The Best High RTP Slots For UK Players in 2025
What Is RTP and Why does it matter?
RTP at its core, is the expected amount a slot will return over time in relation to the money wagered. To put it simply, a slot boasting a 97% RTP theoretically pays back £97 for every £100 wagered. Essentially, it’s the percentage of wagers likely to be returned. Games with higher RTPs tend to give players better chances of getting the best payout from casinos.
It’s easy to assume that a high RTP guarantees quick wins within the first few spins or serves as a reliable way to make fast money. However, RTP is not designed to predict short-term winnings. It’s important to remember that RTP is calculated over millions of spins, not just the first few hundred or even thousand. This highlights the unpredictable nature of slots, where anything can happen in the short term.
The actual RTP is determined over millions of spins by a sophisticated system known as a Random Number Generator (RNG). This RNG establishes the average slot RTP based on the collective sessions of numerous players across all online casinos offering that particular game.
RTP also accounts for maximum wins, meaning that while a game with an RTP of 99% suggests an average return of £99 for every £100 wagered, larger wins contribute to this percentage over a significant number of plays, rather than reflecting a one-to-one correlation for each individual wager.
Consequently, during a short playing session, even encompassing hundreds or thousands of spins, results can vary significantly. Players may experience substantial wins, modest losses, or outcomes close to their initial stake in a particular slot. This inherent volatility and feeling of the unknown contribute to the excitement of slots, even in high RTP ones. A game that consistently returned a fixed amount, such as £95 for every £100 wagered, would offer minimal entertainment value.
While some players go specifically for high RTP slots, its relevance to short-term gameplay is often debated. Providers use massive simulations to determine the stated RTP, but most players’ sessions are nowhere near that scale. As a result, RTP is better seen as a long-term performance indicator rather than something that directly impacts short-term play. If you’re after a quick gaming session with frequent wins, volatility might matter more than RTP. Picking games with the right volatility can help you find something that suits your preferred payout structure.
Top New High RTP Slots
If you’re a player seeking the best new slots with the highest odds of winning, you’re in the right place. We review the latest slot releases and have handpicked those with the top RTPs, ensuring you get excellent payout potential without sacrificing gameplay or quality.
Book Of 99
Relax Gaming raises the stakes with its standout title in the Book Of genre, boasting an incredible 99% RTP which is pretty much as high as you can get. This Greek mythology-themed game combines timeless mechanics with innovative twists, making it a top choice for both casual players and wagering enthusiasts. The slot features a 5×3 grid with 10 paylines, offering payouts up to 500x for top symbols. Its collection feature adds a strategic layer, where gathering 99 wilds triggers free spins, alongside traditional scatter-triggered bonuses. Visually, Book of 99 delivers an impressive design inspired by Ancient Greece, with symbols of heroes, villains, and mythological creatures. With its generous math model and engaging features, this high-volatility slot offers win potential up to 5,000x. Whether you’re a fan of the genre or seeking big returns, Book of 99 is a must-try.
Blood Suckers Megaways
Red Tiger revives a classic with Blood Suckers Megaways, a fresh take on NetEnt’s iconic Halloween Slots-themed series. Featuring the popular Megaways mechanic, this slot offers up to 117,649 ways to win, with an impressive 97.66% RTP and a max win potential of 20,521x. The base game includes cascading wins and random modifiers like Wilds, Super Wilds, and win multipliers, keeping the action engaging. Trigger the Free Spins round with three or more scatters to unlock the Picker Feature, where you can reveal powerful perks such as additional spins, wilds, or multipliers for enhanced gameplay. The atmospheric design and high RTP capture the eerie charm of the original, while the modern mechanics and thrilling features ensure a dynamic experience. Whether you’re nostalgic for the original or eager to explore a Megaways upgrade, Blood Suckers Megaways delivers a compelling blend of old and new with plenty of win potential.
Burgers
Big Time Gaming serves up a sizzling treat with its latest addition to its food family of games. This high-volatility slot offers a flavorful 96.41% RTP and a mouthwatering max win of 101,640x. This 4-reel, 4-row video slot features 256 ways to win, with wins being paid out by matching three to four symbols. The game’s theme centres on delectable burgers, complete with salad toppings and ice, each delivering exciting multipliers. Wild symbols with up to x2 multipliers appear on reels 2-4, while a unique Bonus Reel below introduces Lettuce, Onion, Tomato, and Ice Multipliers to enhance payouts. Free Spins are triggered with 3 or 4 Scatters, awarding 12 or 16 spins, with opportunities to retrigger. With its dynamic features and massive potential, Burgers is a feast for slot enthusiasts, building upon the popularity of food themed titles!
