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300 Casino Bonus | Best Online Casinos With A 300% Deposit Bonus

Looking for sites with a 300 casino bonus? Our guide lists the best sites with this reward & answers all the questions you have about a 300% deposit bonus.

What hidden catches are there for a 300% casino bonus?

There should never be any hidden catches for any casino bonus, including a 300% one. This is because all bonuses must include full T&Cs, so that players are aware of all their requirements before signing up to them. 

Which casino sites offer a 300% deposit bonus?

Some of the UK’s best online casinos offer a 300% deposit bonus. These are often newer sites because it’s a generous offer and these casinos have to work hard to win players from their more established rivals. You can find out exactly which casino sites offer a 300% deposit bonus by using a dedicated online casino reviews site. 

OnlineCasinos.co.uk cover all the top UK gambling sites 

OnlineCasinos.co.uk is the UK’s leading online casino reviews website and we cover all of the UK’s best gambling sites. Our expert reviews team assess a range of casinos, so you can be sure that they’ve covered plenty of sites that offer the gambling experience you’re looking for. 

Casino Site

Our Rating

UK Gambling License Number

PlayOJO

10

39326

Betfred 

9.9

39544

Casimba

9.9

52894

LeoVegas

9.8

39198

bgo

9.7

39533.

Casoola

9.6

000-045235-R-324169-008.

The Grand Ivy Casino

9.4

#000-052894-R-329546-004

Coral

9.4

54743

Casino Gods

9.4

000-045235-R-324169-008

Casino Lab

9.4

45235


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OUR SCORE
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PlayOJO

New Customer Offer

For every £1 deposited, 1 Free Spin will be credited to the players account up to 50 Free Spins (on Rich Wilde and the Book of Dead). Also, after the first deposit the player can claim an additional 30 Free Spins by visiting the Kicker Section. So the player can receive a total of up to 80 free spins. Please refer to the landing page for all the details.

For every £1 deposited, 1 Free Spin will be credited.

18+ Please Gamble Responsibly. Full T&C's Apply - Click Here  BeGambleAware.org

Rate it!

Read Review
10
Casimba

18+. New players only. 1 bonus offer per player. Min. deposit £20. Max. bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds expire in 30 days, unused bonus funds will be removed. Bonus funds are 100% match up to £500 on your 1st deposit, 25% match up to £1000 on your 2nd deposit, and 50% match up to £500 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds count towards wagering contribution.

Terms apply BeGambleAware.org

Rate it!

Read Review
9.9
LeoVegas Casino


Full T&Cs apply. New players only across two deposits. Cash rewards 7 days from registration to opt-in from “Promotions” page & each with 7 days wagering. Deposit £10, £25 or £50 & wager 35x. Only cash stakes qualify & wagering contributions vary. 10 free spins worth £0.10 to be claimed within Book of Dead with each qualifying deposit, 3 day expiry. 18+ BeGambleAware.org

Rate it!

Read Review
9.8
bgo

Marketing message:

**UK only. Win up to 500 spins from Mega Wheel on 1st deposit. 24-hour expiry. Max bet £2.50, Max Spins win £8 per 10 spins, Max Bonus win £150, selected games & 65x wagering on winnings. Min deposit £10. No Neteller/Skrill. Full T&Cs apply. Full T&Cs apply.BeGambleAware.org.

Rate it!

Read Review
9.7
Casoola

18+. New players only.

£10 min deposit. £5 max bet using bonus. 40 x wagering applies. Bonus valid for 14 days. 20 Spins on preselected games will be credited instantly + then 20 per day for 9 days. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Skrill + Neteller excluded. Always refer to Bonus Terms.

T&Cs apply.

Rate it!
9.6
The Grand Ivy

18+. New players only.

One bonus offer per player. Minimum deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. Bonus funds are 100% match up to £300 on your 1st deposit, 25% match up to £800 on your 2nd deposit, and 50% match up to £400 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements.

Terms apply. BeGambleAware.org.

Rate it!

Read Review
9.4
Casino Gods

18+. New players only.

£10 min deposit. £5 max bet using bonus. 40 x wagering applies. Bonus valid for 14 days. 30 Spins on pre-selected games will be credited instantly + then 30 per day for 9 days. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Skrill + Neteller excluded. Always refer to Bonus Terms.

T&Cs apply.

Rate it!
9.4
Casino Lab

18+. New players only. 

