Top 22 US Slots Bonuses in 2021 → [Definitive List]


Slot machines are among the most popular types of games in the United States’s gambling industry, with more players interested in them than ever. They attract gamers thanks to their appealing designs, unique features, and even classic layouts that remind players of the ones in land-based casinos. Playing slot machines online, however, comes with an extra perk – slot bonuses. Find out everything about how an online slots bonus works, which ones are the best, and how to get them!

What are online slots and how to pick the best one

Online slots are the virtual version of the well-known slot machines you can find in physical casinos. They run on a Random Number Generator which randomly places symbols on a number of paylines starting from 1 to 3125 ways to win. The gameboard can have 3 to 7 reels, but some newer products have special features which can unlock more reels.

The online slot machines come with a wide variety of styles and looks, from classic to the most innovative ones, with simple gameplays or packed with features.

In July 2020, a total of 1,140,743 slot machines existed in the world, and their number is only increasing. They come with various designs and themes that cater to all types of players, from the most classic and traditional ones to modern and innovative kinds.

How to choose the perfect slot machine

How to choose the perfect slot machine


With so many options at hand, it may be challenging to decide which one is better. The most important thing that matters when making your choice is, of course, your preference. Start by determining what type of game you would like to play and if you would like a classic or a modern-looking one. Once that is out of the way, here is what you should pay attention to:

  • Special features – these are a lot of fun and can keep you entertained for a long time, so make sure your chosen slot machine comes with at least one of these;
  • Bet limits – depending on your playing style, check the minimum and maximum bet you can make in the game. If you are a high roller, look for one that allows a bigger bet, and if you are just starting, check out the lowest sum you can wager;
  • Jackpots – jackpot slots are very popular among United States players. These may come with progressive jackpots, which constantly increase until someone wins them, or fixed jackpots that simply reset to the same amount after a players wins. You can land such a jackpot on any spin, regardless of the wager amount or time you have been playing the slot;
  • Gamble feature – this is a classic feature that has been around for a long time. It allows you to gamble the winnings you have obtained from a combination of symbols and either double it or lose it. It is an excellent feature to have, even if you are not going to use it every time;
  • RTP – Return to Player is a figure that shows what percentage of the wagered money is returned to the player over a long period of time. Games with a higher RTP will, in time, give back more money than those with a lower RTP. Therefore, it is always good to choose one with a higher percentage.

Be aware: A slot machine’s RTP does not apply to every spin. It is calculated over tens or hundreds of thousands of spins. Therefore, a 99% RTP does not mean you will get back $99 out of $100. You can make more than that or lose it all!

Important: Progressive Jackpot slots are high volatility games. This means that, over a period of time, they give out fewer but bigger wins. Their counterparts are low volatility slots, which involve a lower risk by giving out smaller wins over time.

What is an online slot bonus and how to claim it

What is an online slot bonus and how to claim it

An online slot bonus is a type of promotion created by casinos that can only be used in slot machines. Casinos have three types of such deals:

  1. Usable on any slot machine on the platform;
  2. Usable on a series of slots or the slots created by a specific software provider;
  3. Usable on one slot machine only or one of two choices.

Regardless of which type you prefer if you already have a favourite, know that they are all lucrative and fun to use. They give you the opportunity to find new slots to enjoy, have fun playing your beloved titles, or discover a new software provider which caters to your needs and desires.

Slots bonuses can consist of money, extra rounds, or both, and they come in different forms such as:

  • No deposit deals;
  • First deposit bonus;
  • Welcome package;
  • Temporary or recurring promotions;
  • Deals received from a VIP program or tournament.

New players will often start with the no deposit deals and move on to deposit bonus slots or a welcome package that extends over two or more deposits. The existing players of a platform can enjoy promotions such as the temporary or recurring ones and the ones they get from being part of the VIP program or participating in a tournament.

Quick guide on how to claim a slots bonus

Quick guide on how to claim a slots bonus

A slots bonus is only different from other types of promotions because it can only be used on slot machines. The claiming process is the same as for any other deals you may claim. Here is a simple guide to benefitting from such offer:

  1. Register an account with the online casino;
  2. If the promotion comes with a code, use it either when registering or when making a deposit;
  3. Check the list of games that are excluded from the promotion and pick any other slot machine available on the website or, if the bonus only works on a specific game, open it and start playing!

Tips: If you prefer to have more options to use your bonus on, pick promotions that are not tied to a single game!

Be aware: Pay attention to the promotion’s code and read the instructions on how to use it! You can type the code in either during registration or during payment if the promotion is credited upon deposit. Make sure you write the code exactly as it is displayed, or copy and paste it into the respective text box!

Important: If you perform the KYC right after registration, the cashing out process will be a lot quicker after using the promotion.

