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Best Slot Bonus Sites - December 2021

Slot Offers (or a Slots Bonus) are the most common welcome packages offered by online slot sites and casinos for new players. Here, we list list the best slot bonuses including sites with a deposit 10 get bonus!

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Also known as ‘Welcome Bonuses,’ they usually comprise a percentage match of the initial deposit made by a new player.

This often amounts to at least 100%, although many operators push the envelope by offering up to 200%. Extras such as bonus spins are often included in the best casino deposit bonuses as well.

However, such incentives have become so widespread in the gambling industry that it can be difficult to identify the ones which offer the best ‘value’.

To help you in this task, WDW Bingo has compiled a list of the most competitive welcome deposits currently available.

We’ve also included advice about some of the things to keep in mind when searching for the best casino welcome bonuses, such as wagering, cash-out rules and time-limits. Scroll down to find out more.

  • Bet Storm is a quirky new Casino and Sports betting platform on the Progress Play platform with an eye-tingling neon green design. Something new for our players, but we'll think you'll like it!

    *New players only. Opt-in Required. Wager from real balance first. 50X wager the bonus. Contribution varies per game. selected games only. Wager calculated on bonus bets only. Bonus valid 30 Days from receipt/ free spins valid for 7 days from issue. Max conversion: 3x the bonus amount. Excluded Skrill deposits. Withdrawal requests voids all active pending bonuses. Full Terms Apply *18+ BeGambleAware.org Please play responsibly #ad

  • Voodoo Dreams is a SuprPlay casino that's coming to UK players for the first time. This site runs on a unique platform and has an excellent welcome offer including real money spins on first deposit.

    *18+ new players only. Maximum £50 bonus. Minimum deposit: £20. Deposit 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 requirement. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. Deposit Bonus expires after 30 days if wagering requirement has not been met. Free Spins expire after 3 days. One bonus allowed per person, address, device, IP. *18+ BeGambleAware.org Please play responsibly #ad

  • “Kaiser” is German for “emperor”- hence the little crown in Kaiser Slots’ logo. This online slots and casino site was launched in May 2017, and you can catch glimpses of the site’s mascot, a dog named Kaiser, around the site (though he’s not as visible as he used to be, due to regulations on child-friendly cartoon characters).

    *New Players Only 18+. Minimum Deposit: £10. Maximum Offer: 250% Bonus up to £35 & 20 Spins on Starburst. Bonus & Spins winnings must be wagered 35x before withdrawal. Spins expire after 24hrs. Promo Code: 250. Withdrawal & full T&Cs apply. Valid until 31/12/2021. *18+ BeGambleAware.org Please play responsibly #ad

  • Grosvenor Casino is the online slots site version of one of the UK's most famous casino chains. This classy but modern online casino has a big welcome bonus which even comes with no wagering free spins.

    *Claim Once Only, Min Cash Buy-in £20, Max Bonus £250 Plus 20 Free Spins, Valid 7 Days, Cash Buy-in & Winnings Playable On Classic Slots, 20xwr (Cash Buy-in & The Buy-in Bonus), Max £2 Stake, Free Spins Bonus And Winning Playable On Starbust Only, Free Spins Carry No Wagering. Keep It Fun – Set Your Deposit Limit. T&Cs Apply. *18+ BeGambleAware.org Please play responsibly #ad

  • Mecca Games is a brilliant slots and games site with a big Megaways slot bonus. The site is a perfect marriage between the Mecca Bingo brand and slot sites like Aspers Casino.

    *New customers only. Min deposit £10. 25x wagering reqs. 10x max convertible. 20 free spins on Gonzo’s Quest Megaways only. 5x wagering on free spins. 10x max convertible. Valid for 7 days. T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad

  • Parimatch is a unique slots and sportsbook site launched in 2020 from the BetVictor team. Listing on WDW Bingo for the first time, we have an exclusive welcome offer with free spins.

    *18+ New customers only. Opt in and Wager £10 within 7 days of registration, get £50 bonus for selected games with up to 40x wagering.Bonus/Spins expire in 7 days. Max Redeemable £1,250. Card payment only. Click for T&Cs. begambleaware.org *18+ BeGambleAware.org Please play responsibly #ad

  • Genie Riches is a new Dragonfish slots site launched in October 2021. There are over 700 slots and games and we have an exclusive code for a juicy welcome bonus.