18+ Full T&C's Apply. New players Only. £10 min deposit. £5 max bet using bonus. 60x (40x referred player) wagering applies. Bonus valid for 14 days. 30 Spins on Starburst will be credited instantly + then 30 per day for 9 days. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Ewallets excluded.

T&Cs applyBeGambleAware.org

Rate it!

Read Review
9.4

New Customer Offer

For every £1 deposited, 1 Free Spin will be credited to the players account up to 50 Free Spins (on Rich Wilde and the Book of Dead). Also, after the first deposit the player can claim an additional 30 Free Spins by visiting the Kicker Section. So the player can receive a total of up to 80 free spins. Please refer to the landing page for all the details.

For every £1 deposited, 1 Free Spin will be credited.

18+ Please Gamble Responsibly. Full T&C's Apply - Click Here  BeGambleAware.org

Our Score
10
Our Score

18+. New players only. 1 bonus offer per player. Min. deposit £20. Max. bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds expire in 30 days, unused bonus funds will be removed. Bonus funds are 100% match up to £500 on your 1st deposit, 25% match up to £1000 on your 2nd deposit, and 50% match up to £500 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds count towards wagering contribution.

Terms apply BeGambleAware.org

Our Score
9.9
Our Score


Full T&Cs apply. New players only across two deposits. Cash rewards 7 days from registration to opt-in from “Promotions” page & each with 7 days wagering. Deposit £10, £25 or £50 & wager 35x. Only cash stakes qualify & wagering contributions vary. 10 free spins worth £0.10 to be claimed within Book of Dead with each qualifying deposit, 3 day expiry. 18+ BeGambleAware.org

Our Score
9.8
Our Score

Marketing message:

**UK only. Win up to 500 spins from Mega Wheel on 1st deposit. 24-hour expiry. Max bet £2.50, Max Spins win £8 per 10 spins, Max Bonus win £150, selected games & 65x wagering on winnings. Min deposit £10. No Neteller/Skrill. Full T&Cs apply. Full T&Cs apply.BeGambleAware.org.

Our Score
9.7
Our Score

18+. New players only.

£10 min deposit. £5 max bet using bonus. 40 x wagering applies. Bonus valid for 14 days. 20 Spins on preselected games will be credited instantly + then 20 per day for 9 days. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Skrill + Neteller excluded. Always refer to Bonus Terms.

T&Cs apply.

Our Score
9.6
Our Score

18+. New players only.

One bonus offer per player. Minimum deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. Bonus funds are 100% match up to £300 on your 1st deposit, 25% match up to £800 on your 2nd deposit, and 50% match up to £400 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements.

Terms apply. BeGambleAware.org.

Our Score
9.4
Our Score

18+. New players only.

£10 min deposit. £5 max bet using bonus. 40 x wagering applies. Bonus valid for 14 days. 30 Spins on pre-selected games will be credited instantly + then 30 per day for 9 days. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Skrill + Neteller excluded. Always refer to Bonus Terms.

T&Cs apply.

Our Score
9.4
Our Score

18+. New players only. 

18+ Full T&C's Apply. New players Only. £10 min deposit. £5 max bet using bonus. 60x (40x referred player) wagering applies. Bonus valid for 14 days. 30 Spins on Starburst will be credited instantly + then 30 per day for 9 days. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Ewallets excluded.

T&Cs applyBeGambleAware.org

Our Score
9.4
Our Score
Advertiser Disclosure

The purpose of this website is to offer consumers a comparison platform for products to determine their suitability for consumer needs. This service is provided free of charge as a result of advertising contributions from the companies whose products are represented here. Based on the advertising compensation amount, the placement and rating of individual products may differ. These placement decisions are also made by considering user experience, review findings, conversion rates, and product popularity. While we work hard to provide a comprehensive and transparent comparison of market offerings, we do not guarantee the inclusion of all relevant or competing products in every market segment.

Understood!

300 Casino Bonus

10 poker chips rest on a table against a brown background

A 300 casino bonus gives you a chance to boost your betting funds by making a deposit to your gambling account. 

It’s a generous reward that can turn a £100 deposit into a £400 balance to use on your favourite games but you should only sign up for this bonus if you can afford to — never bet beyond your means and always gamble responsibly. 

We’ve explained everything you need to know about a 300% deposit match bonus, including: 

  • What it is 

  • Why you should choose it

  • When you shouldn’t choose it

  • Which sites offer it

We’ve done the hard work of answering all your questions about 300 casino bonuses. All you have to do is read our tips and then pick the online casinos you want to sign up for. 

