Oz Lotto
Oz Lotto runs twice weekly across Australia. This guide breaks down the mechanics, prize tiers, odds, and the maths that shape your chances.
How Oz Lotto Works
You pick six numbers from a pool of 45. The draw machine selects six winning numbers, then two supplementary numbers from the remaining 39. Your ticket wins a prize if your six numbers match any combination of the winning six, or if some of your numbers match the winning six and supplementary balls combine to create a valid prize tier.
The game structure is straightforward: match more numbers, win a better tier. Supplementary balls do not create division 1 wins, but they play a role in divisions 2 through 7, expanding the ways you can win without matching all six main balls.
Each draw takes place at 8:30 PM AEST on Tuesday and Thursday nights, so there are 104 draws per calendar year.
Prize Tiers & Odds Breakdown
Oz Lotto has seven prize divisions. The odds shift based on how many of your numbers align with the draw result and supplementary balls. Here is the structure:
Division 1: Match all six winning numbers. This is the jackpot tier and the rarest win. You share the division 1 pool with any other division 1 winners that draw.
Division 2: Match five winning numbers plus one or both supplementary balls. This is the second-highest tier.
Division 3: Match five winning numbers. Significant prize, but easier to achieve than divisions 1 or 2.
Division 4: Match four winning numbers plus one or both supplementary balls.
Division 5: Match four winning numbers. This is where the bulk of non-jackpot wins cluster.
Division 6: Match three winning numbers plus one or both supplementary balls.
Division 7: Match three winning numbers. The most frequent prize tier, but the smallest payout.
Prize money is distributed as a percentage of total ticket sales for each draw. A larger jackpot does not guarantee a larger division 2 or 3 prize. All divisions except the jackpot use a fixed percentage of the prize pool, so payouts vary by draw.
Overall Odds & Expected Value
The odds of winning any prize in Oz Lotto are approximately 1 in 84. This means that across all seven divisions, roughly one in every 84 tickets will return a payout.
The odds of hitting division 1 are roughly 1 in 45 million. Divisions 6 and 7 (three-number matches) occur far more often, but payouts are small relative to stake. Division 5 (four numbers) sits in the middle and represents a common moderate-prize outcome.
Expected value is negative across all lottery games, including Oz Lotto. The operator retains a margin (typically 40-50% of sales) to cover administration, retailer commissions, and regulatory fees. For every dollar wagered, your expected return is 50-60 cents across all tiers. This gap is the cost of entry and the funding mechanism for large jackpots.
If you play regularly, syndicate maths matter. A 10-person syndicate reduces the cost per share and increases your ticket volume, raising the statistical likelihood of a division 5-7 win over time. It also divides large wins by share count, so division 1 is split ten ways. Syndicate play trades bigger occasional payouts for more frequent smaller returns.
History & Operator
Oz Lotto began in 1994 and is operated under the authority of the Lotteries Council of Australia, a body representing state and territory lottery commissions. This multi-jurisdictional structure means that Oz Lotto is run across all Australian states and territories, with draws conducted under strict regulatory oversight.
The lottery has run continuously for three decades. Game rules have been stable, though prize structures and draw timing have been adjusted over time to maintain player engagement and operator viability.
Draw Timing & Scheduling
Draws occur every Tuesday and Thursday at 8:30 PM AEST. Results are announced shortly after the draw closes. Tickets must be purchased before the draw cutoff on each draw night, typically 7:30 PM AEST, depending on your state or retailer.
This twice-weekly cadence creates 104 draw opportunities per year, higher frequency than many other lotteries. More draws mean more chances to win small prizes, but the division 1 jackpot odds remain the same on each draw.
Taxation in Australia
Lottery winnings in Australia are not subject to income tax or capital gains tax. This applies regardless of prize tier. A division 1 jackpot win is tax-free, as is a division 7 win of a few dollars. This is a key difference from gambling income in other jurisdictions and reflects Australian tax law treatment of lotteries as games of chance rather than income-generating activities.
Conversely, expenses or losses from lottery play cannot be claimed as deductions. The tax-free status applies only to the win itself.
Frequently Asked Questions
What are the odds of winning each division in Oz Lotto?
Division odds vary by tier. Division 1 (all six numbers) is roughly 1 in 45 million. Division 7 (three numbers) is much more frequent. The overall odds of winning any prize across all seven divisions are approximately 1 in 84. Exact odds depend on the number of tickets sold and whether supplementary numbers create multiple winners in a given draw.
How do supplementary numbers work in Oz Lotto?
Two supplementary numbers are drawn after the six main winning numbers. They cannot be part of your main six pick. Supplementary numbers matter in divisions 2, 4, and 6. Division 1 requires only the six main numbers. For example, if you match five main numbers plus one supplementary, you win division 2. If you match four main plus one supplementary, you win division 4.
What happens to the prize pool if multiple players win division 1?
The division 1 prize pool is shared equally among all division 1 winners in that draw. If two players match all six numbers, each receives 50% of the division 1 pool. Divisions 2-7 are fixed percentages of total sales, so they are not affected by the number of division 1 winners.
Is Oz Lotto winnings taxable in Australia?
No. Lottery winnings in Australia are tax-free under Australian tax law. This applies to all prize divisions, from division 1 jackpots down to division 7. You do not owe income tax or capital gains tax on your winnings. However, you cannot claim lottery losses as deductions.
How often does Oz Lotto draw?
Oz Lotto draws twice per week: Tuesday and Thursday evenings at 8:30 PM AEST. This creates 104 draws per calendar year. Ticket purchase cutoff is typically 7:30 PM on each draw night, though this may vary by state or retailer.
What is the expected return in Oz Lotto?
Lotteries return 50-60 cents on average for every dollar wagered across all prize tiers. This means the operator retains 40-50% of sales to cover costs, commissions, and regulatory fees. Expected value is negative, which is the structural reality of lottery play. Playing in a syndicate does not improve expected value but increases ticket volume and frequency of lower-tier wins.
