Slots are one of the most popular games to play at either in-person casinos or online sites all around the world. In fact, 67% of bettors who visit Las Vegas play slots while they’re in the city, and slot machines brought in more revenue for online gaming in 2023 than table games and sports betting.
The chance of winning big draws players in and keeps slot machines relevant, fun, and engaging. But, what actually triggers a jackpot on a slot machine? In this article, we’ll explore how slot machines work and what happens behind the scenes to trigger big wins for lucky players.
What Are Jackpots?
Most players know what jackpots are, but newer players may not be aware. Jackpots refer to the highest possible payout that a player can win from one single spin on a slot machine. While slots often pay out smaller prizes fairly frequently, jackpots are usually much larger and are only won once in a while. They’re won by hitting a specific combination of symbols or by triggering a bonus feature on the game.
Jackpots can be won in person, at physical casinos, and also while playing online at virtual betting sites. As player preference begins to move away from playing in-person, more and more players are opting to bet and wager online. With an unprecedented number of real money slots available online, players are not short on options. Vlad Grindu explains that the top online slot sites offer real money jackpots and huge slot game variety, making it easy to see why players prefer to play from home. However, jackpots can be won both online and in person.
The largest slots jackpot ever won in person was reportedly $39.7 million won in Las Vegas at Excaliber Casino. The massive prize was won by a software engineer from Las Angeles, California. The biggest online slots jackpot ever won was by a poker player in Finland who reportedly gave slots a try just once, with a small .25-cent spin. He won a whopping $24 million.
Random Number Generators (RNGs)
Random Number Generators (RNGs) have a lot to do with how jackpots are triggered on slot machines. RNGs are complex software programs that slot machines use in order to generate a continuous stream of totally random numbers, which determine the outcome of each spin on the reels. When a player presses the spin button, the RNG selects a random number that corresponds to a specific combination of symbols, determining the outcome of the spin.
Symbol Combinations
One of the key factors that can trigger a jackpot on a slot machine is the alignment of specific symbol combinations on the reels. Each slot game features its own set of symbols, including traditional symbols like fruits, bars, and sevens, as well as thematic symbols that vary depending on the game’s theme. The first slot machine, created in 1895 featured the liberty bell as one symbol, along with spades, hearts, and diamonds. To win a jackpot, players must often land a rare combination of high-value symbols or trigger a special bonus feature that leads to the jackpot prize. So, random number generators decide what number each spin gets, and then connect it to a symbol, which the player sees while playing. If the stars align, and the correct symbols appear, then a jackpot can be won.
Progressive Jackpots
Progressive jackpots are among the most coveted prizes in the world of slot machines, offering massive payouts that can reach millions of dollars. Unlike fixed jackpots, which have a predetermined payout amount, progressive jackpots continue to grow with each wager placed on the game. A portion of each bet placed by players contributes to the progressive jackpot pool, increasing the prize amount until it is won. Progressive jackpots can be triggered randomly or through specific combinations of symbols or bonus features, depending on the game’s mechanics.
Bet Size and Paylines
How much a player bets on a certain spin and what paylines they choose to activate often influence the likelihood of winning a jackpot while playing slots. In many cases, players have to place the maximum bet and activate all available paylines to be eligible for the jackpot prize. By betting the maximum amount allowed and covering all paylines, players increase their chances of landing the required symbol combinations or bonus triggers necessary to win the jackpot.
Return To Player Percentage
The Return to Player (RTP) percentage of a slot machine also plays a role in determining the likelihood of triggering a jackpot for lucky players. The RTP rate shows the return to players in theory over the long term and is usually shown as a percentage. Slot machines with higher RTP percentages generally offer better odds of winning, including the chance to trigger jackpots more frequently compared to machines with lower RTP percentages. Players should keep an eye out for slot games with high RPT rates and opt to play those games, over those that show low RTP rates, whenever possible.
Bonus Features and Mini-Games
Many slot machines feature bonus rounds, mini-games, or special features that can lead to jackpot wins. These bonus features are often triggered by landing specific combinations of symbols or by activating certain symbols or scattering symbols on the reels. Once triggered, players are presented with an interactive mini-game or bonus round where they have the chance to win additional prizes, including jackpot payouts.
Conclusion
Players can enjoy slots in person at traditional casinos or online from the comfort of home using a PC, mobile phone, or tablet, and both options have been known to pay out massive jackpots.
Slot machine jackpot prizes can be triggered by a number of things, however, the main factors include the random number generator software that is built into every machine and the symbols they produce for players to see. In addition, players may have a better chance of winning a big prize if they opt for games with higher return-to-player percentages and wager the full amount on progressive jackpot slots.

