Fixed vs progressive jackpots

Fixed vs progressive jackpots: the short answer

A fixed jackpot slot has a top prize that is written into the paytable. It might be a cash figure or, more often online, a multiple of your stake such as 1,000× or 2,500×. It is paid from the same pot as every other win, so it doesn’t reduce the base game’s returns any more than any other prize.

A progressive jackpot slot sets aside a small percentage of every stake into a growing prize. The jackpot starts from a seed, rises as people play and drops back to the seed when it is won. Because that percentage is part of the RTP, the rest of the game returns less. You are effectively paying a little on every spin for a ticket in a draw.

How a fixed jackpot works

A fixed jackpot is just the biggest prize in a paytable. On a line game it might be five of the top symbol on a payline; on a hold-and-win game it is often a named prize such as ‘Mega’ that is a fixed multiple of the stake. Wolf Gold is a well-known example: its hold and win style Money Respin feature has Mini, Major and Mega jackpots, and the slot’s listed 2,500× maximum win includes the fixed Mega jackpot.

Because a fixed prize scales with stake, its value in pounds depends on what you bet. At 10p, 2,500× is £250; at £2 it is £5,000; at £5 it is £12,500. The developer has already priced that prize into the game’s overall RTP, which for Wolf Gold is listed at 96.01%. Nothing about the prize changes with how much other players have staked or how long since it last landed.

How a progressive jackpot works, step by step

1. The operator or supplier sets a jackpot seed, the starting amount the pot returns to after each win.
2. Every qualifying spin sends a fixed percentage of the stake to the pool. This is the jackpot contribution.
3. The pool grows on screen. On a network, stakes from many casinos feed the same pool, which is why network jackpots grow fastest.
4. The jackpot is triggered by a rare event: a symbol combination, a random award or a jackpot wheel bonus.
5. The winner receives the current amount and the pool returns to the seed value. A share of contributions may also fund the next seed.

There are three common set-ups. A standalone progressive grows from one game or machine only. A local or linked progressive is shared by machines in one venue, as in UK casinos. A wide-area progressive is shared across many casinos, which is how online networks such as Games Global’s Mega Moolah or Blueprint’s Jackpot King reach large sums. Our page on how jackpots are funded explains contributions and seeds in more detail, and must-drop jackpot slots cover a variant that must pay before a set time or amount.

The RTP split: what a progressive jackpot costs you

This is the most important number on any progressive slot. The headline RTP often includes the jackpot contribution, but almost no player ever wins the top prize, so the return that shapes a normal session is the base-game figure. Look for both in the help screen. The figures below are from our verified slot facts; several come from review-site breakdowns, so check the casino’s version.

Now apply it. On Divine Fortune, 100 spins at £1 means £100 staked. Including the jackpot, the long-run average return is £96.59, an average cost of £3.41. But without the jackpot the base game returns £92.52, so a session that doesn’t win the top prize, which describes almost all of them, has an average cost nearer £7.48. On Mega Moolah, 100 spins at 25p is £25 staked; the 88.12% base return gives about £22.03 back on average, a base-game cost of about £2.97.

Jackpot odds and stake size

Developers rarely publish the chance of winning a progressive, and we don’t quote unverified figures. What the rules do tell you is how stake affects it. On some progressive games the chance of reaching the jackpot feature rises in proportion to the stake, so a £1 spin has ten times the chance of a 10p spin; on others, only bets at or above a set level qualify. The help screen must explain this before you play, under the Commission’s RTS 3 standard on rules and the likelihood of winning (opens in a new tab). Our question on the odds of winning a slot jackpot explains why those odds are long.

Fixed jackpots are simpler: the chance is the same at any stake and the prize scales up. Neither type becomes ‘due’ as it grows. A large progressive pot only means it hasn’t been won for a while; the odds per spin are set by the game, not by the size of the pool.

Fixed vs progressive jackpots on UK casino and pub machines

In venues, jackpots are limited by the machine’s category. The Gambling Commission’s B1 gaming machines page (opens in a new tab) sets a £5 maximum stake and a £10,000 maximum prize for Category B1, the casino-only machines, or £20,000 for a linked progressive jackpot on a premises basis only. That means a progressive on a UK casino floor can be shared only between machines in the same casino; there are no wide-area land-based networks of the American kind.

On a pub Category C machine the £100 top prize is effectively a fixed jackpot. The draft machine technical standards published for consultation in 2025 require live jackpot values to be shown at all times, and linked progressives have their own technical standard. For the land-based side, see linked progressives.

A short history of progressive jackpots

Progressive jackpots were introduced in large casinos in 1986, according to Wikipedia’s progressive jackpot article (opens in a new tab). The best-known early system is IGT’s Megabucks in Nevada. Sources describe it differently: the progressive jackpot article calls Megabucks the first progressive slot machine, while the article on IGT calls Nevada Megabucks the first wide-area progressive, with a $1 million base jackpot. The second description is the more careful one. The first Megabucks jackpot, $4,988,842.17, was won on 1 February 1987. Our pages on Megabucks and progressive jackpot history have the detail.

Fixed top prizes are older still: every early reel machine had a highest-paying line, and the British fruit machine’s top prize has always been set by law for its category.

Myths about fixed and progressive jackpots

• ‘A big progressive is about to drop.’ The pot size reflects time since the last win, not a rising chance. Must-drop jackpots are the exception, and their rules state the deadline openly.
• ‘Progressive slots have a better RTP because of the jackpot.’ Usually the reverse: the contribution comes out of base-game returns.
• ‘The casino can stop a jackpot paying.’ Prizes are set by the game’s rules and the supplier’s systems; if you think a valid win was refused, use the complaints route. See what happens when a slot jackpot is won.
• ‘Fixed jackpots are smaller, so they’re worse.’ They are paid from the normal RTP, so the base game is often more generous.

Pros and cons of fixed and progressive jackpots

Verdict: fixed or progressive jackpot, by type of player

If you play for entertainment over a set budget, a fixed jackpot game with a strong base-game RTP gives better value per session, because none of your stake is set aside for a prize you are very unlikely to win. If the dream of a huge prize is the point for you, a progressive can make sense, but budget for the lower base return and treat each spin’s contribution as the price of the chance. If you want something in between, network jackpots with smaller tiers, explained in our guide to Jackpot King and jackpot networks, pay their lower prizes more often. For individual matchups, try Mega Moolah vs Mega Fortune or browse the compare hub.

Where to play jackpot slots in the UK

Our partners list jackpot sections, but which progressives are live changes, so search the lobby for a title; our pages on jackpot slots at Coral and jackpot slots at Ladbrokes explain where to look. None of the offers below is played on a progressive jackpot game unless the terms say so.

All offers are for new customers aged 18+, and terms apply. Coral: bet £10 on slots and get 100 free spins at 10p each on selected games, 48 hours to accept and 7 days to use, no wagering on winnings. Ladbrokes: play £10 on slots for up to 500 free spins, 50 a day for 10 days at 10p each on selected games, no wagering. PlayOJO: 80 free spins at 10p on Big Bass Bonanza, a fixed-prize slot, with a first deposit of £10 or more and winnings paid in cash. As Coral and Ladbrokes share an owner, look at the eligibility terms before opening a second account. Winnings are not taxed for UK players, and if play stops being fun the National Gambling Helpline is free on 0808 8020 133.

18+. Gambling should be entertainment that costs money, not a way to make it. Decide a budget before you play: plan a slot budget. Free, confidential help: National Gambling Helpline 0808 8020 133.