How we review the top 300 casino bonus sites 

OnlineCasinos.co.uk uses the same reviews process for every gambling site we cover, whether it’s a live dealer casino or a 300 casino bonus site. 

Our process is all about making detailed assessments of the UK’s top casinos, delving deep into the site and tackling all the questions you have about it. These are some of the key questions we answer in our reviews: 

  • Are their bonuses available to new and returning players?

  • Does the site have a diverse selection of great games? 

  • Can you use the casino on all of your devices? 

  • Do you get good payouts from the games? 

  • What are the sports betting options like? 

These are just some of the things we cover. 

You can find out all of the questions we answer for you by checking out the sites featured in our online casino reviews page. We’ve assessed some of the UK’s top sites, giving you a wide range of great casinos to choose from.  

Meet the OnlineCasinos.co.uk team of gambling experts 

OnlineCasinos.co.uk has an experienced team of gambling experts who write our casino reviews and games guides. 

Our team members are passionate, educated and fair. They interrogate an online casino as both a fan and an expert, looking for all the things they want as both casino game players and gambling industry competitors. 

This means each and every one of their reviews provides the detail you need, care you deserve and accuracy you demand when searching for an assessment of the sites offering a 300 casino bonus. 

Safety and security at 300 casino bonus sites 

Nothing is more important to us than your safety when you’re betting at a UK casino. 

Online casinos require you to supply them with some of your most sensitive information, including proof of identity (like your passport) and address (such as your electricity bill). 

Safety and security is such a serious issue for OnlineCasinos.co.uk that we carry out a trustworthiness check on a gambling site before we’re prepared to review it. We conduct this check by looking for the icons of the following gambling regulators on the casino’s website: 

These regulatory bodies control online casinos and possess the power to fine, suspend or even close them down. Seeing their icons on a casino site means we can be sure they’re safe and secure, meaning you can trust them to look after your information and money. 

How to play games at sites that offer a 300% casino bonus 

Online casinos are nothing without games. 

Casino games are the things that test your skills, provide you with entertainment and offer you the opportunity to earn some cash — if you’re fortunate enough to have a winning gambling session. 

We want you to have the best possible experience when using a gambling site. That’s why we’ve given you some tips on how to play the three most popular casino games you’ll find at sites that offer a 300% casino bonus: 

Slots 

The main thing to know about slots is that the games are based purely on chance. Each game uses a random number generator (RNG) to ensure its results can’t be predicted. 

This means you should play slots games in the following ways: 

  • Review the range of slot types (such as progressive slots) available to you 

  • Decide how much you’re going to bet and then stick to your limits 

  • Pick games you like and not ones you think are tight or loose 

Roulette 

Perhaps the most important detail to be aware of with roulette is that there are two key types, American roulette and European roulette

The main point of separation between the two is that American roulette has two green zeros on the wheel, while European roulette has one. This impacts your odds of winning because it means the two variants have the following house edge: 

  • House edge in American roulette: 5.26% 

  • House edge in European roulette: 2.30%

With this in mind, our main tip for how to play roulette is that you decide which version of the game you want to play and then read up on the main roulette betting strategies you can use. 

Blackjack 

Blackjack is arguably the most popular casino card game on the planet. And you can understand why. It’s fast-paced, pits you against a dealer and has a strategic element that’s missing from many casino games. 

We believe these are the key things to work on when seeking to finesse how you play blackjack: 

Casino bonuses to look for at the top gambling sites 

Casino bonuses shouldn’t be the main reason you pick a gambling site — that should be the games it offers. 

But bonuses do matter and the reason for this is that they offer the chance to earn some free plays on your favourite casino games. 

Every major UK gambling site will offer bonuses to both new and returning players. And while there are plenty of rewards you can choose from, these are the main casino bonuses to look for: 

Cash welcome bonus

Cash welcome bonuses are geared towards you earning some extra money based on the funds you deposit to your casino account. These rewards can require you to make multiple deposits to get the full value of the offer, so check the full terms and conditions before you sign up. 

Free spins 

Free spins are all about slot games. You spin the reel when you play slot games, which means that free spins are really free plays on slot games. A key thing to be aware of with free spins is that they may only be available for certain games, so read the T&Cs before you commit to a reward. 

