37 Best Online Slot Bonus Offers for 2021

Many casinos offer online slots bonuses to encourage players to spin more, and obviously to spend more. Even if these casinos want you to spend more, these slots rewards can significantly help you in your gameplay.

So, we gathered the name of online casinos that offer various bonuses. We categorised these casinos based on the slot bonuses provided. But, first, we want you to give a briefer on the types of slots bonuses.


Types of Slots Bonuses

We enumerated four popular types of an online slots bonus. Some casinos offer one or two together upon signing up while others use them for promotional purposes.

Sign Up Bonuses

Also known as welcome bonuses, you can get this slot bonus when you sign up an account for the first time. Often, casinos match the amount of your deposit with the slots bonus you get.

This bonus can expire depending on the casino, and you need to use it before it expires. The expiration for slots bonuses vary, so make sure you read the fine print.

Free Spins

Free spins bonus is an excellent way to earn more winnings. However, this bonus requires a wagering requirement before you can withdraw winnings.

You can earn free spin upon sign up and while playing the game. No deposit free spins also exist, but a few casinos use it. Usually, the newest in the online casino offer such bonuses.

Deposit Bonus

This slot bonus is bigger in amount when you make your first deposit. From time to time, casinos offer deposit bonuses that match your recurring transactions.

You can receive this bonus during seasonal promotions. Usually, you have to meet a wagering requirement to qualify.

No Deposit Bonus

You can get bonuses such as free spins or cash without any deposit. Many slot players want this kind of slots bonuses, but it’s rare to find casinos that offer such bonuses.

Often, casinos give this no deposit slots bonus to encourage a player to try their game, especially for newly created ones. Its occurrence is rare.

Sites with Sign Up Bonuses

Here are eight casino site giving online slots bonus to players with first accounts.

BGO Casino

BGO casino provides 500 sign up bonus slots spins. The bonus is applicable in Twin Spins. The minimum deposit is £10 for the first accounts. The casino offers fun games from poker to online slots and a Mega Wheel where you can get slots bonuses.

Bonus spins have an expiration of 24 hours upon crediting to your account. So, make sure to use the bonus within the time frame. The wagering requirement is 64 times for winnings from spins, and maximum withdrawal of winning from free spins is £150.

Some payment deposits don’t qualify so watch out for these disqualifications to avoid committing the mistake. Such payments are Skrill and Neteller.


This online casino offers incredible sign-up bonus slots for its first-time players. The minimum deposit is £20. Your deposit will entitle you to 100% welcome bonus of up to £300.

If you deposit £20, you’ll receive an equivalent of £20 bonus. However, if you deposit £500, you can only receive £300. So, plan well.

You can also receive additional 100 spins on sign up, and ten daily free spins for the next ten days. If you opt for a VIP account, you can get 500 Zee points. The slots bonus is only applicable to Starburst slot game.

Wagering requirement from the bonus is 35 times to qualify for a withdrawal. The maximum drawdown is £50.


bCasino is an online operator with impressive features and offers competitive online slots bonus to its patron and new players. Upon account creation and deposit, you can receive sign up bonus slots of up to £1200 and 500 free spins.

You can deposit three times to get the slot bonus. On sign-up, use their code bFIFTY (first deposit). The casino provides weekly surprises, so keep yourself posted about these surprises. The unique feature of this casino is its offer of personal account manager for patrons.


888casino will make your gambling session filled with fun. It supports various currencies and payment methods. However, some payment methods don’t qualify for the bonus, so watch out for these important matters.

Its 200% sign up bonus slots is an excellent offer with a minimum deposit of £20. You need to use the code WELCOME200 to avail of the big bonus. With this rate, you can get up to £300, based on the amount of your first deposit.

The wagering requirement for the bonus is 30 times before you can make any withdrawal. Maximum winning for pay-out is £500.

The Sun Bingo

The Sun Bingo has the lowest minimum deposit with £10. On sign up, you can receive 50 spins for its slot game, Age of the Gods.

You must use these extra rounds in the next 48 hours. Otherwise, Sun Bingo will forfeit the slot bonus. Spins have 30x wagering requirement, and each round costs £0.20.