    *New players. Valid once until further. Code “FIVE”. Min dep £10. 100% Games Bonus [GB] max £555. GB valid on selected games only. WR: 50x (dep + GB). WR vary by game. GB wins cap: £100 + initial bonus. Country restrictions apply. UK: deposit balance can be withdrawn at any time. 18+. Full T&C apply. *18+ BeGambleAware.org Please play responsibly #ad

  • SpinYoo is a classy new slot site from the creators of PlayZee. It is a White Hat platform site launched in the Autumn/Winter of 2021.

    *18+. New players only. Min Dep £20. Max Bonus Bet £5. Offer: 100% of 1st deposit up to £250 + 100 Yoo Spins on Starburst, Book of Dead, Fire Joker, Gonzo's Quest, & Big Bass Bonanza respectively (first 20 credited on 1st deposit; rest credited at 07:00GMT at 20/day). Spins expire after 23:59GMT on day they’re credited. Winnings from each 20 spins capped at £50 & credited as bonus. Bonus funds expire after 30 days, are separate to Cash funds, & subject to 35x wagering of bonus + deposit amounts. Only bonus funds contribute to wagering requirements. Bonus funds can only be used on slots. Full Terms Apply. Play responsibly. BeGambleAware.org *18+ BeGambleAware.org Please play responsibly #ad T&C's Apply

  • The Vic is the online home of the Grosvenor Victoria Casino located in central London. This brilliant new slot site runs on the same engine as Aspers Casino and has a large welcome package over 3 deposits.

    *New players only, must select in cashier, claim once only, min dep £20, valid 7 days, bonuses & wins playable on selected slots only, 40xWR (deposit+bonus), 5x max convertible, spins & wins usable on Red Tiger games only, 30xWR, £20 max convertible. *18+ BeGambleAware.org Please play responsibly #ad

  • Eagle Spins is another American frontier themed Jumpman Gaming slots site, hot on the heels of Wild West Wins. This site, however, has a bonus wheel welcome offer, where you could win a 1000% matchup bonus up to £1000.

    *New Players Only, £10 Min Fund, £1,000 Max Bonus, Max Bonus Conversion Equal To Lifetime Deposits (Up To £250), 65x Wagering Requirements And Full T&Cs Apply Here *18+ BeGambleAware.org Please play responsibly #ad

  • It was only a matter of time before one of the UK’s most luxurious bricks and mortar casinos would explode its online presence. Aspers Casino is best known for its mega casino at Stratford Westfield, with its incredible tables and slots as well as bars and restaurants. It even has a roof terrace that overlooks the Olympic Stadium.

    *AVAILABLE ON FIRST DEPOSIT ONLY. BONUS: MIN. DEPOSIT £20. DEPOSIT AND BONUS AMOUNT SUBJECT TO 50x WAGERING REQUIREMENTS (GAME WEIGHTINGS APPLY). WINNINGS CAPPED AT 5x BONUS AMOUNT. FREE SPINS: 10 BATCHES OF 10 FREE SPINS DAILY. WINNINGS CAPED AT £10 PER BATCH. FULL T&Cs APPLY *18+ BeGambleAware.org Please play responsibly #ad

  • Jammy Monkey is a cheeky-named new slots site from Intouch Games, the creators of Bonus Boss & mFortune. The software platform is entirely bespoke and the welcome offer is just as unique.

    *18+. New, ID Verified players only. Up to £10 bonus credit. 30x wagering requirement. 7 day expiry. £50 max withdrawal without deposit. T&Cs apply. 18+. New players only. 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. 30x wagering requirement. Bonus 1 expires 30 days after registration. Bonus 2 expires 30 days after 1st deposit. 24hr FS Expiry. T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad

  • Winners' Club is a new Nektan gaming site from the promoters that brought you Betfred Casino. This sleek and modern looking slots site has two things we love; Megaways slots and live dealer casino rooms!

