Video slots that feature free spins as their main bonus events usually fall between the three-reel games and the pick’em games in both volatility and the chance at a big win. During free spins you make no additional bets and can win anything up to the top jackpot. However, it’s also possible to win nothing on the free spins. We interviewed some frequent slot players and casino workers. We got these inside tips on how to increase your chances of winning. You won't want to miss thi.

There are thousands of slots at casinos and online, with new slot titles being dreamt up all the time. While millions of people enjoy these games, few know how they work behind the scenes. On this page, we explain how slot machines work and the essential playing concepts that can make a difference for your bankroll.

Slots have evolved drastically from the first mechanical three-reel devices. These days, most slots are electronic, showing animated symbols on HD screens. Many have elaborate themes, some tie-in with popular music, TV or movie franchises. Bonus games might vary widely, though the underlying technology based on random number generator (RNG) software is standard for all games.

Below, you’ll find out more about how RNG software works, key factors like return-to-player (RTP) percentages and the many varieties of slots available.

Also, we share how to take advantage of bonuses and loyalty schemes to get the best bang for your bucks from slot play. If you’re looking for a spot to play slots online, we recommend the list below. Most of the casinos offer games similar to those you find in your local casino.

How to guides: How to win at craps > How to win at sports betting

Best casinos to win real prizes in 2021

by Steve 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 thehandle 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 thataccounts for much of the success of slot machines in modern American casinos.

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, 2018 the total win by all of the state’s casinos was a little more than $11.8 billion. Of that amount, $7.54 billion, or slightly less than 64 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 makesmoney for the casino by paying out less money than it takes in. In some states, such as Nevada and New Jersey, the minimum amount to be returned is regulated. In Nevadacasinos the minimum is 75 percent and in New Jersey casinos it’s 83 percent. However, if you look at the slot payback percentages for those particular states inthis book you will see that the actual average payback percentages are much higher. In New Jersey it’s close to 91 percent and in Nevada it’s slightly more than 93 percent. Even though theactual paybacks are higher than the law requires, you can still see that on average for every $1 you play in any of the Atlantic City casinos you will lose 9¢ and inLas Vegas casinos 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 yourmoney, 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. Allmodern 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 alist 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 around85% 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 themanufacturer 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 theirmarketing philosophy.

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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 thisextremely 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 todetermine 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 wayto tell is by knowing what is programmed into the RNG.

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, theknowledge 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 inan 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 andare 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, thepayback percentage is lower on these machines than the average $1 machine. During Nevada’s fiscal year ending June 30, 2018 Megabucks averaged a little less than 89% 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) forchasing 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 machinebefore playing to see how it says you will be paid for the jackpot.

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 maximumnumber 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 twocoins, 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 atwo-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 betthe minimum amount. To see more on this subject, watch my video titled 'The Slot Machine - When tobet Maximum Coins' on our YouTube channel.

Knowledge of which casinos offer the best payback percentages is also helpful. When available, we print that information in this book to help you decide where to go for the best return on yourslot machine dollar. 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 Vegassection and you'll see that you can get better returns for your slot machine dollar by playing at the off-Strip area casinos.

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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 costanything 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 getcarried 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 intobetting more than you had planned.

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 nodecisions 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 getahead (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 youare to go broke.

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herefore, 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 tostop 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 tokeep 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 andfind 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. If you made yourwinnings on $1 machines, move down to quarters. If you won on quarters, move down to nickels. The idea now is basically to kill some time and have a little fun knowing that no matter whathappens you’ll still leave as a winner.

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 machine will pay out more than it takes in. There are, however, some things you could try to help you find themore generous machines and avoid the stingy ones. Keep in mind that all slot machine payback percentages shown in 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 amachine 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 playit. 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.

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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 havemore 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 anotheraccounting. 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 youhave to slow down your play to take periodic accountings and you will always have an accurate idea of how well you are doing.

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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 threetimes 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 on this subject, watch myvideo titled '10 Tips To Stretch Your Slot Machine Bankroll' on our YouTube channel.