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What Is a Lottery Jackpot Cap?
Lottery jackpots can’t grow forever. A jackpot cap is the maximum a top prize is allowed to reach — and EuroMillions has the most famous one. Here’s how it works.
The EuroMillions cap
EuroMillions caps its jackpot at €250 million. The jackpot grows through rollovers, but once it hits the cap it can’t rise any higher — instead it stays at €250 million for a set number of draws.
What happens at the cap
If the capped jackpot isn’t won within those draws, it becomes a “must be won” situation: the prize then rolls down to the next tier with winners, guaranteeing the money is paid out rather than rolling endlessly.
Why caps exist
Caps keep top prizes within set limits and ensure jackpots are eventually won rather than ballooning indefinitely. For related mechanics see how rollovers work, Must Be Won draws and a EuroMillions Superdraw.
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Frequently asked questions
What is a jackpot cap?
A maximum the jackpot can reach — EuroMillions caps at €250 million.
What happens once the cap is hit?
The jackpot stays at the cap and must be won within a set number of draws.
Why have a cap?
It keeps the top prize within set limits and forces a win rather than endless rolling.
Related guides: a EuroMillions Superdraw, how rollovers work and Must Be Won draws.