No deposit bonus

You’re unlikely to find a more generous offer than a no deposit bonus. Why? Because unlike other rewards it doesn’t ask you to deposit any of your own money to get the benefits of the offer. What this means is that you won’t find too many sites offering this reward, which is why we’ve done the hard work for you and highlighted the best no deposit bonus casinos

What is a 300 per cent deposit bonus?

While a 300 per cent deposit is big there’s not a lot of clever number-crunching that’s needed to understand what it is. Put simply, a 300% deposit bonus is a reward that allows you to boost your deposit by 3x. 

Using the example of a £200 welcome bonus, this is what a 300% deposit looks like: 

  • You deposit £200 into your casino account

  • You get £600 from the gambling site 

  • You end up with £800 in your account 

Reasons to choose a 300% match deposit bonus

The reasons for choosing a 300% match deposit bonus are pretty straightforward, as we explain in our question to you below: 

  • Do you want to get a cash boost when making a deposit to your casino account? If you do, this is a reason to choose a 300% deposit bonus 

  • Do you want to have more money to be able to play more casino games? If the answer is yes, it’s a reason to opt for a 300% casino bonus 

But we shouldn’t only focus on the positives here because there is an important aspect to a 300% match deposit bonus that could make it a negative. What’s this aspect? It could test your capacity to gamble responsibly. 

The obvious reason a 300% casino bonus is a responsible gambling challenge is that it asks you to deposit money to earn cash. This means you may wager more of your money than you should. 

Our recommendation is that you think long and hard about how much cash you can wager. 

If you can afford to invest the amount of money required to get a 300% match deposit bonus then it might (we’re not saying it definitely is) be something you want to do. But if you can’t afford to invest the necessary funds then it’s certainly a bad idea, as you won’t be gambling responsibly. 

How to claim a 300% bonus?

Gambling sites want it to be easy for you to claim bonuses because they want you to spend the money you get from them on their games. 

This is why the process of claiming a 300% bonus is generally pretty straightforward and often follows a variation of the steps underneath: 

  • Find a site offering a 300% bonus 

  • Read the T&Cs for the reward 

  • Make the necessary deposit(s)

  • Get the money paid into your casino account 

Of course, each online casino is different, so it may be that the process is a little different to the one we’ve outlined above. But you should expect the necessary steps you take to get your 300% deposit bonus to be pretty close to those we’ve highlighted. 

Bonus terms and conditions

Every single UK casino must display its terms and conditions. It’s not a ‘nice to have’ feature, it’s a legal requirement imposed by the Gambling Commission. If a bonus doesn’t display its terms and conditions then it’s not meeting its obligations and you shouldn’t sign up for it. 

T&Cs are a legal requirement because gambling regulators demand that players know exactly what they’re signing up for with a casino bonus. These are some of the things covered in the T&Cs of a bonus offer: 

  • Any limits on bonus spins winnings credited to you

  • What the minimum deposit is 

  • When the 1st deposit must be made 

  • What maximum bonus amount is 

Gambling sites can’t reel in players, get their commitment to an offer and then hit them with hurdles that result in the bonus not being what was promised. The T&Cs need to clearly state exactly what’s required from players and precisely what they get. 

You can find the T&Cs marked clearly on a casino bonus. To get an example of this, head to the table at the top of this guide. We’ve made it easy for you to locate the T&Cs for every bonus mentioned. 

Banking options at online casinos

Banking options could easily be an afterthought when selecting the gambling sites you make your wagers at. 

You take it as a given that an online casino will allow you to make deposits and withdrawals in the banking method of your choice. This is often a fair assumption because most casinos offer the following banking options: 

  • VISA

  • PayPal

  • Neteller

  • Skrill

  • paysafecard

  • ecoPayz

  • Maestro

  • Fast Bank Transfer

  • DIRECT ebanking

  • Citadel Instant Banking

  • Solo/Switch

But the reason banking options are something you shouldn’t overlook is that once you’ve picked your deposit method you’ll have to accept making withdrawals in the same way. This is because online casinos generally insist that their players use the same deposit and withdrawal method. 

So, think carefully about your banking options and choose the method you’ll be happy using in the long term. 

Why do online casinos offer a 300% first deposit bonus?

Online casinos offer 300% first deposit bonuses because it makes them stand out from rival gambling sites. 

Standing out from the competition is important in the online casino industry because many sites offer very similar features to their players. Lots of casinos offer the same games and sports, so to attract new players they have to provide different benefits. 

