Key takeaways
- Fixed: a set top prize.
- Progressive: grows with play.
- Part of the RTP feeds the pot.
- Odds are very long.
In shortA fixed jackpot is a set top prize. A progressive jackpot grows as a small share of every stake is added, until someone wins it.
Kinds
| Type | How it works |
|---|---|
| Fixed | A set multiple of the stake |
| Local progressive | Grows from play at one casino or venue |
| Network progressive | Grows across many casinos |
| Must-drop | Set to pay before a stated amount or time |
The effect on RTP
If a progressive machine returns 94% and four points of that is jackpot contribution, the game you actually play returns about 90% unless the jackpot lands.
Max win is not a jackpot
| Slot | Max win | At a £5 stake |
|---|---|---|
| Sweet Bonanza | 21,100x | £105,500 |
| Gates of Olympus | 5,000x | £25,000 |
| Book of Dead | 5,000x | £25,000 |
| Fishin' Frenzy | 5,000x | £25,000 |
| Fluffy Favourites | 5,000x | £25,000 |
| Big Bass Bonanza | 2,100x | £10,500 |
| Starburst | 500x | £2,500 |
Arithmetic from published maximums.
Keep reading: The Liberty Bell, Fishin' Frenzy slot machine, Slot machine odds and The random number generator.
How a jackpot is triggered
Usually at random, sometimes through a bonus wheel or by collecting symbols. On most progressives a larger stake gives a proportionally better chance, so the cost per chance is the same whatever you stake.
Seed and reset
After a win the pot resets to a seed amount funded by the operator or developer, then climbs again. A pot far above its usual level is better value than one just reset, though still a long shot.
Go further: Three-reel vs five-reel slot machines, The feature trail and Book of Dead vs Gates of Olympus.
In other words
Jackpot slots, progressive slots, progressive jackpots and must-drop jackpots are the usual terms. A 'max win' is a different thing.
Keep reading: 10bet Casino slot machines, The lucky seven, Cluster pays slot machines and Volatility.
Slot figures are developers' published defaults, each confirmed against two sources; the version at your casino can differ. UK land-based stake and prize limits and online rule dates were checked against Gambling Commission and licensing authority sources on 6 October 2026. History follows commonly cited accounts. Offer terms dated 5 October 2026. How we check. 18+. Free help: 0808 8020 133 or safer gambling.
Frequently asked questions
What is a progressive jackpot?
A prize that grows with every stake.
Do jackpot slots pay less?
The base game usually does.
What are the odds?
Very long.
Is max win the same as a jackpot?
No.