The Best Online Slots 2021 - Play Real Money Online Slots

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By Jon Young

Discover the best online real money slot machines and casinos with our ultimate guide. You can now play online casino slots legally across the US. So, whether you are in New Jersey, Pennsylvania, West Virginia, Michigan, or Delaware - you can turn your PC or mobile phone into your own personal casino.

From classic 3-reel slots to the latest 3D 5-reel bonus slots and progressive jackpot slots, you can choose from hundreds of amazing games for free or real money.

Check out our guide to legal online casino slots in the US. At TopUSCasinos, we’ll show you how to play, tell you what games to choose, discuss slots strategy and recommend the best online sites to join.

Not in a legal state but don’t want to miss out on playing slots? You can still join in on the fun with social casinos such as Luckyland Casino and Chumba Casino, which are legal across the US. Social casinos allow you to play games for free with virtual coins, and some offer sweepstakes where you can win real cash or prizes.

Looking for the slots for real money? Do you want to claim a great slots bonus when you join up such as free spins or a deposit match? Maybe you want to play online slots for real money with no deposit. Luckily, we have an unrivaled selection of US online casinos for you. Every site goes through our team’s rigorous testing procedures. Join today and claim your bonus.

What to Look for When Choosing an Online Slots for Real Money

There is a growing number of legal online casinos in the United States. But finding a casino that’s right for you can be difficult. That’s why our review team follows strict criteria when rating every online slot operator. Here’s what we look for.

Range of Slots: As US slots players, we want to know that a casino offers a broad range of games. We check to see which providers are offered and whether jackpot slots are included.

Security & Licensing: Real money slots in the US must be properly licensed and secure. We only rate casinos with proper state gaming licenses. Software must be encrypted and games must be independently audited to ensure fairness for every slot player.

Lobby Design & Usability: Navigating your way around thousands of slots can be hard. We test every operator lobby to make sure you can filter games and search by provider or slot theme.

Mobile App: Many Americans now enjoy online slots apps that pay real money. We review the selection of mobile slots and test the download apps for iOS and Android handsets.

Registration Process: How easy is it to sign up for a new account? The registration process at our recommended sites should be quick and simple. ID checks and document verification should be a snap to complete.

Deposits & Withdrawals: Making quick payments is essential if you want to play real money slot games online. We test every casino cashier for speed by depositing our own dollars. We’ll also withdraw cash to test the processing periods.

Customer Support: Got a problem with a slow withdrawal or a slot that has crashed? Good customer support is important for resolving issues quickly. The top US casinos should have 24-hour support via live chat, email or toll-free phone lines.

Bonuses & Promotions: Turn your online slots game play into free cash with a casino bonus. The best online slots in the US offer generous welcome bonuses for new players. You should get a deposit match plus free spins on the most popular video slots.

Why You Should Play Online Slots for Real Money

Legal online slots have only been available in the US for a few years. But there are more reasons to play than ever.

Win real money instantly in your account: Nothing matches the thrill of winning real cash on your PC or mobile. While free-play games are fun for learning the rules, real money slot machines offer the chance of big cash prizes.

Enjoy your favorite land-based slots online: Many of the best land-based slot machines are adapted for online and mobile casinos. Enjoy the same gameplay, graphics and bonus rounds as you would find in your local casino.

Wider range of stakes: Have you been put off by those $5 slots in your local casino? Online slot machines often carry lower minimum stakes. Play for $0.01 a line or hit the max bet and go for the jackpot.

No need to travel to your nearest casino: You can play online slots in a handful of US states. But what if you live hundreds of miles from the casino? Online slot machines provide easy access to real money games.

Earn a better bonus online: Some land-based casinos offer comps to regular customers. But the best casino bonuses can be found online. Sign up and earn a welcome bonus or join a VIP program and earn points while playing slots.

Highest Paying Online Slot Games

Below is a list of the highest paying slot game, based on the game’s RTP. This is the Return to Player percentage, the average payout made to gamblers over millions of spins. It’s a good indication of whether a slots game is generous or not.

Slot GameRTPSoftware
1. Goblin's Cave99.32%WMS
2. Starmania97.867%WMS
3. Jack Hammer 297.1%NetEnt
4. Butterfly Staxx96.80%NetEnt
5. Thunderstruck II96.65%IGT
6. Mega Fortune96.64%IGT
7.Starburst96.1%888
8. 88Fortunes96%partyGaming
9. Millionaire Genie96%SkillOnNet
10. Cleopatra95.02%IGT

Most Popular Online Slot Games in the US Right Now

You can get access to hundreds of legal and tested online slot machines. But which are the best, and which providers should you go for?

