Image of The Highest Return to Player Casino Slot Machines

The rise of the iGaming industry has given slot players more opportunities to spin reels. You no longer have to leave your house to play your favorite games. Numerous online casinos with extensive slot portfolios allow you to try your luck at these games from the comfort of your home. All you have to do is register and decide what titles you’d like to play.

However, choosing between slots can be difficult, especially when so many are available. Various factors assist players in making this decision, but slots’ RTP sits at the top of that list.

If you rely on RTP when picking slots, too, stick around! This article will reveal the top 5 highest RTP casino slot machines you can play online. 

What Is RTP?

RTP is not a new concept, but it’s still confusing to many players. So, before we dive into our highest RTP slots lost, we should establish what RTP is.

RTP is an abbreviation that stands for Return to Player. It’s the amount of money a slot pays back to players over a more extended period, expressed in percentages. For example, if a slot has an RTP of 96%, it’ll pay $96 for every $100 it receives as a wager from players spinning its reels. So, the higher the RTP a slot has, the better it’ll be for your bankroll.

Still, it’s important to note that this percentage isn’t calculated over one or couple of spins but millions of them. That’s why you cannot predict the payout you’ll get from a slot over shorter gambling sessions.

Top 5 Highest RTP Casino Slots List

Now that you’re familiar with the basics of RTP take a look at our top highest RTP list. You’ll find the reviews below:

Ugga Bugga by PlayTech

  • RTP — 99.07%
  • Volatility — Low

Ugga Bugga is PlayTech’s release from 2013. Two aspects immediately drew slot fans to this game — its high RTP and unusual design.

Ugga Bugga’s RTP is 99.07%, the highest RTP percentage you can currently find in an online slot. Besides this benefit, Ugga Bugga also boasts low volatility. It’ll keep rewards coming your way continuously, so it’s the perfect match for players who like long gaming sessions.

As mentioned, high RTP is not Ugga Bugga’s only advantage. This slot features an exciting design. It has 10 rows separated into two groups of 5. Each row has three symbols. The symbols are inspired by the slot’s theme — they’re cartoonish images of percussion instruments, various dishes, straw huts, and so on. To land a win, you have to line up three of the same symbols on a single payline.

Ugga Bugga has two special features. The game allows you to hold onto particular symbols you think are lucky. The symbol you hold will expand to the other box of 5 rows of symbols to increase your chances of winning. You can also make use of Wilds in this game. These symbols can substitute any other on the screen and help you complete paylines.

The biggest prize you can win on Ugga Bugga is worth 1,000x of your stake.

Mega Joker by NetEnt

  • RTP — 99%
  • Volatility — High

Mega Joker is a slot one of industry-leading game providers — NetEnt — released in 2011. It’s a game inspired by retro land-based slot machines from the 60s and 70s with a progressive jackpot prize and an impressive RTP. Mega Joker’s RTP sits at 99%, just behind our top-rated slot.

The game also has high volatility, so it’s no wonder it’s a favorite among high roller players on the online US market.

Mega Joker features a classic 3×3 grid and 5 paylines. Its reels are covered in various fruit symbols reminiscent of the old slot machines. The whole design is made complete with a 1960s-inspired soundtrack. The game functions like any other online slot — you spin the reels with the click of a button and aim to land 3 symbols of the same kind to score a win.

Like in Ugga Bugga, there are also two sections of reels in this game. The upper section functions using your base game winnings. It can bring you much bigger prizes with the help of special symbols like jokers, chests, and bells. For instance, landing a joker or two can trigger the Mystery Prize worth anywhere from 100 to 2000 coins. Nevertheless, the progressive jackpot is only available in the base game.

Catfather by Pragmatic Play

  • RTP — 98.1%
  • Volatility — Low

Catfather is a popular Pragmatic Play slot known for its out-of-the-box theme and great RTP. Released in 2016, it’s slightly younger than the other two slots on our list but not less rewarding or fun. With an RTP of 98.1% and low volatility, this game can help you bag some serious cash, if you’re patient enough.

