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Highest RTP slots in the US and how much each one gives back
Compare five of the highest RTP slot games at licensed casino apps in October, including how much each returns for every $100 bet.
You may have a firm grasp of what RTP means, but maybe you'd find it easier to compare the highest RTP slots in terms of dollars. Rolling into the last week of October, I've ranked five slots by RTP and what they return per $100 wagered. You'll also see exactly where to play each game. Start by claiming the Caesars Palace Online Casino welcome bonus with the promo code SLINELAUNCH:
Highest RTP slots in October and what each returns per $100
The following online slots have the highest RTP among the games I've scouted out in October. They return anywhere from $97.82 to $99 per $100 wagered on average.
Highest RTP slots and their average return per $100
Online casino | Slot | RTP / Return per $100 | Play now |
BetMGM Casino | Book of 99 | 99% / $99 per $100 | Up to 1,000 bonus spins + "Spin the Wheel" (code SPORTSLINECAS) |
DraftKings Casino | Dr. Jekyll Goes Wild | 98.11% / $98.11 per $100 | Play $5+, get 1,000 Flex Spins (incl. 100 Lightning Link Spins) |
Caesars Palace Online Casino | Codex of Fortune | 98% / $98 per $100 | |
Fanatics Casino | Starmania | 97.86% / $97.86 per $100 | |
Borgata Casino | Soldier of Rome | 97.82% / $97.82 per $100 | Up to $500 in casino credits + up to 1,000 bonus spins (code SPORTSLINEBORG) |
*The Fanatics offer is bet $10+, get 1,000 bonus spins in PA and WV.
1. BetMGM Casino: Features the absolute highest RTP slot
BetMGM is an obvious choice because it features Book of 99, the only slot I've found with 99% RTP at top online casino apps. Developed by Relax Gaming, Book of 99 theoretically returns $99 for every $100 risked. It has medium-to-high volatility and a 5,000x max payout.
This game is best for anyone seeking the best RTP possible at a regulated online casino. The only potential downside I see is if you're burned out on "book of" style slots. Otherwise, you can use the promo code SPORTSLINECAS to start playing Book of 99 at BetMGM Casino today:
2. DraftKings Casino: Big Bet mode leads to bigger long-term returns
The Barcrest-developed Dr. Jekyll Goes Wild is the highest-paying slot I've played at DraftKings in October. It offers 98.11% RTP during Big Bet mode, which requires a $20 minimum bet for five spins with a Dr Jekyll wild trail activated. This game theoretically has low volatility and just a 500x max win, but Big Bet mode makes it feel like you're playing a much more volatile slot.
Dr Jekyll Goes Wild works if you're fine with using higher-betting modes to achieve excellent RTP. A side benefit is playing at DraftKings, which is one of the best payout online casino sites, as it generally has lots of high-payback slots.
The obvious drawback is that you must risk $4 per spin to enjoy 98.11% RTP. If you don't use Big Bet mode, payback drops to 94.2% for wagers under $2 and 96.2% for bets over $2. Get 1,000 Flex Spins at DraftKings Casino when you sign up with this link and wager $5 or more:
3. Caesars Palace Online Casino: High RTP slot with big win potential
Caesars Palace Online Casino features Codex of Fortune, a high RTP NetEnt slot with 98% RTP. This game also offers a large max win at 10,000x the bet, giving you the chance to chase serious wins while taking advantage of impressive payback.
Of course, with big win potential often comes high volatility. Codex of Fortune can be rough on your bankroll at times, meaning you may not feel like you're earning $98 back for every $100 wagered. New players at Caesars get a $10 sign-up bonus and a deposit match up to $1,000 with the promo code SLINELAUNCH:
4. Fanatics Casino: Good for low volatility lovers
Fanatics offers Starmania, which is on the opposite end from Codex of Fortune. This all-ways pays game has a 500x max payout and low volatility, making it good for earning more consistent wins. Our low volatility slot machines guide lists almost a dozen similar titles.
Developed by NextGen Gaming, Starmania isn't for everybody due to its limited win potential. But by theoretically returning $97.86% for every $100 bet, this game should appeal to most seeking high payout percentages. Deposit as little as $5 to get 1,000 bonus spins when you click here and sign up:
5. Borgata Casino: Enjoy higher payback during a special mode
Similar to Dr. Jekyll Goes Wild, Borgata's Soldier of Rome requires a special bet to reach the max 97.82% RTP. In this case, you bet $20 for five spins with expanding wild symbols activated.
Assuming you're fine with special wagers that unlock features and higher RTP, this Light & Wonder game is for you. Appearing on SportsLine's highest RTP slot list, Soldier of Rome may be worth a special bet or two. But I suggest staying away if you don't have the bankroll to handle the $20 cost for five rounds. Use SPORTSLINEBORG to get a deposit match up to $500 and up to 1,000 bonus spins:
What the best RTP slots give back on $100 of spins
Basing slot returns on $100 wagered makes it easier to translate RTP to dollars. However, it's important to keep the following context in mind:
The return is a long-term average: Just because you're playing one of the best RTP slots doesn't mean it will produce immediate winnings. For example, a 98% payback game may be programmed to deliver $98 per $100 risked over millions of spins.
Volatility affects short-term results: A high volatility slot will put you through bigger swings, where winnings may not come anywhere close to reflecting the stated payout figure.
Single sessions may be well above or below the RTP: Don't expect single-session results to be in line with the payout percentage. A session lasting for a few hundred spins isn't a large enough sample size to reflect payback figures.
The highest-return pick for October
Paying back $99 for every $100 wagered, Book of 99 is the standout online slot in October. This game also has a 5,000 max win and medium-to-high volatility, giving it a nice balance across all key stats. Use bonus code SPORTSLINECAS to sign up at BetMGM Casino and play Book of 99 this Halloween week:
Whether you're interested in playing Book of 99 or something else for real money, be sure you're 21+ and in an eligible state (MI, NJ, PA, WV).
If you or anybody you know struggles with problem gambling, please contact trained professionals at 1-800-GAMBLER or another resource.
Written by Jeremy Olson
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