Players fund progressive jackpots themselves: a small slice of every bet goes into the prize pool, which grows until a randomly chosen spin triggers it. Your odds of landing the top prize are tiny. In our model game, where it averages €1,000,000, you would need about 380 years of 500 spins a day for a 50/50 chance of winning it.
That is not a reason to never play one, but it is worth knowing what you are buying: a few per cent of every bet goes into a draw you will almost certainly never win, and the rest of the game pays back less than a regular slot. Here is how these jackpots work, what they really cost, and what happens if you do win.
How does a progressive jackpot work?
On every spin, the game takes a fraction of the bet and adds it to the prize pool shown on screen. When someone wins, the pool resets to a guaranteed seed amount, which is also funded by bets. The trigger is decided by the game’s random number generator, like any other win: no jackpot is ever “due”, and the amount on display tells you nothing about when it will drop.
| Jackpot type | Who feeds the pool | What to know |
|---|---|---|
| Fixed | Nobody: the amount never changes | Not a progressive jackpot, just the game’s top prize (often a multiple of the stake) |
| Local | Players at a single casino, or on a single game | Smaller pool that drops more often |
| Networked | Players at every casino that offers the game | The multi-million pools, such as Mega Moolah or the Age of the Gods series |
| Tiered | One bet, split across several pools | Mini, Minor, Major, Grand (names vary): the small tiers drop often, the top one almost never |
| Must-drop | Players on the game or the network | Has to drop before a displayed amount or time; you compete with everyone playing at that moment |
Mega Moolah, the best-known example, combines several of these: four networked progressive jackpots (Mini, Minor, Major and Mega), awarded through a wheel that triggers at random. Its published RTP of around 88% shows what the pool costs: a regular slot sits closer to 96%.
Who pays for the jackpot? The RTP split in numbers
Providers do not publish their jackpot odds. To run the numbers, we built a model game (not a real title) with realistic orders of magnitude: a total RTP of 96%, made up of 93.5% for the base game and 2.5% of every bet going into four pools. Odds are for a €1 bet:
| Tier | Share of bets | Odds per spin | Average payout | Chance in 500 spins | Chance in 1 year |
|---|---|---|---|---|---|
| Mini | 0.5% | 1 in 2,000 | €10 | 22.1% | 100% |
| Minor | 0.5% | 1 in 50,000 | €250 | 1% | 97.4% |
| Major | 0.5% | 1 in 1,000,000 | €5,000 | 0.05% | 16.7% |
| Grand | 1% | 1 in 100,000,000 | €1,000,000 | 0.0005% | 0.18% |
Average payout = share of bets × stake ÷ odds: what the pool is worth on average when it drops. “1 year”: 500 spins a day for 365 days, i.e. 182,500 spins.
The one calculation that explains everything: a pool pays out, on average, exactly what players put into it. The Grand averages €1,000,000 because it takes 100,000,000 spins at €1 on average to trigger it, and each spin adds 1 cent. Nobody else funds the jackpot: the 99,999,999 losing spins pay the winner.
The Mini drops in roughly one session in five (22.1% over 500 spins) but only pays €10 on average. These small tiers are what make a game feel like it “pays its jackpots”.
Your real odds of landing the top prize
Take our model’s Grand (1 in 100,000,000 per €1 spin) and a dedicated player who spins 500 times at €1 every day:
| Playing time | Spins | Total wagered | Chance of hitting the Grand | Average loss |
|---|---|---|---|---|
| One session (500 spins) | 500 | €500 | 0.0005% | €20 |
| 1 year (500 spins a day) | 182,500 | €182,500 | 0.18% | €7,300 |
| 40 years (500 spins a day) | 7,300,000 | €7,300,000 | 7.04% | €292,000 |
Probability of hitting the Grand at least once: 1 − (1 − p)n. Average loss at the total RTP of 96%, jackpots included.