Rio Fantasia
PgSoft brings the vibrant energy of Brazil’s carnival to the slot world. This 3-reel, 3-row video slot offers 5 paylines, medium volatility, a 2000x maximum win and a solid RTP of 96.76%. The game features a variety of carnival-themed symbols, with Wilds that substitute for all symbols and offer up to 100x payouts. The unique Respin Until Win feature adds excitement by filling the middle reel with stacked Wilds, and the resulting win is multiplied by a random multiplier between x5 and x20. With its festival theme, engaging features, and mobile-friendly design, Rio Fantasia delivers a fun and rewarding experience for players looking for a carnival adventure.
RTP Levels and Disclosure
The RTP of slots varies from game to game, and RTP is generally classified as low, medium or high. Below we’ve broken down these three distinct groups:
Low RTP (88%-93%): These games often incorporate a significant jackpot bonus feature. This includes both fixed and progressive jackpots, like titles in Blueprint Gaming’s Jackpot King series.
Average RTP (94%-96%): These games offer a more moderate return profile. Elk Studio’s games by and large feature an RTP of 94%, mixing average RTP with high-volatility.
High RTP (97%-99%): These games theoretically provide the highest return to players. 1429 Uncharted Seas by Thunderkick, is a prominent example, boasting an RTP of 98.6%. All online casinos in the UK are required to disclose the RTP of their slot games, but the level of transparency can vary. Some casinos display RTP prominently in the game preview, while others are harder to find, situated in the game rules or paytable. If RTP is a key factor in choosing which slots to play, it’s worth noting where your casino provides this information. Being aware of this can help you make smarter choices when picking a game. If you’re looking for the best online slot sites in the UK for 2025, explore our comprehensive guide.
Top-Rated High RTPs For Slot Games
Starmania
With a standout RTP of 97.87%, the Light & Wonder partner studio NextGen delivers a slot that promises consistent rewards potential, far surpassing the industry average of 96%. This 5-reel, 3-row slot features 10 fixed paylines and offers low-to-medium volatility, making it a low-risk option ideal for players seeking frequent, smaller wins. Features include the free spins round which adds extra Wild symbols to the reels, enhancing your chances of hitting rewarding combinations. While it boasts a low maximum win of 500x, it is easier to achieve by landing five Red Star symbols on a payline. While its gameplay mechanics are simple and dated, Starmania’s high RTP and steady payout frequency make it an appealing choice for casual players looking for fast-paced action.
Money Cart 2
Relax Gaming brings the excitement of the Money Train series back to UK players, offering a refined experience tailored for markets without Bonus Buy options. With an impressive RTP of 98.00% and a maximum win potential of 5,000x, it’s a high-volatility slot that delivers fast-paced action. The game retains the gritty, Western-themed visuals of Money Train 2, focusing entirely on its Respin feature. Players trigger the respins by landing three coin symbols, with persistent symbols like Collectors, Snipers, and Payers enhancing wins. Expanding reels and thrilling character abilities keep the gameplay engaging. Though the potential is scaled back compared to Money Train 2, Money Cart 2’s quick access to the bonus round ensures consistent excitement. It’s a stellar adaptation, making high-stakes gameplay accessible while staying true to its predecessor’s roots. Perfect for players seeking the chance to hit frequent wins.
Jack Hammer
Developed by NetEnt, Jack Hammer offers a unique comic book experience reminiscent of everyone’s favourite superheroes. With a high RTP of 97%, it provides players with frequent wins. This 5-reel, 25-payline slot features exciting elements like Sticky Wins, Wild substitutions, and Free Spins. The game’s symbols include Jack Hammer, Dr. Wuten, and other themed items like a gangster car and a newspaper. The Sticky Win feature locks winning symbols in place while the other reels spin, and landing three or more Free Spin symbols triggers Free Spins. With its low volatility and generous RTP, Jack Hammer offers a thrilling gameplay experience for all types of players.
Mega Joker
Mega Joker is a classic Vegas-themed 5-payline progressive slot from NetEnt, offering a high RTP of 99% in the Supermeter mode, making it one of the most generous slots in terms of payout potential. Wins in the base game are transferred to the Supermeter, where players can choose to bet higher amounts for the chance to trigger bigger payouts. The slot features a progressive jackpot that grows with each spin, offering players the opportunity to win substantial rewards. With its traditional theme and impressive RTP, Mega Joker combines nostalgia with high winning potential.
