Slot Bonuses – Welcome Offers & Promotions October, 2021

Slot bonuses are one of the best ways to enjoy slot games online. By claiming a slot welcome bonus, you get the chance to boost your bankroll, extend your time at the online casino, and better your odds of landing some pretty impressive wins. We’ll tell you all about the many different types of slot bonuses you can claim. So read our ultimate slots bonus guide to find out where you can claim the hottest offers!

Last Updated on 31/08/2021 by George Mizzi

Online Slots Bonuses and the Different Types You Can Find

Slots bonuses come in a variety of shapes and sizes. And usually, the boldest and most attractive casino offers are the ones aimed at new players. These can come in the form of elaborate promotions featuring massive match bonuses (200% and upwards, for instance). And these same promotions may also be package deals that cover several deposits at a time. Best online slots can also get you fantastic deals as a returning player. Some of the best slots bonus offers can be part of seasonal or recurring promotions at the online casino. And thanks to the gamification trend that many gaming sites have picked up, players can regularly benefit from frequent, highly entertaining rewards.

And they don’t necessarily need to be cash offers!

That’s right; not all slots bonuses have to be credited in the form of cash. In fact, the most traditional type of bonus intended explicitly for slot games is free spins. Of course, free spins can also be particular because they may be meant for a specific title. This is a common technique used to promote a given slot game, for instance. And vice versa, the free spins may be offered for a slot game that is already very popular and will attract more players.

Slots Welcome Bonus to Ease Right Into Gameplay

Slots welcome bonus offers are consistently among the “loudest” and most eye-catching promotions. And, as is usually the case with casino welcome bonuses, they can be pretty varied. For example, there are slots sign up bonus offers that don’t even require a deposit. And these are often offered as free spins on registration, for example. In other instances, which is often the case, the welcome bonus is a cash offer that matches your deposit. And the match may be anything from 100% to 300% slot bonus and even up to 500%.

Furthermore, welcome offers can be extended to cover more than just your first deposit. In fact, they can often reward three, four, and even up to five of your first deposits. Of course, the subsequent deposits perhaps won’t be eligible for as large a match bonus. But it’s still a very generous offer with great opportunities to enhance your bankroll and overall gaming experience. It is a good idea to regularly check our no deposit slots guide as UK casinos tend to publish such offers more often now.

Editor’s Choice Casinos for October:

Casino Planet
A great platform to get started on, no matter if you’re new to gaming or a pro. The user-friendly layout and fairytale theme create a cozy and welcoming atmosphere. The site greets new players with a generous first deposit bonus and free spins.
Casino Gods
The site has a bouncy design with vibrant colours, and a whole sea of different exciting titles to choose from. And on top of that, here players get to enjoy fast withdrawals and top-level welcome packages.
Spin Rio Casino
A very safe online gaming platform that’s already been around for a number of years and has a proven track record of fair play and excellent player treatment. The site offers a truly impressive selection of games.


Slots Deposit Bonus Offers – Multiply Your Bankroll!

Slots deposit bonus offers are something that any player can benefit from, no matter their status at the casino. Casino deposit bonuses can cater to both new and returning players alike. And just as with welcome offers, these can be credited in the form of cash to your bonus balance or as free spins. Sometimes maybe even as both! Depending on the exact promotion you’re aiming for, you could receive bonus funds that you can use on all slots if you so choose. And then, if it’s a free spins bonus that is offered on your deposit, you will get the chance to play a particular title that may be new or just very popular with players. Since the beginning of slots history there have been slots bonuses and there will be. Let’s explore the Pros and Cons and compare the best ones. Check the latest offers!

200% Slots Deposit Bonus

200% casino bonus offers are becoming more and more prevalent in the iGaming industry. And they’re certainly an improvement on the previously most popular variation of 100% match offers. After all, they do offer to triple your bankroll, which is always great news. And another nice thing about 200% match bonuses is that they are no longer exclusively in the domain of welcome offers. These days, it’s also starting to become common to see this type of bonus offered as reload promotions that returning players at the casino can take advantage of on multiple occasions.

