Best Slot Bonuses UK | Updated on May 2023

Author: Cosmin Brehoi
Reviewer: Adina Minculescu

We bring you a list of the best slot bonuses available now in the UK. We’ve spent over 100 hours researching and collecting the best!

How do we select our slot bonuses?

Read more
  1. Our starting point is our online casino database, filled with more than 460 UKGC-licenced casinos.
  2. We filter through the sites that provide online slot offers.
  3. We resort to the conclusions of our review and bonus ratings as a base layer of analysis.
  4. We then proceed to examine each slots welcome bonus again, this time comparing it to other similar ones by terms, safety, and the experience we had with it.
  5. That’s when we rank and make specialised selections for our UK users.

Data for this page

It took us 100 hours of work, spanned over 16 days, and 4 teammates to collect the information for this page. 

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Latest UK Slots Bonuses

Megaways Casino


Apple Pay MasterCard Visa Visa Electron
New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Free Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each. Play Responsibly. 18+. †£10 lifetime T&C Apply, 18+
Monopoly Casino


Apple Pay MasterCard Visa Visa Electron
New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit.18+. Free Spins: on MONOPOLY Paradise Mansion. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. T&C Apply, 18+
Planet Sport Bet Casino


Bank Transfer Maestro MasterCard Visa
New customers only. Min Deposit £20. Wager £20 minimum on slots and get 50 free spins on Starburst. Free spins will expire 7 days after issue. x10 wagering on Free spins. Bet The Responsible Way. T&C Apply, 18+
Rainbow Riches Casino
Just added

Rainbow Riches Casino Review



Apple Pay MasterCard Visa Visa Electron
New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit.18+. Free Spins: on Rainbow Riches. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. **£10 lifetime deposit for Daily Free Game. T&C Apply, 18+
MrQ Casino
Code: FISHIN30 Copied !

MrQ Casino Review



MasterCard Pay by phone PayPal Visa
First deposit only. Min deposit & spend £10. Max 30 spins on Fishin Frenzy Megaways at 10p per spin. Spins credited upon spend of £10 T&C Apply, 18+
Buzz Bingo


MasterCard PayPal Paysafecard Visa
The Legal Stuff: New players. Deposit, stake £10 Bingo get £30 bonus (x4 WR) & £10 Club voucher, or dep, stake £10 slots get 200 x 10p Fishin’ Frenzy™ The Big Catch Jackpot King™ spins (x20 WR) & £5 Club slots voucher. OR use cash balance/further deposit & get both. £5 min. withdrawal. T&C Apply, 18+
Code: GAMES100 Copied !

Betfred Review



Maestro MasterCard Visa
New customers only. Register with code GAMES100. Deposit and stake £10 or more, within 7 days, on Slots at Betfred Games to receive 100 Free Spins on selected titles. Free Spins credited within 48 hours. Free Spins are valid for 7 days. E-Wallet & Card restrictions apply. SMS validation may be required T&C Apply, 18+
Virgin Games


MasterCard PayPal Visa
New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. 18+. Free Spins: on Double Bubble. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. ‡ Current Jackpots are across selected games. T&C Apply, 18+
BetUK Casino


Apple Pay Bank Transfer MasterCard PayPal Visa Visa Electron
New players only across two deposits. Rewards have 7 days from registration to opt-in from “My Promotions” page & each with 7 days wagering. Deposit £10, £25 or £50 & wager 35x. Only cash stakes qualify & wagering contributions vary. 5 free spins worth £0.10 to be claimed within Big Bass Splash with each qualifying deposit, 3 day expiry. T&C Apply, 18+
Pink Casino


Bank Transfer MasterCard PayPal Visa Electron Visa MasterCard
New player only. 7 days to claim offer and deposit a min of £10 with a further 7 days to wager 35x. Cash stakes only and wagering contributions vary. Max reward £150. 50 wager-free spins 0.10p each on Big Bass Splash awarded after wagering complete, winnings paid as cash. 3 day expiry. T&C Apply, 18+


