The short version
A pokie is the Australian name for a slot machine, short for “poker machine”. An online pokie is the same idea in software: you set a stake, press spin, and the reels land on a result. What decides that result is not the spinning animation you see, which is for show, but a piece of code called a random number generator. Understanding that one part explains almost everything else about how the games behave.
The random number generator
The random number generator, or RNG, runs continuously in the background, producing numbers thousands of times a second whether or not anyone is playing. The instant you press spin it takes the current number and maps it to a combination of symbols. That is the whole draw. The game has no memory: it does not know your balance, how long you have played or whether you just lost ten spins, and no result is ever “due”. Each spin is independent of the last.
At a genuine studio the RNG is tested by an independent laboratory such as iTech Labs, GLI or eCOGRA before a game is released, and the maths is locked into the build. A game that is working correctly cannot tighten after a deposit or loosen to tempt you back; what feels like that is variance, which we come back to below and in our guide on whether online pokies are rigged.
RTP: what the game pays back
Every pokie is built to return a fixed share of everything staked on it over its life. That figure is the return to player, or RTP. A pokie set to 96% returns about A$96 for every A$100 bet across millions of spins; the other 4% is the house edge, the margin the game keeps. Most online pokies sit somewhere around 94% to 97%.
The catch is the phrase “over millions of spins”. RTP is a long-run average, not a guide to your afternoon. A 96% game can take A$200 from you in an hour and still be working exactly as designed. Our RTP guide shows where the figure appears in a game’s info screen and why a version a couple of points lower quietly costs you more.
Volatility: how the wins are spread
Two pokies can share the same RTP and feel completely different, because RTP says nothing about how the returns arrive. That is volatility. A low-volatility pokie pays small amounts often and your balance drifts down slowly; a high-volatility pokie pays rarely but can pay large, and long dry spells are normal. Neither pays back more in the long run at the same RTP: volatility only changes the ride. Our volatility guide covers which suits a small bankroll.
Reels, symbols and paylines
The grid you see is made of reels (the columns) and rows. A win is formed when matching symbols line up in a way the game counts. Older pokies use fixed paylines, set patterns across the grid. Many modern ones use “ways to win”, where matching symbols on adjacent reels pay regardless of row: a 243-ways game, or a Megaways title where the number of ways changes every spin and can reach into the hundreds of thousands. More ways does not mean a higher RTP; the paytable is balanced to the same long-run return.
Bonus features and free spins
Most of a pokie’s character lives in its features. Scatter symbols usually trigger a free-spins round; hold-and-spin (also sold as hold-and-win or link-and-win) locks feature symbols in place while you chase a grid full of them; multipliers raise the value of a win; and some games sell a “buy feature” button that jumps straight to the bonus for a fixed price. These rounds are where a high-volatility pokie earns its reputation, and copied or unlicensed games often imitate a famous feature without the real maths behind it, as the Lightning Link guide shows.
Fixed prizes and progressive jackpots
A fixed jackpot pays a set top prize written into the paytable. A progressive jackpot is different: a slice of every bet across many players, and sometimes many sites, feeds a pool that grows until someone hits it, then resets. Progressives usually need a qualifying bet, and they can only be won on real money. Our jackpots guide explains the types and the trade-off they carry.
How online pokies differ from a pub machine
The maths is the same idea, but the setting is not. A machine in an Australian pub or club is approved and monitored under state law with a minimum theoretical return. An online pokie that accepts Australian players runs offshore, because no Australian licence can be issued for online pokies, as our legal guide explains. That often means a higher advertised RTP and the figure shown in the game, but no local regulator to step in if a withdrawal is delayed or a bonus win is voided. The result is decided the same way; the recourse when something goes wrong is not.
Trying a pokie before you spend
Most studios offer a demo mode that runs the real game on play-money credits, so you can watch the volatility and see how the bonus round behaves before staking anything. It is the cheapest way to learn a game; our free pokies guide covers where demo play is available and its limits, and the real-money guide covers what changes when you switch. Whichever you play, the sums in our pokies tips are worth a look first.
