Best Online Casino Bonuses and Promotions 2025

This is the dream team: our 3 absolute favourite bonuses offered by online UK casinos. Enjoy! 

Who doesn’t love getting extra rewards for playing their favourite casino games? Casino bonuses are the perfect way to boost your bankroll and win real money with less risk. These bonuses come in many shapes and sized, and as always, Casino.com is here to help you make sense of it all. 

Looking for some extra insight? Our experts are here to lay out each casino bonus, presented in this handy guide to casino offers for UK players. Read about how to claim bonuses, discover tips and tricks to benefit from them, and much, much more.  

There are dozens of casino bonuses available at UK casino sites, so picking the right one for you can be a difficult task. That’s where we come in; our experts have provided some helpful tips that you can use when choosing your next casino bonus.

So, if you want to make sure you get the most from online casino bonus offers, consider these tips:

Evaluate the bonus value

When encountering a bonus, first  look at its overall value. Some casinos are generous with their bonus offers, while others are less so. Finding the best casino bonus can get you  hundreds of pounds worth of bonus funds, so always shop around to find those high-value bonuses. 

Check game limitations

Some bonuses are only usable within certain casino games. Check before you claim your casino bonus to make sure it can be claimed in your favourite game. 

Read the Terms and Conditions

 Some casinos have bonus offers that look enticing but whose outrageous T&Cs can prevent you from actually winning any real money. Always check that the wagering requirements, maximum win, and bet amounts before claiming any bonus. 

Types of Online Casino Bonuses:

In online casino reviews, bonuses are often the most crucial part – and there are always plenty of casino promotions you can claim, whether you are a new or existing player. Here are the types of bonuses you’ll likely encounter: 

Most UK online casinos offer a welcome bonus. The most common of which being the casino deposit bonus. Just make the minimum deposit and the casino will match the funds.

Some casino sites also offer a no-deposit bonus, or even free spins. To claim your welcome package, some online casinos require a bonus code, while others, ask that you opt in. Some conveniently apply the bonus credits automatically to your account once it’s fully verified or you’ve made your first deposit.  

Our Recommended Casinos:

The most common casino promotion is the deposit bonus, which you can claim when you open an account. It might only be on your first deposit, but it is also possible to claim deposit bonuses on your second, third, fourth or even fifth deposits.

Most of the time it’s a 100% matched bonus up to a specified figure, e.g., £100, but it might also be a 50% bonus of up to £500. Just remember to check the wagering requirements and which games you can use the bonus funds on.   

Our Recommended Casinos:

At some of our recommended real money online casinos you’ll find no deposit bonuses. This will either be a welcome promotion or a reload bonus – for the latter, you’ll be notified via email or phone.  

A no-deposit bonus is the holy grail of casino bonuses, because it allows you to wager real money without making a deposit. While these can be rare and difficult to find, our experts have done all the hard work for you – you can find them all on this page. Note that no deposit bonuses are only available on specified games, and their wagering requirements are higher than regular bonuses. Also, there may be a maximum win, so make sure to read the T&C.

Our Recommended Casinos:

With a cashback bonus, you can receive a stated percentage back as part of your bet. For example, you may be eligible to claim a weekly cashback bonus of 10% of any losses incurred during the week. Be sure to check whether your cashback bonus is available on the games you enjoy playing.  

Our Recommended Casinos:

The refund bonus is basically a refund on your losses, ranging from 10% - 100% of your bet. This is usually an offer for existing players which will reward you for your loyalty to the online casino. Note these casino bonuses will always be capped at a certain amount.

Our Recommended Casinos:

The free spins promotion is easily one of the most common bonuses found at online casino apps and sites. You’ll find free spins paired with a casino deposit bonus or if you’re lucky you’ll get free spins for just registering for an account and verifying it. 

You can claim a free spins bonus on popular games such as Starburst, Big Bass Bonanza or Book of Dead. There might not even be wagering requirements or a maximum win, meaning that whatever you win from the free spins is yours to keep. 

Our Recommended Casinos:

On some online casino games, you’re able to claim a specific bonus. This is often a promotion offered by game developers such as Pragmatic Play or NetEnt. This particular casino bonus can be used on everything from online slots and parlour games to table games and even live dealer games. 

When you’re be notified of this offer, usually by email or phone, just head into your account and read the on-screen instructions. This type of promotion is usually a deposit bonus but keep an eye out for no-deposit bonuses too.  

Our Recommended Casino:

At the vast majority of online casinos UK, you’re automatically enrolled on a loyalty programme. It’s totally free and will reward you every time you play real money casino games. From there you’ll collect points and progress through different levels, with every level providing its own prizes such as free spins or free bets. It’s an excellent way to play your favourite games by not wagering or making a deposit. Many online casinos also have loyalty games within like Drop & Wins titles by Pragmatic Play – just collect points and climb the leaderboard, and by the end of the month, you have a chance of winning a share of £2m.  