Playing every day for 40 years, this player has a 7.04% chance of landing the Grand once, after wagering €7,300,000. A 50/50 chance takes 69,314,718 spins, or about 380 years at that pace.
For comparison, the odds of winning the EuroMillions jackpot (5 numbers out of 50 plus 2 Lucky Stars out of 12) are 1 in 139,838,160. A €1 spin on our model game is only 1.4 times more likely to trigger the Grand than a single line is to win that jackpot.
Does a bigger bet improve your odds?
On most randomly triggered jackpots, the probability is proportional to your stake. At €0.20 a spin, your odds are five times lower than at €1: a 50/50 shot at the Grand would take about 1,899 years at 500 spins a day. On the other hand, the share of your bet that feeds the pool is the same percentage, so a smaller stake does not mean “paying for nothing”: you simply buy less of the jackpot.
- Max-bet-only games. Some games, mostly older ones, only make the top prize available at maximum bet or at a qualifying stake. Playing below it means feeding a pool you cannot win. The rule is in the game’s information screen.
- Must-drop jackpots. The closer the pool gets to its cap or deadline, the more likely it is to drop on the next spin. But it will drop for one of the players online, not necessarily you: your share depends on your stake compared with everyone else’s.
- With an active bonus. The maximum bet allowed under a bonus (often a few euros per spin) also caps your odds on these games, when they are not excluded altogether. See our article on hidden casino bonus rules.
At what size does a jackpot become “profitable”?
A jackpot game’s RTP is not fixed: it depends on the size of the pool when you play. The bigger the Grand, the more each spin returns on average. Here is our model’s theoretical RTP by the displayed Grand amount (other tiers at their average):
| Grand amount | Versus its average | Theoretical RTP | Chance of hitting it in 10,000 spins |
|---|---|---|---|
| €500,000 | 0.5× | 95.5% | 0.01% |
| €1,000,000 | 1× | 96% | 0.01% |
| €2,000,000 | 2× | 97% | 0.01% |
| €3,000,000 | 3× | 98% | 0.01% |
| €5,000,000 | 5× | 100% | 0.01% |
| €8,000,000 | 8× | 103% | 0.01% |
The 100% mark is only reached at €5,000,000, 5 times the Grand’s average. Even beyond that, the right-hand column does not move: over 10,000 spins you have a 0.01% chance of hitting it. An RTP above 100% only “materialises” over hundreds of millions of spins; at the scale of one player, sessions still lose in the vast majority of cases.
The calculation still has one practical use: if you are going to play a jackpot game anyway, you are better off doing it when the pool is high than right after a win, when it has just reset to its seed.
What you really pay: the base game RTP
Since you will almost certainly never hit the Grand, the slice of RTP set aside for it is, for you, a cost. The RTP you actually experience looks more like the game without its rare tiers:
| What is counted | RTP | Average loss over 1,000 spins at €1 | Cost of €3,000 wagering |
|---|---|---|---|
| Regular slot, no jackpot | 96% | €40 | €120 |
| Model game, jackpots included | 96% | €40 | €120 |
| Model game without the Grand | 95% | €50 | €150 |
| Model game without the Grand or Major | 94.5% | €55 | €165 |
On paper, our model game costs the same as a regular 96% slot. In practice, for a player who will hit neither the Grand nor the Major (a 16.7% chance of hitting the Major in a year of daily play), a 1,000-spin session costs €55 on average instead of €40. On a real game with a lower total RTP, such as Mega Moolah at around 88%, the gap is wider still.
That is also why jackpot games are a poor choice for clearing a bonus: many casinos exclude them from wagering, and where they count, the base game drains your balance faster. To compare RTPs, see our RTP guide and how to check a slot’s RTP; the bonus calculator works out the wagering on any offer. A jackpot also makes a game more volatile: our article on slot volatility explains how many bets to budget for.