Visa MasterCard PayPal Neteller Skrill Moneybookers Solo
New Casino Customers Only. Free Spins on selected Betfair Casino Games. Free Spins valued at 10p T&C Apply, 18+


ecoPayz MasterCard MuchBetter Neteller PayPal Paysafecard
New players only. Maximum £50 bonus. Minimum deposit: £20. Bonus wins are capped at £500. Max bet with active bonus: £2. Wagering requirement 100% match deposit bonus: 30 times sum of deposit + bonus. Winnings from Free Spins are credited as Real Money without wagering requirements. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. Bonus expires after 30 days if wagering requirement has not been met. One bonus allowed per person, address, device, IP T&C Apply, 18+


Bank Transfer Maestro MasterCard PayPal Visa
New customers only. min deposit £20. max non-withdrawable bonus £30. playable on selected games only. 30x wagering required. expires within 30 days. max win £2,000 T&C Apply, 18+
Immortal Wins


Maestro MasterCard Pay by phone PayPal Paysafecard Visa
No deposit offer T&C’s: new players only, no deposit required, valid debit card verification required, £8 max win per 10 spins, max bonus conversion £50, 65x wagering requirement. First deposit offer T&C’s: min deposit £10.00, £8.00 max win per 10 spins, max bonus equal to lifetime deposits (up to £250.00), 65x wagering requirements T&C Apply, 18+


MasterCard Paysafecard Trustly Visa
UK residents only.Deposits made via e-wallets are not valid for this promo.Min deposit £10.Spins are valid only on Starburst and expire in 5 days. 35x wagering applies.Winnings from bonuses are capped at £100 T&C Apply, 18+
Code: 150RS Copied ! Alpha choice

888casino Review



Apple Pay AstroPay Card ecoPayz MasterCard MuchBetter Neosurf
First-deposit only • Claim in 48 hrs • RS (Real Spins) expire in 14 days • Valid for selected games • Wins credited as real money & capped at £20 • Winnings granted once all RS used or once winnings cap reached • Withdrawal restrictions T&C Apply, 18+
PokerStars Casino
Code: FIRST200 Copied !

PokerStars Casino Review


100 NO WAGER FREE SPINS + 100% UP TO £200

MasterCard Visa
New casino players only. Min. deposit £20 with code ‘FIRST200’. Debit card (Visa or Mastercard) only. Selected Slots only, 7 day expiry. Wagering requirements apply, 5 redemption points per £1 to clear bonus. Game contributions vary. Maximum bet £5 per round. T&C Apply, 18+
Jammy Monkey Casino
Casino of the month

Jammy Monkey Casino Review


£10 NO DEPOSIT BONUS + 200% UP TO £200 + 100 FREE SPINS

MasterCard Pay by phone PayPal Paysafecard Visa
New, ID Verified players only. Up to £10 bonus credit. 40x wagering requirement. 7 day expiry. £50 max withdrawal from bonuses without a deposit across all Intouch Games Accounts; mFortune, Mr Spin, Dr Slot, PocketWin, Casino2020, Cashmo, Bonus Boss, Jammy Monkey. 1st deposit: up to 50 (15p) free spins (FS) in Treasure Tomb and an up to 200% deposit match. 2nd deposit: up to 50 (15p) FS in Lion Fortune and an up to 300% deposit match. Max 10 FS issued per day. Max combined bonus credit of £300. Min Deposit £10. 40x wagering requirement. Bonus 1 expires 30 days after registration. Bonus 2 expires 30 days after 1st deposit. 24hr FS Expiry. T&C Apply, 18+


Maestro MasterCard Trustly Visa
New players only. 100% bonus on first deposit up to £50 & 20 Bonus Spins. Bonus spins are credited immediately and are valid for Book of Dead slot only. Min first deposit of £10. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply accepted countries: UK only T&C Apply, 18+
All British Casino

5 EXTRA SPINS + 100% UP TO £100 + 10% CASHBACK

Bank Transfer Boku (Pay By Mobile) MasterCard Paysafecard Visa
Welcome bonus for new players only. Maximum bonus is 100% up to £100. No max cash out. Wagering is 35x bonus. Cashback is cash with no restriction. Cashback applies to deposit where no bonus is included. Maximum bet while playing with a bonus is £5. Max cashout is £100 if never deposited, no max once deposited. Bonus excluded for players depositing with Skrill or Neteller. T&C Apply, 18+

We are your trusted slots bonuses source

We are your trusted slots bonuses source

CasinoAlpha is the home of the best slot bonuses from UKGC licenced casinos. You can compare dozens of picks with us, get expert guidance, and tips on safe play.

