Slots Sign Up Bonuses – Best Slot Promotions in the UK (2025)
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Top Slots Bonuses – September 2025
Deposit £30 Get 80 No Wagering Free Spins on Big Bass Vegas Double Down Deluxe
What Is a Slots Bonus?
Slot bonuses are exactly what they sound like – bonuses designed for slots. Whenever you accept a casino bonus, you’ll usually find there’s some part of it that can be used to play online slots. But, there are some bonuses that are tailored specifically towards slots fans. These are the promotions that we call slots bonuses.
Why Casinos Offer Them
Slots are by far the most popular online casino game, so it makes sense to offer bonuses that you can use on slots. Slots welcome bonuses give the casino a chance to attract new players, by offering them something in return.
Slots bonuses can also encourage you to try out new games, refer your friends, or consider topping up your account with a little more money if you want to claim a slots reload bonus.
Why Players Love Them
While casinos love a slots bonus for its ability to attract and retain players, the reason slots players love bonuses is totally different. Below are just some of the reasons you might want to claim a slot bonus:
- To get a boost to your bankroll
- To play a slot game without spending your own money
- To play slots that you haven’t tried before
- To try out a new casino and see if you like it
How to Claim a Slots Sign Up Bonus
Claiming a slots bonus is simple, and we’re making it even simpler with guides like this. Below you can find our step by step guide to finding and claiming the best bonuses for online slots.
Types of Slots Bonuses Explained
If you’re a fan of slots then you’re in luck, not only are slots bonuses the easiest to come across, you also get the widest variety. Below are some of the best slots bonuses in the UK right now, along with how they work and a casino site where you can claim one.
Slots Welcome Bonus
A slots welcome bonus is any kind of bonus that you claim as a new player and you can use on slots. All of the promotions in our list of the top 20 slots bonuses are slots welcome bonuses. They can be a mixture of free spins and a deposit match bonus, or just one of the two.
Kachingo
Kachingo – Best Slots Welcome Bonus
We like Kachingo’s simple deposit match and free spins medley. Sign up and claim a deposit match up to £188 (to use on whichever games you like) and 88 wager-free spins to use on Fire Joker.
Free Spins
Free spins do what they say on the tin – a set number of free spins to use on a slot game. Some slot sites will give you spins that you can use on a small selection of slots, others will be for one specific slot game.
PricedUp Bet
PricedUp Bet – Bet £30 Get 90 Free Spins on Big Bass Bonanza
At PricedUp Bet, if you sign up as a new customer and bet £30 you get 90 spins completely free. These come with just a 10x wagering requirement on the bonus winnings, so you can clear it quickly.
No Deposit Spins
No deposit bonuses are much harder to come by than other bonuses you can use on slots. They let you claim a few free spins without having to make a deposit. They usually come as a small package and tend to have a higher wagering requirement than deposit slots bonuses.
Space Wins Casino
Space Wins Casino – 5 No Deposit Free Spins on Starburst
At the moment you can sign up to Space Wins Casino and receive 5 spins on Starburst completely free. This does come with a 65x wagering requirement on your spins winnings, but at only 5 spins, it should be easy to clear!
Reload Bonuses
Lots of casinos offer little perks to loyal players in the form of reload bonuses. These bonuses might give you bonus cash, or they might give you free spins in exchange for depositing a set amount of money. This usually has a wagering requirement attached to it.
The Phone Casino
The Phone Casino – Up to 150 Free Spins When You Reload
The Phone Casino has a great ongoing reload bonus where you can claim up to 100 free spins every time you top up your bankroll. If you deposit £20, £40, or £60 you get 50, 100 or 150 free spins.
Slot Tournaments
If you like a bit of friendly competition then slots tournaments might be the type of slots bonus for you. These pit you against other players, sometimes to see who wins the most on a specific slot game, or who wagers the most. The prizes regularly run into the thousands, but you’ve got to be in it to win it.
Slots Temple
Slots Temple – Regular Slots Tournaments
Slots Temple is one of our favourite slots sites, in no small part down to their brilliant tournaments. They are free to enter and are held on all kinds of slots games, so it’s never repetitive or boring.
Popular Online Slot Games with Bonus Offers
Some bonuses are for new players, some slots bonuses are for existing ones, but one thing is for sure, there are some games that come up time and time again. Below are four of the most popular slot games to find in bonuses for slots.
Big Bass Splash
The Big Bass series from Reel Kingdom is one of the most popular slot series in the UK, which is why they are such common releases to find as part of a free spins offer. One example of this is Big Bass Splash in this series, which players will often receive free spins on – including in some of our Fruity Slots exclusive slot bonuses that you can claim.
Where to Find: Big Bass Splash is used as part of welcome offers at Midnite Casino, Fruit Kings Casino and QuinnBet Casino
Big Bass Bonanza
As one of the most recognisable modern slot games of all time, it’s only natural for casinos to use Big Bass Bonanza as part of a bonus. Best known for its iconic free spins games, players can reel in big rewards by landing the fisherman wild who collects all fish cash symbols, creating massive win potential. Casinos use this slot because its familiar gameplay and potential for big payouts make it a great way to attract new players.
Where to Find: Big Bass Bonanza is used as part of welcome offers at Kachingo, Magic Red, and PricedUp Bet
Rise Of Olympus
Play’n GO’s epic mythological slot, Rise of Olympus, is frequently included in ongoing promotions. Its defining feature, the Wrath of Olympus bonus can award players multipliers of up to 100x, making it a great slot to entice players as part of a bonus.