There are a handful of regulated software providers supplying games to US casinos. Here, we’ve picked out a top 10 of US online casino slots to get started.

88 Fortunes

88 Fortunes is a WMS online slot with medium volatility and an Oriental theme. You can trigger the Fu Bat feature to win a jackpot or activate free spins with special gold symbols. 88 Fortunes plays with 243 ways to win and has a base jackpot worth $200,000.

Goblin's Cave

Goblin’s Cave is a classic Playtech slot played with 3 reels and boasting an RTP over 99%. The slot uses a unique slots mechanic which lets you hold symbols on one reel. These are then replicated across every other reel in the game.

Divine Fortune Megaways

Divine Fortune Megaways is a sequel to NetEnt’s popular progressive slot set in ancient Greece. The game features the Megaways mechanic where you can play up to 117,649 ways to win on every spin. Plus, the game boasts a top jackpot worth $1 million.

Epic MONOPOLY II

Epic MONOPOLY II is part of a range slots from WMS based on the classic board game. The slot features two sets of reels, one of which includes stacked wilds and big-paying symbols. You can also trigger the Epic Wheel Bonus where you can win free spins.

Fruit Xtreme

Playson’s Fruit Xtreme is a classic slot crammed with fruit symbols like oranges and lemons. The game features multipliers which come into play when you fill the reels with identical symbols.

Understanding the Return to Player Percentage

Every slot is programmed with a return to player percentage (RTP). This relates to the average payouts made back to players over a long period. For instance, an online slot with an RTP of 96% will pay back, on average, 96c for every $1 paid in. The remainder, 4 cents in the dollar, is kept by the casino.

Online casinos normally list their slot RTPs so you can make a judgment on what games to play. In addition, regulated slots are independently tested to ensure their payouts are accurate.

Can I Play Online Slots for Free?

The beauty of online casino slots is that you can often try games out for free first. That’s a luxury you just don’t have in a land-based casino.

To play online slots for real money, you will have to physically located within the state where the casino is registered. Luckily, you can try free-play slots from almost anywhere. You can also head to our hand-picked free slots. Here you'll find games from some of the top operators, like BetMGM. Test a couple of spins on a few games and head to the casino for real money slot action.

Here are the benefits of playing free online slot machines over real-money games.

Online Slots for Real Money vs Free Online Slots

It’s easy to get started with free slot machines. You’ll find them in the casino lobby right beside the real-money versions. Simply click on the Demo Play or Free Play button to open a game.

Can I Win Real Money?

In a free online slot game, you will be rewarded with play credits to use on the game. Once you’ve run our credits, exit the game and open it again. Your credit balance will be restored.

Remember, you can’t win any real money playing free slots, but they do give you a taste of how the game and bonus features work.

To play real money slots, you will need to credit your account. Make a deposit in your casino account and open a game. Your entire balance will be available to play with when you open the slots game.

How Much Can I Win?

You won’t be able to win any money playing free slots, but you can win cash on real money slots. Jackpots vary, so always look at the slot paytable before you start. The paytable will list all available payouts, as well as jackpots and bonus features.

Are There Any Special Features?

In terms of gameplay, there isn’t much difference between the demo play and real money versions of the same slot. The graphics and gameplay will be identical, and you can trigger bonus features like free spins.

A progressive jackpot slot pays out a dedicated jackpot if you hit the right symbols. Demo play versions of progressives will have this feature removed.

What Types of Slot Machines are Available Online?

You can try out a wide range of online slot machines at the top US casinos. Here are some of the most popular slot types you will find.

Classic Slots/Steppers

Classic slot machines resemble AWP-style (Amusements with Prizes) games a slot player might find in Las Vegas or Atlantic City. Classic slots feature iconic fruit symbols and usually just a single payline or two. You may not get a bonus feature, either.

Recommended: Double Diamond (IGT), Hot Roll Super Times Pay (IGT), Quick Hit Platinum (Bally)

Branded Slots

Enjoy your favorite movie stars or rock musicians in an exciting branded slot. Branded games usually feature authentic images and sound from the source film or TV show. You’ll also be treated to bonus games linked to the real-life stars.

Recommended: Anchorman (Bally), Jumanji (NetEnt), Jimi Hendrix (NetEnt)

Bonus Slots

The majority of online slot machines are bonus slots. Bonus slots are typically played on 5 or 6 reels and feature at least bonus round. Trigger free spins or hit wilds for super bonus wins.