Our Recommended Casino:

One of the best casino bonuses offered at online casinos is the refer a friend promotion. You’ll be given a unique code which you can easily find in your casino account section. and send to your friends and family. If they sign up for an account, and in some cases if they deposit and wager a minimum amount, you’ll be rewarded. The rewards range from cash to free spins, so you can build your bankroll at no additional cost. 

Our Recommended Casino:

High rollers or VIP players are rewarded with casino bonuses not available to regular players. A high roller is an individual who places big bets, and as such has a dedicated account manager to look after their needs. As a high roller, you’ll get free bets, free spins from the online casino and even birthday and Christmas gifts.

Our Recommended Casino:

We love reload bonuses because they reward existing players as well as new ones, providing  a matched bonus on your second, third, fourth or even fifth deposit. If you’re lucky, the online casino will add free spins on top of the deal. There is a minimum amount to qualify (around £10), and the bonus amount will be specified (normally 50%- 100%) of your deposit.  

Our Recommended Casino:

A no wagering casino bonus is an online casino bonus that doesn’t require you to clear wagering requirements –. all you have to do is use your bonus once, and any winnings you receive will be available for withdrawal. As part of this process, you will forfeit your wagered bonus amount, even if you win your bet. 

For example, let’s say you receive a £10 no wagering casino bonus and place it on a hand of blackjack. You win the hand, so the casino pays out your £10 in winnings, and takes your bonus funds, leaving you with £10 in cash in your account that can be immediately withdrawn.

Our Recommended Casino:

As live casino games become increasingly popular, online casinos have begun to offer live casino bonuses. You can use these credits on all games, from roulette and blackjack to baccarat and game shows. This promotion may be offered by specific game providers such as Evolution Gaming and Pragmatic Play. 

Note that  live casino promotions are not as common as the others we have listed, and the amount you can claim is often a lot lower than that of other bonuses such as a welcome casino bonus. 

Our Recommended Casino:

Online casinos are obligated to display the rules and terms of each bonus on their websites, and it is important to read them if there are any restrictions or limitations. Here’s what you need to know:

Casino Bonus Codes

Online casino sites sometimes use casino bonus codes to offer new bonuses and promotions to their players. These codes can unlock special bonuses that include free spins, additional bonus money, no deposit bonuses, and more. These codes are only available for a limited time and are usually built around a promotion or upcoming holiday, so if you see one, make sure to claim it right away.

Protip: Make sure to opt in to receive promotional messages so you don’t miss out on any promo codes

If your casino’s bonus offer requires you to enter a bonus code, a failure to do so will result in you missing out on the promotion, so always make sure you check for a bonus code before creating your account or making a deposit.

Wagering Requirements

Wagering requirements, also known as Playthrough and Rollover, require a player to use the bonus money a certain number of times before the money is available for withdrawal. For example, if you receive a £30 Welcome Package Bonus with a 15x wagering requirement, you’ll need to make £450 worth of bets before you can withdraw.

Most online casinos offer three types of wagering requirements:

Each bonus comes with a different set of wagering requirements, so be sure to carefully read the T&C for each bonus.

Wager Percent Contribution

The games you play and the bets you make will also have a different impact on the wagering requirements. Using the above example, if you have a £450 playthrough, a £1 bet on a slot game will often be valued at £1, but a bet at the roulette table is worth much less.

Additionally, if you make a high percentage roulette bet or a bet that covers most of the table, that money won’t be counted towards your wager requirements. Game wager percent contribution can be found here. 

Time Limits 

Some casino bonuses can only be claimed if the deposit is made within a certain period of time (e.g., within 7 days). Depending on the online casino, you might be reminded to use the bonus via email or phone – however, do not rely on this, as not all casinos send a reminder. Consider setting a reminder on your smartphone or computer. 

Game Limits

The game contributions of a given bonus will be listed in the Terms and Conditions and state which games qualify for the bonus credits. Most of the time, online slots and progressive jackpots qualify, but table games and live dealer titles may only contribute 10 - 20% of the bonus funds. If you claim a free spins promotion, you can only use these on specified online slot games.

Win Limits

Besides time and game limits,  you must also consider the bonus win limits. Free spins where you do not need to make a deposit, will usually be subject to a maximum win; however, other casino bonuses (such as no deposit or welcome bonuses) might have a max win from the bonus credits.

Payment Limits

There are also times when specified payment methods are preferred or disqualified for a casino online bonus. For example, Pay by Phone casinos could give you an exclusive bonus. On the other hand, with many welcome bonuses, e-wallets are disqualified from the deal. 

A welcome bonus is a great reason to open an online casino account.

1. Choose your preferred online casino on our page.
2. Read about the welcome bonus. 
3. Read the offer's terms and conditions.
4. Understand how to claim the offer e.g. a bonus code, automatically applied.
5. Open an account and choose the bonus of your choice.
6. How to claim other bonuses.

How to claim other casino bonuses:

There are many ways to apply a claimed bonus casino offer. Most commonly it is automatically applied when you sign up for an account and make a deposit. However, you may be required to opt in for the bonus when you make a deposit or register for an account. Some bonuses also require that you input a bonus code.