Which Online Slots Pay Out the Most?

When playing online slot machines, there’s one thing you want above everything else: to win some serious amounts of money. You might think that each slot machine gives you the same chances of hitting a win, however this is actually incorrect.

On this page, we’re going to be looking at Return to Player (RTP) – a figure that can be applied to every online slot machine. We’ll then take a look at five of the slots out there with the most impressive RTPs.

Which Online Slots Pay Out the Most?

What is Return to Player?

The Return to Player – usually stated simply as RTP – is a percentage that shows exactly how much money, on average, a player should win back from a slot machine. The higher the percentage, the better a player’s chances of winning money are.

Here’s an example. Imagine a slot has an RTP of 95%, which is about average for a slot machine. This would mean that, on average, you’d earn back £95 for every £100 you wager. There’s no guarantee you’ll get these returns though, as someone could scoop a huge jackpot, which would mean that other players would need to lose money, in order to correct the average.

Most good online casinos now publish the RTPs of their slots for everyone to see. If your casino doesn’t, you can easily find the information you need via Google.

Slots with the Top RTPs

Now, let’s take a look at the online slot machines boasting the best RTPs at the moment…

Mega Joker

The slot with the best RTP we can find anywhere online is Mega Joker – a title from the people over at NetEnt. This slot is based on fruit machines of old and has a Supermeter mode, as well as a progressive jackpot. With an RTP of 99.00%, this is a game every slots fan should be searching out as soon as possible.

Cosmic Quest – Mystery Planet

Cosmic Quest – Mystery Planet is a game from Rival and we know that not everyone will have heard of it before. It’s the sequel to the popular Cosmic Quest slot and it has an exciting design, as well as both a bonus game and free spins. You’ll find that it offers an RTP of 98.95%, putting it second on this list.

Jackpot 6000

Another game from NetEnt, Jackpot 6000 is pretty simple, although it does have an enjoyable bonus, called the Supermeter Jackpot feature. There’s also a gamble feature that can be used after every win spun in on the reels. It has an RTP of 98.86% and should be enjoyed by those looking for a slightly simpler slot playing experience.


We know that chess might not be to everyone’s liking, however you have to try this game, as it has an RTP of 98.70%. It comes from a company called MultiSlot, who aren’t one of the big names in the industry, and it has a fun design, as well as really simple gameplay. There are free spins and a bonus to unlock, plus the wild symbols can sometimes be really helpful.

1429 Uncharted Seas

Finally, we come to 1429 Uncharted Seas, which is a slot machine from Thunderkick with an RTP of 98.63%. It’s a slot with a nautical theme and you can activate a free spins feature by getting three or more scatters anywhere on the reels. We think this slot looks great, and when this is combined with the high RTP, it’s clearly a slot everyone should try.

Stephen Addington (PhD, MSc, BSc)

Researcher and expert in applied mathematics covering the areas of combinations, configurations, probabilities and games of chance within slots machines. Consultant to various gaming developers and suppliers. Published author and speaker. You can read more about Stephen on my author profile page