Recommended: Jack and the Beanstalk (NetEnt), Raging Rhino (WMS), Cleopatra (IGT)

Progressive Slots

Progressive jackpot slots are special games that award a big jackpot made up of smaller bets. The best progressive jackpots are linked across multiple casinos. The more players who spin the reels, the bigger the jackpot gets.

Recommended: Divine Fortune (NetEnt), Mercy of the Gods (NetEnt), Millionaire’s Club III (888)

Multi-Payline

Multi-line slots use hundreds or thousands of paylines to give you more chances of winning. In addition, you have the chance to trigger a big bonus feature or win a giant jackpot. Unlike conventional slots with horizontal paylines, multi-payline slots award a prize whenever you match symbols anywhere on adjacent reels.

Recommended: Anubis Wild Megaways (up to 117,649 ways to win); Raging Rhino (4,096 ways to win); Twin Spin (243 ways to win)

Video Slots

Video slots is a name for any online slot that uses computer graphics and animation in its gameplay. The original video slots used primitive microprocessors instead of mechanics to determine where the reels stopped. With computerized RNGs (random number generators), all modern online slots can be classed as video slots.

Recommended: Bonanza, Blood Suckers II, Dead or Alive II

Popular Online Slots Software Providers

Online slots developers must acquire a state gaming license if they want to operate legally in the United States. In 2020, there are more than a dozen leading online casino slots providers offering games to local players.

Here are some of the biggest and best US-facing slots manufacturers. Often, you can play a developer’s slots game instantly through your web browser. Just open a browser window and load a game in seconds.

IGT

IGT (International Game Technology) has been a leading developer in land-based slots for decades. They were one of the first software providers to launch real money slots in the regulated US market. IGT is known for big branded slots like Baywatch, and big-money progressives like Cleopatra MegaJackpots.

Top IGT Slots: Cleopatra, Bubble Craze, Siberian Storm

NetEnt

NetEnt is a Swedish online slots and casino game developer that provides licensed games in states like New Jersey. NetEnt is known for its high-paying slots like Jack Hammer and high-variance branded slots like The Invisible Man. It also supplies one of the best US-facing progressive slots, Divine Fortune.

Top NetEnt Slots: Divine Fortune, Planet of the Apes, Motorhead

WMS

WMS (Williams Interactive) is a US casino developer that now forms part of the SG Gaming giant. WMS offers hundreds of the best online slots to legal online casinos like MONOPOLY Megaways and Raging Rhino. Many games have been adapted from existing land-based slot machines.

Top WMS Slots: Raging Rhino, Lock it Link Night Life, Zeus III

Bally

Bally is another developer who started out as a land-based slot machine manufacturer. Bally now supplies hundreds of its great online slots to licensed casinos in the US. They are best-known for classic slots like Quick Hit Platinum and Quick Hit Ultra Pays.

Top Bally Slots: Quick Hit Super Wheel, Cash Spin, Dragon Spin

Konami

The Japanese video games legends have turned their attention to online slot machines in recent years. Konami is best-known in the casino world for its range of jackpot slots like China Shores and Jackpot Shores.

Top Konami Slots: China Shores Quick Strike Online, Chili Chili Fire, Lotus Land

Barcrest

Barcrest is a UK classic slots developer that now releases games as part of SG Gaming. Barcrest’s best slots include the Rainbow Riches titles and a series of MONOPOLY-themed games.

Top Barcrest Slots: MONOPOLY 250k, Soldier of Rome, Rainbow Riches

Ainsworth

Ainsworth is an Australian developer which started life producing “pokies” for clubs and casinos Down Under. It now supplies simple 5-reel slots in the US under various state licenses.

Top Ainsworth Slots: Big Thunder Quad Shot, Pussy Cat, Super Charged

High 5 Games (H5G)

High 5 Games is a leading developer of social casino and online casino slots. H5G also develops top online slots for other major providers. Many of High 5 Games’ slots can be played on mobile and tablet.

Top High 5 Games Slots: Double Da Vinci Diamonds, Empress of Time Destiny, Secrets of the Forest

SHFL (ShuffleMaster)

SHFL is a major manufacturer of table game equipment for casinos. However, it also produces online casino games, slots and slot apps. SHFL is fully licensed to supply online slot machines to many legal US casinos.

Top SHFL Slots: 88 Fortunes, 88 Fortunes Megaways, Endless Treasure

BTG (Big Time Gaming)

Big Time Gaming is the brains behind the popular Megaways mechanic that gives slots gamblers the chance to play up to 117,649 ways to win on every spin. BTG even licenses out the feature to other US-facing developers.