    *Over 18s only. New customers only. First three deposits only. Min Deposit £10. max total bonus £500 and 150 spins. 30x bonus wagering (deposit + bonus), 30x spins wagering, 4x conversion. Selected slots only. T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad

  • Royal Valley Casino is operated by Grace Media and features an expansive range of online slots from top providers as well as a live dealer suite.

    *First 3 deposit only. Min deposit £10. Max total bonus £500 & 150 spins. 30x wagering(dep+bonus). 30x on spins, 4x conversion, bonus and spins valid on selected slots. Full T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad

  • Peachy Games is a brand-new Dazzletag slots site. There is endless fun to be had perusing hundreds of fun slots as well as a good table game and live dealer offering.

    *18+. 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 £20. 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. Full terms apply *18+ BeGambleAware.org Please play responsibly #ad T&C's Apply

  • Genting Casino is a casino gaming site featuring an extensive array of online slots and an award-winning live dealer platform.

    *First deposit only. Min. deposit: £10, Max. Bonus £50. WR of 30x Deposit + Bonus amount (Slots count 100%, other games 10%) within 30 days. Max bet is 10% (min £0.10) of the Bonus amount or £5 (lowest amount applies). Bonus must be claimed before using deposited funds. First deposit bonus can only be claimed once every 72 hr across all casinos. Bonus Policy applies.. *18+ BeGambleAware.org Please play responsibly #ad

  • SKOL Casino is a new casino from the creators of Slotnite. Originally launched in the Scandinavian markets, SKOL stands out especially for its enormous welcome bonus over your first few deposits.

    *18+. New Players only. One bonus offer per player. Minimum deposit of £10. Max bonus bet £5. This offer gives you a 100% match bonus up to £100 and 100 bonus spins. Bonus spins are valid on the following game(s) only: Starburst. Bonus spins to be credited at a rate of 20 bonus spins per day over five days, triggered on your first deposit. Bonus spins winnings credited in the form of bonus funds and capped at £50. Bonus funds must be used within 30 days and bonus spins within 10 days, otherwise any unused shall be removed. Bonus funds are separate to Cash funds and are subject to 35x wagering on the bonus funds only. Affordability checks apply. Terms apply. *18+ BeGambleAware.org Please play responsibly #ad

  • Spin Rio is a Brazilian themed Aspire slots site launched in 2021 by the creators of Queen Play and Mr Play Casinos. Get a great match bonus and spins combination!

    *Terms and Conditions Apply. New Players only. 18+. Min First Deposit £10. Min Second and Third deposit: 20. Wagering requirement apply 35x. Offer valid for 72hr. Spins expire after 24hr. 100 spins includes 3 deposits. *18+ BeGambleAware.org Please play responsibly #ad T&C's Apply

  • Queen Play Casino is a new Aspire casino from the developers of Mr Play. Check out the generous welcome offer in 3 parts and over 500 available slots.

    *Terms and Conditions apply. New players only. 18+. Min deposit £10. Wagering requirement apply 35x. Offer valid for 72hr. 100 spins includes 3 deposit. *18+ BeGambleAware.org Please play responsibly #ad

  • Have a delicious slots smoothie because it’s time to celebrate. During the Summer of 2018, Fruity Casa underwent a huge renovation and re-launch. The result? A new Fruity Casa which is a modernist masterpiece.

    *18+. New players only. Minimum deposit of £10. Bonus spins are valid on Fruit Shop only and subject to 35x wagering, and must be used within 10 days, otherwise any unused bonus spins shall be removed. Bonus funds are 100% up to £100 and separate to Cash funds. 35x bonus wagering requirements and only bonus funds count towards wagering contribution. £5 max bet with bonus. Bonus must be used within 30 days otherwise any unused bonus shall be removed. Terms Apply. BeGambleAware.org *18+ BeGambleAware.org Please play responsibly #ad

Best Slot Bonus Offers UK

So what constitutes the best slot bonus? Well, this is a subjective question – some players look for percentage matches while others prefer the additional perks such as bonus spins. Whichever your preference, there are a few things to keep in mind when searching for competitive welcome bonuses.

