines that will have the Bonus Buy feature built into the system. Other times, the casino itself will offer this service as part of their range of bonus content. The player will be paying money to the casino itself, either directly or through the slot machine that the casino partially owns through a partnership with the software provider. Players can choose to use this function or not. It’s all up to them whether they believe the cost for higher volatility is worth it or if it’s too steep a price to pay.

Explaining the Bonus Buy Feature

CherryPop Bonus Buy
CherryPop Slot – Bonus Buy Feature on Mobile

When you are playing a slot machine, there are times where the game may not be going in your favour. The online slot may have a few bonus mechanics to get you going to more winnings or big jackpots, but the chances of them activating are starting to run slim.

This is when the Bonus Buy Feature comes in handy. After you pay 50-150 times of your bet, the Bonus Buy feature will activate and essentially trigger the game’s secondary features instantly. This can be anything from granting more free spins to giving you a multiplier to your payouts when you score from this point onward.

Here are the instructions to follow:

  1. Read the rules to see if the game is eligible with the Bonus Buy Feature.
  2. Pay an additional payout of between 50x to 150x your original stake.
  3. Gain instant access to the game’s additional features or special abilities.

It’s as simple as that. The key difficulty with this mechanic is the timing. Activating it too soon with a small bet may not be enough to get yourself a profit. You have to remember that since you are paying a much larger bet, you will need to win accordingly in order to turn this into a profit.

Details to Pay Attention at

Players should always pay attention to the volatility of the slot machine. Volatility is a way of measuring how likely easy it is to score a jackpot-sized win in an online slot machine. If the volatility is high, then this is a high chance. If they are low or medium, the odds will be adjusted accordingly.

Games that have high volatility will be the most advantageous with a Bonus Buy feature, as it means you can rest easy knowing that a big win will be easier to achieve if you decide to use it. Low volatility is a risk to itself. So, it’s best to keep the trigger finger on standby.

When deciding to use this boost, it’s important to compare the pros and cons. It is true that you may burn through your money faster if you activate it, but there is a strong chance you will earn large prizes more than ever. This makes the large investment you have put into it worth it. However, if you don’t trust the volatility or RTP rate, and you don’t earn those large winnings you hope for, it could turn into a monumental loss for you.

You also need to note that this feature is usually not available for the UK players, as the UKGC bans it from their licensed casinos.

Best Casinos and Online Slots with Bonus Buy

Here is a compiled list of some of the best online casinos and relevant slot machines that have the Bonus Buy feature available to you.

  • Casino Calzone. A festival themed casino that is all about pies, food and tons of slot games available. You can have fun with the festival bonuses, with each slice of pie granting more favours to you than the next. Their Holy Calzone service lets you earn mega spins to win more prizes. Use Bonus Buy to get instant access.
  • Dunder. Dunder brings to you the classy and elegant style of a real gambling establishment all straight from your mobile device. You can be giving a hearty and generous welcome package from the moment you register. Sign up to receive awards and use Bonus Buy to get better accessibility.
  • PlayAmo. A popular UK-based casino offers amazing prizes when you first register with them. They have a range of services from tables to sports bookings. This includes the best progressive and Bonus Buy slots.
  • Sloty. Bringing the glitz and glamour from incredible, real-life casinos. This establishment has mobile and desktop services that replicate what it means to be a part of gambling service. Tons of special offers and promotion campaigns are run to help you get the best opportunities around with Bonus Buy at your fingertips for that extra investment.

Other software providers such as Relax Gaming, Pragmatic Play, Quickspin, iSoftBet and many more all utilize the Bonus Buy. Especially with their deluxe or Megaways versions. Bringing together highly volatile slots to grant you better chances of winning whilst making it fair for all players around. Slots such as Aztec Gold: Extra Gold Megaways, Warrior Graveyard, Crystal Prince, Harlequin Carnival,  and Curse of the Werewolf Megaways.


For mobile slots and casinos, it can all be to do with the level of convenience. This is what Bonus Buy is all about – getting rid of all that extra hassle it takes to win by cutting corners. However, there is always a price to pay when taking a shortcut. And thankfully, the shortcut for this is deep. Start with free bonus buy slots and then move to the real ones, if you are responsible enough.

If there wasn’t a steep price to pay then, it would make winning so much easier for everyone. But the true spirit of gambling is the challenge and rush you feel when you don’t know what could happen. Even with Bonus Buy, that feeling is still there. Only this time, there is a bigger stake to claim.