A 300% first deposit bonus can be a real benefit to players because it gives them more money to spend on their favourite games. This means that offering it could be the difference between a player choosing one site or another. 

Is a 300 first deposit bonus worth it?

A 300 first deposit bonus can be worth it if you want extra cash to use on casino games, are prepared to deposit some extra money to get this and can afford to do so. If all these things are true for you then it might be worth exploring a 300 first deposit bonus. 

However, a 300 first deposit bonus isn’t worth it if you can’t afford to make the additional deposit required to get the extra cash available as part of the reward. If this is true for you then you should gamble responsibly by avoiding a 300 first deposit bonus. 

What are casino wagering requirements & how do they work?

Wagering requirements are something you need to know about if you’re thinking of signing up for bonuses at online casinos. Why? Because they’re the amount of your own money you need to wager to be able to withdraw the winnings you make using bonus funds. 

Wagering requirements are represented as a numerical value followed by an x. These two things represent the number of times you need to wager the amount of the bonus.

Below, we explain how wagering requirements work by using the example of a £100 cash welcome bonus: 

  • 10x wagering requirement: you need to wager £1,000 to get your bonus winnings 

  • 30x wagering requirement: you need to wager £3,000 to get your bonus winnings 

  • 50x wagering requirement: you need to wager £5,000 to get your bonus winnings 

Can I withdraw from a 300 first deposit bonus?

You can withdraw your winnings from a 300 first deposit. To collect your winnings from a 300 casino bonus you’ll need to meet the terms and conditions of the reward. 

These are some of the things that might be included in the T&Cs:

  • Games you’ve used your bonus funds on 

  • Deadline for making your deposit 

  • Wagering requirements 

You can find the full T&Cs advertised clearly on the bonus, as online casinos must publish this by law. 

Where can I get a 300% first deposit bonus?

You can get a 300% first deposit bonus from leading UK online casinos, like the ones we’ve highlighted in this guide. However, what you should keep in mind is that not all gambling sites offer this reward because it’s a generous offer. 

The generous nature of 300% deposit bonuses means that it can be tricky and time-consuming to find the specific sites that offer this reward. That’s why we’ve taken the time to find the sites that do offer this bonus, so all you have to do is pick the sites you like best and then sign up for an account with them. 

3 best casinos for 300% bonuses

There are lots of great online casinos for UK players and some of the very best offer 300% bonuses to their new players. We’ve highlighted the three top sites that have been known to offer a 300 casino bonus — visit the sites to check what their current bonus offers are. 

Casimba Casino

Casimba casino is a top gambling site that has been known to offer a 300 casino bonus

Credit: Casimba Casino 

Casimba Casino is one of the top online casinos for UK players. It has an enormous range of games, super user-friendly websites and has been known to offer a range of bonuses. Casimba Casino is a fine choice for UK gambling fans. 

These are the three things you’ll like most about Casimba Casino. 

  • Pick from a massive selection of casino software providers 

  • Huge games library with plenty of new titles available  

  • Really easy-to-use on all of your devices 

Casino rating: ⭐⭐⭐⭐⭐

Read our Casimba Casino review to learn more about this ace gambling site. 

PlayOJO Casino

PlayOJO casino is a top gambling site that has been known to offer a 300 casino bonus

Credit: PlayOJO Casino

PlayOJO Casino is a great site for players who are interested in casino bonuses. The reason for this is that the site advertises itself as a no wagering casino. This means that you don’t need to wager your own cash to withdraw your bonus winnings.  

These are the three finest things about PlayOJO Casino: 

  • Superb selection of live casino games 

  • Massive and diverse games library 

  • Ace app for mobile gambling 

Casino rating: ⭐⭐⭐⭐⭐

Check out our PlayOJO Casino review to find out all the other great things about this casino. 

bgo Casino

bgo casino is a top gambling site that has been known to offer a 300 casino bonus

Credit: bgo Casino

If you like to play the slots and try your luck at bingo games then bgo is the place for you to cast your bets. It has loads of slots titles, plenty of bingo games and a fine selection of bonuses for new and loyal players. 

These are the best three things about bgo Casino: 

  • Daily slots tournaments 

  • Lots of casino games

  • Secure payments 

Casino rating: ⭐⭐⭐⭐⭐

Cast your eyes over our bgo Casino review to discover the other top things about this site.


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