Top BTG Slots: Bonanza Megaways, Kingmaker Megaways, Opal Fruits

Make Sure to Get the Best Bonus Possible

When you play online slots with real money, you’ll always have the chance to earn free cash. Casinos are always keen to retain players, and they achieve that through various bonuses and promotions. Many people are looking for no deposit slot bonuses. You'll be pleased to know that these slot promotions are readily available at our recommended sites. Other exciting promos that let you play slots for real money include:

Welcome Bonus: Deposit Match

The best way to earn free cash at a casino is by claiming a deposit match bonus. Make your first deposit and play eligible slots in order to clear your bonus. Clear the bonus funds within the set time period and you’ll be rewarded with free cash. Here’s how it works:

  • The online casino awards new signups with a 100% welcome bonus up to $500 (for example). That means, if you deposit up to $500, the casino will match it with the same amount in bonus funds.
  • All slots contribute 100% toward the bonus. So, for every dollar you play, you will clear a dollar of bonus cash.
  • The bonus will carry a wagering requirement. It could be anywhere from 10x to 50x the size of the deposit. To clear the money, you must meet the wagering requirement.
  • If you deposited $100 for a 100% bonus with a 25x wagering requirement, you would have to bet $100 x 25 ($2500) on slots before withdrawing your free $100.

Welcome Bonus: Free Spins

As a new signup, you can also claim free spins. It’s a great way to enjoy online slots for real money with no deposit.

In a free spins bonus, you receive a number of free games on selected slots. Play the spins at permitted stakes and rack up some winnings. To release the winnings, they must be wagered several times over.

Reload Bonus

You can also claim a reload bonus as a regular online slot game player. It’s a good way to earn free money after your welcome bonus has expired. Typically, an online casino will only match the reload 25-50%.

To claim a reload bonus, make another deposit and opt in to the promotion. Play your favorite online slots and clear the bonus funds, remembering to meet the wagering requirement.

Keep in mind, always view the terms and conditions related to any bonus you are considering. This will help you to understand what you will need to do to maximize your slot bonus. Quick Tip: Be on the lookout for large bonuses with low playthrough requirements.

Caesars Casino5x deposit match
Unibet Casino10x deposit match
Golden Nugget Casino10x welcome offer
Hollywood Casino10x deposit match
BetMGM1x Free Play, 15x deposit match

Slots Tournaments & Leaderboards

Some casinos offer slot tournaments and prize giveaways. Play a number of free spins within the allotted time period. The highest winners will climb the leaderboard and claim a share of a prize pool.

Loyalty Program

As a regular slots player, you will be eligible to join a casino loyalty program. Play regularly and earn points the more you gamble. As you earn player points, you can claim privileges like faster cashouts, free spins and prize giveaways.

Trusted Deposit & Withdrawal Methods to Consider

It’s important to choose the right deposit option if you want to play online slots for real money. There are a range of banking methods to choose from in the US. You will need to have a registered casino account in order to make deposits. As a general rule, you can expect to find these options and deposit ranges similar to those listed below. Keep in mind, payment options do vary by state. For example, if you are playing real money slots in NJ, deposit methods might be different from those available at a PA casino online.

Visa/MasterCard

Min/Max Deposit: $20-$25,000

Withdrawals: No

Fees: 2.5-3% (credit card)

Some casinos accept Visa and MasterCard for deposits. However, your card issuer may decline the transaction if it’s for online gambling purposes. Credit card deposits usually carry a cash advance fee, so factor that in when you make your payment.

PayPal

Min/Max Deposit: $10-$2,000

Withdrawals: Yes

Fees: Various

PayPal is a leading e-wallet provider used for sending money securely across the internet. PayPal deposits to casinos are usually free, but you may incur a charge when paying into your online wallet.

Play+/Prepaid Card

Min/Max Deposit: $10-$25,000

Withdrawals: Yes

Fees: N/A

Most legal slot casinos in the US offer a prepaid card, often a branded through Play+. Fund your card with cash from a debit or credit card and safely transfer the money into your casino account and back on to the card. Limits can be high, and you can even withdraw funds from a participating ATM.

PayNearMe

Min/Max Deposit: $10-$1,000

Withdrawals: No

Fees: $2.99-$4.99

PayNearMe is a great deposit option if you want to pay in cash. Make a transfer in person at your nearest 7-Eleven or Family Dollar and pay the relevant fee. Money will appear in your casino account within half an hour.

Cash @ Casino Cage

Min/Max Deposit: $10-$100,000

Withdrawals: Yes

Fees: N/A

You can make physical deposits in person if you live near a land-based casino that is tethered to the online casino site. Just visit the casino cage and make a deposit in cash. You will need to provide photo ID and a Social Security number to make the transaction.

