Remember the movie National Lampoon’s Vegas Vacation, when gambling fever consumes Chevy Chase’s character, Clark W. Griswold? He goes on a losing streak to beat all losing streaks while his son, Rusty, wins four cars by playing the slot machines. Maybe Clark would have done better if he had read Probability For Dummies! In this article, you discover the basic ideas behind slot machines and how they work, so that you can get past the myths and develop a strategy based on sound probability.

This is a list of potential restrictions and regulations on private ownership of slot machines in the United States on a state by state basis. Laws restricting noncommercial ownership/use of mechanical & digital games of chance. If the slot machine gives you more than two times the payout when you put in two times the number of coins, for example, you should max it out instead of playing single coins because you increase your chances of winning a bigger pot, and the expected value is higher. Hand Pay Jackpots. When you hit the winning combination of symbols for a large jackpot, your slot machine locks up. Depending on the machine, the lights on top of the machine may come on and start flashing, music may play or bells ring. A slot attendant arrives promptly to see what you have won.

Understanding average payout

When casinos advertise that their slot machines pay out an average of 90 percent, the fine print they don’t want you to read says that you lose 10 cents from each dollar you put into the machines in the long term. (In probability terms, this advertisement means that your expected winnings are minus 10 cents on every dollar you spend every time the money goes through the machines.)

Suppose you start with $100 and bet a dollar at a time, for example. After inserting all $100 into the slot, 100 pulls later you’ll end up on average with $90, because you lose 10 percent of your money. If you run the $90 back through the machine, you’ll end up with 90 percent of it back, which is 0.90 x 90 = $81. If you run that amount through in 81 pulls, you’ll have $72.90 afterward (0.90 x 81 = 72.90). If you keep going for 44 rounds, on average, the money will be gone, unless you have the luck of Rusty Griswold!

How many pulls on the machine does your $100 give you at this rate? Each time you have less money to run through the machine, so you have fewer pulls left. If you insert $1 at a time, you can expect 972 total pulls in the long term with these average payouts (that’s the total pulls in 44 rounds). But keep in mind that casinos are designing slot machines to go faster and faster between spins. Some are even doing away with the handles and tokens by using digital readouts on gaming cards that you put into the machines. The faster machines can play up to 25 spins per hour, and 972 spins divided by 25 spins per minute is 38.88 minutes. You don’t have a very long time to enjoy your $100 before it’s gone!

The worst part? Casinos often advertise that their “average payouts” are even as high as 95 percent. But beware: That number applies only to certain machines, and the casinos don’t rush to tell you which ones. You really need to read or ask about the fine print before playing. You can also try to check the information on the machine to see if it lists its payouts. (Don’t expect this information to be front and center.)

Implementing a simple strategy for slots

Advice varies regarding whether you should play nickel, quarter, or dollar slot machines and whether you should max out the number of coins you bet or not (you usually get to choose between one and five coins to bet on a standard slot machine). In this section, you’ll find a few tips for getting the most bang for your buck (or nickel) when playing slot machines.

Basically, when it comes to slot machines, strategy boils down to this: Know the rules, your probability of winning, and the expected payouts; dispel any myths; and quit while you’re ahead. If you win $100, cash out $50 and play with the rest, for example. After you lose a certain amount (determined by you in advance), don’t hesitate to quit. Go to the all-you-can-eat buffet and try your luck with the casino food; odds are it’s pretty good!

Choosing among nickel, quarter, and dollar machines

The machines that have the higher denominations usually give the best payouts. So, between the nickel and quarter slots, for example, the quarter slots generally give better payouts. However, you run the risk of getting in way over your head in a hurry, so don’t bet more than you can afford to lose. The bottom line: Always choose a level that you have fun playing at and that allows you to play for your full set time limit.

Deciding how many coins to play at a time

When deciding on the number of coins you should play per spin, keep in mind that more is sometimes better. If the slot machine gives you more than two times the payout when you put in two times the number of coins, for example, you should max it out instead of playing single coins because you increase your chances of winning a bigger pot, and the expected value is higher. If the machine just gives you k times the payout for k coins, it doesn’t matter if you use the maximum number of coins. You may as well play one at a time until you can make some money and leave so your money lasts a little longer.

