What is RTP in online slots? Return-to-player explained
FOR most online casinos, online slot games are their bread and butter. The history of slots and casinos is well documented, and the rise of online casinos has ushered in a newer, more creative era for slot games.
With so many slots to choose from, knowing which ones to play can put your head into a spin. One of the most important factors when deciding which slots to play should be the return to player (RTP.) This lets players know how much of their money they can expect to see over a period of time.
In this slot RTP guide, we are going to unpack exactly what that means, give you tips for finding the best RTP slots, and more.
What is RTP?
RTP stands for return to player, and it is one of the most important factors a player should consider when choosing a slot game. The RTP represents the amount of their money staked that a player is likely to see returned to them over a period of time.
How RTP works
A developer calculates the RTP of a slot by simulating millions of spins and recording the results. This gives an idea of the percentage of returns a player can expect to see over an extended period of time. Theoretically, betting £100 on a slot with an RTP of 96.50% over a huge number of spins should see around £96.50 returned to you.
Of course, slots use random number generators (RNG) to determine the outcome of each individual spin, meaning that RTPs are not an exact science, so returns will vary in your individual experience.
What’s the difference between RTP and house edge?
RTP and house edge are two sides of the same coin. In gambling and betting terms they are one of the same. The RTP displays how much money a player is likely to see returned over a period of time, while the house edge displays the amount the house is likely to collect. For example, in a slot where the RTP is 96.5%, the house edge here is 3.5%.
What’s the RTP for different casino games?
The average RTP of a slot game is around 96%. Generally, RTPs will vary between 92-98%, though they can be lower and, very rarely, higher. The RTP of other games will vary depending on their variation, but once there are rough averages. The averages for other popular games are approximate:
As you can see, slot games tend to be slightly lower than most other games. However, some of these games have optimal strategies that can be deployed that increase the RTP, whereas slots do not present this option.
Factors Influencing RTP in slots
Game design and mechanics
The way a slot game is set up and the base game mechanics are big factors when determining the RTP. Mechanics like Megaways, for example, can have a huge impact on the return rate of a game.
Bonus features and paylines
The bonus features and paylines are just as important as the gameplay mechanics when it comes to determining the RTP. Slots with more paylines are likely to provide more chances to win than those with fewer. Bonus features are also great at creating winning opportunities, though the frequency and likelihood of triggering them also play a role.
Volatility and variance
The volatility and variance of a slot will determine the frequency at which players will win, and the size of their potential winnings. More volatile slots are likely to pay out less, which can impact the RTP negatively, while slots with lower volatility may boast higher RTPs.
Progressive jackpots
Progressive jackpots can play a huge role in determining the RTP of a slot game. Progressive jackpot slots will often display an RTP with and without the jackpot factored in. The number with the jackpot factored in is often much higher, but, of course, not everyone will want the jackpot, so the RTP is often much lower without it. For example, a jackpot slot might post an RTP of 96%, but 8% of this is factoring in potential jackpot returns. Given how few people will win the jackpot, the RTP may actually be closer to 88%, which is low. This is very common in jackpot slots.
Software providers
Slot developers have a huge role to play in the RTP of a slot game. Some developers enjoy developing slots with higher return rates, while others are much tighter and like to use harsher maths models. Many of them, including the likes of NetEnt and Pragmatic Play, will also release several different models of each slot with different RTPs.
Dispelling common misconceptions about RTP
There are lots of misconceptions about online slot machines, and one of the biggest surrounding RTP is that it is a guarantee you will win. RTPs provide an estimate of the amount you could see returned over a period of time and should not be confused as a promised amount.
Another huge misconception that is partially created by RTPs is the idea of being due a win and hot and cold slot machines. Each spin of the reels is generated by a random number generator (RNG), which is a unique algorithm that no one can change. You have as much chance of winning on one spin as you did on the last, so don’t be fooled into thinking a win is on the way and continue to chase losses.
How do you find the RTP on a slot machine?
In most cases, a game’s RTP is found in either the paytable or the help page. These pages are often labelled by name or use an icon like a question mark. If you can not find the RTP in either of these places, then we recommend heading to the developer’s website.
Can online casinos change RTP?
No. However, it is important to note that developers can release multiple versions of the same slot. Pragmatic Play, for example, will often release three different versions with different RTPs. With that in mind, always make sure you check the RTP of a game, and if it appears too low, then it might be worth checking it somewhere else.