Valid methods include Apple Pay, Maestro, PayPal, Paysafecard, Skrill Moneybookers, Skrill 1-Tap, Visa Electron, MasterCard, Visa, and MasterCard Secure Code.

Moon Games

Moon Games offer sign-up bonus slots of 100 extra spins and up to £100 that are valid on Starburst, Shaman’s Dream, and Gonzo’s Quest. To receive this online slots bonus, deposit an amount higher than £10.

Moon games distribute the bonus spins in five batches with 20 each batch. Spins bonus has a wagering requirement of 85 times before you can make a withdrawal. The sign-up bonus is also usable in other Moon Games such as Blackjack and table games.

Valid payments made with PayPal, Visa, and Apple Pay can qualify for a welcome bonus. Check with Moon games to know more on legitimate ways to make deposits.

Hyper Slots

This operator offers the best bonus slots for its players, new or old. It gives away 500 sign up bonus slots spins for a qualifying deposit fo more than £10.

This online slots bonus is valid only for Fluffy Favourites and Starburst. On the other hand, deposits made with Maestro, Mastercard, Visa and Paypal can qualify for this bonus.

So far, there’s no expiration date for the spins bonus. But, the wagering requirement for winnings from the spins is 65 times.

Avail of their VIP club option to get awesome deals such as daily cash backs, birthday promos and a lot more.

Temple Nile

Temple Nile has an impressive sign-up bonus of up to £1500 and more than 100 bonus spins. The deposit to qualify for the slot bonus must be higher than £20. You need to make three deposits to get the total £1500 and 105 bonus spins.

The first deposit is 100% of the amount paid, and the bonus ceiling is £500 with 30 spins. Second deposit has a 25% bonus up to £800 plus 25 spins. The third deposit is 50% bonus with a max amount of £200 plus 50 spins.

Bonuses have a wagering requirement of 40x and expiration of 30 days. You should use your spins within 72 hours. Bonus is applicable for new players only.

Sites with Free Spins

Make your slot sessions more enjoyable with free spins from these eight operators.

Wink Slots Casino

This casino offers no deposit free spins up to 30, which are valid on 99Time, SugarTrain, and White Wizard Deluxe. These slots bonuses don’t have expiration dates so that you can use them anytime.

To avail of the bonus, register an account and verify your mobile number. You will receive the spins in three vouchers containing ten spins each. Watch out for daily challenges and tournaments.

Dr Slot Casino

If you’re new to the world of slots games, try Dr Slot casino without shelling out any penny. Dr Slot Casino gives new players no-deposit 20 free spins upon registration. The free spins are valid only in Fire and Gold slot game.

With these free spins, get to know how online slots work. However, you need to watch out for the wagering requirement. You have to wager your winnings 40 times before you can make any withdrawal.

The withdrawal limit after satisfying the wagering requirement is £50. Even if you’re playing for free, make sure to read the terms and condition to know the dos and don’t’s of the game.

PocketWin Casino

You can try the games in PocketWin Casino, especially the slots with £10 bonus credit without making any deposit. Technically, this bonus isn’t free spin, but you can use this credit to play slot reels.

Bonus credit will expire in 7 days, and prizes from the online slots bonus credit have a wagering requirement of 40x. You can withdraw your prize of up to £50.

If you decide that this casino matches your slot gameplay, you can make a deposit and will receive a 200% match up bonus of up to £500. The deposit bonus expires in 30 days.


LeoVegas is an award-winning operator because of its innovation. Again, this casino operator proves its client-satisfaction-first policy by giving out 20 free spins to new players. This slots bonus doesn’t require a deposit.

You get to enjoy its Book of Dead for the next few days. Free spins are claimable within 14 days and playable in seven days. Wagering requirement applies, which is 35 times on winnings from the free spins.

Mr Spin Casino

Have fun and create a fresh slot gambling experience with Mr Spin Casino. With its exclusive online slots game, you get to use 50 free spins without any deposit. The no deposit slots bonus is valid in Reel Royalty.

Before you can make any withdrawal of £50 (max), you need to place bets of up to 20 times or more. Promotion is only applicable to new players. Claim and use the bonus credit in seven days before it expires.


