10 Top Bonus Buy Slots: Online Slots with Feature Buy Options

Playing online slots doesn’t have to be a tedious or time-consuming activity anymore. Players willing to pay a premium can use the bonus buy feature and enter a bonus round paying as high as 400,000x their stake! Online gambling is about the thrills, and bonus buy slots provide a unique opportunity for the brave.

Addressing the players’ demand, software companies introduced the bonus buy slots. Players do not have to spin a thousand times to experience a bonus game but instead pay the average payout of the slots bonus round to trigger it instantly. Aside from the waiting part, bonus buy slots come with higher RTP than their standard versions and better long-term winning chances. Since modern online slots mainly payout massive amounts during their bonus rounds, waiting for the feature to drop randomly felt like an arduous task to most. That doesn’t have to be the case nowadays.

Available under dedicated tabs at the top online and mobile casinos in the USA, bonus buy slots are entertaining, very risky, expensive, and better suited for high rollers. Read this page to discover how bonus buy slots work, the most popular feature buy slots and online casinos with bonus buy games, and details on this casino games category.

Disclaimer: Bonus buy slots can be addictive and lead to compulsive gambling, so play with care. Such games are banned in the UK and most European countries due to their high volatility and cost, as directed by official gambling bodies like the UKGC. USA iGaming local regulatory bodies still permit them at the online casinos listed on this page. Only play at licensed platforms with responsible gambling features.

10 Amazing Bonus Buy Slots

  1. 300 Shields Extreme (Nextgen Gaming)
  2. Rise of the Mountain King (Nextgen Gaming)
  3. Pillars of Asgard (Nextgen Gaming)
  4. Sweet Bonanza (Pragmatic Play)
  5. Starlight Princess (Pragmatic Play)
  6. San Quentin (NoLimit City)
  7. Deadwood (NoLimit City)
  8. Nitropolis 3 (ELK Studios)
  9. Knight Rider (NetEnt)
  10. Scrooge Megaways (iSoftBet)

Only a limited number of game developers with bonus buy slots are featured on legal US online casinos, but players looking for high-risk and fast-paced gaming should not pass them by. The stakes are high in buying bonuses, but the payouts can also be significant.

The following list covers the most played bonus buy slots from different US casino providers, although Pragmatic Play, Relax Gaming, and Big Time Gaming are the significant houses behind such games. Money Train, Gems Bonanza, Big Bass Bonanza, and all Feature Drop Megaways slot games are ranked as feature buy slots. Additional online slots with a bonus buy pass feature made it to our top 10 list, with the most available to play for real money on safe and regulated online casinos in NJ, WV, MI, PA, and CT. Scroll further down for the recommended bonus buy sites for playing online slots.

Check the following parts for the low down on the US bonus buy slots you should be playing and details on their theme, RTP, volatility, cost of feature buy slots and maximum winning combinations.

#1, 300 Shields Extreme

300 Shields Extreme bonus buy slot

NextGen took a leap into bonus buy slots with 300 Shields Shields Extreme. Stakes start at $0.25 up to $12.50 per spin. The game unfolds on five reels and 25 paylines, with 95.299% RTP and high volatility. A wild symbol, scatters, multipliers, and bonus spins are the main bonus features, typical among online slots by the provider. The 300x multiplier cap during the free spin bonus round is nothing ordinary, though. If you cannot wait for the scatters to grant you access, the bonus buy pass is set at 60x your bet.

#2, Rise of the Mountain King

Rise of the Mountain King bonus buy slot

A newer game by the same company, Rise of the Mountain King, can be considered a better pick than 300 Shields Extreme. The RTP is 96.31%, and the variance is equally high. To set the five reels in motion, players must bet $0.30 to $15 across 30 paylines. There are slight differences in the special features, although the wilds, scatters, free spins, and multipliers remain identical. New players can buy their way into the King’s Re-spin feature, where wilds trigger respins and multipliers constantly increase. All that for a 60x the stake, unless you get lucky with the gamble bonus buy feature.

