Independent site. CasinoCalcs is not affiliated with or endorsed by People’s Postcode Lottery or any other postcode lottery. Game names are used only to describe the rules the maths is based on.
- Maths reviewed by Josh Miller
- Tested by Diana Westfield
A postcode lottery odds calculator answers the question the adverts skip: how often does a postcode actually come up? Not very. With round numbers (800,000 postcodes in play and about 34 prize draws a month) your postcode wins something about once every 2,000 years. The free CasinoCalcs calculator lets you change those inputs, because the real figures move and aren’t published per draw.
Postcode lottery odds, worked through
The draw picks a postcode, not a ticket. So the maths is one line: your chance in a single draw is 1 ÷ the number of postcodes in it. Thirty-four draws a month at 1 in 800,000 gives about 1 in 23,500 for the month.
| Postcodes in the draw | Chance in a month | Chance in a year | Average wait |
|---|---|---|---|
| 400,000 | 1 in 11,765 | 1 in 981 | 980 years |
| 800,000 | 1 in 23,530 | 1 in 1,961 | 1,960 years |
| 1,200,000 | 1 in 35,294 | 1 in 2,941 | 2,940 years |
Those are the odds of any postcode prize. The headline monthly and millions-style prizes are far rarer, because there are only a handful of those draws a year.
Why one ticket or three makes no difference to the odds
Buying a second ticket at the same address doesn’t put your postcode in the hat twice. It just means you’d collect twice when it’s drawn. So the chance stays put and the cost doubles. That’s different from a normal raffle, where every ticket is its own chance.
What £12.50 a month adds up to
At £12.50 a month, a year costs £150. The calculator’s last line is the sobering one: on the defaults you’d spend about £294,000 on tickets, on average, before your postcode came up. Nobody plays that long, which is the point. At least a third of the price goes to charities, and that’s the honest reason to play. If you’re playing for the money, the lottery expected value calculator shows how other draws compare, and the lottery odds calculator covers number games.
The real pull is social. If a street prize lands on your postcode, everyone who plays there collects, and the one house that doesn’t hears about it for years. That fear of missing out is worth knowing about, because it’s doing the selling.
How often has my postcode won?
The operator lists recent winning postcodes on its site, so that’s the place for your own history. What the maths can tell you is how often a postcode should come up. On the default numbers, any given postcode wins a daily-type prize about once every 2,000 years, so a postcode that’s won twice in a decade is lucky, not special, and one that’s never won is completely normal. Every draw starts fresh, and past wins don’t make a postcode more or less likely. How the draws and prizes work is explained in how the postcode lottery works.
A charity lottery is still a lottery. BeGambleAware.org has free, confidential help if playing stops being fun.