What is a good RTP for slots?
The industry average sits somewhere around 96%, so anything around this number is considered strong. If you run into a slot with an RTP that is 97% or higher, this would be considered excellent. On the other hand, if you find one that is much lower than 94%, then this might be best avoided.
What slots have the best RTP?
There is no concrete rule on the types of slots that will have high RTPs, with most sitting around 96%. Some slots will exceed this, though. Popular examples include the Blood Suckers and Blood Suckers Megaways titles from NetEnt, both of which have become big hits among players, boasting RTPs of 98% and 97.66%, respectively. Another classic slot with a high RTP is Book of 99 from Relax Gaming which served up an incredible RTP of 99%.
What online casinos have the best slots?
With so many top online casinos in the UK, knowing which ones to choose can be challenging. We’ve compiled this list of three of the best online casinos with high-paying slots for you to consider.
1. Duelz
Duelz Casino is a favourite of ours, and it is one of the best casinos when it comes to slots with high RTPs. The operator provides slots from developers like NetEnt, Pragmatic Play, Relax Gaming, and Nolimit City, all of which boast some highly volatile, high RTP slots packed with unique bonus and innovative gameplay features.
2. Mr Vegas
Mr Vegas is home to a very impressive online slot collection. The operator works with many of the biggest names in the industry and offers plenty of high RTP slots for players to enjoy. You will also find all of your old favourites, including games like:
- Starburst
- Gonzo’s Quest
- And more.
3. Magic Red
Magic Red Casino lives up to its name, serving up plenty of magic with its online slot and casino game offerings. The operator provides many high RTP slots from names like Play’n Go, Hacksaw Gaming, and more. There is also an excellent live casino section powered by Evolution for players looking for high-paying live casino games.
Our top 5 tips for finding the best casino and slots RTP
If you’re new to the slots world, understanding a lot of the jargon used by industry experts can be a little confusing. Here are five simple tips for you to follow to help find the best slot RTPs and casinos that will work for you.
- Understand that RTP is not an exact science: One essential thing is understanding that RTPs are not an exact science. These are based on an infinite number of plays and are theoretical. If you play a slot 100 times, you are not guaranteed to see a return 97 times. As such, do not go into a slot, only expecting to lose a small percentage if you play 100 times.
- Consider how you like to play: Jackpot slots, due to their huge winning potential, will often have much lower RTPs than standard slot games once you factor in the jackpot itself. The iconic Mega Moolah jackpot, for example, posts a very low RTP if the jackpot is removed. While this would be seen as bad in a traditional slot game, there is a lot more grey area with progressive jackpots, as these are all about chasing those big wins. As such, if you are a player who wants to chase big wins, then the base game RTP may not be as important to you. If, however, you are looking to win more regularly, then you will need to factor in it.
- Check out the volatility: Another important factor when looking at online slots is their volatility. While RTP indicates how much you are likely to see returned over a period of time, the volatility gives you an idea of the frequency and the potential size of those wins. Highly volatile slots will have big winning potential, but those wins are going to be far apart and less likely to hit, while lower volatility slots will pay out more often, but you are less likely to land a big win. Like the RTP, information about volatility is often displayed in the paytable or on the help page.
- Get to know the game developers: The more slots you play, the more you are likely to spot patterns from certain developers. Some studios, for example, Nolimit City, will always deliver highly complex games that are extremely volatile, while others, like Pragmatic Play, will stick to tried and tested themes, and their slots will all use similar maths models. You should also take the time to learn about the different gameplay mechanics and payout game systems, with things like Megaways or cluster pays having a huge impact on the way a game is played. As with anything, the more you know, the more informed your choices will be.
- Remember, you are never due a win: One of the most important things you should remember when playing an online slot game is that you are never due a win, regardless of the RTP. And no, slots are not rigged against you. RTPs are determined over an infinite number of games, and, as such, they are not a guarantee that you will win. Never go into a slot game believing you are owed a win, and never chase losses.
Reviews for top UK slots
About the author
Liam Hoofe
Liam is an experienced iGaming and sports betting journalist based in Cardiff. He has worked in the sports betting industry since 2017 and has provided content for some of the biggest casino and betting brands in the UK. He has also covered football and other sports for both regional and national newspapers.
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