Best Online Slots with High RTP

⭐ Highest RTP Slots in May 2025

Check out our latest compilation of the best slots with high RTP, that are available in the US online casinos.

There are thousands of online slots. Therefore, finding the online casinos in the US.

Here are the best online slots with the highest RTP in May 2025.

1. Blood Suckers: RTP 98%

One of the best slots on the market, Blood Suckers is the highest payout online slot in the US, making it one of the most popular games on the list of free slots win real money no deposit required. It’s also among the highest-paying slots in the world with an RTP of 98%.

The vampire-themed game features two bonus games, bonus spins rounds, and the Vampire Slaying Bonus game, which can get you the maximum payout of 1,000x your stake. Compared to other high RTP slots, Blood Suckers is a low volatility slot. This NetEnt slot is available at most legal online casinos, like Caesars Palace Online Casino.

2. Starmania: RTP 97.87%

Starmania is one of the most exciting and highest-paying slots for many online slot players. The NextGen Gaming hit features a 97.87% RTP and is a medium volatility slot, meaning that you get paid reasonably often. In addition, the stars-themed game contains a Free Stars Feature, a Free Games Feature, and a Gamble Feature. To top things off, Starmania is a 3D video slot with easy gameplay and stunning graphics. It is the real money slot to enjoy when it comes to real money casino games in the US.

New and existing s can try it out at the FanDuel Casino in NJ, PA, MI and WV.

3. White Rabbit Megaways: RTP 97.72%

White Rabbit Megaways by Big Time Gaming is one of the most popular slots of the type. It has extremely high volatility, five extending reels, thousands of ways to win, and a maximum win of 13,000x your stake. With the Megaways function, there are more than 230,000 possible winning combinations in the White Rabbit bonus game, making it one of the most exciting and best-paying slots.

There are also paid feature drops, which means you can buy your way into the bonus rounds if you don’t want to wait for the bonus wilds. White Rabbit Megaways is not as widely available on popular online casinos, but you can find it on BetMGM Casino and Golden Nugget.

4. Jack Hammer 2: RTP 97.07%

Jack Hammer returns in the exciting sequel to the original game with an even higher RTP of 97.07%. This agent-themed game features great graphics and an easy-to-access bonus round, which makes it one of the favorites for slot players. Compared to other online slots with high RTP, Jack Hammer 2 is an online slot with low volatility, meaning that you can get wins more frequently.

Currently, not many online casinos offer this game, however it was recently added to the slots selection of bet365 Casino.

5. Secrets of Atlantis: RTP 97.07%

Secrets of Atlantis slot is one of the few high RTP slot machines that doesn’t feature an actual bonus game or spins bonus features. It has an expanding reels function, which, when triggered, will cover three out of the five reels. Compared to other high RTP slot machine games, this bonus feature is very easy to access and triggers more than 1/20. If you hit the wild symbol (a mermaid in this case), you are guaranteed to win big.

You can play this high RTP slot for real money or try out the demo version for free at the betParx Casino. Make sure to grab our betPARX Casino promo code to claim your welcome bonus funds!

6. Guns N Roses: RTP 96.98%

Guns ‘n’ Roses slot game is the first of these real money slots to feature under a 97% RTP. However, a 96.98% average payout should still satisfy most casino players and classify among the best RTP slot machines. The slot has two bonus round functions and two free spins rounds. The first bonus game lets you pick cash prizes among instruments and earn spins. The second bonus feature lets you spin a wheel that will multiply your stake with a static amount.

The two bonus spins rounds are a bit more exciting. Guns N Roses’ legendary free spins feature gives you from 1 to 2 wilds symbols anywhere on the reels, whereas normal spins give you multipliers for winning. The hit frequency for the bonus spins is quite high, so there’s a good chance of hitting matching symbols.

BetRivers Casino is a great place to try out this online slot. It is one of the best online casinos with instant withdrawal, so you can play high RTP slots and get your winnings very fast.

7. Motörhead: RTP 96.98%

Motörhead is another one of NetEnt’s music-themed, high-RTP slot machines. It’s a standout among the highest payout slot machines because its hit frequency is higher than in any other game. This is balanced by a relatively small max win of 570x. However, with three bonus features, a free spins feature, and a 96.96% RTP, this particular game is one of players’ favorites among high RTP slots.

Players in NJ can play this slot for real money at Stardust Casino, while players from PA, MI, and WV can easily access it from Horseshoe Casino.

8. Reel Rush: RTP 96.96%

Reel Rush is a simple online slot machine with a high payout percentage and huge free spins bonus payout potential. It’s among the best online slots if you want to play high RTP slot games that are colorful and fun. The game pays out more money after each win in the base game and the free spins rounds feature tons of bonus cash. However, compared to most high RTP slots, Reel Rush lacks exciting bonus symbols or other special features often found in the best online slots.

This popular slot machine is available at Borgata Casino in NJ and PA. However, players from other states can also play it at BetMGM Casino.

9. Jimi Hendrix: RTP 96.90%

Some game developers like NetEnt like to go with a theme that works, and musical online slots with high RTP in the market seem to work. Jimi Hendrix features exciting gameplay, several bonus rounds, additional spins, and a 96.9% RTP. Compared to other online slot games, the max win of 400x is quite low, but with a maximum bet, it can be up to between $4,000 and $20,000 depending on the online casino, making this an excellent choice.

