Definition
Lottery
Also known as Lotto, Draw Game, National Lottery
By Abhinav VasudevanReviewed Editorial policy
In short
A lottery is a draw-based game where numbered tickets compete for prizes funded from ticket sales. Takeout is typically 40% to 50%, making lotteries the worst-value common form of gambling by a wide margin.
A lottery draws numbers at random and pays prizes to matching tickets. It is structurally pari-mutuel: the money comes from ticket sales, the operator and good causes take a share, and the rest is distributed.
The takeout is the headline fact
| Product | Typical return to player |
|---|---|
| Blackjack (basic strategy) | 99.5% |
| European roulette | 97.3% |
| Online slots | 94–97% |
| Sports betting | 95% |
| Lottery | 50–60% |
Lotteries return roughly half of what is staked. In the UK, National Lottery proceeds are split approximately 50% prizes, 25% good causes, 12% duty, with the remainder to retailers and operating costs.
The good causes portion is genuine and substantial. It is also the reason the takeout is so high, and it means a lottery ticket is partly a bet and partly a voluntary tax.
The odds
A 6-from-49 draw has 13,983,816 possible combinations. Your chance of matching all six with one ticket is 1 in 13,983,816.
Some useful comparisons for that scale:
- Roughly 1 in 14 million is about the chance of picking one specific person from the population of Britain twice in a row from a shuffled deck of everyone. The number is not intuitively graspable, which is part of why it sells
- Buying 100 tickets moves you to 1 in 139,838, still negligible, at 100 times the cost
Why jackpots do not fix it
A rollover genuinely improves expected value, because the accumulated money came from previous draws.
In principle a jackpot large enough makes a ticket positive expectation. In practice two things intervene: large jackpots attract far more ticket sales, which sharply raises the chance of splitting the prize, and the annuity structure plus tax reduces the headline figure substantially.
Analyses of large American jackpots consistently find that the split risk cancels most of the rollover benefit.
What it is actually for
Lotteries are entertainment with an extremely long-shot payoff and a charitable component. On that basis a weekly ticket is a small, harmless expenditure.
As a financial proposition it is the worst commonly available bet, and the gap between it and everything else is not close.
Common questions
What percentage does a lottery pay back?
Around 50% to 60%, far worse than any casino game. UK National Lottery proceeds split roughly 50% prizes, 25% good causes and 12% duty, so a ticket is partly a bet and partly a voluntary tax.
What are the odds of winning the lottery?
A 6-from-49 draw has 13,983,816 combinations, so one ticket gives 1 in about 14 million. Buying 100 tickets moves you to 1 in 139,838, which is still negligible at 100 times the cost.