Here is the route of our analysis:

Our slots bonus database

We only use the data we have personally collected in previous investigations. 3 team members focus on a usual casino review through the course of 2 full days while using 3 devices.

For all of the reviews, we have a more refined analysis applied to them. In this case, we look for characteristics that make for a satisfactory gambling experience.

The online slot bonuses

The online slot bonuses

We only present you with offers that we have claimed and completed ourselves. Thus, we can attest to the validity of the presented T&Cs, the glitches encountered, and the likelihood of cashing out.


All slots bonus codes found on our site are also assessed in connection with other types of bonuses and contribute to the overall rating we give to online casinos.

Attached terms of use

Attached terms of use

There are two steps when it comes to this feature:

  1. Reading them before signing up, which is something we recommend you do as well.
  2. Confirming that the rules, restrictions and expectations there are met practically when engaged in bonus play.

Only when these two steps are in harmony can we agree to add a casino and its bonus to our curated list.

Accepted slot games specifications

Our main focus falls on 4 elements, which we believe are essential to any UK gambler.

RTP of the game

RTP of the game

Return to Player is a theoretical rate that shows you the average return you’ll have over a long period of time. From that, you can approximate a return over your budget.

We only recommend bonus slots that have an RTP of under 95% when we talk about jackpot games, where the rate is lower by default.

Provider behind the game

What software provider created the game you’re about to play means a lot in the context of safe play.

Established names in the industry are known for the high quality of their products, sustaining a good reputation. Some of them are even solely specialised in this game type, making their product better technically.

A deep dive

Game providers leave a mark on player preferences, so much so that we’ve found trends of UK gamblers who look for specialised places to sign up and play, like Microgaming casinos, iSoftBet online casinos, and NetEnt casinos.

Glitches that might pop up

Glitches that might pop up

When we play through an offer, we also look out for game glitches on that particular casino. In the hopes we don’t find any, we also look for:

  • What happens when a real-money bet is affected by a glitch
  • How fast and useful customer support is in that situation
  • How do you avoid or rapidly fix such issues

Can you play on mobile?

Online mobile UK casinos outright dominate the industry. This includes any kind of bonus slot sessions. Knowing what specifications a good quality site or casino app needs to have, we can give you useful insights.

Best online slot bonus casinos

Rank Casino Number of slot games
#1 Paddy Power Games +700
#2 888casino +1000
#3 NetBet +2000
#4 LeoVegas +500

Grading scale for our top 4

Our main focus is the bonus value and the proportion between it and the money and time invested for that particular bonus. Of course, we take into account how easy and handy it is to complete wagering and cashout, and lastly, the reputation and reliability of the casino operator as a whole.


The casinos we posted above are well-known operators from our best online casinos ranking. Their portfolio is not limited to slots, and the overall customer experience is positive in more ways than just the gambling aspects.

Paddy Power Games slot bonus code

Paddy Power Games slot bonus code

  • Our reviewers gave a perfect 5/5 rating to the games here, slots included, confirming their quality.
  • The offers focused on online slots are either permanent or temporary and are mostly deposit-based, with a fair minimum deposit required.
  • We’ve found top-notch providers in the lobby, like Play’n GO, Big Time Gaming, and Pragmatic Play. Paddy Power Games is also part of our Playtech casino list UK.
  • You can check the current amounts for jackpot slots in real-time in the lobby.

888casino online slot bonus

888casino online slot bonus

  • From the start, 888casino shows double the number of slot games as compared to the industry average.
  • The numerous options and the clean user experience prompted our professionals to give it a 5/5 game rating.
  • The same 5/5 rating was given to its casino bonus range, the majority of which is applicable to slot games.
  • 888casino slots are, in part, created in-house, meaning UK gamblers have access to exclusive games playable here only after they sign up.

