Progressive jackpots: how they actually work

1 April 2026 | 3 min read | Author: Emma Hämäläinen, Jackpots and game technology

How a progressive jackpot works and where its share comes from

There is an idea circulating online about secret games ”nobody else knows about”. A casino's game list is public, and every game's numbers are in its own info panel. What the progressive jackpot does contain, however, are things that are genuinely not advertised – and those are worth knowing.

How a progressive jackpot works

A jackpot grows by a share of every stake placed on the game. The share is typically a few per cent, and it is taken out of the base game's return. In practice that means two things:

  • The pot grows with the money wagered, not with the clock. The moment it hits cannot be predicted or timed.
  • The base game's return to player in a jackpot game is often lower than in a comparable game without one. The difference has been moved into the pot.
Claim How it actually is
A jackpot is ”due” when the pot is large The hit is drawn separately on every spin, whatever the pot size
A bigger stake raises the chance of hitting Some games require a full stake to qualify – the condition is in the rules
It hits more often at night A random number generator does not know the clock
There are games others cannot find The list is public; search and filters show everyone the same thing

What to check before a jackpot game

  1. Whether the jackpot requires a particular stake or all paylines.
  2. The base game's return to player, if it is stated separately from the jackpot share.
  3. Whether the pot is local to one casino or shared across several.
  4. Whether a win is paid at once or in instalments.
  5. Whether a withdrawal cap applies to the jackpot as well.

Questions and answers

Are jackpot games worth playing?

They are more expensive in the base game and offer a small chance of a large win. Which matters more is a matter of taste – but it is worth knowing in advance.

Can a jackpot hit be predicted?

No. If it could, the game would not be on offer.

Are some games really exclusive?

A distribution deal can be exclusive. That concerns where a game is offered, not what it costs the player.

Read next

The promises of technology are taken apart in AI and VR in the casino, and limits are covered in Responsible gambling.

Playing at a summer cottage is covered in Playing at the cottage.

Emma Hämäläinen, writer for the Spinay blog
Emma Hämäläinen
Jackpots and game technology

Emma Hämäläinen writes for the Spinay blog on jackpots and game technology: how a progressive pot grows, where the jackpot share comes from, and what technology actually changes.

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