Comparison

Progressive Jackpot vs Fixed Max Win

Progressive jackpots (Mega Moolah, Hall of Gods) can pay life-changing sums but drain base-game RTP. Fixed max-win slots cap the ceiling but keep more of your stake in play-time.

Reviewed by the Slots Irish Editorial Team · Last updated 21 April 2026

How progressive jackpots work

A portion of every bet across all licensed casinos feeds a shared pool. Mega Moolah has paid out €10M+ multiple times. The catch: the jackpot contribution is taken FROM the base RTP, so Mega Moolah's effective RTP is closer to 88% if you never hit the jackpot.

How fixed max-win slots work

The prize ceiling is capped at a multiplier of your stake — typically 2,000x to 100,000x. Nolimit City's Mental caps at 66,666x, Relax Gaming's Money Train 4 at 150,000x. Base RTP stays at the full 96%+ because nothing is siphoned off for a jackpot pool.

Expected outcomes

On progressive slots, 99.9% of sessions are net-negative and a handful deliver the whole population's wins. On fixed max-win slots, the variance is still high but more evenly distributed — you'll see more medium wins and fewer "nothing for 200 spins then €5M" outcomes.

Which is better for Irish players

Lottery-style entertainment on a small stake: progressive. Realistic bonus-chasing sessions: fixed max-win. Our Best Irish Casinos filter surfaces both categories separately.

How this comparison was produced

Every stat in the table above is pulled directly from our independent slot and casino reviews on Slots Irish. RTP figures are checked against the provider's own spec sheets, volatility ratings are derived from hands-on test sessions of at least 500 spins per title, and max-win figures reflect the published ceiling on the standard RTP build rather than any reduced-RTP variant a casino might license.

For the full methodology used to evaluate a slot or an operator, read our review methodology page. Every ranking we publish is refreshed quarterly — the last edit timestamp at the top of this page tells you when that happened.

What's not in the comparison

A single head-to-head comparison can't capture every nuance. Specifically:

Session volatility — the raw volatility rating tells you the shape of the distribution, not what it feels like over 200 spins. Test both titles in our free demo to calibrate expectations.
Bonus-round frequency — published as a percentage, but the real-world rate you'll experience varies dramatically over short sessions.
Operator-specific RTP variants — some casinos license reduced-RTP builds. Always check the in-game info panel before real-money play.
Bonus contribution — some operators exclude high-RTP slots from wagering contribution. See our wagering calculator to model this.