A slot machine that pays a wage. It is real, it is about $82 an hour, and it is a job.
A must-hit-by jackpot is forced to pay before its printed ceiling. Sit close enough to that ceiling and the machine owes you money — at a rate you can put a floor under without knowing anything about the cabinet.
The short version
Worked on a real machine throughout: a Buffalo Link whose Grand reads MUST HIT BY $1,800, sat down at $1,730. Phoenix Link, Dragon Link and the rest of the family work identically — only the printed number changes.
- $82 an hour
- is the least that seat can pay, at a dollar a spin. Not an average — a floor. Every faster hit pays better, so nothing the machine does internally can push it lower.
- $411 an hour
- is the same floor at five dollars a spin. The money needed to walk the meter up is fixed, so betting bigger buys the same jackpot in fewer hours. This is why the people who work these play them high.
- $960
- is the expected profit on the position, worst case, for $7,000 of coin-in. A must-hit-by is forced to pay, so if you are alone on the machine and stay, this is close to certain rather than a lottery ticket.
- 12 hours
- is what that costs you in the chair, worst case, at a dollar a spin. Step away and the next player inherits everything you paid to build — which is the real risk here, and it is not a statistical one.
Words we could not avoid
- the ceiling
- The number printed after the words MUST HIT BY on the machine — $1,800 on the Buffalo Link that prompted this page. You do not calculate it or look it up; it is on the glass, and it is the only figure the manufacturer commits to.
- the meter
- The running jackpot total displayed beside the ceiling. It climbs as people play and drops back to a seed value when it pays. Meter divided by ceiling is the entire calculation on this page.
- must-hit-by
- A progressive that is forced to pay before its meter passes the printed ceiling. Buffalo Link, Phoenix Link and Dragon Link all work this way, usually with several tiers, each carrying its own ceiling.
- RTP
- Return to player: the share of everything wagered a machine pays back on average, over the very long run. A 90% RTP machine keeps a tenth of what goes through it. Almost never published on the cabinet.
- contribution rate
- The slice of every wager that gets added to the progressive meter rather than paid out normally. Typically one to three percent, and also not published.
- a paytable
- The list of what each combination pays, printed on the machine or reachable from its screen. It tells you the payouts and not the odds of hitting them, which is the difference that matters.
- coin-in
- The total amount wagered, counting every spin. Not what you lose — what passes through the machine, which on a slot is many times larger.
- expected value
- What a bet is worth on average if you could make it thousands of times. Positive expected value means the average outcome is a gain, which on a slot is rare enough to be worth this entire page.
- house edge
- The share of every dollar wagered the machine keeps. On a slot it is one minus the RTP, and it is the largest in the building.
- bankroll
- The money set aside to play with — everything you are prepared to put at risk before you stop, which on this play is the binding constraint.
What this was computed on
The bound below assumes nothing about how the machine chooses its hit point, because nobody publishes it. It uses only what a must-hit-by machine guarantees on the glass: the jackpot cannot pass the ceiling.
What is certain
- Spins are independent draws from an unchanging distribution
- A must-hit-by jackpot cannot pass its printed ceiling
- Moving the meter by a dollar requires a dollar divided by the contribution rate of coin-in
- The base game returns its RTP on everything wagered along the way
The bound
- Worst case for the player is a hit at the very ceiling
- If the play wins even then, it wins under any hit distribution
- Reported alongside the answer when the hit is assumed uniform
- The gap between the two is the value of the missing information
The numbers assumed
- Ceiling of $1,000, a common size
- Base RTP between 85% and 94%
- Contribution rate between 1% and 3%
- A dollar a spin, 600 spins an hour
What is not modelled
- Which specific machines are must-hit-by — sources disagree
- Competition from other players for the same live machine
- Being asked to leave, or simply needing to sleep
- Any claim about a specific manufacturer’s actual RTP or contribution
We did not verify a single machine. No RTP, no contribution rate, no hit distribution, no cabinet. Everything here is a bound derived from a number printed on the glass, and it would take a manufacturer’s par sheet to turn it into an actual answer.
Sources disagree about which machines are must-hit-by at all. One classes Lightning Link and Dragon Link as must-hit-by; another describes their Grand and Major as random, which is the opposite claim about the same cabinet. We could not resolve it and have not tried to.
The uniform-hit figures are an assumption and are labelled as one throughout. Only the guaranteed threshold is distribution-free, and it is the one every conclusion rests on.