NetBet slots with bonuses

NetBet slots with bonuses

  • While the industry averages +500 slot games per site, NetBet has a catalogue 4 times as big, ranging at over 2000.
  • The list of providers sponsoring the slot-lobby has more than 30 entries, allowing for variety
  • We’ve identified and tried both the welcome bonuses and the no deposit bonuses available and gave them an almost perfect rating.
  • UK players can also play Slingo games, a hybrid that combines slot-machine and Bingo elements

LeoVegas slots promotions

LeoVegas slots promotions

  • The options here are provided by over 30 game providers, and most of them are accepted games to wager your slot bonus on.
  • The bonuses we’ve seen may come with no extra wagering attached, which is both rare and convenient
  • We’ve appreciated the time saved by the search bar in finding preferred games.
  • There are 4 majorly popular jackpot games in the lobby.

The best slot bonus UK

Features Details
Operator Paddy Power Games
Bonus £40 + 100 extra spins with no wagering
T&Cs New UK and IRL customers only. Deposits through debit cards only. 40x wagering requirement on bonus, within 7 days, on eligible slot games. Winnings from bonus capped at £500. Spins available upon completion of bonus T&C Apply

Why is this the number 1 UK slots bonus?

  1. The bonus value received is 4 times the amount necessary to deposit, which is also within the industry average.
  2. The number of spins received is high and among the most wanted promotion types.
  3. There is no turnover to complete for the spins, meaning that the amount derived from playing is accessible for withdrawal right away.
  4. The operator is well-known and had an overall good reputation, adding to the legitimacy of the slot bonus.
  5. Our experience had no glitches or issues, and the total rating we gave was 4.6/5.

The next best slot bonuses

Casino Bonus Min Dep Wagering Max cashout Where to play
888casino £88 No Deposit + 200% up to £300 £20 No deposit money: 50x B
First Deposit bonus: 30x B
£100 / £500 Play here
NetBet Up to 500 Bonus Spins £10 40x W N/A Play here
LeoVegas 10 No Deposit Spins with No Wagering + 100% up to £50 + 25 No Wagering spins on Starburst £10 Extra spins: No wagering
First deposit bonus: 35x B
N/A Play here

Key details about deposit bonus slots

  • To activate these bonuses, you will receive a code by SMS to validate your phone number first
  • Despite calling for a double payment than what we’re used to, 888casino has one of the best slots welcome bonuses in an all-round package
  • NetBet and LeoVegas are shortly behind with a well-off presentation
  • All 3 bonuses confront you with average, manageable playthrough requirements
  • Be aware that the spins from NetBet can only be played for 2 days
  • We advise you to play it safe and claim these slots offers using no other method than a debit card on your name

Best no deposit sign-up offers on slots

Casino Bonus Wagering Max Cashout
Betfair 50 Free Spins No Wagering No wagering No limit
777 Casino 77 Free Spins No Deposit 50x W £100
Fruity Casa 50 No Deposit Spins on Book of Dead 35x B £100

Why we selected these no deposit sign-up bonuses

  • Betfair’s no deposit registration offer strongly resembles Paddy Power’s best slots bonus
  • However, Betfair will let you play your spins in Gonzo’s Quest Megaways besides the identical selection of daily jackpot games
  • We singled out 777 casino and Fruity Casa as advantageous sign-up bonuses, too
  • You can play many games and wagering requirements are not that scary
  • Still, we’re not fans of 777 casino’s £10 cap on free spins slots winnings (paid as bonus funds and to be converted into a max £100 after playthrough)

Types of slot bonuses

Online slot sites are versatile in types of offers as well as game variety, theme and settings.


We want your experience to be both safe and gratifying. This is our priority. We firmly believe that such a thing is impossible unless you’re well informed. That is why we want to explain each subtype and present your best option.

Free spins promotions

Slots are naturally linked with free spins with no deposit required. These are basically casino bonus codes that allow rounds in your session without the need for you to make a deposit prior. You may also come across numerous free spins no deposit mobile verification UK offers or add credit card free spins, which requires players to offer a guarantee of their identity to the casino in exchange for the rewards received.

Top casinos with extra spins:

Free spins promotions

  1. Bonus Boss
  2. 777
  3. Jammy Monkey

Why do we recommend these sites?

Primarily because our participation in the bonuses reached our high standards. The bonuses looked and proved to be compliant with the UKGC directives. We gave the sites high ratings; most of their features are way above market averages, and they constantly update their products to keep up with users’ needs.

