Odds of Winning an Omaze House, Calculated

Why Omaze does not publish your odds before a draw closes

Omaze’s odds cannot be calculated in advance because the denominator — total entries sold — is not known until the draw closes. This is structurally different from a fixed-pool lottery such as People’s Postcode Lottery, where every active subscriber knows the approximate odds from the published subscriber count.

For each Omaze draw, the entry pool grows continuously from launch until the closing deadline. A draw that launches with low interest could attract a surge of entries following a television advertising campaign, changing the odds significantly in the final days. Omaze does not publish a running entry count or revenue total during the live draw window, so this dynamic is invisible to entrants in real time.

Omaze’s terms and conditions do not specify a maximum number of entries. There is no stated cap, and the draw can in principle attract as many entries as demand allows.

How to estimate Omaze odds from draw revenue

After a draw closes, Omaze sometimes announces the charity donation amount, and media coverage occasionally reports a headline revenue figure. In principle, you could use these to back-calculate roughly how many entries were sold. In practice, the shortcut is less reliable than it sounds.

Omaze guarantees a minimum of £1 million to the charity partner per house draw. It has historically described this as 17% of ticket revenue, but its current terms lead with the £1 million floor rather than a fixed percentage, and on a large, well-selling draw the effective share can fall to low single digits of total spend (Omaze T&Cs, July 2026). That means dividing an announced donation by 0.17 will understate total revenue whenever a draw performs better than the historical average — sometimes by a wide margin.

What you can do instead: look for a revenue or entries figure Omaze has stated directly, in its own press releases or in credible media coverage of that specific draw. Omaze UK Limited’s accounts, filed at Companies House under company number 12056935, give a sense of overall annual revenue scale, though they do not break figures down by individual draw. Treat any number you calculate yourself as a rough estimate, not a precise count, and always prefer a figure Omaze has published over one you have derived.

How do Omaze odds compare to other draws?

Draw type	Typical odds per entry	Notes
National Lottery (Lotto)	around 1 in 45 million per line	Fixed; published by Allwyn (nationallottery.co.uk)
People’s Postcode Lottery	varies by draw and postcode uptake	Not a single fixed figure; check postcodelottery.co.uk for the current draw
Omaze house draw	not published; varies by draw	Omaze does not release entry totals (see estimation method above)
EuroMillions	around 1 in 139 million per line	Fixed; published by Allwyn

Omaze’s estimated odds sit at a very different scale from national lotteries — likely better per individual entry than EuroMillions or Lotto — but the prize is also a specific property rather than a cash jackpot, and the entry cost structure (bundles, not single £2 lines) is different. Direct comparisons are valid only if you hold the prize type and cost per entry constant.

Does buying more entries materially improve your odds?

Yes, proportionally. Ten entries give you ten times better odds than one entry. But proportional improvement does not mean practically useful improvement when the baseline is 1 in several million. Spending £100 rather than £10 gives you roughly ten times the odds (assuming a linear bundle structure), but moves you from, say, 1 in 600,000 to 1 in 60,000 — still very long odds by any measure.

There is no spend threshold at which an Omaze entry becomes a statistically favourable bet. The expected return on every entry is negative because the operator retains a margin. This is true of all prize competitions and lotteries.

Do free entries affect the odds for paying entrants?

Yes, mathematically. Every free postal entry added to the pool slightly dilutes the odds for all other entrants. In practice, the volume of free postal entries relative to paid entries is unknown — Omaze has not disclosed this ratio for any draw. Given that pools typically run into the millions of entries, the practical effect on any individual’s odds is negligible.

Why can’t Omaze publish fixed odds the way a society lottery does?

The two products are regulated differently. Society lotteries — such as People’s Postcode Lottery, the Health Lottery and hospice lotteries — are licensed by the Gambling Commission under the Gambling Act 2005, which sets a statutory minimum of 20% of proceeds to good causes and requires the kind of transparency that lets subscribers see how their odds are structured. Prize competitions like Omaze are not lotteries and are not Gambling Commission-licensed. They are regulated instead under consumer protection law, and their core legal obligation is to maintain a genuine free entry route, not to publish live odds.

That structural difference explains why you can find a fixed odds figure for the National Lottery or EuroMillions on the operator’s own site, but not for an Omaze draw. It does not mean Omaze is operating outside the law — only that the rules it follows are different from the rules a licensed lottery follows. For a broader look at how the charity share compares across formats, see our guide to how much goes to charity.

The bottom line on Omaze odds

Omaze is a prize competition with very long odds and a large, tangible prize. The lack of published entry numbers makes pre-draw odds calculations impossible; post-draw estimation from charity donation figures is the most reliable method available to the public.

For context on what winning would actually mean in practice — including tax, mortgage implications and running costs — see our guide to what happens if you win an Omaze house.

For the full picture on how Omaze draws are run, see our Omaze review.