Players from all eligible states can play Jimi Hedrix at DraftKings Casino and get a chance to win big.

⭐ Best RTP Slots Explained

Learn more about high RTP slots and what makes them the best casino gaming option.

A slot game’s RTP stands for return to player and is the single most important metric when playing online slots or mobile slots for real money. It marks the average return-to-player for a particular game in the long run, which means that playing high RTP slots is more profitable for casino players (and less profitable for the online casino sites because of the lower house edge). They are also exceptionally important when trying to complete the wagering requirements of your casino bonuses.

BonusFinder Tip

The RTP percentage of an online slot is a long-time average. With a 98% RTP slot, you would win, on average, $98 for every $100 you wager. The average is calculated with thousands of spins, so in reality, your spins could result in a smaller winning average. This is called volatility or variance.

Volatility

Volatility or variance indicates how often and how big an online slot is going to pay out. A high volatility slot pays out rarely, but big, and low volatility slots give out small wins relatively often. Most high RTP slots are also high volatility slots because the high RTP percentage is due to massive wins from bonuses or big jackpots.

This isn’t always the case, as some lower RTP slots have extremely high volatility, which could translate into stretches with few to no wins at all. Because progressive jackpots can’t be calculated accurately, they are usually excluded from best RTP slots lists.

⭐ Highest RTP Online Slots with Free Play

Check out slot machines with the highest RTP in the world and play them for free.

The following high RTP slots are not yet available at online casinos in the US. However, the providers that have manufactured these games are widely recognized in the US, so we can expect these high payout slot options to be available for American consumers in the near future. Nevertheless, with such high payout percentages, we assume that some of them will be excluded from welcome bonus offers.

Some of these free slot machine games without ing or registration you can play for free at our game lobby. You can test your skills and learn different strategies.

Ugga Bugga

Ugga Bugga is the highest payout online slot machine in the world. This PlayTech online slot has 99.07% RTP, meaning that the casino sites’ edge is less than 1%. No other slot machines have an RTP of more than 99%. Even online slots with 98% RTP are rare. With the max bet, you can win up to $50,000, which is 1,000x the $50 max bet.

Mega Joker

Mega Joker, the NetEnt classic, has a 99% RTP as well, rivaling most table games and video poker game options. Because the game has high volatility, it’s not guaranteed to always pay out, but when it does, the max win in Mega Joker is 2,000x your stake with the Supermeter bonus game. However, don’t think you can play Mega Joker with your welcome bonus money. No gambling platforms in their right mind would feature this slot game for exclusive bonuses, especially because the game features a progressive jackpot on top of the high RTP!

BonusFinder Tip

s from every state in the US can play Mega Joker for free at our game lobby.

Book of 99

Book of 99 is another 99% RTP slot game. It’s among the second-highest payout online slot machines in the world. The Book of 99 is never featured in welcome bonus lists, and the 5,000x max win makes it a really risky game for casinos. This Relax Gaming hit is one we don’t think might be available in the US for quite a while.

Ooh Aah Dracula

Ooh Aah Dracula is the third slot with 99% RTP. Theoretically, this Barcrest product could be available in the US, but most online casinos haven’t added it to their catalog yet. The 99% RTP rivals most casino games, which makes Ooh Aah Dracula an exciting prospect when it enters the US market. The game also has superb graphics and a fun theme.

Jackpot 6000

Another game from NetEnt, Jackpot 6000, has a 98.8% RTP. The game is an old school slot with three reels. With max bet, you can trigger the Supermeter bonus game across the top of the screen, which gives you access to big wins.

Jokerizer

Jokerizer is a traditional fruit machine. This Yggdrasil title is not yet available in the US, but it features a high 98% RTP. When Yggdrasil gets its US online casino license, you should keep an eye out for the Jokerizer mode and Mystery Win feature. Hit it, and the slot pays $24,000 with a maximum bet of $20.

BonusFinder Tip

s from every state in the US can test Jokerizer for free at our game lobby.

⭐ Highest RTP Slots – No Deposit Bonuses

If you want to get extra money for playing slots, you should choose an online casino bonus for the best RTP online slots. Compared to the best slots sites in other markets, US casinos allow you to play high RTP slots with your bonus credits. When you claim a no deposit bonus, only bonus funds contribute to your bankroll.

However, if you want to get big wins on the highest RTP slots, you can claim up to $2,500 from the following casinos available in most legal online casino states. Best online casinos that payout USA gamblers give out a welcome offer when you sign up to play slots using our exclusive link.

How to Maximize Bonuses on High RTP Slots

You can incorporate some strategy into your casino gameplay. Although online slots are purely based on luck and RNG, there are some adjustments you can make that will affect your casino experience. Here are some tips to make the most of your bonuses and improve your chances of winning big:

• Pick slots with as high RTP as possible, but ensure they are not excluded from wagering by checking the bonus T&Cs
• Play slots in demo mode first if you’re not familiar with the game
• Combine low wagering bonuses with high RTP slots to cash out fast
• Don’t play progressive jackpot games with your bonus funds unless you’re hoping to hit a dream jackpot

Last updated: 04/15/2025