by Matt Bourie

Virtually anyone who visits a casino, even for the first time, is familiar with a slot machine and how it operates: just put in your money, pull the handle, or push the spin button, and wait a few seconds to see if you win.

It isn’t intimidating like table games where you really need some knowledge of the rules before you play and it’s this basic simplicity that accounts for much of the success of slot machines in the modern American casino.

Casinos in the U.S. make most of their profits from slot machine revenues.

How Much Do Casinos Make From Slot Machines?

As a matter of fact, the biggest money-maker for casinos is the slot machine with approximately 65 percent of the average casino’s profits being generated by slot machine play. As an example, in Nevada’s fiscal year ending June 30, 2019 the total win by all of the state’s casinos was a little more than $11.9 billion. Of that amount, $7.80 billion, or slightly more than 65 percent, was from electronic machine winnings.
With this in mind, you must ask yourself, “can I really win money by playing slot machines?” The answer is a resounding yes…and no. First the “no” part: in simplest terms a slot machine makes money for the casino by paying out less money than it takes in.

How Much Do Slot Machines Pay Back to the Players?

In some states, such as Nevada and New Jersey, the minimum amount to be returned is regulated. In Nevada the minimum is 75 percent and in New Jersey it’s 83 percent. However, if you look at the slot payback percentages for those particular states you will see that the actual average payback percentages are much higher. You can see those statistics, here –
In New Jersey it’s actually close to 91 percent and in Nevada it’s around 93 percent. Even though the actual paybacks are higher than the law requires, you can still see that on average for every $1 you play in an Atlantic City slot machine you will lose 9¢ and in a Las Vegas slot machine you will lose 7¢. Therefore, it doesn’t take a rocket scientist to see that if you stand in front of a slot machine and continue to pump in your money, eventually, you will lose it all. On average, it will take you longer to lose it in Las Vegas rather than Atlantic City, but the result is still the same: you will go broke.
Gee, sounds kind of depressing, doesn’t it? Well, cheer up because now we go on to the “yes” part. But, before we talk about that, let’s first try to understand how slot machines work.

Slot machines use a Random Number Generator (RNG) to randomly determine the outcome of each spin.

How Do Slot Machines Work?

All modern slot machines contain a random number generator (RNG) which is used to control the payback percentage for each machine. When a casino orders a slot machine the manufacturer will have a list of percentage paybacks for each machine and the casino must choose one from that list.
For example, a manufacturer may have 10 chips available for one machine that range from a high of 98% to as low as 85%. All of these chips have been inspected and approved by a gaming commission and the casino is free to choose whichever chip it wants for that particular brand of machine.
In almost all instances, the casino will place a higher denomination chip in a higher denomination machine. In other words, the penny machines will get the chips programmed to pay back around 85% and the $25 machines will get the chips programmed to pay back around 98%.
A casino can always change the payback percentage, but in order to do that it usually must go back to the manufacturer to get a new RNG that is programmed with the new percentage. For this rea­son, most casinos rarely change their payback percentages unless there is a major revision in their marketing philosophy.
And what exactly is a random number generator? Well, it’s a little computer chip that is constantly working (as its name im­plies) to generate number combinations on a random basis. It does this extremely fast and is capable of producing hundreds of combinations each second.
When you pull the handle, or push the spin button, the RNG stops and the combination it stops at is used to determine where the reels will stop in the pay window. Unlike video poker machines, you have no way of knowing what a slot machine is programmed to pay back just by looking at it. The only way to tell is by knowing what is programmed into the RNG.

How Much Does My Favorite Slot Machine Pay Back to Players?

As an example of the differences in RNG payout percentages we have listed below some statistics concerning various slot manufacturers’ payback percentages in their slot machines.

Normally, this information isn’t available to the public, but it is sometimes printed in various gaming industry publications and that is where we found it. The list shows the entire range of percentages that can be programmed into each machine:

A bonus round in the Jackpot Party slot machine.


Machine Name Payback Range
Fu Nan Fu Nu 86.00% – 95.00%
River Dragons 86.00% – 95.00%

Ainsworth Game Technology

Machine Name Payback Range
El Toro Wild 85.00% – 96.00%
Kong of Skull Island 85.00% – 96.00%
Mustang 82.00% – 96.00%
PAC MAN 86.00% – 94.00%


Machine Name Payback Range
African Storm 87.86% – 94.84%
Britney Spears 86.00% – 96.00%
The Walking Dead 88.50% – 93.50%
Buffalo Diamond 88.00% – 95.00%
Wild Panda 88.00% – 95.00%
Sharknado 87.82% – 90.01%


