The best casino bonuses give you some cash or credit to use on your favourite games. 

Most gambling websites feature a range of rewards for players and this means you might find it tough knowing what the top casino offers are. 

That’s why we’ve reviewed the UK’s finest sites and highlighted the ones with the best casino bonuses. 

All you need to do is read our guide, pick the casinos with the rewards that matter to you, then head over to the website and sign up for the bonuses. Top 15 sites for casino bonuses we’ve reviewed 

How OnlineCasinos.co.uk rates casino bonuses

Casino bonuses are simple to understand. They’re promotional rewards that casinos offer to new and returning players, so that they choose to wager on their games and not with another site.

But rating bonuses is more complicated than simply picking the highest ones. 

This is because there’s more to bonuses than just the spins or cash on offer. That’s why when we rate casino bonuses for you, we also look at these top-level issues: 

• Wagering requirements 

• Deadline for use 

• Number of deposits required 

• Any games restrictions

Below, we go into more detail about how we look at these issues: 

Wagering requirements 

This is the amount of your own cash you need to invest to get the full benefits of a casino bonus. Some rewards are subject to 35x wagering requirements, others might have none. 

However, more often than not these requirements do need to be met and it means that you might need to spend a significant amount of your own money to get your 100 free spins or £100 welcome bonus. 

We highlight the wagering requirements of a casino bonus, so you know exactly what’s expected of you when you sign up to them. 

Deadline for use 

Many casino bonuses have a deadline for use, something you need to be aware of before you sign up to a £100 bonus, 100 free spins offer or any other type of reward. 

We carry out a free spins valid check and cash bonus assessment by looking at how long you have before you have to use the reward. 

This information is included in the terms and conditions of the bonuses we highlight in our reviews and you can find this in the table at the start of this guide. 

Number of deposits required 

Cash bonuses often advertise huge deposit boosts, with some casinos offering you the chance to boost your deposit by thousands of pounds. 

However, these bonuses are often linked to a series of deposits of varying amounts which means you need to invest a large amount of your own cash to get the full amount of the reward. 

Any bonus that requires multiple deposits must make this clear in the terms and conditions of the offer. Our reviews ensure that it’s simple for you to find this information and make an informed decision about whether it’s the right offer for you. 

Any games restrictions

Casino bonuses in the UK can have a huge number of conditions attached to them and game restrictions are one of the most prominent. 

Game restrictions relate to both the specific title you can use the bonus on and how the reward can be used. These are two of the restrictions to keep in mind: 

• Only cash stakes: this means that only cash stakes qualify, so you can’t use the bonus on free games. 

• Max bet using bonus: in this scenario you can only make bets of a certain amount on your favourite casino games using bonus funds. 

We consider all these things when deciding which sites have the best casino bonuses. The key when choosing which casino bonuses to sign up for is to think about what matters most to you. 

Once you’ve done this, make sure that you check the T&Cs of any bonus to make sure it really offers what you want and expect. 

Meet our online casino experts 

Here at OnlineCasinos.co.uk, we’re honoured to have some of the gambling industry's most savvy minds, who work hard to bring you updated reviews of the best casino bonuses available. 

Combining years of experience and a passion for playing the games you love, we’re able to review online casinos like real players  — because that is exactly what we are, expert players who take pride in using our knowledge of casino games and sports betting to find and provide detailed reviews of the best casino bonuses in the United Kingdom.

Our team of experts crawl the web to find the best casino bonuses we think warrant your attention. The guides and reviews we write are fully transparent and abide by all gambling compliance rules. But that’s not all. What makes us most proud is knowing we point you in the right direction, allowing you to find the right gambling sites, and play the best games that suit your playstyle. 

Good casino bonuses backup an already stellar casino offering, but the best are unmissable and add genuine value to your playing experience. Join us as we discover the best casino bonuses on the market today and help you decide where to play. 

How do free spins work?

Free spins are the best casino bonuses for players who prefer slots games to table options. 

Free spins work by giving you casino credit to use on slots games. What you need to keep in mind is that many of the offers can only be used on specific titles. 

Wagering requirements is another key part of how free spins work. 

This is because wagering requirements are the amount of money you need to invest at a casino before you can withdraw the benefits of the bonus. 

You can find out all the information you need about how a specific free spins offer works by reading the T&Cs of the promotion. 

How do welcome bonuses work? 

Welcome bonuses are rewards casinos give to new gamblers when they create an account. 

Welcome bonuses work by giving you either free spins or cash to use at a site, with the majority of these offers being a cash promotion. 