Under Playtech, Casino.com is an exclusive operator of slots games. It offers no deposit slots bonus of up to 20 free spins. The extra rounds are valid in the Age of the Gods.

Take note of the wagering requirement, which is 20 times of winnings from the credit bonus. The pay-out limit is £100.

Claiming is quick and easy. Create an account, activate it and receive the extra rounds upon sign-up. You don’t need to make any additional deposit until you’re sure you want to play the slots games at Casino.com.

When you’re ready, you can make a minimum deposit of £20 to continue playing and winning.

Trada Casino

Receive ten free spins without making any deposit when you create an account with Trada Casino. Trada Casino is an exclusive casino for slots games. Its offer of online slots bonus is an excellent start for new players.

Winnings from the bonus spins have a wagering requirement of 25 times. The ten free spins have a value of 10p Maximum pay-out is £100. Read the terms and conditions carefully before making an additional deposit if you want to continue playing after using up your slots bonus.

Fun Casino

Slot rollers are always on the look-out for new and exciting games. Fun Casino could be your next favourite because their objective is to spoil every new player by offering casino slots bonuses.

If you’re hesitant, here are 20 extra spins with no deposit requirement. Use these spins to understand the gameplay of Fun Casino slots games.

Fun Casino online slots bonus has a wagering requirement of 50 times. The maximum pay-out is £100. For more slot gambling credits, make a minimum deposit of £10 to avail of bonus funds.

Get up to 100% match up bonus for your deposit and up to 100 free spins. When you deposit with Fun Casino, enjoy an unlimited amount of pay-out.

Sites with No Deposit Bonus

Every slot player wants to try any game without paying at first. Thus, we search the internet with online casino and slot sites that offer online slots bonus. Here are six sites with no deposit slots bonus.

The Online Casino

One of the casino slot bonuses that Online Casino offers is the no deposit slots bonus. New players get £5 bonus credit upon registration. Registration requires an SMS validation, so make sure you have your mobile phone with you.

With this £5 bonus credit, you have chances of winning real money. However, you need to wager your winnings from the bonus credit 100 times. When you earn £20, you can withdraw this amount.

mFortune Casino

mFortune Casino offers online slots bonus of up to £10 without any deposit. The wagering requirement is 20 times on winnings from the bonus credit. You can pay-out a maximum of £200.

Bonus credit expires in seven days, so grab this opportunity to learn the slots games of mFortune casino. The bonus is valid on slots games and other online games under the casino’s operation.

777 Casino

Here’s another no deposit bonus credit from 777 Casino. The casino has a loyalty programme that allows you to earn points as you deposit and spend more in its online games.

The £21 bonus credit is valid with slots, roulette, baccarat and other online casino games from the operator. You don’t have to deposit any amount to use the bonus credit, but you have to sign up using the promotional button. Verified accounts can only qualify.

Use the no deposit slots bonus within seven days before it expires. The wagering requirement is 30 times on winnings from the bonus before pay-out is available.

William Hill

Register an account with William Hill and get £10 online slots bonus without making any deposit. The process is easy. Click the promotional button and validate your email address.

The £10 has a wagering requirement of 35 times to qualify for a pay-out. The pay-out limit is £25. This no deposit slots bonus is valid only for new customers and expires in 72 hours.

Always read the terms and conditions to know more about currency and payment method restrictions.

Jackpot Mobile

This operator provides more than 700 games, including online slots. To lure new players, Jackpot Mobile offers no deposit slots bonus of up to £5. The online slots bonus is valid on Candy Swap, Shamrock N Roll, and Mayan Marvels.

Account creation is secure, which requires an SMS validation. Make sure to click on the promotional button to qualify for the bonus.

The slots bonus has a wagering requirement of 100 times before pay-out. Pay-out is up to £20.

Monster Casino

This online casino offers a slot bonus of £5 upon registration without deposit. The offer is available to first-time customers. This bonus credit can give you a wagering advantage because you get to learn about the slots gameplay in Monster Casino.

The wagering requirement is 100 times on the winnings of the credit. You can pay-out when you earn £20. When you’re ready to indulge yourself and upgrade your gambling experience, you can make a deposit.

