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Definition
The direct answer: “must-hit-by” means a progressive jackpot is guaranteed to be awarded before its counter climbs past a posted ceiling. The machine shows the live counter and, usually in smaller print, the ceiling it must hit by. When the counter reaches that ceiling, the jackpot is forced to pay. Some manufacturers call it “must award by” — same idea.
A must-hit-by progressive is a jackpot with a hard upper limit — it cannot keep growing forever, and it will be paid out at or before that limit.
That single guarantee is what makes must-hit-by different from a normal progressive. A standard progressive can climb to any value and hit at a random, undisclosed point. A must-hit-by is capped, so you always know the furthest it can possibly run before it must pay.
The figures below are an illustrative example, not a real machine — made up purely to show how the two numbers relate.
Imagine a tier that resets to $50 and shows “must hit by $75.” Right now the counter reads $71. That means the jackpot is guaranteed to be awarded before the counter passes $75 — so at most a few more dollars of coin-in remain before it is forced to pay. It could still hit at $71.20 or $74.90; the only promise is that it will not cross $75 unpaid.
That is the entire concept. Everything an advantage player does with must-hit-by builds on this one idea of a counter approaching a fixed ceiling.
The definition is the easy part. The valuable part is learning to read the display, calculate whether a counter is player-favorable, and find these machines on the floor. Those live in our deeper guides:
The 204+ Run the Slots guides turn “I know what must-hit-by means” into “I know exactly when this machine is a play” — with the ceilings and counter targets for each game.
View PricingMust-hit-by means a progressive jackpot is guaranteed to be awarded before its counter climbs past a posted ceiling value. The machine displays the current, rising counter and, usually in smaller text, the ceiling it must hit by. Once the counter reaches that ceiling, the jackpot is forced to pay. It is sometimes labeled 'must award by' by certain manufacturers, but the idea is the same: a hard upper bound the progressive cannot exceed.
No. The ceiling is the latest possible point it can pay, not the exact point. The jackpot fires at a random value at or below the ceiling, so it often hits before reaching the top of its range. The guarantee is only that it will not pass the ceiling without being awarded. That is why a counter sitting close to its ceiling has little room left to run, which is the situation advantage players look for.
The counter is the live, climbing value you see growing as people play; it resets to a floor after the jackpot hits. The ceiling is the fixed maximum the counter cannot exceed before paying. Reading a must-hit-by machine means looking at both numbers and judging the gap between them — the smaller the gap, the less play remains before the jackpot is forced.
Because the ceiling puts a hard bound on how far the counter can travel, which lets you estimate the maximum cost to reach a guaranteed payout. When the counter sits near its ceiling, the remaining expected cost is small relative to the jackpot, and the play can become player-favorable. Standard progressives with no ceiling do not offer this, which is what separates must-hit-by from an ordinary progressive.
No. A mystery (or 'mystery progressive') jackpot triggers at a random, undisclosed value with no posted ceiling you can read, so you cannot bound it. Must-hit-by publishes the ceiling, which is exactly what makes it readable and, at the right counter, beatable. We compare the two directly on our must-hit-by vs mystery progressive page.
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