500% Slots Deposit Bonus

Nothing says attractive like a 500% casino bonus. Imagine depositing £20 at the online casino of your choice to be rewarded with £100 on top. And in total, you get to enjoy a bankroll of £120 on your favourite slot games. That’s six times your initial deposit! As you might think, generous offers like these aren’t as easy to come across as some of the smaller-sized match bonuses out there. But that’s why we’ve carefully sought them out and gathered them all in one place – here for you to choose from. And you can be sure that our selection features promotions only from reputable and trustworthy platforms.

Free Spins Slot Bonuses – Why They’re Such a Great Catch

Free spins are always a treat, no matter how many of them you receive. And they’re a type of bonus created specifically with slot game players in mind. But what makes them so great is that they offer a fantastic opportunity to play a slot game that you may have never tried before. And especially if it’s a free spins on registration offer of, say, 20 free spins, then you get to do it risk-free.

In other cases, free spins may be complementary to a cash bonus and offered on deposit. For example, a popular amount is 25 free spins, and in these cases, you may even have the freedom to choose the exact slots you’d wish to play. Furthermore, free spins often have lower wagering requirements, which is an added benefit to these types of promotions.

No Deposit Free Spins Slot Bonus

No deposit free spins can be found at many of the best casino sites these days, and they’re a delightful offer to take advantage of. On the one hand, you obviously don’t risk your funds and get to play slots. But in addition to that, you get to spend some time at the online casino and really get a feel for it. That way, you have the chance to see what the platform and games are like before you decide to commit by depositing.

Latest Slots 

Slots No Deposit Bonus Offers – Play Without Risk

Slots no deposit bonus offers do pop up every so often, and when they do – they’re always highly attractive to players. And it makes perfect sense for them to be so. After all, when claiming no deposit offers, you aren’t risking any of your own cash to play games. Instead, you’re using the funds of the casino. And for players interested in online slots, no deposit bonus offers provide the opportunity to explore the casino and its games without making a commitment. Of course, even though there’s no deposit required, these slots bonuses may still have strings attached to them. So if you do happen to make some wins from the bonus received at the online casino, chances are you will need to wager it if you’d like to withdraw those winnings.

£10 No Deposit Slot Bonus

A £10 no deposit bonus is a substantial amount for a casino to offer without requiring any deposit. And while it may not sound like very much, it’s actually more than enough to enjoy some exciting games. And while you’re at it, you can accumulate some wins, too.

£5 No Deposit Slot Bonus

£5 no deposit offers are perhaps the easiest to come across due to their small size. But don’t let that fool you into thinking they aren’t worth anything. On the contrary, £5 can be stretched out enough to have some fun and get a feel for the online casino at the same time. And winnings are always a bonus, of course.

Where the Best Slot Bonus UK Casinos Are

When choosing a slot bonus, UK players need first to pay attention to the casino offering it. You will want to make sure that the platform is safe and secure beforehand, especially with new online slot sites that haven’t yet had the time to build a reputation. All the best UK slot sites, on the other hand, are regulated by the UK Gambling Commission and have iron-clad policies in place to protect their players. Furthermore, they’re also very exciting platforms to be on with tons of online slots bonus offers and various other promotions running.

  • Licenses. Any online casino that seeks to offer its services on the UK market must, by all means, be licensed and regulated by the UK Gambling Commission. So make sure the casino of your choice has such a license, which you can check in the site’s footer.
  • Game Selection. The casino games are the whole reason why we bother visiting these platforms, to begin with. So you will want to see plenty of high-quality offerings in the styles and genres that interest you. Look out for brands that you like and any filters that can help sort the games more conveniently.
  • Security. Security is paramount at all online casinos because we trust these sites with our private information, as well as with our financial transactions. For this reason, it’s critical that the gaming site of your choice uses strong encryption to protect this data accordingly.
  • Payment Methods. The casino must support payment methods that are available in the UK and that you are comfortable using. Then, in addition to that, note whether those payment methods can be used both for deposits and withdrawals. And last but not least, take note of transaction fees and time frames.


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Here’s How You Find the Best Online Slots Promotions

The best slot bonus is, of course, the one that’s offered by a safe gaming platform. But after you’ve made sure that the house is trustworthy, reliable, and suits you in every other way, it’s time to take a closer look at the bonus itself. First, assess the value of the bonus. If it’s a match bonus, how much will it be worth to you depending on the amount you wish to deposit? How much of an increase to your bankroll will it result in? And if the bonus is offered as free spins, then you would need to consider the value of each free spin and multiply it by their total number. E.g., if you receive 50 free spins worth £0.20 each, then you’d receive a total value of 50 x £0.20 = £10.

