Best RTP Slots To Play With Your Next Casino Bonus

Did you know that a slot’s RTP determines its odds? Well you do now. 

In this article we’re going to go over how RTP works and which slots right now provide players with the best odds. 

Let’s get into it.

What Is Return To Player (RTP)?

It is pretty much what it describes. 

When you play a slot, the slot will return so much of a player’s overall stake back to the player.

When averaged over thousands of spins and thousands of players, you get the slot’s RTP. 

RTP is given as a percentage, and this percentage illustrates the portion of everything wagered on the slot that will be returned to players of the slot. 

So, if an RTP is given as 98%, the slot will return 98% of all money wagered on the slot to players of the slot. 
If that sum-total is $1,000,000 – the slot will take $20,000 as profit. The rest will be given back to players in unequal amounts (because some will make a profit, while others will not).

What Are High And Low RTPs?

You can pay most of the slots below using the no deposit bonuses and no deposit free spins found on

We can provide you with the following measurements as rough guidelines: 

  • LOW RTP – Below 94%
  • MEDIUM RTP – Between 94% and 97%
  • HIGH RTP – Above 97%

Top 10 List Of High RTP Slots

Now for the moment you’ve all been waiting for: the top 10 RTP slots in 2023.

10th Place – The Catfather (98.1%)

The Catfather doesn’t commit crimes, he commits “felineys.” 

Yet no matter how cunning and transgressive The Catfather is, the most criminal aspect of this slot is its criminally high RTP. 
At 98.1%, The Catfather may only come in at 10th place – but I wouldn’t discount the slot quite yet. By combining it with a low volatility, Pragmatic Play have created the purrfect slot game for casino bonuses.

9th Place – Marching Legions (98.12%)

Marching Legions is a beautifully designed slot game by Relax Gaming. Based on a Roman theme, the slot features artwork reminiscent of mobile strategy games.

One way to describe the slot is action-packed. Alongside its high RTP (which, at its maximum, is 98.12%) the slot also has a high volatility (243 paylines). The slot is also laden with exciting bonus features.

8th Place – Dr Jekyll Goes Wild (98.2%)

Like with many of the slots on this list, Dr Jekyll Goes Wild has a variable RTP. What does this mean? Basically, you can only max out the RTP when you max out the bet value. 

Unfortunately, then, it’s not the best slot game unless you’re a high roller. However, if you are, you will be richly rewarded by a slot game with exceptional graphics and interesting bonus features.

7th Place – 1429 Uncharted Seas (98.6%)

Want to win free spins with your free spins? 1429 Uncharted Seas may be the slot for you. With its free spins bonus round you can win up to 50 free spins – and that’s on top of an RTP of 98.6%!

1429 Uncharted Seas is a generous slot game. Its artwork is masterful, its bonus features are engaging and it plays on its rich theme with style.

6th Place – Jackpot 6000 (98.86%)

With only 3 reels and 5 paylines, Jackpot 6000 may seem like a bit of a tedious slot. When you then look at the graphics, it looks no more exciting. 

Yet a quick glance at the RTP and your worries will vanish. Jackpot 6000 by NetEnt has a high RTP of 98.86%. 

When the RTP and volatility are combined, Jackpot 6000 becomes an ideal slot game to play with casino bonuses.

5th Place – Ooh Aah Dracula (99%)

Ooh Aah Dracula is a slot game famous for its RTP. It is also the first game on our list to breach the 99% RTP figure. 

With enchanting artwork and 3D graphics, the slot is always fun to play, regardless of the outcome. 

We particularly like the free spins bonus round, with each free spin giving you the chance to turn the reels up to three times to maximize the payout.

4th Place – Book of 99 (99%)

As any experienced player will tell you, there are a lot of ‘book’ slots. Usually, these slots are based on the theme of treasure hunting. Book of 99 is, on the other hand (and absurdly) based on an Ancient Greek theme.

