What Are the Different Types of Slot Machines?

A slot machine is a game that allows you to spin reels and win prizes. They’re also a fun way to pass the time. In addition to the standard symbols, slots also have bonus features that can help you win extra cash.

Payback Percentage

The payout percentage of a slot machine is a measure of how often a player will win compared to how much they have spent on the game. The percentage can vary from one machine to the next, so it’s important to know what you’re getting into before playing.

Return to player (RTP)

RTP is a great way to judge the odds of a game and determine whether you should play it or not. The higher the RTP, the better your chances of winning.

Progressive Jackpots

A progressive jackpot is a prize pool that builds with each spin. These jackpots can be huge, and many people have won them. You can find them in a variety of different ways, including video slots, penny machines and jackpot games at land-based casinos.


This type of slot is similar to a progressive machine, but you don’t have to bet the maximum to win it. These games have lower payouts and can take longer to hit a jackpot, so you might want to choose a different kind of slot if you’re on a budget.

Multi-line and multiplier machines are less risky than buy-a-pays, but they might not offer you as many payouts. It’s always a good idea to choose a denomination that matches your bankroll, so you can play for as long as possible without going broke.


The payouts on slot machines are determined by a computer programmed with random number generator (RNG). This algorithm generates a completely random set of numbers that are then translated into a corresponding set of symbols and reel stops.

Symbols and blanks on the machine are randomly assigned a number in this process, but it’s possible for the programmer to manipulate how many numbers are used. This can lead to a machine paying out more than it should or less than it should, depending on the programmer’s calculations.

Scatters and Free Spins

The number of special symbols that appear on the screen during a game can trigger various bonuses or features, such as free spins, mini games and even jackpots. These bonuses can make the game more enjoyable and help you increase your bankroll.


Occasionally a slot may be temporarily locked out. If this is the case, it is a good idea to use the service button and call over a slot attendant to unlock the machine. This can be done before you leave, or after you’ve taken a break for 10 minutes or more.

Payout Details

A monthly detail of a slot’s payback is posted on the casino’s website. This is typically available on the first day of each month, but it can be delayed if a casino has to review its records or reports for the previous month.