#3, Pillars of Asgard

pillars of Asgard bonus buy slot

Moving from animal and Roman NextGen slots to the North Gods, Pillars of Asgard is a 96.295% RTP and high volatility slot. With six reels and a potentially massive 1,000,000 ways to win, the entry cost of $0.25 to $0.50 per round is nothing major. On top of wilds, scatters, bonus spins, and multipliers, the game reels can expand during the Reel Rise feature along with your winning possibilities. You don’t find slot games with a bonus round with such potential, so instantly triggering it for 80x your bet might be worth the cost. The RTP during the bonus goes up to 96.50%, which means a higher winning potential.

#4, Sweet Bonanza

Sweet Bonanza Sweet Bonanza bonus buy

Pragmatic Play slots are all the rage these days, and it all started with Sweet Bonanza. The massive winning potential of 21,100x the bet and all ways pay mechanic set this slot apart from other slot games. The RTP ranges with a maximum of 96.60% during the free spins bonus round, instantly triggered for 100x your bet. Land eight identical symbols anywhere on the reels for a payout or a minimum of four scatters to enter it for free. The 2x to 100x random multipliers and tumbling reels are additional significant aspects of this slot machine.

#5 Starlight Princess

Starlight Princess Sweet Bonanza bonus buy

Sweet Bonanza’s success didn’t go unnoticed by Pragmatic Play, who persisted with similar online slot games. Gates of Olympus came in next, although the identical Starlight Princess was met with more enthusiasm by players. The all ways pay mechanic is apparent in both, as multipliers that can pay up to 500x the bet. In terms of volatility, things are on the highest end. The RTP stands at an impressive 96.51% or higher when using the bonus buy feature. During the free spins round, which costs 100x the stake to trigger automatically, each random multiplier stacks up to reach extreme levels and a higher win multiplier than the base game. A 5,000x max win is apparent in both these slots, with the only difference being their theme.

#6 San Quentin

San Quentin bonus buy slot

NoLimit City is an up-and-coming game provider which is still to acquire a license to enter the US online casino market. There are many reasons to look forward to their online slots, and San Quentin is among their most popular slots to date. The 243 ways to win system operates across six reels, with the bets beginning at $0.20 up to $32 per round. San Quentin has an average 96.03% RTP and high volatility, which explains the 150,000x maximum possible win. Wilds, scatters, free spins, additional symbols, stacked symbols, expanding reels, mystery symbols, reel modifiers, transforming symbols, and walking wilds are the lineup of bonuses in this high payout slot. Unlike Pragmatic Play bonus buy slots, NoLimit allows for five different bonus buy options, ranging from 60x to 1,000x the stake to unlock them. With 150,000x on the line, you might as well look forward to their games, and most notably San Quentin.

#7 Deadwood

Deadwood bonus buy slot

The most beautifully designed NoLimit slot machine with the same RTP and variance as San Quentin but a less lucrative max win set at 13,950x the stake. Deadwood is the only 576 ways to win a slot to date, with a unique 3/5/5/5/3 gameplay. It is worth a spin, featuring an unlimited multiplier cap, wilds, scatters, bonus spins, additional bonus symbols, turbo mode, nudges, and additional reels. Whether it is worth spending 60x to 1,000x your bet for buying bonuses in Deadwood is your choice, but you should definitely give this slot game a shot.

#8, Nitropolis 3

Nitropolis 3 bonus buy slot

Elk Studios is among the finest online casino providers, although less known in the US. Nitropolis 3 builds upon feedback from the prequels, offering improved stats. A 95% RTP, medium to high volatility, and 50,000x max win unfold on six reels, four to eight rows, and 4,096 paylines. Start playing from $0.20 to $50 per spin, and see the four-legged characters jump around your screen. The avalanche feature, wilds, and scatters are the bonus features you might have heard of before, but Nitropolis 3 incorporates far more unique bonuses. Nitro respins, pay both ways, adjacent pays, symbol upgrades, and transforming wilds are available in the base game. The real action unfolds in the free spins bonus round, which can also be bought with five sub-options. A lot is happening there with the X-iter feature buy slots, only accessible through Elk Studios titles.