Online Bank Transfer

Min/Max Deposit: $10-$5,000

Withdrawals: Yes

Fees: N/A

To avoid using a card, you can also make deposits via bank transfer. Not all US banks will process gambling transactions, so check first. Withdrawals can take up to 7 business days, and a higher minimum cash-out amount will apply.

ACH/e-Check

Min/Max Deposit: $20-$50,000

Withdrawals: Yes

Fees: N/A

An e-check provider such as VIP Preferred is a great option if you want to avoid declined bank transfers. VIP Preferred is a third-party processor that uses the online checking system to move money from your bank account to the casino. It’s safe, and you can enjoy member benefits.

Real Money Apps for Online Slots

Many online casinos in the US now offer mobile slots for play on smartphone and tablet. By downloading a single app, you can turn your phone into a fully-functioning casino.

The best US casinos offer download apps for iOS/Apple and Android devices. You will find the iOS apps in the App Store, but Android apps are usually available direct from the casino’s website.

After installing the app, you will need to establish a solid Wi-Fi connection to run slots. You will also need to have GPS enabled on your phone or tablet so that the casino knows you are playing in a regulated state.

You don’t always need to download a native app in order to play slots. Many casinos let you access their games through your mobile browser. Simply load a game in your browser and play for real money.

Mobile slots are very similar to online games but the reels and buttons are adapted to work on smaller touch screens. You may have to swipe right to find a bet slider or paytable. Some of the peripheral graphics and features may also be missing. When it comes to a real money slots app, we think you'll be very happy with our recommendations.

The Best Source for Online Slots for Real Money

We’ve outlined how to play slots and what online slots pay real money. Now it’s time to sign up to one of our top US casinos and start playing.

At TopUSCasinos, we are the ultimate experts in legal gambling in the United States. Read our reviews, choose a great casino, and take your pick of hundreds of legit video slots and games. Don’t forget to make your first deposit and claim your bonus.


CHECK OUT: Top Online Casinos in New Jersey | Pennsylvania | West Virginia | Michigan


Real Money Online Slots FAQ

Yes, of course! Deposit funds and play online slots for real money on your desktop or mobile. Top slots let you play for as little as $0.01 a line.

IGT, Bally and NetEnt offer hundreds of reliable, licensed online slots in the US. Play for free or real money through one of our recommended online casinos.

No. Top online slots are audited by external testing bodies before they make it into the casino lobby. All software providers must also apply for gaming licenses before releasing games.

A progressive jackpot is a special prize made up of smaller bets. Progressives are often linked across multiple online casinos and can reach 5 and 6-figure sums.

No. Casinos will have their own deals with software providers. The best US casinos may spread 200-600 different online slots from the biggest developers in the world.

Online slots winnings over $1,200 are taxable in the United States. You are obliged to report any online casino winnings to the IRS, but some casinos will withhold the tax for you depending on how much you win. You may also be responsible for state income tax, depending on where you play.

A payout percentage is the amount paid on average by the slot to the player. Payout percentages for online slots can be anywhere between 92% and 99%.

To find the best real money slot games, look for high payout percentages. One of the best online slots is Starmania. A 5 reel, 3 row, and 10 fixed payline slot game with an average RTP of 97.867%. Starmania is available at BetMGM, TwinSpires, and Unibet Casino.

Variance, or volatility, is the frequency that a slot pays out. Low-volatility slots pay out small and frequent prizes, while high-volatility slots pay out large and infrequent jackpots.

Yes. Online slots are similar to land-based video slots and use computerized random number generators. Traditional slots use mechanical reels and random number generators.

Yes. Legal online slot machines in the US are licensed and tested for fairness by approved bodies. Only the safest online slots are allowed into online casino lobbies.

Paylines are arrangements of symbols that pay out various prizes. The number of paylines varies from slot to slot, but you must usually match at least two are three symbols to earn a prize.

The best slots strategy is to find a game you enjoy playing. Do your research and choose games with a good RTP and interesting bonuses. Also, practice managing your bankroll to ensure you're signing out with real money in your account.

Any of the casinos you find on this page will allow mobile play, via an app or a mobile browser. Each of these operators offers a fun selection of real money slot games. You may also find demo games on select slots.

Contributors

Jon Young

Reviewer since May 2019

Jon Young is a writer and magazine editor with over 12 years' experience in the gaming sector. He has written on everything from poker and slots to casino, sports betting and mobile gambling. When not trying to take down the Mega Moolah jackpot he can be found playing poker tournaments in casinos.

Interests: Online casinos, Online slots, Online gamig