Sites with Deposit Bonus

Are you ready to upgrade your gameplay? Here are eight slot gaming websites that offer a deposit bonus for new customers making the first payment.


One of the best bonus slots we encountered is the offer of Conquestador. First deposit entitles you to receive 200 spins and 100% match bonus of up to £100. The minimum deposit to qualify is more than £20.

The online slot bonus is valid for up to 70 days. You will receive the spins credit for next days with 20 credits per day. The first 20 credits require activation before you can receive the next slots bonuses.

The wagering requirement is 40 times on the winnings from the extra rounds. By the way, the slot bonus is valid on Book of Dead only.


This operator offers 10% cashback and a first deposit bonus of up to 100%. With a minimum deposit of £10, you get to enjoy this online slots bonus. Make your first deposit using qualified payment methods except for Skrill and Neteller.

Wagers have to reach 35 times to become eligible for pay-out. The maximum bet level from online slot bonus is £5. Cashback promo has no restrictions and will entitle you to receive real money.

Valid payment methods include but not limited to a bank transfer, Visa, Paypal, Mastercard Secure code and much more. Check with the site to see the complete list of qualified payment methods.

Aside from online slots bonus, you can use the deposit bonus on other CasinoCasino online games.

STS Casino

The first deposit bonus is £50 with a minimum deposit of £30. Valid payments are Mastercard, Rapid Transfer, and Visa to qualify for the online slots bonus. Watch out for invalid payment methods concerning the slots bonus.

STS casino offers one of the best bonus slots because of its exclusivity with slots games. The 40x wagering number is fair and competitive. Achieve this requirement, and you’ll get to pay-out real cash.

PlayOjo Casino

So far, this offer is one of the best bonus slots we encountered. You can get 50 bonus spins with a minimum deposit of £10. What makes it great is the zero wagering requirement.

Each spin has a value of 10p and is valid only for slots games.

You don’t need to satisfy some wagering times to pay-out. However, terms and conditions apply for pay-out such as the minimum and maximum limit for the pay-out amount.

BetVictor Casino

The minimum deposit for BetVictor Casino is £10 with a £25 slot bonus out of the total £90 bonus funds. Slots gift needs to reach a wagering requirement of 40x. You need to place your bets 40 times using the slot bonus and its winnings before pay-out.

To get the bonus, create a new account and validate it. Terms and conditions apply on casino slot bonuses. So, make sure you read them more carefully before placing more deposits to fund your slot games.

NetBet Casino

This operator boasts of first-class user interface and features. Deposit more than £10 using the valid payment methods such as PayPal, AstroPay Direct, Bank Transfer, Ecopayz, Klarna, MasterCard, Visa, and Boku.

Use the code WELCOMEB to avail the promo of 100% first deposit bonus and ten extra spins. The additional rounds are valid for the game Age of Gods. The wagering requirement for the extra spins is 50 times.

When you met this requirement, you can withdraw real cash of up to £500. Read the terms and conditions carefully because it governs the restrictions of the online slot bonus to enjoy gambling fully.

Casimba Casino

Casimba Casino (UK) is a top-notch gambling operator with excellent slots bonuses. First deposit entitles you to 50 free spins, valid for Starburst slot game.

The deposit is more than £20 to qualify for the bonus. Aside from this slot bonus, you also get a 100% match bonus of up to £500.

New players also get 500 Loyalty points if you want to become a VIP player.

Spins expire in 72 hours and have a wagering requirement of 35 times. Upon reaching the wagering number, you can pay-out real cash up to £100.

GreenPlay Casino

With a minimum deposit requirement of £20, enjoy an Egyptian-themed casino site. Furthermore, GreenPlay Casino offers 100% bonus with a maximum of £25 and 25 spins on making your first deposit.

You need to pay wagers of up to 35 times on spin winnings before you can make a pay-out. Use the spin and bonus fund within 21 days before these credits expire.

This promo is valid until further notice, so grab this opportunity now to play your favourite slot games in GreenPlay.