As you can probably tell from its name, Catfather’s theme is a unique fusion of the Godfather movie and cats. One wouldn’t think so, but the strange combination turned out to be a genius idea. The game won players over as soon as it appeared on the market and hasn’t lost any of its popularity since. It was so successful, in fact, that Pragmatic Play released a sequel shortly after.

Catfather features a 5×3 grid with 9 fixed paylines. The reels are covered in amusing animations of various cat breed dressed as mobsters. However, this game has a few other symbols, including bejeweled letters and cute mice. The aim is to match anywhere from 3 to 5 symbols on a payline.

The special symbols this slot features are Wild and Scatters. Wilds appear randomly on the 2nd, 3ed, and 4th reel and expand to its entirety, boosting your winning chances. Scatters are represented by mice.

If you land 3,4, or 5 mice, they’ll increase your prize up to 20x or grant you free spins. The free spins come in bundles of 10,15, 25, and 50 with multiplies worth 4x your stake.

White Rabbit Megaways by Big Time Gaming

  • RTP — 97.24% to 97.77%
  • Volatility — Medium to High

From one book and movie-inspired slot to another, our fourth-rated slot is White Rabbit Megaways.

This Big Time Gaming slot was released in 2017. It quickly gained traction thanks to its high RTP and multitude of ways to win.

White Rabbit’s RTP varies between 97.24% and 97.77%, depending on the features you use in the game. It offers equally good volatility, ranging from medium to high.

White Rabbit Megaways is one of the Alice-in-the-Wonderland-themed slots the Internet was crazy about for a while. It’s packed with famous novel references, from the trees and mushoorm’s filled forest backdrop to the character-packed reel grid. The game features colorful animations and enchanting soundtrack.

White Rabbit has 5 reels, each covered with 2 to 7 symbols. This arrangement provides players with over 16,000 ways to win.

However, that number fades in comparison to 248,832 ways you can win if the game’s reels expand. For this to happen, you need to trigger White Rabbit’s special free spins feature. Land at least 3 Scatters represented by the White Rabbit symbol and hit as many cupcake symbols during the free spins. Each cupcake will expand the reels by a row. The more rows you earn, the bigger rewards you’ll reap.

Besides these features, the slot has another ace up its sleeve. It allows you to purchase the Drop feature necessary to trigger the above-described bonus game. The feature initially costs 100x your stake, but its price reduces the more times you buy it during one session.

Book of Dead by Play’n GO


  • RTP — 96.21%
  • Volatility — Low

The last on our top 5 list is an adventure game that’s become extremely popular with US slot enthusiasts in recent years.

Book of Dead comes from another well-known developer, and it was released in 2016. Although its RTP — 96.21% — isn’t as high as that of some other slots on this list, it still managed to keep its players interested long-term.

Book of Dead features one of Play’n GG’s recurring characters — Rich Wilde — going on another adventure. This time he’s on the quest to reveal the mysteries behind the Book of Dead in Egypt. In keeping with the theme, the game’s reels are covered in images of various pharaohs and statues of Egyptian deities.

The game has 5 reels, 3 rows, and 10 paylines and includes several special features. You can increase your winning chances using the free spins and Gamble options.

3 Book of Dead Scatters unlock 10 free spins.

Additional Scatters during the free spins round will add extra free spins to your bundle. Scatters can also expand and grant you bigger prizes.

If you like to experience adrenaline rushes, you can use the Gamble feature to wager all your winnings. This option opens a bonus game on top of the base one and requires you to guess the suit or the color of the card it’ll draw. You can double or even quadruple your winnings in this way if you’re lucky.


That’s our top 5 highest RTP casino slot machines list done. Apart from high RTPs, these games boast fantastic graphics, great gameplays, and rewarding features. They’re also very popular, so you shouldn’t struggle to find any online.

Go through the reviews, compare their characteristics, and pick the slot you’d like to start with.

You can’t go wrong!

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About the Author

Author Sadonna Price has been part of the online casino industry for over a decade, watching it develop and expand across the US. She enjoys playing online slots and table games, as well as Texas Hold’em.