Deposits are crucial to how welcome bonuses work. 

The reason for this is that to get the full amount advertised you’ll often need to make multiple deposits, with many casinos giving you a different deposit percentage match for the different increments. 

You can learn all you need to know about how a particular welcome offer works by reading the bonus terms and conditions of the reward you’re interested in. 

How do no deposit bonus offers work? 

Credit: Pikist

No deposit bonuses are casino rewards you earn without needing to invest your own money.

No deposit bonuses work by providing either free spins or cash to use on casino games, with most casinos offering the former. 

Deadlines are vital to how no deposit bonuses work. 

It’s so important because many casinos will give you a set amount to claim your bonus. The reason for this is that sites aim to entice people with a free offer, then payout as few as possible by making them run out shorting after players have signed up. 

Other types of online casino bonuses (high roller, 1st deposit, reload & more)

There are countless online casino bonuses advertised across the web, which makes understanding exactly what’s on offer a rather challenging ordeal. But don’t worry. In this section, we look to make things simple and clarify what you need to know. 

Here are some other types of online casino bonuses and what they’re all about: 

1st deposit bonus: a bonus offer (either cash or free spins) that’s linked to the first deposit you make to the site.

Match bonus: a match bonus is where a casino matches or exceeds your exact deposit amount, usually by 100%, 200% or 500% (which is the most you will find). 

Cashback bonus: the casino pays back any losses you incur, making this offer essentially a refund to the player, but like with deposit bonuses the casino keeps the winnings. 

Bonus code offer: accessible via code to trigger the offer. 

No wagering bonus: a rare bonus applied to your account with no wagering requirements. 

VIP bonus: this is an exclusive offer only available to certain players, which is typically tailored to your average deposit amount and playtime. 

Loyalty bonus: rewards players who use the online casino for extended periods of time. 

Referral bonus: comes on the back of a promotion from a friend or family member. 

Reload bonus: triggered after the welcome package, this works like a standard bonus and can be based around a player’s number of deposits with the casino. 

High-roller bonus: these bonuses are large, with the caveat being the clearing rates are much higher and are reserved for those playing high stakes.

Game provider bonus: based around specific game providers like NetEnt and Playtech. 

Game specific bonus: tailored to games like blackjack, poker, roulette, slots, and bingo.

There are loads of bonuses on the market and not all of them are clear. Use this guide to help define the offers that best suit your needs and playstyle. 

Dos and don’ts of casino signup bonus offers

There are some important things you should and shouldn’t do when you’re signing up for the best casino bonuses. 

Do these things when signing up for casino bonuses 

• Read the terms and conditions

• Decide if you prefer free spins or cash offers 

• Set gambling limits when using your bonuses 

Don’t do these things when signing up for casino bonuses 

• Expect to get free money from gambling sites 

• Invest more money than you’re comfortable with just to get the bonus amount 

• Create multiple accounts with sites to try and get more offers 

What are wagering requirements?

Wagering requirements are amounts of your own money that you need to wager before you can get the full rewards of a casino bonus. 

They’re represented as a multiplication of the bonus amount on offer – such as 35x – and you can find them in the terms and conditions of the bonus. 

Using the example of a £100 welcome bonus, this is how wagering requirements work:

• 10x: you need to wager £1,000 before you can withdraw the bonus  

• 20x: you need to wager £2,000 before you can withdraw the bonus  

• 30x: you need to wager £3,000 before you can withdraw the bonus  

T&C’s of casino bonuses

It’s vital that you read the T&Cs of any casino bonuses that you sign up to. 

Many sites advertise large cash of free spins offers and it’s easy to think that all you need to do is create an account and then you’ll get your reward. 

The reality is different. 

You’ll need to meet a number of different requirements, some of which may require you to invest your own money at the site to get part or all of the bonus. 

Casinos are required by law to publish the full T&Cs of any reward they promote. You’ll normally find this in the small print of the bonus. 

In addition to this, there are other requirements you can expect from casino bonuses: 

• Contributing a number of deposits 

• Making deposits in a specific period of time 

• Depositing a certain amount of cash 

So, make sure you check the wagering requirement of a bonus before you sign up. If you don’t then you might find you need to invest a large amount of money just to get a small reward. 

Most popular types of online casino bonuses

There are three main types of casino bonuses that you should look for at the best gambling websites: 

• Welcome bonuses 

• Free spins 

• No deposit bonuses 

While there are other rewards you can sign up for, these are the most popular casino bonuses. 

Online casino offers to avoid

There’s a trick to spotting online casino offers to avoid – look for the wagering requirement 

These are offers to avoid because they require you to wager large amounts of your own money before you can get the full benefits of a bonus. 