New Sites with Slot Bonuses

We know how exciting slot games are, especially if these games offer the best bonus slots. So, we tried looking for new slots sites to explore. Here they are, our seven picks for 2020:


Register as a new player with Cashmo using their straightforward process. Upon validation of your mobile number, you’ll receive 50 spins with no deposit requirement.

Using the mFortune software, Cashmo allows you to play the Rainbow slots with 50 free spins. These spins require 40 times wagering to be eligible with pay-out. The cash-out limit is £50.

Make sure to use the 50 spins within seven days before they expire. Click the promo link to start playing and win some prizes.

Casino 2020

If you’re looking for a new game with casino slot bonuses, Casino 2020 is your right choice. It offers new customers 20 free spins upon complete registration. The good news is you don’t need to deposit to enjoy the online slot bonus.

However, the slot bonus expires in 7 days, so use this opportunity to evaluate the game. By the way, the spin bonus is only applicable for the Cleopatra slot game.

The maximum withdrawal is £100 after making a wager of 40 times.

Jackpot Village Casino

Hit the jackpot with this new casino among UK players. But, before that, you need to register an account and fund it with a minimum of £20. The bonus fund is impressive. You can get up to £500 of bonus fund and 50 slots bonus spins.

The online slots bonus is valid for the slot game Book of Dead. You can withdraw real cash winnings of up to £20 after satisfying wagers of 40 times.

Jackpot Village Casino is quite strict with its wagering requirement. You need to meet the wagers of 40 times within 30 days. On the other hand, the slots bonus expires after 72 hours.

Nevertheless, the bonus credit is an excellent way to start.

Royal Bet

With more than 1500 games, Royal Bet boasts of a neat selection of slots games. It offers casino slot bonuses to new players who deposit more than £10.

Upon meeting the deposit requirement and account creation, you get up to £50 bonus funds and 50 bonus spins. You can use these slots bonuses on Berry Burst. The slots bonus expire within 72 days, so make sure to use them all up before they disappear.

The wagering requirement is 60 times within 30 days. After satisfying this requirement, you can withdraw real cash.


When boredom strikes, lighten your day with the newest casino with slots game online. Casushi offers first-time deposit of up to £50 and 50 extra spins for Starburst slot.

The online slot bonus is not as impressive as Jackpot Village Casino’s offer, but it is a good start. You can use ten spins a day to win prizes in Starburst. You can withdraw your winnings provided you made wagers up to 40 times.

CasiPlay Casino

Use this code Burst125 to get the first deposit bonus of CasiPlay Casino. It offers a 125% bonus or up to £200, whichever is applicable. You will receive an additional 30 spins upon registration.

The slot bonus is valid for the game Starburst and must meet a wagering requirement of 35 times within 21 days. After that rollover requirement, you can withdraw your prizes.

So, what are you waiting? Make that deposit of £20 and get the slots bonuses using a simple registration process.


This newest platform can create a unique gambling experience for slot players. PeachyGames has a mobile integration advantage over other online slots.

Get its latest welcome bonus of up to £100 and 20 slots bonus spins. The bonus spins are applicable with Berryburst.

With a minimum deposit of £25, you can enjoy this competitive bonus offer. Start spinning the reel within minutes after creating an account.

The free spins have a wagering requirement of 40 times before a pay-out is possible. Pay-out is up to £500 for each kind of bonus.

How to Find and Earn More Online Slots Bonus

Indeed, there are other ways to earn free spins and bonus funds aside from the ones we mentioned above.

Loyalty Points

Many slot casinos offer loyalty programmes. Check out this information in their FAQ. Some casinos use your loyalty points to ascertain the level of your VIP membership. However, others will allow you to use your points for free spins, bonus funds or real money conversion.


Some slot casinos will hold tournaments to keep the excitement of players at a high level. Prizes from these competitions may include free spins, casino slot bonuses, or bonus credits. So, watch out for those announcements from your favourite slot sites.

VIP Membership

Signing up for a VIP membership often entitles you to receive free spins and other slots bonuses. However, keep in mind that this membership may require additional sign up fee.

Daily Log-ins

Some casinos may give daily log-in slot bonuses, especially if players make deposits more than the minimum. Another daily activity may include spinning a bonus wheel for free spins and slots bonuses.