Determining Whether It’s Worth It

Now, finding a bonus that offers you a significant boost to your bankroll is lovely. However, to know whether it’s really the best slot bonus, UK players need to consider the bonus terms. Most importantly, you will want to acknowledge the wagering requirements. If there’s a bonus of £50 on offer, and another one that’s worth £100, but both have the same wagering requirements, which one would you go for?

Obviously, the £100 offer seems more attractive. But you would need to wager twice as much in order to release the winnings of the £100 bonus than those of the £50 bonus. So here, it’s also necessary to keep your own gaming style in mind. If you’re a very active player, and wagering twice as much isn’t a problem, then perhaps the larger bonus would be more sensible for you. Consider also the time limits of the bonus, as those can help you determine whether the wagering requirements are reasonable enough for you.

Welcome Bonus Slots – Terms & Conditions (and limitations)

The slot bonus terms are an absolute must-read before you accept any bonus or promotional offer. This is where you will find all the necessary information regarding the offer in question, including also what you need to do to claim it. For instance, if it’s a deposit casino slots bonus, then it will tell you what the minimum deposit amount is. Aside from that it, it will also tell you exactly how much your bonus can be worth at its most. Most offers have a cap, especially match bonuses, e.g., 200% up to £400.

Then, of course, the wagering requirements are a significant part of the bonus terms. Here is where you will need to pay attention to how many times you are expected to roll over the bonus. In addition to that, note any time limits associated with the slot offer. The time frames may apply to the fulfillment of the wagering requirements. But they may also apply to the bonus itself, as is often the case with free spins, for example. So you may have to use the bonus within a certain period before it expires.

Best Gaming Providers for 2021


Game ProviderYear FoundedTop GamesBest Casino Site
Netent provider logo1996Gonzo's Quest, Twin Spin, Blood Suckers 2metal casino
playtech logo1999Goblin's Cave, Ugga Bugga, A Night Outvideoslots casino
Microgaming Logo1994Mega Moolah, Thunderstruck II, Mermaids MillionsCasino Gods Review
play'n go logo1997Rise of Olympus, Book of Dead, Reactoonzcasino cruise
Quickspin Logo2011Sakura Fortune, Treasure Island, Big Bad Wolfcasino planet
thunderkick logo2012Pink Elephants, 1429 Uncharted Seas, Esqueleto Explosivosloty casino
evolution gaming logo2006Free Bet Blackjack, Speed Blackjack, French Roulettekassu casino

Netent provider logo

Year Founded: 1996

Top Games: Gonzo's Quest, Twin Spin, Blood Suckers 2

Best Casino Site:

metal casino

playtech logo

Year Founded: 1999

Top Games: Goblin's Cave, Ugga Bugga, A Night Out

Best Casino Site:

videoslots casino

Microgaming Logo

Year Founded: 1994

Top Games: Mega Moolah, Thunderstruck II, Mermaids Millions 

Best Casino Site:

Casino Gods Review

Slot Offers & Their Wagering Requirements

Casino wagering requirements generally come in two distinct types. Usually, they apply only to the bonus amount you’re received. But other times, they may also include the amount of your deposit. So that’s something to keep in mind when calculating the total amount you’re expected to wager. As for the wagering requirements themselves, they are usually written as a number. And that number tells you how many times you need to stake the bonus, e.g., x30, x35, etc. Hence, low wagering casino bonuses are always preferable as they are easier to roll over.

Game Contribution

An important point to note in the bonus terms is the contribution weight of the different casino games towards the wagering requirements. Different offerings have a different house edge and RTP, and so not all of them will contribute the same amount towards the bonus rollover. For example, a slot game with a 100% contribution will contribute the entirety of every bet. A game with a 50% contribution, on the other hand, will only contribute half of every bet. So it’s ideal to stick to games with the highest possible contribution weight, as they will help you meet the wagering requirements faster.

The Best Bonus Slots to Play

The best bonus slots are the ones that you can most commonly find bonuses for. And usually, these are already some of the best slots to play online, even without the bonus element. Here’s how the logic works. Slot games that have great visuals, a compelling slot theme, and an enjoyable setup with excellent winning potential quickly earn the love and respect of players. And as a result, they become very popular, which doesn’t escape the attention of online gaming sites. So the online casinos adapt accordingly and design their online slots offers and promotions around these, particularly hot slot games.

