Where the meter money comes from
The contribution rate is the percentage of each qualifying stake that is set aside for the jackpot rather than returned through the game. It is the engine of a progressive. Work through one stake and one pool and the whole mechanism becomes arithmetic: a second cut, taken on top of the house margin, every time a qualifying stake is played.
Meter 01One stake, three destinations
When you play a progressive game, a single stake is divided. One part is returned to players through the ordinary outcomes of the game, following the game odds. One part is the operator margin, the house edge. And one part — the contribution — is set aside for the pool. The contribution is the extra slice, the one that would not exist in a non-progressive version of the same game.
Because the contribution is diverted before the game resolves, it is not available to be returned as ordinary winnings. That is the precise sense in which a progressive game is worth less per stake than its non-progressive twin: same odds, same outcomes, one additional slice removed and held for a prize almost nobody will receive.
Meter 02A worked example
Suppose a game returns 96% of stakes through its ordinary outcomes, keeps 4% as margin, and adds a contribution rate of 1% of each qualifying stake on top. Stated plainly: for every 100 units staked, about 96 come back through play, 4 is the margin, and 1 is set aside for the meter.1 The ordinary return has fallen from 96% to 95% because the contribution is taken from the same stake before the game is played.
Now watch the pool build. At the same contribution rate, a player staking 100 units contributes roughly 1 unit to the meter, regardless of whether anything is won. Ten thousand staking units put about 100 into a pool that one eventual winner will receive. The meter is simply the accumulated total of those slices, plus whatever seed the operator started with. Nothing about the size of the pool changes the odds of the ordinary game.
| Design | Ordinary return | Contribution | What the player buys with the shortfall |
|---|---|---|---|
| Non-progressive | About 96 units per 100 | None | Nothing extra. |
| Progressive | About 95 units per 100 | About 1 unit per 100 | A very small chance at the whole meter. |
Meter 03Why the size of a pool tells you about traffic, not value
Because the pool is the accumulated contribution, its size is a function of how much has been staked on that game since the last win. A pool of millions is the residue of hundreds of millions staked, which means the size of a meter is closer to a headcount than to a gift. This is also why networked pools reach larger figures than local ones: the same contribution rate applied to far more stakes.
The size of the meter does shift the arithmetic of the draw a little — the same slice of stake is buying a share of a larger prize — but that effect is small next to the permanent cost of the contribution, and it changes nothing about the game underneath. A larger meter is a larger redistribution of stakes that have already been collected; it is not new money entering the system. See networked pools and false beliefs.
The contribution in one sentence
The contribution rate is an extra cut taken from each qualifying stake and held for a prize. It lowers the return of the ordinary game, it funds a pool that rewards a rare draw, and it is paid by every player whether or not the prize ever lands.
Meter 04Reading a contribution rate against the prize
The honest comparison is not this jackpot versus that jackpot but this stake in the progressive versus the same stake in the ordinary game. The difference is the contribution, and what it buys is a lottery ticket attached to a game you were already playing. Whether that trade appeals is a personal judgement; what is not a judgement is the direction of the trade on expected return, which is negative and permanent.
The meter reflects money actually staked and set aside. It is a real figure with a real funding history.
The contribution is taken from your stake every time, and it is not returned through the ordinary game.
The trigger is rare by design, and usually available only at the qualifying (often maximum) stake.
For how the contribution compares with a game's ordinary edge, see the pool; for how the drop rule bounds it, see must-drop.
What stops the pool climbing forever
A progressive is usually bounded by a must-drop level. Read what that rule guarantees — and what it conspicuously does not.
Affiliate disclosure and risk warning
Every affiliate link on this page and in the header is a sponsored link to a partner operator, and we may be paid if you open an account through it, at no extra cost to you. That link pays us; it does not make a jackpot more likely to land, it does not improve any decision, and it is never a recommendation to play. Nothing on this page is legal, financial or betting advice. 18+ only. Gambling is a real risk of real loss. A progressive jackpot is the clearest case there is of a prize that feels like a windfall and is in fact a funding mechanism: the meter is other players' money, collected a fraction of a stake at a time; the road that leads to it is the game itself, whose house edge is applied to every stake whether or not the meter ever climbs; and the event that pays it is rare, deliberately weighted, and usually open only to the maximum stake. The average player is behind before a single spin, and a larger prospective prize does not change the arithmetic of the game that funds it. Whether these products may be offered where you are, who may play, whether the operator is licensed, what is owed on winnings and whether any form is lawful all differ between countries, states and provinces, and they change; a general explanation of how a meter is built is not advice on your own position or your own eligibility. Never stake money you cannot afford to lose, never borrow to play, and never chase losses with a larger stake. Chasing a growing meter with bigger stakes is the single most expensive habit this subject invites. Gambling can cause serious financial harm, including debt and damage to relationships and mental health. Free and confidential support is available in most countries through national gambling-harm helplines, for players and for the people around them.
- 1Figures are illustrative roundings chosen to make the split visible. The actual contribution rate, ordinary return and margin of any game are set by its own rules and are published by the operator, not by this site.