How Slot RTP is Calculated and the Factors that Influence It
A slot game’s Return to Player (RTP) isn’t just a random number; it’s carefully calculated and influenced by several key elements. When a software developer designs a new slot, they integrate a random number generator (RNG). This RNG is the heart of the game, ensuring each spin is entirely independent and unpredictable.
Once the game is built, its randomness needs verification. This is where independent slots testing agencies, such as eCOGRA for UK online casinos, play a vital role. These accredited labs subject the game to rigorous testing, using sophisticated software to simulate hundreds of thousands of spins in a short period. The data from these simulations is then meticulously compared against the game’s paytable (the list of winning symbol combinations and their payouts). By analysing this data, the testing agency calculates the game’s RTP percentage, which represents the theoretical amount of every pound wagered that will be returned to players over an extended period.
Several factors influence a slot’s final RTP. Game design, mathematical models, and even regulatory requirements all play a part. Here are some of the key influences:
- Bonus Rounds: Bonus rounds, triggered by specific symbols or combinations, offer additional chances to win through free spins, multipliers, mini-games, or progressive jackpots. These features can lead to substantial payouts and significantly impact the RTP.
- Special Symbols: Symbols like Wilds (which substitute for other symbols) and Scatters (which trigger bonus rounds or free spins) also affect RTP by increasing the likelihood of frequent or higher-paying wins.
- Betting Limits: The minimum and maximum bet amounts available in a slot also influence the RTP calculation. These limits help define the range of possible outcomes and therefore contribute to the overall statistical return.
It’s also important to be aware that some games allow online casino operators to make minor adjustments to the payout odds. While these adjustments have a small effect on the RTP percentage, they do not change the fundamental randomness of each spin. The RNG remains the sole controller of every outcome. This operator adjustability is precisely why regulators mandate that online casinos publish RTP information for each game, ensuring transparency and allowing players to make informed decisions. Understanding these factors is crucial before playing any online slot, as a demo or with real money.
Slots versus Lottery – How does the RTP compare
RTP is applicable to all forms of online and land-based gambling including scratchcards and lottery. Online slots typically offer a much higher Return to Player (RTP) than national lotteries and scratchcards. While slots often boast RTPs of 95% or higher, meaning that for every £100 wagered, £95 is theoretically returned to players over time, national lotteries have significantly lower RTPs.
Based on figures showing £8.3 billion spent on tickets and £4.6 billion awarded in prizes, the National Lottery’s overall RTP is estimated at just 55.42%. This stark difference highlights that the primary appeal of lotteries lies in the allure of infrequent, large jackpot prizes, rather than the statistical likelihood of winning.
Correlation or Causation: The relationship between High RTP and Volatility
RTP, volatility, and variance are interconnected concepts crucial for understanding slot gameplay. While RTP (Return to Player) represents the theoretical percentage of wagered money returned over a vast number of spins, volatility (also referred to as variance) describes the frequency and size of those payouts. A high RTP means a better long-term return, but it doesn’t dictate how often you win. High-volatility slots offer less frequent but larger wins, appealing to players with larger bankrolls and a higher risk tolerance.
Conversely, low-volatility slots provide more frequent but smaller payouts, offering a steadier, less volatile experience. Understanding this relationship allows players to choose slots that match their preferred balance of risk and reward, whether they prefer frequent small wins or the thrill of chasing a larger, less frequent payout.
Pros and Cons of High RTP Slots
High RTP slots can be appealing because they promise better returns over time, but it’s important to understand what that actually means before diving in. While a higher RTP indicates a better theoretical payout, it’s wise to view these numbers with a healthy dose of scepticism.
Pros
- Better Long-Term Returns
- Smaller Casino Edge
- Better Value Per Bet
Cons
- No quick wins with slots
- Smaller Top Prizes
- Longer Waits for Big Wins
- RTP is Only Part of the Story
Casinos with the Highest RTP Slots
Tread Carefully: Varying RTPs in Online Slots
Most slot providers now offer games with multiple RTP options, typically ranging from 96%, 94%, 92%, to 90%, allowing operators to choose the one they want to feature. While the highest RTP is often the most advertised online, it’s important to check the casino site to confirm which RTP version is being used for the game you’re playing.
There is a reason for allowing casinos to choose from different RTP settings for the same game. Regulatory requirements set by the UKGC in some regions mandate minimum RTP percentages. A casino’s business strategy also plays a role, with some prioritising higher RTPs to attract players while others focus on maximising profit. Promotional offers can lead to temporary adjustments in RTPs. The target audience of a casino can also influence RTP settings, with high-stakes games sometimes offering higher returns.Therefore it is always best to check what RTP your chosen slot is set at before playing.