Aus. Saturday Lotto
Australia's Saturday Lotto is a national lottery run by Lotteries Australia. It draws twice weekly and uses a straightforward pick-6 from 45 structure with supplementary balls that create additional prize opportunities.
How the Game Works
You select 6 numbers from a pool of 1 to 45. On draw day, the lottery machine draws 6 winning numbers plus 2 supplementary balls. Your ticket wins a prize if your 6 numbers match any combination of the drawn numbers and supplementary balls, depending on the prize tier.
The supplementary balls matter because certain prize divisions use them. This is why Saturday Lotto has seven prize divisions instead of five. Division 1 is the jackpot, which requires all 6 main numbers. Division 7 is the smallest prize and uses a different combination structure.
You can play a single line for one draw or a system entry, which generates multiple combinations from a larger selection of numbers. System entries increase your cost but cover more combinations in a single transaction.
Prize Divisions and Odds
Saturday Lotto has seven divisions. The odds and prize structure depend on how many numbers you match and whether supplementary balls are involved.
Division 1 requires all 6 main numbers. The Division 1 jackpot starts at a set amount and grows if no one wins. Division 2 is all 6 numbers plus one supplementary. Division 3 is all 6 numbers without supplementary involvement. Division 4 is 5 numbers plus one supplementary. Division 5 is 5 numbers. Division 6 is 4 numbers plus one supplementary. Division 7 is 4 numbers only.
Your odds of winning at least one prize in Saturday Lotto are approximately 1 in 87. This is significantly better than many international lotteries but still reflects the low probability of matching 6 numbers from 45. The odds worsen as you move toward higher divisions.
Prize amounts for divisions 2 through 7 are fixed by the lottery operator. Division 1 is the exception: it is a pari-mutuel pool, meaning the actual amount depends on total ticket sales and the number of winners.
Draw Schedule and Timing
Saturday Lotto draws occur on Saturday nights. The draw time is set by Lotteries Australia and does not change. Results are published shortly after the draw closes.
Lotteries Australia also runs a Wednesday draw using the same rules and format, so players can enter the game twice per week if they wish. Each draw is independent, and you must purchase a ticket for each draw you want to enter.
History and Operator
Saturday Lotto has operated in Australia for decades under various state lottery authorities. Lotteries Australia coordinates the game across states and manages draw operations and regulation. The lottery is licensed and regulated under Australian gambling law, which varies slightly by state but maintains consistent rules for the game itself.
The game is not run by a private company but by government-backed lottery authorities. Revenue from ticket sales funds state services, particularly education, healthcare, and community programs. This structure is common across Australian lotteries.
Odds, Expected Value, and Syndicate Math
The overall odds of winning any prize are 1 in 87. This means that across all seven divisions, roughly one in every 87 tickets will return some payout. However, most of these wins are small. Division 7 (4 numbers only) occurs frequently, but the prize is usually between 10 and 20 Australian dollars, which does not cover the cost of a standard entry.
Expected value for Saturday Lotto, like all lotteries, is negative. On average, tickets return less than their cost as profit to players over time. The larger the jackpot grows, the closer the expected value approaches breakeven, but it rarely becomes positive unless the Division 1 prize reaches very high levels.
Syndicates pool money across multiple players, which lets a group purchase more combinations and increase the chance of winning something. However, syndicates do not change the underlying odds or expected value. They reduce the per-person cost and distribute any winnings across members. A 10-person syndicate playing 10 lines per draw has the same total odds as one person playing 10 lines, but each person owns 1/10 of the expected return.
Tax Treatment
In Australia, lottery winnings are not subject to income tax. If you win Division 1 or any other prize, you receive the full amount without federal or state income tax deductions. This differs from many other countries where lottery winnings are taxable income.
However, prize amounts are sometimes subject to GST (Goods and Services Tax) in some states, though this is rare and typically applies only to specific prize categories or promotional draws, not standard Saturday Lotto divisions. Your lottery retailer or Lotteries Australia can confirm the exact tax status of your jurisdiction.
Frequently Asked Questions
What's the difference between the 6 main numbers and the 2 supplementary balls?
The 6 main numbers are the core draw. Matching all 6 wins Division 1 (jackpot). The 2 supplementary balls are drawn separately and are used only in specific prize divisions. For example, Division 2 requires all 6 main numbers plus one supplementary ball. Supplementary balls let you win prizes even if you don't match all 6 main numbers exactly.
Can I win a prize with 4 numbers?
Yes. Division 7 is 4 numbers only, and Division 6 is 4 numbers plus one supplementary ball. These are the smallest prize divisions but the most common. A Division 7 win typically returns between 10 and 20 dollars, which is less than the cost of the ticket, so over many draws the losses add up.
What is pari-mutuel in the context of Saturday Lotto?
Pari-mutuel means the Division 1 jackpot is not a fixed amount. Instead, it comes from a pool of money collected from all tickets sold. When multiple players win Division 1, they split the pool equally. When no one wins, the jackpot rolls over to the next draw, so the pool grows. Divisions 2 through 7 have fixed prize amounts regardless of how many winners there are.
What are my actual odds of winning anything?
Your odds of winning any prize in Saturday Lotto are 1 in 87. This sounds better than the odds of Division 1 alone (roughly 1 in 8 million), but most of these wins are small Division 6 and 7 prizes that return less than your ticket cost. A single $1.50 ticket has a 1 in 87 chance of winning something, but the expected payout is under $0.50.
How does a syndicate improve my chances?
A syndicate does not improve your mathematical odds of winning. If 10 people pool money and buy 10 lines together, the group has the same odds as one person buying 10 lines. The benefit is cost sharing: each person pays less per draw and wins a share of any prize instead of winning the full amount alone. Syndicates spread risk and cost but not probability.
Are lottery winnings taxed in Australia?
No. Lottery winnings in Australia are not subject to income tax at the federal or state level. You receive the full amount of your prize. This is a significant advantage compared to countries like the United States, where lottery winnings are taxed as income.