What if you win? Withdrawal limits
A big win cannot always be cashed out in one go. Casinos set daily, weekly or monthly withdrawal limits, and some pay very large wins in instalments. Some exempt progressive jackpots from these limits, but none of the reviews below says so: check the jackpot clause in the terms and conditions. Here is how long it would take to withdraw €100,000 within the limits listed in our reviews:
| Casino | Withdrawal limits | To withdraw €100,000 |
|---|---|---|
| HunnyPlay | No limit stated | In one go |
| Golden Mina | €50,000/month | 31 days |
| WelleBet | €2,000/dayBy bank card; higher by e-wallet, crypto and for VIPs | 50 days |
| BetNinja | €5,000/day · €16,000/week · €50,000/month | 52 days |
| RealSpin | €5,000/week | 134 days |
| Lussurio | €500 per withdrawal · €1,000/day · €5,000/week · €20,000/month | 146 days |
| Cosmobet | €7,500/week · €15,000/month | 188 days |
| Velobet | €7,500/week · €15,000/month | 188 days |
| Golden Lion | €2,000/week | 344 days |
| Party Spinz | €5,000/month | 571 days |
Method: maximum allowed withdrawal every day, 7-day weeks and 30-day months counted from the first withdrawal. Casinos that do not publish their limits are not listed. “No limit stated” does not guarantee a single payment: the casino may still run extra checks.
Out of 10 casinos, 6 need more than three months to pay out €100,000. So before chasing a jackpot, look at the withdrawal limit as closely as the size of the pool. A big win also triggers full identity checks, sometimes proof of the source of funds: our KYC guide lists the documents asked for, and our high roller bonus article compares limits for €10,000. If a withdrawal is refused or stalls, see what to do about a pending withdrawal.
⚠️ A growing pool is not a reason to keep playing
Live jackpot tickers are designed to make you want “one more go”. A jackpot cannot be chased and never becomes “due”: every spin has exactly the same odds as the last. Treat a jackpot game like a lottery ticket, with an amount set in advance that you are prepared to lose, and use the deposit limits in your casino account. If gambling is becoming hard to control, our responsible gambling page points you to support.
Checklist before playing a progressive jackpot
- Check the game’s information screen for a minimum or maximum bet to qualify for the top prize
- Compare the game’s RTP with a regular slot (around 96%)
- Set a separate “jackpot” budget, as you would for a lottery ticket
- With an active bonus: make sure the game is not excluded from wagering
- Read the withdrawal limit and the jackpot clause in the casino’s terms
Frequently asked questions
How does a progressive jackpot work?
A small slice of every bet, usually a few per cent, goes into a prize pool that keeps growing until someone wins it; it then resets to a seed amount. On a networked jackpot, bets from every casino that offers the game feed the same pool. The winning spin is picked at random by the same random number generator as the rest of the game.
What are the odds of winning a progressive jackpot?
Providers do not publish them. In our model game, where the top prize averages €1,000,000, you need 69,314,718 spins at €1 for a 50/50 chance of landing it: about 380 years at 500 spins a day. Over 40 years at that pace, the probability is only 7.04%.
Does betting more improve your jackpot chances?
On most randomly triggered jackpots, the probability is proportional to your stake: at €0.20 a spin your odds are five times lower than at €1, but the share of your bet that feeds the pool is the same. Some games, mostly older ones, only pay the top prize at maximum bet, so read the game rules before you play.
Does a huge jackpot make a game worth playing?
In theory, above a certain size the RTP goes past 100%: in our model, the top prize has to reach €5,000,000, 5 times its average. In practice, even then you lose in almost every session, because the chance of hitting the top prize is still tiny.
Do progressive jackpot slots count towards bonus wagering?
Often not: many bonus terms exclude jackpot games or count them at a lower rate. Even when they count, their base game returns less than a regular slot, which makes wagering more expensive. Check the excluded games list in the bonus terms before you play.
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9 years of experience in the iGaming industry. Former analyst for two European operators, Thomas tests every casino with a real account and real wagers before any publication.
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