Progressive jackpot: what it means in slots
A progressive jackpot is a prize pool that grows with a small share of every stake until someone wins it, then resets to a seed amount.
By Ryan Jessop. Updated .
Key takeaways
- Grows with each stake until won.
- Resets to a seed amount after a win.
- Part of every stake funds it.
- Base game returns less than headline RTP.
How it works
A slice of each stake goes into the pot. Pools can be local to one game or networked across many casinos, which is how some reach millions.
The RTP catch
The contribution to the jackpot is included in the published RTP. Unless you win it, the game you actually play returns less than the headline figure. See RTP explained.
Jackpots and free spins
Welcome free spins are rarely allowed on jackpot games. See jackpot slots.
Back to: the full slot and spins glossary.
Slot figures are developers' published defaults, each confirmed against two sources; your casino may run a lower RTP. Offer terms dated 9 October 2026. How we check. 18+. Free help: 0808 8020 133 or safer gambling.
Frequently asked questions
Does stake size affect jackpot chances?
In some games, yes; the rules say.
Is a progressive jackpot included in RTP?
Yes, which lowers the base game’s effective return.
Can I use free spins on jackpot slots?
Usually not.