To get started with this type of offer, 10 free spins and 20 free spins catalogues of offers are a good starting point. They are usually budget-friendly and completing their turnover will not take up too much of your time.

Slots deposit bonus

The best casino bonuses are promotions activated by payment and can be a way of using your gambling bankroll. That depends on the terms imposed and how well you budget and spend your time.

The subtypes are quite numerous, and thus, you can find one that suits you the best. But we have a shortlist prepared for you here.

Top casinos with deposit offers:

Slots deposit bonus

  1. MrQ
  2. Betfred
  3. William Hill

Why are these our top 3 for slot play?

The most attractive feature is the absence of required wagering. Moreover, the games accepted are popular and allow for an interactive experience. We rated the terms and their implications as fair and were able to proceed to cashout without any major issues arising.


Protect your budget by limiting your spending on casino gambling and choosing a minimum deposit casino. It is a type of website that admits users to the entirety of its services for payments of between £3 and £20.

No deposit slot bonuses

In the UK, no deposit casino bonuses are play opportunities activated after a certain step, usually signing up, without the need for prior payment.

Obviously, their features make them sought-after. Let’s see what we recommend in conjunction with online slot play.

Top 3 no payment slot casinos:

No deposit slot bonuses

  1. PocketWin
  2. mFortune
  3. 777

What makes them worthwhile?

Usually, the normal bonus value is not high by any means. After all, that would ultimately be disadvantageous to the casino. However, our top 3 include casinos that go over the usual £3 to £5 range. In addition, we gave them good bonus ratings in our review, meaning our opinion was positive, the terms were fair, and our cashout process was smooth.

In the hopes of allowing UK players to engage in cost-effective gambling, we have compiled a list of slots no deposit with tons of information that can be easily applied when playing,

Cashback on slot promotions

Cashback bonuses are rare options allowing the gambler to receive a fixed percentage of the prior losses in the form of bonus funds. As expected, both the loss and the derived funds are often tied to slot play.

List of cashback slot bonuses UK:

Cashback on slot promotions

  1. All British Casino
  2. Slotty Slots Casino
  3. Hot Streak

Standards for leading bonuses

Even though cashback offers are seldom found, that does not mean that our expectations of high-quality decrease by any means. Thus, we picked casinos that genuinely offer a notable value without imposing an unreasonably high limit on your losses. We also looked at the frequency with which they’re given out, and we made sure the wagering requirement is not too high, a common practice when it comes to these bonuses.

No wagering online slot offers

No wagering bonuses work differently than usual. Once you have played the funds or spins allocated, you don’t need to bet on it anymore. You can proceed to cash out, that is, if you have any derived profit.

List of top no wagering slot casinos:

No wagering online slot offers

  1. Plantin
  2. EnergyCasino
  3. Greenplay

The facts that decide the best

Obviously, the wagering part we look at intently in different cases has no play here. However, we still scan for abusive terms and conditions, the easy-to-follow rules, good gameplay and smoothness with the processes involved, such as deposits, live chat interactions and withdrawals.

Best payout slots with bonus games

Game RTP Best feature Find it here
Ugga Bugga 99.07% Highest RTP of any online slot
Mega Joker 99% Small minimum bet Grosvenor
1429 Uncharted Seas 98.6% Low variance outcomes MrQ

Why these above all else?

The answer is quite simple: the topping RTP ranges of all 3 games are hard to compete with. Of course, a good-rated game needs to have pleasing visuals and sounds. And, it must allow for setting customization and good ranking features. These 3 contain the complete package.

A top-rated slots bonus for UK players is ideally paired with these games or other similar options of this kind.

Popular jackpot slots with bonus options

Popular jackpot slots with bonus options

  1. Absolutely Mad Mega Moolah
  2. Mega Moolah
  3. Arabian Nights
  4. Mega Fortune


These games have had outcomes of millions of GBP when someone hit the jackpot. However, that is rare and playing on them constantly may be disadvantageous long-term since their RTP is under 90%.

We know that such games seem attractive and that thousands of UK gamblers bet on them daily. However, we want you to be informed and know when to limit your play. You need to have a healthy approach to gambling and stick to your budget.