Where to Find: Casiku Casino’s, ongoing promotion, Turbo Spins Tuesday
The Dog House
Pragmatic Play’s charming, animal-themed slot, The Dog House, is a regular fixture in ongoing promotions. Its standout feature is the free spins round, where wilds become sticky and locked, offering high volatility and the chance for substantial wins.
Where to Find: BetMGM’s ongoing promotion Spin & Win
Ancient Tumble
Relax Gaming’s cascading reels series can frequently be found included in slot tournaments. Its core mechanic, the tumble feature combined with increasing multipliers, offers high volatility and the potential for substantial cascading wins. This makes it easier for players to get significant gains and climb to the top of the leaderboard.
Where to Find: As part of slots tournaments at Slots Temple
How We Choose the Best Slot Bonuses
We have a seriously stringent criteria when it comes to the best slot sites. We’ve discussed all about this on our page about the Fruity Meter. Here you can find out what it takes to be recommended on our site (including a UKGC licence, game library, bonus terms, and more).
When it comes to slot bonuses, as well as fulfilling all of the criteria for casinos, we go a bit further. Below are the additional requirements that we like all of the bonuses we recommend to meet.
- Fair Terms: We look into the bonus terms of every single one of the slot offers that we recommend. From wagering requirements to expiry dates and win caps, we leave no stone unturned.
- Great Games: If a free spins bonus is for specific slot games then we make sure those games are worth playing! Ideally we look for slots with a good RTP, a decent bonus round and a solid max win.
- Mobile Compatible: Most of us play on our mobiles now, so it only makes sense to claim a bonus if you can use it on mobile. All of the slots offers on this page are fine to use on both mobile and desktop.
Slot Bonus Terms to Watch Out For
We can safely say that all of the bonuses on this page have been vetted by our team. But, if you’re looking for your own slots offers then it’s a good idea to pay very close attention to the bonus T&Cs. Below are some of the most important slots bonus terms to look out for:
- Wagering requirements: This is a big one. On slots offers it’s generally applied to the free spins winnings rather than the bonus amount. You have to complete this before you can withdraw your winnings.
- Expiry times: Free spins tend to have shorter expiry times, often just 24-48 hours. If you’re claiming a slots deposit bonus then it should be longer, often 30 days.
- Game restrictions: If you’re claiming a free spins bonus then it’ll usually be restricted to just one game, or a very small group of games.
- Max win limits: Most bonuses come with a max win limit. Check that this makes sense for the size of the bonus – a £50 cap on a £200 bonus is unfair, but a £50 cap on 5 no deposit bonus spins makes much more sense.
- Max bet rules: Lots of bonuses come with max bet rules. Sometimes these are applied to the value per free spin (most often £0.10 to £0.20). Other times they’re applied to the maximum you can bet on any game while the bonus is active (most often £2 to £5).
Always remember to read the terms and conditions before accepting any offer, and to always gamble responsibly.
Slots Bonuses FAQs: Your Top Questions Answered
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What makes FruitySlots’ slot bonus offers more trustworthy than other UK sites?
At FruitySlots, we’re not just listing slots bonuses as we’ve actually played at these casinos ourselves. As the UK’s largest slot streaming community with thousands of gameplay videos on YouTube, we know what to look for in a great slot welcome bonus. Our recommendations are based on real experience and we regularly update our listings to reflect the latest slot bonus promotions available to UK players. -
How does FruitySlots select the best slot bonus promotions for 2025?
Our team carefully reviews each offer based on fairness, value, and transparency. We look beyond flashy numbers to evaluate wagering requirements, eligible games, and payout terms. All our slot promotions for UK players are manually checked and verified, and we never promote bonuses from unlicensed or untrustworthy sites. Plus, many of our listings include exclusive online slot bonus deals you won’t find anywhere else. -
How can I claim a slots bonus?
Claiming a slots bonus is easy – just choose the casino you would like to join from our list above and sign up. Your bonus will be automatically credited to your account after you meet the requirements. -
Can I withdraw bonus money immediately?
Bonus money cannot be withdrawn. However, once you have completed any spend requirements (or if you didn’t have these to begin with) your bonus funds will move into your cash balance, which can be withdrawn at any time. -
What games can I play with a slots bonus?
You can only use your free spins on eligible games, however once you are wagering or using bonus money you can usually play almost every game. -
What is the best UK slot welcome bonus you have running?
We have a variety of slot welcome offers that will suit different kinds of players. One stand out bonus we have is our exclusive offer with Midnite, where Fruity Slots players can claim 100 free spins on Big Bass Splash. -
Is an online slots bonus worth it?
Due to the regulations around bonuses in the UK – including the fact that they must be non-sticky – claiming any kind of bonus is always worthwhile, and this includes a slots bonus. -
Can loyal players get bigger slots bonuses?
Very few casinos in the UK now offer what was known in the past as loyalty rewards, however by continuing to play at a slot casino you can unlock additional rewards and bonuses. -
What is a slots bonus code?
Some casinos require players to input a specific code when they sign up or deposit in order to claim the slots bonus. This is quite rare, and when you join a casino like this through Fruity Slots the code is usually filled in for you, but it’s good to be cautious and always check this, as it can be tricky to add it after.