Online Casino Bonus offers everything you need to know about the online casinos that are trending in 2021. Here you will find extensive reviews for the currently popular casinos with all their advantages and disadvantages; an overview of the best and biggest bonuses, as well as a guide that can help you win a big jackpot at online casinos.

Choose your casino bonus

When choosing a casino bonus at onlinecasinobonus.bet there are several important things to take into consideration. Some people only focus on big bonuses, but there are also those who need small bonuses because they don’t play often. However, the size of the bonus is the most important and that is why you can find bonuses from €50 to €1750.

Best Online Bonuses for 2021
N/A
Bonus Code
Minimum deposit €15
Maximum deposit €100
Wagering requirements: x40
25 Free Spins on Book of Dead slot
T&Cs Apply
T&C apply
N/A
Bonus Code
Minimum deposit: €10/€15
Maximum deposit: €300/€450
Wagering requirements: x35
150 FS on selected slots
T&Cs Apply
T&Cs Apply
N/A
Bonus Code
Bonus package for the first 4 deposits
Minimum amount: 5mBTC
Maximum amount: 1 BTC - 3 BTC
Wagering requirements: x40
T&Cs Apply
T&Cs apply
N/A
Bonus Code
Minimum deposit: €1
Maximum deposit: €300
Wagering requirements: x50
T&Cs Apply
T&Cs apply
BETWINNERCODE
Bonus Code
Minimum deposit: €1
Maximum deposit: €300
Wagering requirements: x28
T&Cs Apply
T&Cs Apply
N/A
Bonus Code
Minimum deposit: €20
Maximum deposit: €400
Wagering requirements: x40
200 FS on Age of the Gods slots
T&Cs Apply
T&Cs Apply
N/A
Bonus Code
Minimum deposit: 5mBTC
T&Cs Apply
T&Cs Apply
BONUS100
Bonus Code
Minimum deposit: €20
Maximum deposit: €300
Wagering requirements: x40
T&Cs Apply
T&Cs Apply
BIG2 - BIG3 - BIG4
Bonus Code
Minimum deposit: €10
Maximum deposit: €200/€300
Wagering requirements: x30
200 Free Spins on Starburst or Fruit Zen
T&Cs Apply
T&Cs Apply
N/A
Bonus Code
Minimum deposit: €10
Maximum deposit: €350
Wagering requirements: x40
290 wager-free spins on Aztec Sun: Hold and Win
T&Cs Apply
T&Cs Apply
N/A
Bonus Code
Minimum deposit: €5
Maximum deposit: €200
Wagering requirements: x15
T&Cs Apply
T&Cs Apply
N/A
Bonus Code
Minimum deposit: €10
Maximum deposit: €300
Wagering requirements: x15
T&Cs Apply
T&Cs Apply

Choosing online casino

When choosing an online casino, it is very important to focus on the following:

  • Does it have a license?
  • Does it offer a big casino bonus?
  • How big are the jackpots?
  • Does it have a large selection of games?
  • What is their customer support like?

Onlinecasinobonus.bet has the answers to these questions, providing you with extensive reviews of all the best licensed online casinos. It offers an objective view and covers the best casinos in 2021. By offering an objective opinion, you have a detailed overview of the casinos, their offers and how popular are at the moment.

Best Online Casinos for 2021
100% up to 100€

minimum deposit amount: 10€

17 games
5.0 rating
5.0
T&Cs Apply
Terms and conditions apply for registration and bonus offers
100% up to 300€

minimum deposit amount: 1€

16 games
5.0 rating
5.0
T&Cs Apply
Terms and conditions apply for registration and bonus offers
up to 1000€ + 200 free spins

minimum deposit amount: 10€ - 1st to 4th deposit

25 games
5.0 rating
5.0
T&Cs Apply
Terms and conditions apply for registration and bonus offers
100% up to 300€

minimum deposit amount: 20€

25 games
4.8 rating
4.8
T&Cs Apply
Terms and conditions apply for registration and bonus offers
100% up to 100€

minimum deposit amount: 10€
maximum deposit amount: 100€

2 games
4.8 rating
4.8
T&Cs Apply
Terms and conditions apply for registration and bonus offers
1500€ + 150 free spins

minimum deposit amount: 10€ - 1st deposit
minimum deposit amount: 15€ - 2nd to 4th deposit

19 games
4.8 rating
4.8
T&Cs Apply
Terms and conditions apply for registration and bonus offers
100% up to 300€

minimum deposit amount: 1€

24 games
4.5 rating
4.5
T&Cs Apply
Terms and conditions apply for registration and bonus offers
100% up to 300€

minimum deposit amount: 10€

3 games
4.5 rating
4.5
T&Cs Apply
Terms and conditions apply for registration and bonus offers

Only licensed online casinos

As we have already mentioned, at Onlinecasinobonus.bet you can find reviews only for already well-established and licensed online casinos. In order for a casino to be listed and reviewed on our website, has to have a valid gaming licence. We do not recommend playing at non-licensed online casinos, even if they have big bonuses.

