Progressive jackpot slots have a prize pot that grows with every bet until someone wins it. Some reach millions of pounds, which is a big part of their appeal.
But the jackpot changes how the game pays out the rest of the time. Here’s how progressives work, the main types, and what to check before you play one.
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1How a progressive jackpot grows
A small slice of every stake goes into the jackpot pot. The more people play, the faster it grows. When someone wins, it resets to a starting amount, called the seed, and builds up again.
2The main types
- Standalone: one game at one casino feeds its own jackpot.
- Local or in-house: several games at one casino share a jackpot.
- Network or wide-area: the same game across many casinos feeds one jackpot. These create the biggest prizes.
- Must-drop or daily jackpots: guaranteed to pay out before a set time or before reaching a set amount.
Many games have several tiers, such as mini, minor, major and mega, with the smaller tiers paying out much more often.
3How jackpots affect RTP
The money that feeds the jackpot has to come from somewhere. So the base game, the ordinary spins and features, usually returns less than a non-jackpot slot.
The headline RTP often includes the jackpot contribution. Since almost nobody wins the top prize, the return you’ll actually experience in a normal session is usually lower than the figure suggests. Check the game’s info screen, which often splits the base RTP and the jackpot share. Our guide to RTP and volatility explains why this matters.
4Check how you qualify
Jackpot rules vary between games, so read them before you spin:
- Stake-weighted: in many games, higher stakes give a higher chance of triggering the jackpot.
- Bonus round: some jackpots are won through a separate wheel or bonus game.
- Bonus funds and free spins: these are often excluded from jackpot wins, or can’t trigger the jackpot at all. Check the offer terms.
Remember that UK online slots have stake limits: £5 per spin, or £2 if you’re aged 18 to 24.
5Must-drop jackpots
Must-drop jackpots are more predictable because they have to land by a deadline or a cap. Players sometimes target them as they near the drop point. That can slightly improve your chance, but the jackpot is shared out across all the players, so it doesn’t make the game a good bet. It’s still a slot with a house edge.
6Our jackpot tips
- Treat the top prize like a lottery ticket: enjoyable to dream about, very unlikely to win.
- Check the base RTP, not just the headline figure.
- Read the jackpot rules on stakes and bonus funds.
- Don’t raise your stake beyond your budget to qualify.
- Look at volatility. Jackpot slots tend to have long dry spells.
If you’re playing with a welcome offer, see our guide to free spins to check which games they cover.