Online Slots

Online slots are one of the most popular types of online casino games in the US, largely thanks to the vast and diverse options available.

Ranging from traditional three-reel online slots, to more complex and themed games, there’s something for everyone. Players can gamble for just a few pence per spin, right up to big stakes on every turn.

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Types of Online Slots

The market is flooded with different types of online slots, ranging from very simple to pretty complicated games. Essentially, though, the object of the game is to match up winning symbols using a limited number of controls – such as spin, nudge and hold.

Players pay per spin and, with some slots, can increase their chances of winning by paying for more paylines. Here’s some of the most common types of slots you’ll find:

Three-reel Online Slots

The simplest form of slot, with three reels showing three columns and three rows. The middle row is known as the payline. The object of the game is to line up three winning symbols. Sometimes all three symbols need to match but not always – it varies from game to game. 

Five-reel Online Slots

Similar to three-reel slots, but with two more columns. Five-reel slots also have more paylines – meaning the player can win in multiple ways. Be aware that each spin can have multiple paylines, so the amount you bet on each spin can be higher. For example, a $0.10 with 20 paylines will cost $2 per spin.

Progressive Online Slots

Progressive slots give players the chance to win big. It involves a network of slot machines with players aiming to win an overall jackpot. The jackpot steadily increases as more players play until someone wins and it’s reset. How players hit the jackpot varies from game to game.


A relative newcomer to the world of online slots, i-slots introduce a narrative to slots. Like a story mode with different levels, i-slots are pitched at fans of video games, with potential winnings increasing as the game progresses.

Where Can I Play Online Slots in the US?

Since the relaxation of gambling laws in some states, players can legally enjoy online slots in the US in some states.

The number of states allowing online gambling is increasing all the time and so is the number of online casinos opening up. This, of course, is great news for players as the operators offer increasingly attractive online slot bonuses as they compete for new and returning players. 

What Types of Online Slot Bonuses Are Available?

Let’s take a look at some of those online slot bonuses. Typically, they’ll be divided into two categories – new player offers and existing player offers.

New player offers are usually the most attractive, as continually acquiring new customers is hugely important for online casinos. Almost all online slot bonuses will have wagering requirements – meaning you have to gamble a certain amount before you can withdraw any winnings. Often, these wagering requirements are pretty steep and it can be very difficult to get your money out.

Always make sure you check the terms and conditions before you sign up to make sure you have a full picture of what’s needed.

Any reputable casino will be transparent about your wagering requirements and your wagering progress. Typically this can be found in your account info – but if you’re not sure, get in touch with customer support. 

That said, bonuses are a great way of trying a new casino or slot game out, so you should certainly shop around for the best deal. We also have our amazing slots strategy guide.

Here are some typical examples of promotions available:

Free Spins, No Deposit Needed

This bonus is a great way to try out a new casino. Usually, the player gets a small number of spins just for registering – no deposit is needed.

Why do casinos do this? Two main reasons – firstly, they hope you will love the game enough to deposit your own cash and continue playing. Secondly, your registration details are of value to them, so they can contact you with other offers.

Free Spins on Deposit

Similar to the above, but triggered by a deposit, the online casino will reward players with free spins when cash is added to the balance.

Often, the offers are tiered so the more you deposit, the more free spins you will receive. As ever, check out the wagering requirements to find out how much you’ll need to gamble to be able to withdraw your winnings. 

Matched Deposit Bonus

This is a very common bonus offered by online casinos and sportsbooks where the operator matches your deposit with bonus credit. For example, a casino offering a 100% deposit bonus will balance your money when you add funds to your account.

Many online casinos offer high percentage bonuses, such as 500% because they are so keen to get that first deposit.

Multiple Deposit Package

Some casinos offer bonuses on second and third deposits to incentivize you to keep playing. The packages are typically along the lines of “200% first deposit, 100% second deposit and 50% third deposit”.

If you’re happy with what you see, these offers are a great way to get value for money from your online casino. Look out for the deposit limits – the brands will almost always state a limit up to which they will match.

No-Wager Free Spins

This type of bonus is less common but some casinos do offer free spins with no wagering requirements upon deposit. This means any winnings you make from your free spins can be withdrawn instantly.

About Kris

Kris Hunt is a content editor with over 7 years experience. Kris is an expert on all matters iGaming & sports in the USA. Kris is an Arsenal & Green Bay Packers fan. You can follow Kris on Twitter or on LinkedIn.