It means that if a bonus has a high wagering requirement then you might end up paying lots of your own cash to get its benefits. 

Why you should look for the best loyalty reward casino bonuses

Great introductory offers are among the most important casino bonuses you can get. You’re rewarded with cash or free spins for depositing your own money, or simply for signing up to a casino. 

But you shouldn’t only look for the bonuses that new gamblers get. 

Why? 

Because you can only get an introductory bonus once from a casino, and that might not be enough of a pull if you want to keep going back to a gambling site – this is where loyalty reward bonuses come in. 

There are two key types of loyalty reward bonuses: 

1. Casino membership 

2. Ad hoc promotions 

Many online casinos offer both these bonuses and different ones can excel for either their membership offer or their ad hoc promotions. We’ve picked out the best casino for each type of bonus. 

How to claim an online casino bonus

While every casino and the bonuses they offer are different, typically, claiming a bonus follows a simple (often standardised) process. 

Here is our general five-step guidance for claiming your online casino bonus: 

1. Register your account: create an account with your chosen online casino

2. Locate and check the terms: find and understand the stipulations

3. Trigger the bonus: claim the bonus and check it is active on your account

4. Clear the bonus: make a plan to use your bonus and maximise its value

5. Track your progress: see what you’ve cleared and how much time you have

Every bonus is different and the process may deviate from this guidance, but there should be core similarities where you can recognise and apply these tips.

Best casinos for free spins bonuses 

Slots are the most popular game at most gambling websites. This means that free spins are often the best casino bonuses offered by the top sites. 

There are a few things to consider when deciding which site has the best free spins offer:

• How many spins can you get?

• Are there any wagering requirements?

• What games can they be used on?

If quantity is what you look for then bgo is the site for you. It offers you the chance to get a huge number of free spins, more than 5x the amount of some casinos. 

If you’re happy to take a lower amount of free spins because you don’t want to have to worry about wagering requirements then PlayOJO is perfect. Its free spins have no wagering requirements, something very few sites can match. 

Best casinos for welcome bonuses

The best casino bonuses give you a chance to get cash or casino credit to play your favourite games. While free spins offer credit, welcome bonuses reward you with cash.

These are the key things to consider when deciding if a site’s welcome bonus works for you: 

• Amount of the cash offer 

• Number of deposits required to get the full reward 

• Wagering requirements of the bonus

The Grand Ivy Casino is the site that has the current best welcome bonus offer. 

You can earn a large amount of cash over the course of three deposits and the wagering requirement of the promotion is pretty competitive – it’s neither particularly high or especially low. 

Best casinos for no deposit bonuses

No deposit bonuses are casino rewards that don’t require you to make an initial investment. 

These bonuses are either free spins or a cash amount, with free spins generally the most popular choice for casinos that offer these rewards. 

These are the things to think about when choosing a no deposit bonus: 

• Is your preference for free spins or a cash reward?

• Do the bonuses have wagering requirements? 

• Can I get a bonus for referring a friend to the site?

888 Casino is the site with the best no deposit bonus, with its cash offer a considerable distance ahead of rival casinos. 

888 🥇

Credit: 888 Casino

888 casino offers the best casino bonuses for players looking for cash rewards. 

No site is able to match the combination of cash casino bonuses offered by 888. The combination of no deposit bonus and welcome bonus makes it a casino to look out for. 

Top three features of 888

• Outstanding poker games 🂡

• Very competitive payouts 💷

• Excellent live casino games 🎲

In addition to its incredible introductory bonuses, 888 has a superb loyalty rewards scheme too. It has a VIP club and membership of this gives you the chance to earn vouchers, trips abroad, and lots more rewards. 

888 is the site with the best cash casino bonuses, but that’s not the only reason we think it’s such a great place to gamble. Read our Casino 888 review to find out all the reasons we love it, or visit 888 Casino to find out for yourself.

Total bonus package of 888 Casino 💷

You can find the latest bonuses offered by 888 Casino in our table at the beginning of this article. 888 Casino regularly updates its offers and you can see how it compares to other great sites by checking out our online casinos reviews page. 

The Grand Ivy 🥈

Credit: The Grand Ivy Casino

The Grand Ivy Casino has the best casino bonuses if you’re seeking a welcome bonus. 

You get the chance to earn a welcome cash casino bonus when you sign up to The Grand Ivy Casino, along with some free spins. 

But it’s not as simple as creating an account and getting the money – there are wagering requirements you need to meet, which you can find on The Grand Ivy Casino promotions page.