#9, Knight Rider

Knight Rider bonus buy slot

A brilliantly designed branded feature buy slot by NetEnt, Knight Rider is a five reels and three rows game with 96.07% RTP. Walking wilds, bonus spins, wilds, and multipliers are the way to the 7,000x max win. Start playing from $0.20 up to $40 per spin, or buy the bonus round for 140x your set stake. At first glance, Knight Rider might appear as a standard online slot, but its bonus round is fascinating. Special symbols add multipliers and bonus spins during the ten free spins, with additional random wilds appearing on the reels. As the bonus round progresses, landing big wins is almost guaranteed, which explains its 140x bonus buy-in.

#10, Scrooge Megaways

Scrooge Megaways bonus buy slot

iSoftBet has constantly produced amazing online slots for the past decade, and the Scrooge Megaways slot stands at the top. The base game RTP is 95.98%, which is much higher when using the bonus buy slots feature. The volatility is set between medium and high levels, with an average 12,000x max win. Like other Megaways slots, Scrooge has six reels and varying rows, with up to 117,649 ways to win per spin. Play from as low as $0.20 to $20, or buy the bonus round for 50x your stake, and experience cascading winds, free spins, hold and spin jackpots, scatters, wilds, and the lock it link feature. Not too shabby, considering the main character’s reputation.

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Online casinos might have appeared late in the US, with their legalization realized in 2018. However, the US iGaming market is one of the few regulated ones which permit bonus buy slots. Although this feature was initially available on legal online casinos in other countries, the regulatory authorities banned them. But players mainly play online slots for the bonus game apparent in each, offering winning combinations that can pay up to 10,000x their bet or higher.

As such, players based in a US state that allows online gambling should not take a slot machine with a bonus buy feature for granted. Instead, use this option (if you can afford it) to pass the boring spin after spin and instantly enter the fun. A deposit bonus can help increase your bankroll to sustain this expensive hobby, so joining one of the listed bonus buy casinos is a good start. Our team vets each online casino in terms of safety, security, banking methods, casino games, casino bonuses, and, of course, their variety of bonus buy slots.

Relax Gaming, Pragmatic Play, Big Time Gaming, and NetEnt are the few online casino game providers of bonus buy slots apparent on legal USA platforms, which you find on any of the recommended sites above.

Remember that when playing online slots with any welcome deposit bonus or a free sign up bonus, you cannot use bonus buys. A slot bonus can only be triggered organically in such cases, and only bonus funds count towards the wagering requirements.

What is the Bonus Buy Feature in Online Slots?

Bonus buy slots provide players with a unique opportunity. Instead of spinning their way to the juicy bonus round, they can instead pay a fee to enter instantly. Expanding reels, additional wilds, free spins, an unlimited win multiplier, and more ways to win big are instantly unlocked when you buy the bonus game.

Depending on the bonus round in question, the cost varies, but it is usually set at 100x the stake. A game with an average bonus round payout of 75x will usually cost slightly above that amount. Players can instantly pay anywhere between 50x to 2,000x their bet to trigger a bonus game, with a higher cost suggesting better payouts.

Generally, the bonus buy slot feature is against the premise of slot machines, which started as penny slot games ideal for killing time between the roulette wheel and the blackjack table. However, as more and more players leaned toward online slots instead of the live casino, software providers had to provide them with riskier ways to play. Bonus buy slots are just that, with stakes in the thousands and potential winnings in the millions.

However, there is more to this category. A slot bonus round usually features additional symbols and winning combinations, which mean higher RTP. The return to the player was traditionally calculated across billions of spins, factoring in the bonus round and regular spins. Now that players can only play the free spins bonus round or other unique bonuses without going through the standard gameplay, they have better long-term returns. But this only applies to players exclusively using the feature buy slots and not spinning normal stakes.

However, the dark side of a bonus buy slot should not be neglected. The excitement and potential rewards of a free spins feature and interactive bonus rounds can be addictive. The cost to trigger a bonus round as a high roller can be $50,000 or more, so caution should be practiced when playing online slots in this manner. Although such practices are shared across slot streamers, casual players should always play responsibly.

Tip: Players looking for bonus buy slots with higher RTP when exclusively played via the bonus buy feature should use the ‘i‘ tab and look for games noted as ‘RTP varies.’

The First Bonus Buy Slot as an Example

While covering the innovative bonus buy feature, we cannot help but mention the company behind this mechanic. Big Time Gaming’s White Rabbit was a breakthrough slot game in more than one way, but the 2017 Megaways slot machine was the first with a ranging RTP and the trademarked Feature Drop special trait.