What is a good Casino Deposit Bonus?

As a general rule of thumb, look for welcome bonuses that offer at least a 100% match of up to £200. Anything lower should probably be avoided unless the promotions include additional incentives that are unusually generous, such as extra spins or no wagering slots.

Usually, you’ll need to deposit £10 to get bonus slots. You will also find some more generous slot offers than 100% match. For example, at some sites you’ll see deals like deposit £10, get £30 slots or even more!

What other types of casino bonus exist?

Extra Spins

Most online casinos offer from 50 to 120 extra spins as part of their casino deposit bonuses. There are exceptions of course, with some welcome promotions comprising up to 200. However, such offers are somewhat thin on the ground so try to identify bonuses that include a minimum of 50 spins.

What about wagering requirements on a slots bonus?

Behind every welcome offer lurks the bête noire of every casino-gamer: wagering requirements. Like it or not wagering, or play-through rules as they’re sometimes known in gambling parlance, are a fact of life. They generally require players to wager a multiple of their deposit (as well as the bonus itself in some cases), before any winnings can be withdrawn.

For certain players, wagering doesn’t present much of a problem. However, they should be treated like a wounded tiger – with respect and caution.

In the early days, operators would hide these harsh stipulations in their T&Cs pages. But recent, regulatory changes now require them to be included in all promotional advertising. Take a look at any casino welcome offer and you’ll see wagering rules written in small print beneath the shrieking promo headlines.

It’s quite difficult to recommend an acceptable wagering rate. Other than zero, we’d suggest something in the region of 30 – 40. However, you might want to stretch higher, depending on the generosity of the related bonus. For more information, see our no wagering slots page.

Time-Limits

Because of wagering rules, you’ll also need to pay close attention to promotional time-limits. After all, playing through a bonus and/or deposit some forty-or-so times won’t happen overnight.

So to protect any winnings you might accrue, be mindful of how long you’ve got to satisfy this requirement. The terms of many promos and offers can be satisfied within 30 days but be aware: some operators still impose draconian time-limits which make it extremely difficult to meet wagering rules in time.

Game Weighting on the Best Slot Bonuses

Game weighting should also be considered when choosing the best casino deposit bonus, with online casino games contributing different percentages towards the completion of wagering requirements.

While many standard slots contribute 100% to play-through rules, there are some, particularly those with high RTPs, which offer less. Additionally, table games are usually assigned low weighting percentages because their house edge is that much lower than other games.

To conclude then, it’s always a good idea to read the terms and conditions thoroughly before committing to any casino or slots deposit bonus. Although some welcome packages aren’t quite what they seem, there are plenty of offers, such as the ones included above, which offer genuine value for money. Just be sure that you’re fully clued-up about each restriction in place.

Slot Bonus & Offer Categories

For the rest of our slots bonus and offer type pages, see our list below to find the right brand for you.

No Wagering Slots - December 2021

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We list all the best slots sites with no wagering bonuses. We have exclusive, no deposit & free spins offers with real money wins, but you may need to play through your deposit first. Check our top no wagering slots...

No Deposit Slot Sites - December 2021

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These are the best new slot sites in 2021 with free spins no deposit offers in 2021 as well as established sites with great deals. Get free spins just for adding a card in the...

Best Slots Sites with Free Spins Offers

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Looking for slot sites that have free spins or bonus spins offers as part or whole of their welcome bonus? Then you are in exactly the right place. Here we list the best and newest slot sites with brilliant spin...

Exclusive Slots Offers

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Welcome to our Exclusive Slot Offers page. Here, you’ll find all the slot sites that we’ve struck special deals with to give you a unique (and totally better) deal than you would get if you went straight to the site...

Best Slot Bonus FAQs

Yes, very often a slots site will stipulate which slots and games are eligible in the bonus. Be careful to read the terms and conditions! Some bonuses may only be eligible on one slot game. Some may be eligible across a certain platform of slots. Some bonuses will accept a great majority of slots bonus across the site, but this is incredibly rare.

Sometimes, but this is becoming increasingly rare. Check the terms and conditions, but most casino bonuses will ask you to play through your bonus first.