Machine Name Payback Range
Smokin Hot Stuff
Wicked Wheel
88.00% – 98.00%

Aruze Gaming

Machine Name Payback Range
999.9 Gold Wheel
Ultra Stack: Lion Gold
87.58% – 96.40%
999.9 Gold Wheel
Ultra Stack: Dragon Gold
87.58% – 96.40%
Money Rush 87.02% – 97.94%

Scientific Games

Machine Name Payback Range
Black & White
5 Times Pay
84.49% – 96.72%
Black & White Sevens 87.00% – 95.00%
Blazing 7’s Double (Reel) 88.00% – 95.98%
Cash Spin 85.72% – 88.38%
Heidi’s Bier Haus 86.07% – 95.44%
Hot Shot Progressive 85.41% – 96.01%
Hot Spin 87.59% – 89.99%
Money Wheel 85.38% – 96.08%
Triple Cash Wheel
with Quick Hit
85.49% – 93.95%
Spin & Win (3-Reel) 83.24% – 94.00%
Cash Crop 86.36% – 94.92%
James Bond: Goldfinger 85.92% – 94.96%
Quick Hit Ultra Pays 85.49% – 95.97%
Ultimate Fire Link 85.23% – 95.99%


Machine Name Payback Range
Blake Shelton 85.90% – 96.00%
Diamond Jackpots 87.90% – 96.50%
Elephant King 85.03% – 98.04%
Enchanted Unicorn 85.00% – 98.00%
Gong Xi Fa Cai 85.09% – 96.01%
Ocean Magic 86.00% – 96.00%
Red White and Blue 85.03% – 97.45%
Texas Tea 87.00% – 97.00%
Wolf Run 2:
Into The Wild
85.00% – 98.00%
IC Money 85.20% – 97.02%
Zuma 84.15% – 94.16%
Sphinx 3D 86.00% – 92.00%
Wheel of Fortune:
Triple Double Diamond
85.90% – 96.00%

Konami Gaming

Machine Name Payback Range
African Diamond 82.13% – 96.03%
Big Africa 85.50% – 98.10%
China Shores Great Stacks 82.00% – 96.00%
Triple Sparkle 82.00% – 96.00%

Incredible Technologies

Machine Name Payback Range
Crazy Money Deluxe 85.20% – 94.00%
Money Roll 85.15% – 94.00%
Money Rain Deluxe 85.10% – 94.06%
Clinko Winning Wall 85.08% – 94.08%

IGT Wheel of Fortune 4D Slots (PRNewsfoto/IGT)

Can You Win on Slot Machines?

Okay, now let’s get back to the “yes” part. Yes, you can win money on slot machines by using a little knowledge, practicing some money management and, mostly, having lots of luck.
First, the knowledge part. You need to know what kind of player you are and how much risk you are willing to take. Do you want to go for the giant progressive jackpot that could make you a millionaire in an instant or would you be content walking away just a few dollars ahead?
An example of a wide-area progressive machine is Nevada’s Megabucks where the jackpot starts at $10 million. These $1 machines are located at more than 125 Nevada casinos around the state and are linked together by a computer. It’s fine if that’s the kind of machine you want to play, but keep in mind that the odds are fairly astronomical of you hitting that big jackpot.
Also, the payback percent­age is lower on these machines than the average $1 machine. During Nevada’s fiscal year ending June 30, 2019 Megabucks averaged a little more than 87% payback while the typical $1 machine averaged a little less than 94%. So, be aware that if you play these machines you’ll win fewer small payouts and it will be very difficult to leave as a winner. Unless, of course, you hit that big one!
If you really like to play the wide-area progressive machines your best bet is probably to set aside a small percentage of your bankroll (maybe 10 to 15 percent) for chasing that big jackpot and saving the rest for the regular machines.
One other thing you should know about playing these wide-area pro­gressives is that on most of them, including Megabucks, you will receive your jackpot in equal payments over a period of years (usually 25). You can avoid this, however, by playing at one of the casinos that link slot machines at their own properties and will pay you in one lump sum. Be sure to look on the machine before playing to see how it says you will be paid for the jackpot.

Should You Always Make Max Bets on Slot Machines?