Types of slot bonuses you can find here

On this page, you will find a variety of promotions hand-picked by our gaming experts. They are designed for new players, and they include no deposit deals, extra spins, first deposit bonuses, and welcome packages.

Our team of experts provides you with a full range of information in each deal’s description. By reading it, you will find what the promotion offers, how to get it, what its rules of use are, and even some pros and cons. Aside from these, we also give you some insight on the casino that offers the promotion, but if you want to know more about it, you should check out the review. There, we expose in detail everything the platform has in store for you and everything it lacks.

By clicking on the Details button on each offer, you gain even more insight into the promotions. We will present you with information such as:

  1. The software providers available and on which games’ you can use the promotion;
  2. The payment methods you can use to claim the bonus;
  3. All the game types the offer can be used on;
  4. Date from which the promotion becomes available and date on which it expires;
  5. The minimum deposit required for the deal.

For a smoother navigation and to save you more time, we put at your disposal filters at the top of the page. With their help, you can sort the bonuses to quickly find what you are looking for in categories like:

  • New casino – here, you will find slot bonuses from new casinos in the industry;
  • Lastest added – use it to browse newly added promotions every day;
  • No deposit – only shows promotions that are credited right after registration, with no need to make a payment;
  • No wagering – shows only bonuses that have no wagering requirements;
  • Cashback – displays cashback bonuses that can be used on slot machines.

Also, check out our collection of best welcome bonus slots for more promotions created especially for new players. They come with both spins and money so that they may be the perfect match to a great slot machine.

Important: Always read the Terms and Conditions and Bonus Rules yourself as well! Casinos may change them as they please, at any moment. We do our best to keep every offer up to date, but modifications can appear at any time, and it is better to check before claiming a deal!

Top slot machine software providers in the United States

Top slot machine software providers in the United States

#Software ProviderNumber of gamesYear LaunchedMost popular slots
1MicrogamingOver 1,5001994Mega Moolah, Immortal Romance, Break Da Bank
2NetEntOver 2001996Twin Spin, Gonzo’s Quest, Mega Fortune, Starburst
3PlaytechOver 6001999Desert Treasure, Top Gun, American Dad, Nostradamus
4International Game Technology (IGT)Over 1501981Wheel of Fortune, Da Vinci Diamonds, Cleopatra Slots
5BetsoftOver 1301999A Night in Paris, Good Girl Bad Girl

This table contains five of the most prolific and popular software developers in the online gambling industry. Their game collections include a variety of products, but the majority of them are slot machines. The games they create are so great that players in the United States and all around the world look for them when choosing new casinos to play at. Therefore, gambling platforms create promotions especially for their games to attract new customers.

Almost any gamer has played at least one of their games. If you have not, this table is an excellent place to start, as you will be playing some of the most popular slots in the industry. Their titles come with a multitude of different themes and features. Besides, they launch new products almost every month, so you will not have enough time to get bored of their catalogue.

The best slot sites in US

Variety is great, but having too many choices may leave you more confused than satisfied. There are hundreds of slot sites in the US, and we are here to help you choose the best one for you. To start with, you should know that the platforms presented on our website are thoroughly verified and tested by our team of gaming experts. Therefore, they are all legit, feature-packed, and focused on giving each player a good experience. But here are some suggestions of the best slot sites you might want to check out.

Top 3 NetEnt Casinos

#Casino NameNetEnt SlotsSlots Bonuses Available
1VideoSlots Casino140
3Generation VIP64

NetEnt is one of the industry giants when it comes to slot machines, and it collaborates with many online casinos. In the table above, you may see the top 3 NetEnt slot sites that we recommend for you after extensive research and testing. They offer many slot machines created by this famous software provider and promotions you can use on them.

On these platforms, you will be able to enjoy a variety of features, become a VIP player and benefit from all the loyalty program perks, and choose from an extensive list of payment options. If you like to play casino games on the go, you can do so using the platforms’ mobile apps which allow quick and simple access and the same top-level gaming experience.

Top 3 Casinos with slots from many software providers

#Casino NameSoftware ProvidersSlots number
2Temple Nile1051000+
3Jackpot Village1021200+

Here are the top 3 casinos that collaborate with the most software providers in order to put at their customers’ disposal over a thousand slot machines. These are some of the best platforms and are already popular among players, thanks to everything they have to offer.

If you are looking for the latest casinos to try, check out the new slots sites in the US, and you will find many options there.


Slot machines are only becoming more popular each day, in land-based, but especially online casinos, as players may also benefit from slot bonuses. A core part of gambling, slot machines have to be available on every online casino, but some walk the extra mile and offer their customers products from a multitude of software providers. With new games being launched every month and casinos ready to create promotions for each new slot machine in order to attract players, we can only expect them to gain even more popularity from now on.

References and Methodology

Some of the information used in this article comes from our experts’ observations, as well as market analysis. Additional information comes from the following sources:

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