When playing at online casinos that are licensed and approved by a Gaming Authority, you gain certain rights. You won’t have those rights if playing in another casino. Besides, you enjoy rights that comply with state-guaranteed laws and regulations. And more importantly, you enjoy the right to bonuses, support, and much more.

How big is the biggest casino bonus

The online casinos have different types of bonuses for the new players. Some offer bonuses only to the first deposit, and some have the so-called welcome packages, which are bonuses to the first four or five deposits.

The maximum bonus you can get at online casinos reviewed by the Online Casino Bonus is part of the welcome package that MELbet offers. The maximum amount of the bonus is €1750 plus they added 290 wager-free spins.

As there are few online casinos that focus more on cryptocurrencies, we reviewed some of them as well. For the players that use bitcoins as a payment method, the biggest welcome bonus offered at the moment is by 1xBit. The maximum bonus offered by them is 7 BTC, divided between the first 4 deposits.

In addition, all casinos at onlinecasinobonus.bet do not only offer one-time bonuses but also offer extra bonuses, free spins, cashback and many other things. As a new casino player, you will have a large selection of casino games as well as other games that many of the casinos included in their offer.

Different types of casino bonuses

Every online casino offers some kind of bonus to its existing players or offers something to attract new players. Here is a list of the types of bonuses the online casinos usually have in their offer, as well as some explanations of what each bonus is.

Welcome Bonus: This is the type of bonus that most online casinos offer to attract new players. The welcome bonus can be different. Sometimes is a bonus to the first deposit or a combination of bonuses on the first four deposits. Very often, the welcome package includes free spins as well. It is very rare that any casino offers a bonus just by registering, but it is also an option.

Free spins: New and regular users often get free spins with a certain value that you can use on certain slots. This bonus actually gives the players the opportunity to win without betting money.

No deposit bonus: In most cases, the only thing required in order to get a bonus is to register and activate your account. Once that is done, that bonus is credited to your account and you can use it to play.

Deposit bonus: This is a bonus that you usually get when you first join the online casino and make your first deposit. The most common type of deposit bonus is the 100% match to your first deposit. For example, if you deposit € 1,000 you get another € 1,000 bonus so you will have € 2,000 available to play.

Reload bonus: This is the bonus that some online casinos offer when you make more than one deposit. This means that once you have spent the funds of your first deposit and decide to make another deposit, you can get a bonus on your second deposit (in some casinos even for the third and fourth deposits).

Loyalty bonus: This is a casino loyalty bonus or program. Usually, there are levels that you need to reach and that depends on how often you play and how much you deposit. The more active you are, the more points you collect that count towards the next loyalty level.

Point bonus: With this type of bonus you get points. At many online casinos, you get points for playing that you can exchange for money or for some free spins, ticket etc.

Mobile bonus: Some casinos offer a separate bonus for players that download the mobile app of the online casino. You get a bonus in the form of free spins and extra money that you can play with.

Bonus terms and conditions

When you receive a bonus, there are always rules and conditions that you must adhere to. The reason for that is to prevent abuse by individual users. For example, you open 50 different user accounts and get a €50 bonus on each. As a result, you only get one bonus regardless of the number of different accounts you open.

There are also conditions regarding how to use the bonus and more importantly, requirements you must meet before you can even withdraw the funds. These requirements always require to play the bonus amount a specific number of times on casino games. For the full list of conditions and requirements, it is best to check the FAQ section of the online casino.

Slot Games

The bonuses we mentioned above are great especially if you are a slot games fan. This is because when wagering the bonus in order to meet the requirements, the slot games always contribute 100%. It is the same in every online casino. So, even if you are not a fan of slot games, knowing a few things about them is a good thing if you are considering registering at some online casino. At least to be able to meet the wagering requirements faster.

There are many different types of slot games. You can categorize them by the number of reels, by the number of paylines, by bonus features etc. For example, when it comes to the number of reels, the slot games can have 3 reels (the classic fruit slots), 5 reels (most modern video slots), 6 reels or 7 reels giving much more winning chance. By the number of paylines, slots can go from 9 to 100.000 ways to win. These new slots with more than 243 ways to win are called Megaways. The slots can also be categorized by bonus features, there are slots that only have Wild and Scatter symbols, but also slots with progressive jackpots, free spins and many other prizes.

So, if you really want to start playing the slots online, we recommend you to read our slot games page, where you can find more in-depth information.