Players spinning the game’s reels can win tokens, which allows them to trigger the bonus buy round for a lower cost or completely free. In our view, this game diminished the importance of luck in slot machines. Extra Chilli Megaways and Buffalo Rising Megaways are two other feature drop games operating like White Rabbit.

white-rabbit-rtp bonus buy

What Bonus Features Can I Buy on Slots?

Depending on the bonus buy slot machine and its provider, one can buy different bonus rounds. There can be different options within the same slot, with varying buy-ins to trigger the bonus spins or the pick and win feature. To save you from the surprise when attempting to purchase bonus spins or a multiplier feature, we listed some of the standard features buy slots categories:

Several bonus features in the same game with ranging premium: Unlike the initial five reelers, online slots like Game of Thrones feature four or five free spin rounds with varying multipliers, wilds, and winning combination mechanics. To enter the Immortal Romance or the Thunderstruck slots fourth and most rewarding bonus, players must trigger the unique feature over 15 times. In other cases, a free spins round might require scatters or a bonus game special symbols to trigger. Each could come with different winning potentials and therefore varying premiums to trigger. In some games, players could be offered the chance to trigger one of five or six different bonus features. NoLimit slots are the best example of the above, with a varying cost of 1,000x up to 4,000x to trigger.

Gamble bonus buy slots: Extra Chilli Megaways and Gonzos Quest Megaways are part of this category, allowing players to force trigger the bonus round and gamble how many free spins they will receive. The chances of slots winning the maximum amount of 24 free spins through the gamble option lean towards the players, but there is still a good chance of losing the entire bonus buy game. This option is an example of a riskier category of bonus buy slots, which many players enjoy nonetheless. Genie Jackpots Megaways is the only bonus buy game that doesn’t even guarantee a bonus round.

Feature drop tokens: This niche was already discussed above through the description of White Rabbit Megaways, although more BGT games have replicated it since. Players win tokens for playing base game rounds, which can be exchanged for a lower bonus round buy cost or manually triggering it entirely free. Any game with the BGT Gold Coin is classed as a feature drop slot, although playing this way diminishes the main perk of feature buy slots – the higher RTP.

bonus-buy-slots risk

How do Bonus Buy Slots Work?

By understanding the central premise of buy slots, players won’t struggle to use this feature. Since it is the riskiest way to play, providers place it prominently in the games’ interface menu. Using the information box of each game will provide details on the cost and maximum win potential.

  1. The bonus round available in the game can be triggered instantly after paying a multiple of the set stake.
  2. When purchased, a spin will follow that will 100% include enough bonus symbols or scatters to trigger the purchased bonus round.
  3. A click on the screen will initiate the bonus spins or special feature purchased.
  4. In the case of slots with several bonus buy features, players will need to select the one they wish to opt-in for. The price for each will be displayed, along with the addons like bonus spins and increased starting multipliers. Each addon can significantly add to the cost required to opt-in.

The rules and payouts applying to a purchased bonus round are identical to randomly triggered features, except for the parts covered above.

Bonus Buy Cost

Bonus Buy Feature Variations

The cooles thing about feature buy slots is they come with unlimited potential for fun and variation. Players don’t have to spin the reels for hours to see the part of each game. Instead, they can pay a sum, see the action unfold, and then switch to another game and repeat the process. The risk involved in this activity should not be ignored, though.

Depending on the selected bonus game, there are different features one can play. The most common is free spins, but there is a bonus round to satisfy every taste. Let’s see some examples:

  • Free spins – players sit back and watch the reels spin.
  • Wild symbols – aside from mere substitutes, wilds can expand, multiply wins, stick, or move across the reels.
  • Expanding reels – some slot machines uncover additional reels during the bonus round and, therefore, more winning ways.
  • Wheel of fortune – take a spin to determine the bonus round, reward, or add-ons.
  • Multipliers – the fastest way to increase your win multiple is by multiplying with one or more multipliers.
  • Pick and win – an interactive way to select items and uncover rewards.
  • Tumbling reels – also known as cascading or rolling wins, depending on the developer, they remove the winning symbols to provide additional winning chances within the same round.