Knowledge also comes into play when deciding how many coins to bet. You should always look at the payback schedule posted on the machine to see if a bonus is payed for playing the maximum number of coins that the machine will accept.
For example, if it’s a two-coin machine and the jackpot payout is 500 coins when you bet one coin, but it pays you 1,200 coins when you bet two coins, then that machine is paying you a 200-coin bonus for playing the maximum number of coins and you may want to bet the maximum two coins to take advantage of that bonus.
However, if it’s a two-coin machine that will pay you 500 coins for a one-coin bet and 1,000 coins for a two-coin bet, then there is no advantage to making the maximum bet on that machine and you should only bet the minimum amount. To see more on this subject, watch my video titled “The Slot Machine – When to bet Maximum Coins” on our YouTube channel at
Knowledge of which casinos offer the best payback percentages is also helpful. You may want to go to the Las Vegas Strip to see some of the sites, but take a look at the slot machine payback percentages for the Strip-area casinos in the Las Vegas section, here – and you’ll see that you can get better returns for your slot machine dollar by playing at the off-Strip area casinos.
The final bit of knowledge you need concerns players clubs. Every major casino has a players club and you should make it a point to join it before you insert your first coin. It doesn’t cost anything to join and as a member you will be able to earn complimentaries from the casinos in the form of cash, food, shows, drinks, rooms or other “freebies.”
Just make sure you don’t get carried away and bet more than you’re comfortable with just to earn some extra “comps.” Ideally, you want to get “comps” for gambling that you were going to do anyway and not be pressured into betting more than you had planned.

Asian-themed slot machines are very popular in casinos throughout the world.

Can “Money Management” Help You Win on a Slot Machine?

Now let’s talk about money management. The first thing you have to remember when playing slot machines is that there is no skill involved. Unlike blackjack or video poker, there are no deci­sions you can make that will affect whether you win or lose. It is strictly luck, or the lack of it, that will determine whether or not you win. However, when you are lucky enough to get ahead (even if it’s just a little) that’s where the money management factor comes in.
As stated earlier, the longer you stand in front of a machine and put in your money, the more likely you are to go broke. Therefore, there is only one way you can walk away a winner and that’s to make sure that when you do win, you don’t put it all back in. You really need to set a “win goal” for yourself and to stop when you reach it.
A realistic example would be a “win goal” of roughly 25 percent of your bankroll. If you started with $400, then you should stop if you win about $100. The “win goal” you decide on is up to you, but keep in mind that the higher your goal, the harder it will be to reach it, so be practical.
And what if you should happen to reach your goal? Take a break! Go have a meal, see a show, visit the lounge for a drink or even just take a walk around the casino. You may have the urge to keep playing, but if you can just take a break from the machines, even it’s just for a short time, you’ll have the satisfaction of leaving as a winner.
If, later on, you get really bored and find that you just have to go back to the machines you can avoid a total loss by not risking more than half of your winnings and by playing on smaller denomination machines. So, let’s say that you made your winnings on $1 machines, then move down to quarters. And, if you won on quarters, then move down to nickels. The idea now is basically to kill some time and have a little fun knowing that no matter what happens you’ll still leave as a winner.

How Much Does Luck Matter When Playing Slot Machines?

And now, let’s move on to luck. As stated previously, the ul­timate decider in whether or not you win is how lucky you are. But, is there anything you can do to help you choose a “winning” machine? Not really, because there is no such thing.
Remember, in the long run, no slot machine will pay out more than it takes in. There are, however, some things you could try to help you find the more generous machines and avoid the stingy ones. Keep in mind that all slot machine payback percentages shown in Slot Machine Payback Percentages this book are averages.
Like everything else in life, slot machines have good cycles where they pay out more than average and bad cycles where they pay out less than average. Ultimately, what you want to find is a machine in a good cycle. Of course if I knew how to find that machine I wouldn’t be writing this story, instead I’d be standing in front of it with a $100 bill in my hand getting ready to play it. So, I guess you’ll have to settle for my two recommendations as to how you might be able to make your slot bankroll last longer.
First, is the “accounting” method. With this method you start with a pre-determined number of credits and after playing them though one time, you take an accounting of your results. If you have more than you started with you stay at that machine and start another cycle. Just keep doing this until the machine returns less than you started with.
As an example, let’s say you start with a $10 credit voucher. After making 10 $1 bets you see how many credits you have left on the machine. If it’s more than $10 you start over again with another 10 $1 bets and then do another accounting. If, after any accounting, you get back less than the $10 bankroll you started with, stop playing and move on to a different machine.
This is an especially good method because you have to slow down your play to take periodic accountings and you will always have an accurate idea of how well you are doing.
The other method is even simpler and requires no math. It’s called the “baseball” method and is based on the principle of three strikes and you’re out.
Just play a machine until it loses three times in a row, then move on to another machine. Both of these methods will prevent you from losing a lot in a machine that is going through a bad cycle. To see more tips on playing slot machines, watch our video titled “10 Tips To Stretch Your Slot Machine Bankroll” on our YouTube channel at
Matt Bourie is the editor of the American Casino Guide book. He has been writing about casinos for more than 12 years and he also
co-hosts the American Casino Guide YouTube channel which has had more than 40 million views. A new video is released each month
that discusses a new casino gambling topic and you can subscribe for FREE at