Pokies Volatility Explained

Start with two cabinets side by side in the same room, built by the same manufacturer, designed to return the same fraction of everything staked on them over the enormous run of play described on our page about the return figure. On paper they are twins. In practice one of them will give you a steady, chatty hour of small results and modest dips, and the other will take your money in near-silence for twenty minutes, then do something startling, then go quiet again. Nothing is wrong with either. They differ in volatility, which is the shape of the distribution rather than its centre.

Machine A, lower volatility

Small prizes land often. The credit meter drifts rather than plunges. Big results are rare and not very big.

Machine B, higher volatility

Long stretches of nothing, punctuated by occasional results much larger than anything A produces.

What they share

The same designed long-run return, and the same statutory ceilings on stake and prize per spin.

What differs for you

How predictable the hour feels, and how fast a set amount of money is likely to disappear.

What the word denotes

Volatility, or variance — the terms get used interchangeably in gaming rooms and mean close enough to the same thing — is a measure of spread. It describes how widely individual results scatter around the average. A game with low spread produces results clustered near the middle; a game with high spread produces results that are mostly below the middle with a thin tail of results far above it.

The crucial point is that the two properties are independent. Knowing a game's long-run return tells you nothing about its spread, and knowing its spread tells you nothing about its return. They are different facts about the same design, and because the industry advertises one and rarely quantifies the other, most people arrive with half the picture and the less useful half at that.

An hour on a lower-volatility game

It feels busy. Something lands every few spins — often less than the stake, so the meter is still going down, but it goes down in small steps with frequent small reversals. The pace feels sustainable, you get a reasonable amount of play for the money, and you are rarely more than a few spins from some kind of result.

The flip side is that the ceiling is low. Lower-volatility games do not generally produce the sort of result people drive home talking about. If you sat down hoping for something dramatic, a steady game will not supply it no matter how long you stay, and the frequent small returns can keep a session running far longer than intended, which is its own cost. A busy machine is not a cheap machine; it is a slow one.

An hour on a higher-volatility game

It feels like nothing is happening, because for long stretches nothing is. The meter falls fairly steadily, interrupted rarely. Most sessions on a high-spread game end with the money gone and nothing much to report, and a minority end with a result several times anything the steady machine could produce. That minority is what the design is for and it is why these games exist.

What catches people out is the emotional arithmetic. Twenty dead minutes on a high-spread game is the normal operating condition, not a signal, and it is not information about what comes next — every spin is independent, which is the subject of how the random number generator works. The feeling of being "overdue" grows most strongly in exactly the games where it is least justified.

What it does to the money you brought

This is the practical pay-off and the only reason the concept is worth a visitor's attention. Suppose you decided at home that tonight costs forty dollars. On a lower-volatility game, that forty dollars will probably last close to what simple arithmetic suggests — stake per spin divided into the total, a bit longer because of the frequent small returns. On a higher-volatility game, the same forty dollars has a much wider range of outcomes: it might be gone in ten minutes, or it might be propped up unexpectedly by one result and last the evening.

So the spread is really a statement about predictability of duration. If a certain amount of play matters to you — because you are waiting for a table, or because the drive back over the hills to Eden Valley means you want a contained hour rather than an open-ended one — a steadier game serves that aim better. If duration is irrelevant and you are there for the chance of something unusual, the swingier game is the one that offers it, at the price of most evenings being dull.

The decision this actually informs

Here is the whole of it, as a thing to settle before you walk into a gaming room rather than inside one. Decide which you want: a long, steady, cheap-per-minute hour, or a short, lurching one with a thin chance of something memorable. Then look at the games in front of you and match them, using the paytable rather than the artwork.

Reading it is not hard once you know what to look for. A paytable whose top prizes tower over its middle ones, with features that trigger rarely, describes a high-spread game. A paytable with a compressed range of prizes and frequently triggering features describes a steadier one. The feature set tells you as much as the numbers do — the vocabulary is on our features page, and the arithmetic of what a spin costs is on paylines and ways.

One Angaston caveat. Neither hotel on Murray Street publishes how many machines it holds or which games are installed, so the realistic position is that you will choose from whatever is there on the night, possibly from a small selection. That is a reason to understand the idea in advance rather than to plan around a specific cabinet. Both venues are described on our Angaston page.

Why you will find no ratings on this site

Plenty of pages assign games a volatility score out of five. We do not, for two reasons. The first is that no such rating is published or standardised by manufacturers or by the regulator, so any number of that kind has been assigned by whoever wrote the page, usually from impressions. The second is that the figure would be useless even if it were real, because it says nothing about the cabinet in front of you, whose configuration is a matter between the venue, its gaming supplier and Consumer and Business Services SA.

What is genuinely fixed and statewide is narrower than people expect: the Gaming Machines Act 1992 caps the stake a machine may take for one spin and the prize it may pay for one spin, identically in every pub and club in South Australia. We print neither amount here — those are figures to confirm with Consumer and Business Services SA rather than to take from an article. Note that the cap limits one transaction and has no bearing on spread; a tightly clustered game and a wildly swingy one sit under the same ceiling.

How this page was put together

Everything above is general design behaviour that holds for approved gaming machines wherever they are installed, which is why it can be written honestly without reference to any particular room. The statutory per-spin limits are in the Gaming Machines Act 1992 and the current amounts are held by Consumer and Business Services SA. Deliberately absent: any volatility rating, any return percentage, and any claim about the games installed at either Angaston venue, none of which is published by anybody we could cite. Reviewed 10 October 2026.