Top three features of The Grand Ivy Casino 

• Lots of Microgaming titles 🎲

• Excellent for mobile gambling 📱

• Plenty of blackjack games 🃏

Though Grand Ivy Casino doesn’t offer the full package of casino bonuses, its cash welcome bonus is enough to put it into our list of the five best sites we reviewed. In addition to this, its live dealer games are also exceptional. 

Read our Grand Ivy Casino review to get more details about its rewards, then head over to the website now to check out the full bonus package you get from this great online casino.

Total bonus package of The Grand Ivy Casino 💷

You can discover the current bonuses offered by The Grand Ivy Casino in our table at the beginning of this article. The Grand Ivy Casino regularly updates its offers and we recommend you visit the site to find out what its full bonus package is right now. 

LeoVegas 🥉

Credit: LeoVegas Casino

A good free spins offer and welcome bonus is the hallmark of sites with the best casino bonuses. 

LeoVegas doesn’t have the highest bonus in either of these categories, but each of its offers compares favourably to its competitors. This makes it a great option if bonuses are an important part of your casino experience. 

Top three features of LeoVegas

• Enormous games library 🎲

• Superb for mobile gambling 📱

• Excellent baccarat selection 🃏

But it’s not only the free offers that make LeoVegas one of our top casinos. With a massive games catalogue and plenty of sports betting options, LeoVegas has something for every gambler. 

Find out all the reasons we love this site by reading our Casino LeoVegas review, or visiting LeoVegas Casino for yourself.

Total bonus package of LeoVegas Casino 💷

You can see the current bonuses offered by LeoVegas Casino in our table at the beginning of this article. LeoVegas Casino regularly updates its offers and we recommend you head to the website today and check its promotions page to see what latest bonuses the casino has to go with its welcome package.

Casimba 

Credit: Casimba Casino

Casimba Casino is one of the top sites to visit if you’re looking for the best casino bonuses. 

Sign-up bonuses is where the website really shines. It offers both free spins and a welcome bonus, with the potential cash reward for new players being a particularly good promotion. 

Top three features of Casimba Casino

• Very user-friendly website 💻

• Enormous selection of casino software providers 🎲

• Excellent app for mobile gambling 📱

You could earn some great bonuses from Casimba Casino but what really counts at a gambling site are the games. Casimba Casino excels in this category, with over 500 slots alone for you to pick from. 

Head over to Casimba Casino today and see if the best casino bonuses it has to offer are what you’re looking for. 

Total bonus package of Casimba Casino 💷

You can see the current bonuses offered by Casimba Casino in our table at the beginning of this article. Casimba Casino frequently updates its offers and we recommend you head to the website now and check its promotions page to see what loyalty schemes the casino has to go alongside its welcome bonuses. 

Playzee 

Credit: Playzee Casino

New players could earn a cash welcome reward, along with a free spins offer. 

Top three features of Playzee Casino 

• Tiered loyalty reward scheme 👫

• Zee Club Day gifts for returning players 🎁

• Large collection of slots games 🎰

The bonuses don’t stop once you’ve signed up to Playzee Casino. This is because the site has daily offers that run from Monday to Sunday, giving you a chance to earn some more rewards to use on your favourite games. 

Check out Playzee Casino now to learn more about its casino sign up offers and loyal player rewards. 

Total bonus package of Playzee Casino 💷

You can find the latest bonuses offered by Playzee Casino in our table at the beginning of this article. Playzee Casino regularly updates its offers and you can see how it compares to other great sites by checking out our homepage. 

Bgo 

Credit: bgo Casino 

Free spins are among the best casino bonuses you can get and bgo offers you the chance to win plenty of them. 

Unlike many gambling sites, bgo Casino’s offer requires you to compete against the casino to win your spins. You do this by playing its Mega Wheel. All the spins you win can then be used on the Twin Spin slots game. 

Top three features of bgo Casino 

• Impressive rewards hub 💰

• Gamified bonus offer 💸

• Lots of tournament slots 🎰

One of the other brilliant things about bgo Casino is that you can play its games on mobile, tablet, or via the website. This means you can place a bet wherever you are and whenever you want to – just remember to gamble responsibly at all times. 

Head over to bgo Casino now to find out more about why its free spins offer is one of the 

top casino bonuses we’ve seen. 

Total bonus package of bgo Casino 💷

You can find the latest bonuses offered by bgo Casino by checking out our table at the beginning of this article. bgoCasino frequently updates its offers and you can see how it compares to other top sites by checking out our latest casino bonuses page.