Yes – this is pretty much always the case. The generosity of this figure varies massively from £2-£3 all the way up to hundreds of pounds. Often, it depends on the type of bonus. Free Spins winnings often have a lower cap. This information will always be included in the terms and conditions.

Yes, frequently. Check the T&Cs to see what the maximum bet you can make with your bonus is each time.

Usually, a site will have a separate live dealer casino welcome bonus. The new player may even be offered a choice between different types of welcome bonus. However, it is rare for a standard casino welcome offer to be playable on live dealer casino games. Sometimes they may be eligible, but the game weighting towards the wagering requirement may be miniscule.

Recommended Offers

Double Bubble Bingo Double Bubble Bingo Review

Deposit & Play £10, Get £50 of Free Bingo OR 50 Free Spins

Play at Double Bubble Bingo

*New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Free Spins: on Double Bubble. Spins value: 20p each. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. 18+. **£10 lifetime deposit required. *18+ BeGambleAware.org Please play responsibly #ad

Kwiff Casino Kwiff Casino Review

Deposit & Wager £10+, Get 100 No Wager Spins

Play at Kwiff Casino

*18+ new customers only. £/€10 stake within 30 days of registration. Spins on Book of Dead. £/€1,000 max win. Full T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad

Heart Bingo Heart Bingo Review

Spend £10, Get 500 Bingo Tickets + 25 No Wager Spins

Play at Heart Bingo

*18+ New customers. Deposit and spend £10 on Bingo tickets within 30 days of registering. Get 500 Bingo tickets for Heart Bonanza, 7 days expiry + 25 Free Spins on Heart Bonanza Slot Game, 7 days expiry. Click for T&Cs. | begambleaware.org | Please gamble responsibly *18+ BeGambleAware.org Please play responsibly #ad

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*18+ new customers only. £/€10 stake within 30 days of registration. Spins on Book of Dead. £/€1,000 max win. Full T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad

*18+ New customers. Deposit and spend £10 on Bingo tickets within 30 days of registering. Get 500 Bingo tickets for Heart Bonanza, 7 days expiry + 25 Free Spins on Heart Bonanza Slot Game, 7 days expiry. Click for T&Cs. | begambleaware.org | Please gamble responsibly *18+ BeGambleAware.org Please play responsibly #ad

*18+ new players only. Maximum £50 bonus. Minimum deposit: £20. Deposit 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 requirement. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. Deposit Bonus expires after 30 days if wagering requirement has not been met. Free Spins expire after 3 days. One bonus allowed per person, address, device, IP. *18+ BeGambleAware.org Please play responsibly #ad

*New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Free Spins: on Double Bubble. Spins value: 20p each. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. 18+. **£10 lifetime deposit required. *18+ BeGambleAware.org Please play responsibly #ad

*Min £10 in lifetime deposits required. Offer must be claimed within 30 days of registering a bet365 account. Reveal prizes of 5, 10 or 20 Free Spins; three spins on Free Spins reels available within seven days, 24 hours between each spin. Max. prize, game restrictions, time limits and T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad

*New players only, must select in cashier, claim once only, min dep £20, valid 7 days, bonuses & wins playable on selected slots only, 40xWR (deposit+bonus), 5x max convertible, spins & wins usable on Red Tiger games only, 30xWR, £20 max convertible. *18+ BeGambleAware.org Please play responsibly #ad

*New Players Only 18+. Minimum Deposit: £10. Maximum Offer: 250% Bonus up to £35 & 20 Spins on Starburst. Bonus & Spins winnings must be wagered 35x before withdrawal. Spins expire after 24hrs. Promo Code: 250. Withdrawal & full T&Cs apply. Valid until 31/12/2021. *18+ BeGambleAware.org Please play responsibly #ad

*New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. 18+. Free Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each. *18+ BeGambleAware.org Please play responsibly #ad

*New customers only. Min deposit £10. 25x wagering reqs. 10x max convertible. 20 free spins on Gonzo’s Quest Megaways only. 5x wagering on free spins. 10x max convertible. Valid for 7 days. T&Cs apply. *18+ BeGambleAware.org Please play responsibly #ad