The truth is, we think Book of 99 is simply named after its super high RTP of 99%. The slot lacks coherence, but for whatever it lacks in coherency it makes up for in generosity.

3rd Place – Mega Joker (99%)

Mega Joker is a hugely popular slot created by world-leading games developer, NetEnt. While one major part of Mega Joker’s draw is its high RTP of 99%, it also features a progressive jackpot! 

This is a rare combination and we love it. 

The slot is otherwise really simple. It follows a straightforward layout with 5 paylines and 3 reels.

2nd Place – Ugga Bugga (99.07%)


Ugga Bugga is a remarkably simple slot – Playtech haven’t even given it bonus features! 

Often, the simple slots are the best, especially if it means you are more likely to win. 

Playtech have done away with bonus features and concentrated on making a high RTP slot game (the RTP is a massive 99.07%!), with a low volatility and exceptional graphics. 

To make the slot even more unique, PLaytech have also introduced a ‘Held’ reels feature that lets you hold one of the reels every time you spin.

1st Place – Goblins Cave (99.32%)

Goblins Cave brings together players who love the fantasy genre and players who want to play pragmatically. 

The RTP is the highest available right now, at a whopping 99.32%. That’s pretty insane.

The only drawback of the slot is that to get an RTP of 99.32%, you have to play with the maximum bet. 

Doing so can lead to your bankroll being quickly exhausted, and the lowest RTP (for players with a smaller budget) can be particularly low, at 94.5%.

In Summary

The RTP is not the “be all and end all” of a slot game.

There is a balance to finding the ideal slot game to play, and it includes factoring in the likes of: 

  • The themes you’re interested in
  • The volatility of the slot (especially if you’re playing with a casino bonus)
  • The bonus features 
  • Your own bankroll (especially if the RTP is variable and can be ‘maxed out’ by betting more), and 
  • How much the jackpot allows you to win. 

When playing with casino bonuses, you are usually restricted to playing one or several slot games. High RTP slot games sometimes also have a lower game contribution, meaning they are not ideal to play. 
If you are going to claim a casino bonus to play slot games, make sure to carefully read the T&Cs and make a balanced decision.


Either by reading our list, reading slot reviews, or by carrying out your own research.

The RTP of most slot games is made public. Thus you can enter its name alongside the letters RTP and you should be provided with a result.

This result can usually be verified by going to the website of the slot’s designer.

Yes, though it is a small difference. To really benefit from a slot’s RTP you have to be playing for a long time.

It depends. The majority of casino bonuses let you play slots.

You have to decide whether or not you want a deposit bonus, or a no deposit bonus:

  • Deposit Bonus – After making a qualifying deposit you get free spins and / or bonus credits.
  • No Deposit Bonus – This is a free bonus you get when you sign up. No deposit is required and you’ll get either free spins or bonus credits.

Not always. RTP establishes your chances of winning, rather than how much you win.

Progressive jackpot slots, for instance, can release jackpots in the tens of millions of dollars, but because they are rarely triggered the RTP is relatively low.

We recommend you only play slots you enjoy. Though slots with an RTP of below 94% are not very fair and you may get frustrated by a lack of regular wins.

Only if it is an in-built mechanic of the game. For example, in our list there are a number of slots with a changeable RTP depending on the value of your bet.

Other than that, neither you nor the casino can change the slot’s RTP. The RTP is pre-determined by the slot provider, which carries out regular tests to ensure it’s accurate.

While all bonuses let you play slots, you are more likely to be able to play high RTP slots with deposit bonuses.

If you claim a deposit bonus, please beware that high odds games, including blackjack, roulette and high RTP slot games, may have a lower game weighting percentage.

Published on: 2023/01/13

About the Author

Hi, I'm Ian, the Chief Editor at NoDeposit.Guide - With hundreds of reviews and thousands of no deposit bonuses, NoDeposit.Guide is certainly your one-stop destination for free online gambling. Our bonuses are updated daily and we pride ourselves on providing the highest percentage of working bonus, worldwide.