Let’s Get Specific

An excellent example of an online slot game gone viral is Starburst by software manufacturer Netent. Although somewhat simplistic in terms of its structure, the game has a tremendous following of loyal players, even years after its release. The arcade-style visuals and high-quality graphics, along with the mesmerizing soundtrack and seamless gameplay, have made this a hit title. And many online casinos place their bonus offers of free spins for Starburst at the forefront of their promotional campaigns. So if you’re already a fan of this slot, you won’t have trouble finding great bonuses to use on it.

Mobile Slot Bonuses – Play On-the-Go!

The excellent news for mobile gaming fans is that these days, the majority of online slots are also online mobile slots. And casino sites, both new and old, have optimized their platforms to accommodate all sorts of devices and screen sizes. With that said, regardless of the type of bonus you choose to claim, you shouldn’t have any trouble making use of it while you’re on-the-go. As a matter of fact, many slot sites today have even launched their own apps for Android and iOS, so you don’t even have to play in your browser!

Mobile Slots No Deposit Bonus

If you prefer playing mobile slots, no deposit bonus offers are an excellent opportunity to do so without risking your own funds. Typically, bonuses for mobile slots with no deposit required will be offered in the form of free spins, so you may wish to have a look at our selection of the best free spins bonuses.

Slots Bonuses and Playing Responsibly

Responsible gaming is a huge deal when it comes to online casinos. And one of the factors we recommend taking note of when choosing an online gaming site actually involves the platform’s attitude towards this very sensitive matter. Bonuses and casino games can be very fun. But too much of a good thing can become an issue. So it’s crucial that online casinos be ready to assist players who’ve crossed the fine line between fun and problem gambling. If you feel your gambling becomes a problem do not hesitate to contact someone to help you, for example

Counseling & Self-Exclusion

Any decent online gaming site will usually have links to direct you to counseling organizations that specialize in helping people with addictive gambling patterns. So be sure to see mention of those on the site you choose to play at. Furthermore, it’s also critical that the casino provides self-exclusion mechanisms for players to be able to limit their access and spending at the casino until they feel ready to resume their gaming activities.

Newest Casino Bonuses for October

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Explore Latest Casinos Published on Our Site


Slot Bonuses FAQs

What are slots bonuses?

Slot bonuses are casino bonuses that are explicitly intended for online slot games.

Who can claim a slot casino bonus?

Anyone who is above the age of 18 and is otherwise also eligible for the promotional offer in question may do so. Read the bonus terms to know what is required on your part to claim the bonus (e.g., register an account, make a deposit, etc.).

What types of slots casino bonuses are there?

Slot bonuses come in various shapes and sizes. They can be offered as cash bonuses and free spins, and depending on the promotion, they may cater to new players or existing players at the online casino. Check out some of the best welcome offers for slot players here.

Are some games better than others when it comes to slots bonuses?

Some slot games have become exceptionally popular with players, and they are easier to find promotions and bonuses for. An example of a slot game that casinos often offer bonuses for is Netent’s Starburst.

How safe and fair are casino bonuses for slot games?

It all depends on the online casino offering the bonus. If you choose a safe and reliable platform with a valid license, then the promotional offers will be safe. And by assessing the bonus terms and wagering requirements, you can determine how fair they are for you.

Where can I get the best mobile slots bonuses?

We have a list of the top-rated mobile casinos with some of the most attractive promotions currently on the market.



To provide the full picture, our experts used the below listed sources at the time of writing. This list may expand as we regularly update this article. Feel free to bookmark this page for up to date information and trends on slot bonuses.

i. History of Slot Machine (

ii. A brief History of Slots (

iii. Mechanics of Slot Machines (

iv. Slot Machine Visual & Sound Effects  (

v. Gambling Income Explained (

vi. Martingale Gambling Strategy (

Author: George Mizzi
Chief Slot Analyst
When it comes to slot games, no one knows them better than our chief slot analyst George Mizzi. George started playing video slots back in 2011, and since then, he became inquisitive about all things slots. He became entrenched in the mechanics of them and quickly became an expert in how slot games work.