Never exceed your budget. To manage it easily, set your sum and schedule your sessions weekly. Use the available responsible gambling tools whenever you can.

Terms and conditions to consider

Terms and conditions to consider

All bonuses come with a set of rules, part of the Terms & Conditions you agree upon when you first sign up.


T&Cs are the equivalent of a digital contract and you clicking on the “I agree” button is the equivalent of your signature. T&Cs can be changed at the casino’s discretion, but any changes regarding them need to be communicated to you in due time.

Not following the provisions there may result in you losing the slot offer or, even worse, getting your account suspended.

To avoid that, watch out for:

Wagering requirement & contribution

Wagering specifics Data
Average wagering of a bonus 35x – 50x
Average slot contribution 50% 100%
Average wagering timeframe 7 days – 30 days

These are the ranges that are most likely linked to the bonus you’ll eventually choose. If they are different, you need to calibrate your playtime and strategy well.

Unless you complete all the bets to satisfy the wagering requirement, you won’t be allowed to cashout.

Payment needed & cashout limit

Transaction details Data
Average deposit limits £5 – £100
Average cash out limit 4 times the bonus amount
Usually excluded payment services Skrill Moneybookers, Neteller, Crypto wallets

Your bankroll is the second most important thing after your health when it comes to gambling.

Thus, following the T&Cs specifications will make it easier not to affect your budget.


Please note that the data in the last table is strictly general and changes to a specific slot promotion that you will engage in are very likely to occur.

Bonus availability

Bonus availability

All bonuses come with an expiration date, calculated by the time you start playing it. During that time you will be able to play and, within the same timeframe, you need to complete the turnover.

It is important that you segment your time well because once a promotion expires your funds will be gone and not in any way usable.

Games accepted

When you’re given a bonus, it is likely that restrictions will be imposed on particular game titles. usually, disavowed games will be progressive or jackpot slots. Even so, read your terms carefully and figure out the specifics.


If you’re new to these games, find out how to play casino slots and make sure you read our guide on how to play slot machine for beginners before you engage in real-money play.

How to sign up & play online slot promotions?

How to sign up & play online slot promotions

  1. Pick any offer from our list that conforms to what you’re looking for.
  2. Click the blue “Play” button.
  3. Read the landing page instructions carefully.
  4. Sign up by creating an account.
  5. Use the bonus code when needed, taking it from the top part of our bonus boxes.
  6. When needed, confirm your account.
  7. Make the necessary payment and wait for it to be processed, unless it is a payment-free offer.
  8. You’re all set, you’re now ready!

Bonus step!

Save time from waiting on the cashout process by completing the KYC practice close to the moment you’ve signed up.

High RTP slots to combine with your bonus

Slot Game RTP Provider
Fire Joker 96.15% Play’ n Go
Eye of Horus 96.31% Reel Time Gaming
Twin Spin Megaways 96.04% NetEnt
Wolf Gold 96.01% Pragmatic Play
Fire and Gold 93.9% Slot Factory

Best payout slots

  • New players are advised to opt for high-RTP games and low variance slots for stable payouts
  • Our experts studied eCOGRA and other relevant audit reports to confirm those numbers
  • We also compared the reports with the official info on the game provider’s site

As a rule of thumb, you should remember that even though it increases your theoretical chances, choosing a high RTP game doesn’t guarantee success.

Understand slots range of bets

Slot Game Min Bet Max Bet
Fishin Frenzy £0.1 £20
Luck o’ the Irish £0.1 £500
Diamond Mine £0.2 £500
Book of Ra £0.2 £100

Be aware

While testing UK’s slots promotions, we played games which technically allow large bets per spin.

Be aware that a £500 spin on Luck o’ the Irish will certainly forfeit a bonus in this game since the maximum bet with extra funds is generally set at £5.


Maximum bet limits may vary from one casino to another.

How to cashout without issues?

How to cashout without issues

  1. Make sure your profile is complete and has all your accurate data filled in.
  2. Complete the wagering requirement beforehand.
  3. Pick a withdrawal method that you’re familiar with and it’s accepted by the casino.
  4. Check for fees, and, if there are any, choose an alternative.
  5. Request your cashout.
  6. After the specified waiting time, your funds should be in your personal banking account or e-wallet.


