Irish Lotto

How the Game Works

Players select 6 numbers from a pool of 47. The Irish Lotto conducts a draw three times per week (Wednesday, Saturday, and Sunday). Six numbers are drawn as the main winning combination, followed by a supplementary bonus ball drawn from the remaining 41 numbers.

To win a prize, your selected numbers must match the drawn numbers. The bonus ball applies only to specific prize tiers and increases the payout for certain combinations. For example, matching five of the main six numbers plus the bonus ball constitutes a different prize tier than matching five main numbers without the bonus.

The game structure creates seven distinct prize tiers. The jackpot (tier 1) requires all six numbers to match. Lower tiers involve matching fewer numbers, with and without the bonus ball included in the prize conditions.

Prize Tiers and Odds

The Irish Lotto publishes the following prize division structure:

Tier 1 (Jackpot): Six numbers match. The jackpot is not fixed; it rolls forward if not won in a draw. The overall odds of winning any prize in a single line are approximately 1 in 10.3.

Tier 2: Five numbers plus the bonus ball match. This tier requires both exact number matching and the bonus ball alignment.

Tier 3: Five numbers match (bonus ball not required). This tier is won more frequently than tier 2 because it does not depend on the bonus ball.

Tier 4: Four numbers plus the bonus ball match.

Tier 5: Four numbers match.

Tier 6: Three numbers plus the bonus ball match.

Tier 7: Three numbers match. This is the most frequently won tier and carries the smallest payout.

Prize amounts vary by draw because the Irish Lotto uses a pari-mutuel distribution model for most tiers. This means the total prize pool is divided among winners in each tier, so your payout depends on how many other tickets match the same tier in that draw.

Draw Schedule and Timing

The Irish Lotto conducts three draws per week on fixed days: Wednesday evening, Saturday evening, and Sunday evening. Each draw occurs at a set time, and results are published immediately after the draw closes.

Ticket sales for each draw close at a specific time before the draw begins, typically around 7:45 PM on draw days, though players should confirm exact cutoff times through the official retailer or platform. The draw itself is conducted under the observation of independent auditors and broadcast or streamed for public verification.

The three-draw-per-week frequency means players have multiple opportunities per week to enter, but each entry is independent; buying multiple lines increases the number of combinations played, not the probability of any single combination winning.

Operator, History, and Regulation

An Post National Lottery, the state-controlled operator, has managed the Irish Lotto since its introduction on April 20, 1988. The lottery operates under legislation and is overseen by the Department of Public Expenditure and Reform, which sets rules for game design, draw procedures, and prize distribution.

The Irish Lotto is part of the broader National Lottery scheme in Ireland, which also includes other games. All draws are conducted transparently, with independent auditors present to verify the integrity of each draw. The operator publishes aggregate statistics on prize distribution and unclaimed prizes.

Mathematical Context and Odds

The overall odds of winning any prize on a single line are approximately 1 in 10.3. This is the probability that at least one of your six numbers will match the draw in a qualifying way (either through the main draw or the bonus ball).

The expected value of a lottery ticket depends on the current jackpot size and the distribution of money to lower tiers. In most draws, the expected return is less than the ticket price, meaning players lose value on average. This is standard for national lotteries, as the operator retains a percentage for administration and public funds.

Syndicates (groups of players pooling money) do not change the mathematical odds for any individual number combination, but they do increase the total number of combinations played with the same outlay, which statistically increases the chance that at least one syndicate line will win a prize at some tier. The trade-off is sharing any winnings across members.

Tax Treatment

In Ireland, National Lottery prizes, including Irish Lotto winnings, are exempt from income tax. Winners do not pay tax on the prize amount itself. However, any interest or investment returns generated after the prize is received are subject to Irish tax law in the normal way.

Players outside Ireland may face different tax obligations depending on their residence and local tax law. Winners are responsible for understanding their own tax position.