There is no shortage of bonus rounds and features in online slots, and selecting a great game can mean all the above combined in a single feature.

How much do I have to pay to buy slots bonus rounds?

The amount required to buy a bonus game widely varies. The cost is determined by two main factors: the bet and the average payout of the bonus round. The higher the entry requirement, the better the winning potential. Some online slots provide users with the pre-selected game’s option of adding more free spins, higher multipliers or extra features like wilds and jackpots. Don’t get carried away with these since they can significantly increase the feature drop cost.

The casino game providers with bonus buy slots currently available at legal US casinos are Big Time Gaming, Relax Gaming, NetEnt, and Pragmatic Play. Their games rarely require over 200x the stake for immediate access to the bonus rounds. In contrast, NoLimit slots and Karamba’s Machina Megaways have variable costs due to the several add ons and different bonus round options.

If you join one of our top-rated casino apps, you can use the feature buy to experience cool features combining free spins, multipliers, and more.

Can I use the bonus buy slots feature more than once?

Players can trigger the same bonus round or the other special features as many times as their bankroll allows. Playing an online slot in this way is very risky and expensive, but it comes with higher long-term winning potential.

But please remember that this feature is not allowed when playing with an active $10 casino deposit bonus or no deposit free spins winnings. The bonus buy option can cancel your bonus funds or any extra free spins pending.

Are Bonus Buy Slots Better than Normal Games?

The bonus buy option provides a higher RTP than trying to trigger the bonus feature traditionally. However, it is very complicated to explain why the developers support this argument behind the same games.

That doesn’t change the fact that the random symbol combination required to unlock a free spin round might come as soon as you spin the game’s reels, or never. Unless you use the instant bonus buy button, you cannot be sure of the outcome.

Although the value of these bonus games is higher than classic slots with 92% RTP or more, they do come with an increased risk. Your balance can vanish in an instant when playing online slots using this strategy, which is why we cannot overstate enough the importance of gambling cautiously.

Ultimately, it is essential to remember that neither gambling normally nor buying bonuses guarantees a win.

Bonus Buy Slots Risks

By reading this page, it must have been evident that we are somewhat fascinated with bonus buy slot games and their availability at US licensed casinos. Players in regulated markets could not access these slots for the past few years, so they often resorted to offshore online casinos, which did not provide any security or assurance on whether they would get paid and that their games operate fairly. Most websites on this topic still promote such operators, which is highly unethical.

Another significant risk with bonus buy slot games is spending too much in very little time; with stakes per spin ranging from $0.20 to $500 or more, purchasing a Pragmatic Play bonus feature at the maximum costs $50,000. We’ve seen people losing millions in a matter of hours playing this way, which doesn’t match our idea of fun.

Before opting in for high-stakes gambling, test the games in the free demo mode or use a welcome bonus to set your expectations straight.

gamble bonus buy

Controversies Surrounding Bonus Buy Slots

There are arguments against and in favor of bonus buy slots, although regulating against them is, so far, the most common course. The reports flew in after Big Time Gaming’s White Rabbit became available to new UK customers.

Reasonably, critics claimed that such slots are extremely risky and can lead to compulsive gambling with considerable losses in minutes. Another fair point concerned the multiplier assigned to wins when buying a feature. For example, if you pay $200 to buy a bonus on a $2 stake per spin and win $1,000, does it count as a 500x win or a 5x?

The above arguments set the dice against bonus buy slots, with the UKGC and most European iGaming gambling authorities banning them from online casinos. The games are still available, but the bonus buy option is not.

Offshore online casinos operating in the above countries, Canada, Australia, and other unregulated markets still provide bonus buy slots. However, players should keep away from such online gambling providers for safety and security reasons.

Thankfully, the land of the free legalized online casinos and bonus buy slots are widely accessible by USA players. NoLimit, Karamba, and other providers powering such slots are unavailable, but American players can access games by Pragmatic Play, NetEnt, and Big Time Gaming with this unique bonus feature. With new $500 no deposit bonus codes and real money free spins bonuses, playing these games can be slightly less risky.

Join one of our recommended casinos to play bonus buy slots, using the tips and insights acquired from this page. Please remember not to use the feature with an active welcome bonus and always play responsibly.

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