  1. Waiting times contain two parts, the casino’s time to check for any inaccuracies and the payment method processing time.
  2. You can find the waiting times for all the accepted withdrawal services on our reviews.
  3. Banks don’t process payments during weekends or holidays, thus, they have the longest intervals by default.

Features to look for in slot bonus codes

Features to look for in slot bonus codes

Your offer and the casino that created it need to meet the following requirements to achieve good quality:

Licence from the UKGC

In the United Kingdom, all online gambling services need to have a valid licence from the country’s official Commission. They assure fair gaming, methods of player protection, and protection of your data and funds.


All of the casinos on our sites have an active UKGC licence, so you need not worry about that. We’ve got you covered.

Game variety accepted by your bonus

We can confidently say that having multiple options when completing a bonus turnover constitutes an advantage compared to a single option.

No matter how much you prefer a game, having variety will break the monotony of your sessions.

Even so, we know that players look for slot bonuses personalised for a single game. In our listing, you’ll find both types, so we have a choice for you.

Mobile usability of your offer

Mobile phone usage makes up for around 80% of online gambling in the UK as well as worldwide. Thus, it is very likely you’ll want to play your promotion on your phone.

So, pick a casino that has a good rating in our User Experience section.

Reliability of the casino

Check our review before choosing any bonus. We go through the entire site and test its features. Then, we proceed to give objective ratings.


Any operator on CasinoAlpha that has a general rating of over 3.5 is reliable on multiple fronts.

Good customer support

Help to rely on when something goes wrong is essential. Thus, you need to know beforehand if the support agents give useful answers and how much time it takes to solve an issue.

Good thing that we do that for you with each review through the Customer Support section.

Responsible tools

Slot machine play is fast-paced and catchy; therefore, it can be very easy to lose track of time.

Responsible gambling tools may limit your sessions by time, payments, losses, or simply through reminders.


Our advice is to choose an offer from a site that has a wide selection of such tools. In our reviews, you can see their catalogue and how to use them.

Pros and Cons of slots bonuses

  • This allows you to access popular game titles within the most popular game category in the industry.
  • Most of them have a medium-sized wagering requirement.
  • They are easy to find and have multiple subtypes.
  • They are easy to play with and don’t require a complex strategy.
  • Some of them come without a turnover.
  • Sometimes, the availability of the bonus is small and puts time pressure on you.
  • They may be fixed for a single game.

Page methodology

By constantly improving our products, we build a relationship of trust between our users and us. That includes using references, sources, and techniques that are safe, clean, and vetted.

We always start from internal data extracted from our database, which we build in time without time shortcuts.

Then, we analyse each slot bonus through the lens of industry standards and player needs, which we know first-hand.

Lastly, we look at the related games by their settings:

  • Special symbols
  • Return to Player
  • Bet ranges

UKGC guides

iGaming Labs


Are slot bonuses reliable?

Yes, all of the slot bonuses on this page are reliable and legit, as they come from UKGC licenced casinos.

Are there new slot bonuses in the UK?

Yes, new bonuses appear on the market every month, and we make an effort to update this page with new offers as frequently as they appear after doing our due diligence with testing.

Which casinos have slot bonuses?

All of the casinos listed or mentioned on this page have a slot bonus or multiple.

What casino has the highest slot bonus?

Paddy Power Games is currently the casino with the highest slot bonus, made up of both extra funds and extra spins,

Which slot has the best bonus?

Mega Moolah has the highest paid bonus from one spin. All the jackpots of that type have the highest bonuses. The chances of getting a positive outcome are statistically lower than normal slots.

What is a slot bonus?

It is a casino offer in which you are given either funds or changes strictly playable on a slot game or multiple.
Cosmin Brehoi
Author Cosmin Brehoi Author & Editor at CasinoAlpha

Since forever a student of life and writer at his core, he loves to place bets on football matches in his spare time. Combining the art of prediction and a rigorously trained intuition, he has joined the iGaming world to promote a responsible and data-driven approach to sports betting.

Adina Minculescu
Reviewer Adina Minculescu Senior Author & Editor at CasinoAlpha
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