For example, say a quarter machine pays 10 credits for the outcome 777 when you play only a single quarter, but if you play two quarters, it gives you 25 credits for the same outcome. And if you play the maximum number of quarters (say, four), a 777 results in 1,000 credits. You can see that playing four quarters at a time gives you a better chance of winning a bigger pot in the long run (if you win, that is) compared to playing a single quarter at a time for four consecutive tries.

The latest slot machine sweeping the nation is the so-called “penny slot machine.” Although it professes to require only a penny for a spin, you get this rate only if you want to bet one penny at a time. The machines entice you to bet way more than one penny at a time; in fact, on some machines, you can bet more than 1,000 coins (called lines) on each spin — $10 a shot here, folks. Because these machines take any denomination of paper bill, as well as credit cards, your money can go faster on penny machines than on dollar machines because you can quickly lose track of your spendings. Pinching pennies may not be worth it after all!

Players dream of hitting a big jackpot when they play the slots. When that day comes for you, you'll have questions about the taxes you must pay on the winnings.

Hand Pay Jackpots

When you hit the winning combination of symbols for a large jackpot, your slot machine locks up. Depending on the machine, the lights on top of the machine may come on and start flashing, music may play or bells ring. A slot attendant arrives promptly to see what you have won.

On jackpots smaller than $5,000, an attendant verifies that you hit the jackpot and then assists you in claiming your money at the cashier's cage. In the case of a large or progressive jackpot, the casino may have technicians come and check the machine to certify that it was functioning properly when the jackpot hit. If you hit one of the wide-area progressive machines such as MegaBucks, the slot company that operates the game comes out and verifies that machine before giving you a check.

When you hit a jackpot, you have the option of taking your winnings in cash or check. Usually, large amounts are paid by check. In the case of the MegaBucks or similar multi-million dollar jackpots, you receive a check for the partial amount, and then you have 90 days to decide if you want to be paid a lump sum or an annual annuity on the balance. If you select the lump sum option, you receive only a percentage of your actual winnings. For example, the full winnings of one multi-million slot jackpot is paid in 25 annual installments, or you can take a lump sum of 60 percent of the winnings.

IRS Withholding

All casino winnings are subject to federal taxes. However, the IRS only requires the casinos to report wins over $1,200 on slots and ​video poker machines or other games such as keno, lottery or horse racing. When you have a win equal to or greater than $1200, you are issued a W-2G form. This form lists your name, address and Social Security number. The casinos are not required to take out withholding tax on jackpots under $5,000 as long you supply your Social Security number. If you don’t provide your Social Security number, the casinos withhold 28 percent on small jackpots.

You can request a specific amount of withholding tax to be taken out of any jackpot you win. Some players like to do this to avoid a big tax payment in April when they file their income tax returns. The additional withholding may not be necessary if you keep a log book. The law allows you to deduct gambling losses up to the amount of your winnings. You can only do this if you have documentation of your losses. Keeping a diary or log book is the way to do this.

Proper Identification

Casinos can refuse to pay you until you produce proper identification—a photo ID such as a driver’s license, military ID or passport.

If you don’t produce an ID, you are photographed and the casino holds your winnings until you come back with proper ID. For this reason, you should always carry a valid form of identification with you when you visit the casino.

When the casino checks your identification, it also checks your age to make sure you are legally old enough to play. The minimum age for gambling varies from state to state, but under-age gamblers are not be paid if they hit a jackpot. This is the law in all jurisdictions, and it has been upheld in court.

Plan Ahead

Nevada Slot Machine Payout Laws

Minnesota Slot Machine Payout Laws

Before you start playing your favorite slot machine you should have a plan for the day you hit a jackpot. Players become excited when they hit the big one, and this may affect the decisions you make about your winnings. It is helpful if you know ahead of time how much withholding you want taken out or whether you want a check for all or some of the amount.