When it comes to playing slots, Return to Player (RTP) is one of the most important factors for players looking to maximize their chances of winning. RTP represents the percentage of wagered money that a slot machine is expected to return to players over time, and higher RTPs generally translate to better returns. In the competitive world of UK online casinos, several sites are known for offering high-paying slots with impressive RTP percentages. Here’s a list of the 6 best new slot sites uk with the highest returns that you should consider for an optimal slot gaming experience.
1. Casumo Casino
Casumo Casino has earned a reputation for offering an impressive range of slots with some of the best RTPs available. The site collaborates with industry-leading software providers like NetEnt, Play’n GO, and Microgaming, all known for creating high-quality slots with generous payout rates.
- High RTP Slots: Casumo offers slots with RTPs typically ranging from 96% to 98%. Games like Starburst, Gonzo’s Quest, and Book of Dead provide solid returns.
- Progressive Jackpots: Casumo hosts several progressive jackpot slots, including Mega Moolah, which has offered record-breaking payouts.
- Bonuses: Casumo offers competitive welcome bonuses, including free spins on selected slots, to increase your chances of winning.
With its diverse selection of high-RTP slots and user-friendly platform, Casumo is a top choice for UK players looking for great returns.
2. Betway Casino
Betway Casino is one of the top names in UK online gambling and is known for offering a large selection of high-return slots. The site features games from renowned developers like Microgaming, NetEnt, and Pragmatic Play, which consistently deliver high-quality, high-paying slots.
- High RTP Slots: Many slots on Betway have RTPs over 96%, with some games offering RTPs of 97% and higher. Popular games like Thunderstruck II and Mega Moolah have some of the highest payout rates.
- Progressive Jackpots: Betway is home to several progressive jackpot slots like Mega Moolah and Major Millions, offering massive prize pools that grow with every wager.
- Bonuses: Betway’s welcome package includes free spins, allowing players to enjoy high RTP slots with extra chances to win.
With its strong RTP offerings, progressive jackpots, and excellent customer service, Betway is a standout choice for players who want high returns.
3. 888 Casino
888 Casino is one of the most established names in the UK gambling industry and offers a wide range of slots with high RTPs. The casino’s selection includes games from top providers like NetEnt, Red Tiger, and Play’n GO, ensuring a high-quality gaming experience.
- High RTP Slots: Many of 888 Casino’s slots offer RTPs of 96% or higher, with some games even reaching 98%. Notable slots include Rainbow Riches, Gonzo’s Quest, and Jack and the Beanstalk.
- Progressive Jackpots: 888 offers several progressive jackpot slots, such as Mega Fortune and Arabian Nights, known for their massive payouts.
- Bonuses: 888 Casino offers a generous welcome bonus package, including free spins, and frequently runs promotions to keep players engaged.
With its high RTP slots, exciting progressive jackpots, and reliable payouts, 888 Casino is an excellent choice for players looking for solid returns.
4. LeoVegas Casino
LeoVegas Casino is a popular choice for UK players, particularly for those who enjoy playing slots on mobile devices. LeoVegas offers an impressive selection of high-paying slots from top-tier software providers such as Microgaming, NetEnt, and Play’n GO.
- High RTP Slots: LeoVegas features many slots with RTPs above 96%, with several games offering even higher percentages. Titles like Starburst, Book of Dead, and Vikings Go Berzerk offer great return rates.
- Progressive Jackpots: The casino offers a range of progressive jackpot slots, including Mega Fortune and Mega Moolah, both known for delivering life-changing payouts.
- Bonuses: LeoVegas’ welcome package includes free spins on high RTP slots, giving new players a great opportunity to maximize their returns.
With its mobile-friendly design and impressive selection of high RTP slots, LeoVegas offers a fantastic experience for players seeking good returns.
5. Mr Green Casino
Mr Green Casino is a well-established UK casino known for its wide variety of high-paying slots. The site features games from top developers like NetEnt, Microgaming, and Play’n GO, ensuring a premium gaming experience with high RTP rates.
- High RTP Slots: Mr Green offers many slots with RTPs ranging from 96% to 98%, including popular titles like Gonzo’s Quest, Dead or Alive, and Mega Moolah.
- Progressive Jackpots: The casino has an excellent selection of progressive jackpot slots, including Hall of Gods and Mega Moolah, which offer massive payout potential.
- Bonuses: Mr Green offers a solid welcome bonus with free spins, plus ongoing promotions and a VIP program for loyal players.
With its focus on fair play and a wide selection of high RTP slots, Mr Green is an excellent choice for those seeking strong returns.
6. Unibet Casino
Unibet Casino is another top contender offering a fantastic selection of high-paying slots to UK players. The casino works with leading software developers like NetEnt, Microgaming, and Pragmatic Play, ensuring a high-quality gaming experience with plenty of opportunities to win big.
- High RTP Slots: Unibet features slots with RTPs of 96% and above, with several slots offering even higher rates. Titles like Book of Dead and Vikings Go Wild offer great returns.
- Progressive Jackpots: Unibet hosts popular progressive jackpot games such as Mega Fortune and Hall of Gods, providing players with a chance to win life-changing sums of money.
- Bonuses: Unibet offers a generous welcome bonus with free spins, as well as regular promotions for both new and existing players.
With its strong selection of high RTP slots and progressive jackpots, Unibet provides a solid platform for players looking to maximize their returns.
Conclusion
For UK players seeking slots with the highest returns in 2025, Casumo, Betway, 888 Casino, LeoVegas, Mr Green, and Unibet are excellent choices. These casinos offer a wide variety of high RTP slots, from classic favorites to innovative new titles, along with exciting progressive jackpots and generous bonuses. Whether you’re a new player or a seasoned slot enthusiast, these platforms provide a great combination of fairness, exciting gameplay, and the potential for significant returns.