Seasonal Casino Offers

Casinos that are operating for years give seasonal casino offers such as Christmas free spins, Halloween slots bonus, or Easter casino slot bonuses. Operators are creative when it comes to promotions, so watch out for these offers.

Friend Referral

A few slots casinos offer slots bonuses when you refer a friend to their site. It’s an affiliate programme that casino operators use to encourage more players to sign up.

Usage of Mobile Versions

Sometimes, the slot bonuses with desktop version vary from the mobile versions. Most often, the use of the mobile version entitles you to claim more online slot bonus.

Promotional Codes

From time to time, casinos advertise promotional codes on their site. You may opt for the newsletter of your favourite slot casino to get updates on these codes.

How to Keep Your Security with Gambling Sites

We know this section won’t help you find free spins, but we feel compelled to give you some tips in keeping your security while enjoying your slot games and casino slot bonuses. So, here are some tips you might want to keep in mind while registering with an online site:

Look for the UKGC License

All gambling companies, either online or offline, have to undergo strict compliance with government regulations. One of these licenses is the UK Gambling Commission.

Once approved, casino operators have to display this logo together with their license number. So, players can verify the legality of a casino site.

Look for the eCogra seal

This seal says that a slot casino operators implement fair gameplay for players. If these operators don’t abide by the organisation’s regulations, they lose their integrity and the trust of players.


Do I need to use promo code to qualify for slots bonuses?

No. Many casino slots bonuses are automatic once you met the requirement for sign up, such as paying the minimum deposit. However, some operators use code.

You’ll know upon registration if the process requires a promo code. Occasionally, slot sites issue promo codes in line with company anniversary, seasonal events

Why does some sign-up process need a promo code?

Sometimes, casinos partner with third parties. The registration often is a verification method that you visited the site for a sign-up bonus. If you aren't sure about this code, you can always ask the tech support for more details.

Do slots casinos offer loyalty programmes?

Yes. A lot of casino offer loyalty programmes to ensure the loyalty of returning customers. However, not all offer such privileges to players.

Is loyalty programme worth it?

Yes, if the slot sites adopt different schemes to reward their players. Many loyalty programmes use a tiered system, and casino operators use your points to determine your VIP membership.

Having a loyalty programme entitles you to some deals that you can use in your gaming. Your gameplay determines the number of points you can earn. More playing means more points.

Wagering may earn you more points. Alternatively, fixed deposits may double your loyalty points to some extent. The point system differs, so make sure you read the fine print of the loyalty programme.

Can I significantly increase my chances of winning?

Indeed, you want to increase your odds of winning, so you can meet the wagering requirement. Honestly, it’s hard to find specifics strategies on the internet because slots games vary a lot.

What you need, however, is to study the RTP rate for each slot game you encountered. The factors affecting this rate include how often you win and how many players are wagering.

Can I reject a slot bonus?

Yes, you can. You don't have an obligation to accept every online slots bonus that your favourite slot casino offers. You can just let the slots bonus expires. Alternatively, don't meet the qualifying requirements to reject a slot bonus.

Can I claim casino slot bonuses more than once?

Unfortunately, you can only receive one bonus at a time. However, you can receive daily or weekly slot bonuses if your slot casino allows it.

I met all the qualifications, but why does my bonus not in my account yet?

Check with the tech support. There could be some delays, and the slot casino can only answer this dilemma, provided your payment is valid.

Some slot casinos explicitly mention payment methods that don’t qualify. So, be aware of these restrictions when signing up.

Wrapping Up

Getting online slots bonus is fulfilling and exciting for slot players because you can have more spins to reel and more slots bonus to wager. When signing up for slots bonuses, always remember these things.

First, the wagering number should be fair and reasonable enough. A wagering requirement of more than 100 may not be appropriate for a slot bonus of £5. You also have to consider the RTP of the game.

Second, the pay-out should be too high that it would be difficult for you to reach it. Is a £1000 minimum pay-out is a fair game to a wagering requirement of 40 times? Think about it. Again, your odds of winning has something to do with the RTP.

We hope we help you with your hunt for slots bonuses. Happy gaming!

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