Finding one
The seat pays at least $82 an hour, and that is a floor rather than an average.#
- floor, $1 a spin
- $82/hr
- floor, $5 a spin
- $411/hr
- if the hit is uniform
- $231/hr
- assumption required
- none
Take the machine that prompted this page: a Buffalo Link whose Grand reads MUST HIT BY $1,800. Sit down with the meter at $1,730 and play until it pays. The jackpot is forced to arrive before $1,800, so you will get it — the only question is how much you feed in first, and the answer is capped by that printed ceiling.
Worst case it holds out to the very top: $7,000 of coin-in for $960 of expected profit, which at a dollar a spin and 600 spins an hour is 11.7 hours and $82 an hour. Any earlier hit is better on both counts — less fed in, nearly the same won — so the rate can only rise from there.
That monotonicity is what makes the number unusual. It is not an estimate that depends on assuming how the machine picks its moment; it is the least the position can pay under any behaviour at all. Assume the hit falls uniformly and it is $231 an hour instead, but the floor stands without assuming anything.
And it scales with the bet, because the coin-in needed to walk the meter is fixed in money rather than in spins. At five dollars a spin the same $960 arrives in a fifth of the time: $411 an hour. Which is exactly why the people who work these machines play them at high denomination.
Finding two
The two numbers you need are printed above the machine, and there are four of each.#
- the ceiling
- after MUST HIT BY
- the meter
- the running total
- tiers to check
- each separately
- conservative rule
- 95% of the ceiling
There is no step here that involves looking anything up. The display above a Buffalo Link, Phoenix Link or Dragon Link carries a jackpot name, a running meter, and the words MUST HIT BY followed by a number. The number after those words is the ceiling. The running total is the meter. Divide one by the other.
Where the bet turns positive depends on the machine, and the safest line that works on all of them is 95% of the ceiling — $1,710 on that $1,800 Grand. It is deliberately pessimistic, and finding three is about how much it costs you to be that careful.
Each tier is a separate bet with its own ceiling and its own meter. A Grand sitting at 97% of its ceiling says nothing whatever about the Mini beside it, and the tiers do not move together.
Finding three
A generous machine is positive from half its ceiling, and being careful costs you the difference.#
- best machine turns positive at
- 900 of 1,800
- worst machine
- 1,680 of 1,800
- the safe rule says
- 1,710
- inputs published
- none
On that same $1,800 Grand, a machine returning 94% and contributing 3% is already a positive bet at $900 — half the ceiling. One returning 85% and contributing 1% does not turn until $1,680.
So the 95% rule is not free advice. Applied to a generous cabinet it walks you past eight hundred dollars of profitable meter. It is the right rule when you know nothing, and knowing nothing is expensive.
What separates those cases is the base return and the contribution rate, and neither is on the machine, in the paytable, or on the operator’s site. That is the honest limit of this page: the wage is real and computable, and identifying which cabinets pay it is not something a player can do from the outside.
Finding four
Everything else people believe about slots is the meter, misread.#
- chance next spin hits, fresh
- 1 in 50,000
- after 100,000 losers
- 1 in 50,000
- median gap
- 34,657 spins
- droughts past 150,000
- 5% of the time
A slot draws from the same distribution every spin and keeps no record of the last one. Our model answers “what are the odds now, after all those losses” with a function that takes the losing streak as an argument and ignores it, which is the most honest implementation available.
Long gaps are ordinary rather than remarkable. A 1-in-50,000 jackpot has a median gap of 34,657 spins and runs past 150,000 5% of the time.
The reason it belongs on this page is that there IS one thing on a slot that legitimately changes with history, and it is the meter. A machine that just paid has reset to the bottom, which is genuinely the worst moment to sit down — not because it is empty, but because the only quantity that ever makes the seat worth taking has gone back to the start. The folklore is pointing at the right object for the wrong reason.
Where the line sits, machine by plausible machine
On a $1,000 ceiling. The guaranteed column holds under any hit distribution; the uniform column assumes one and is shown only for the size of the difference.
| RTP 94%, contributing 3.0% | $500.00 |
| RTP 92%, contributing 2.0% | $750.00 |
| RTP 90%, contributing 1.5% | $850.00 |
| RTP 88%, contributing 1.0% | $916.67 |
| RTP 85%, contributing 1.0% | $933.33 |
What to do in front of a slot machine
What the position pays, what it asks in return, and the three beliefs it replaces.
research/slots/engine.py · a bound that holds under any hit distribution
Taking the position
Two numbers off the glass, then a decision about your afternoon.
What it replaces
Three beliefs about slots, two wrong and one true.
The floor is $82 an hour at a dollar a spin, $411 at five. Not an average — the rate only improves if the jackpot lands sooner, so no behaviour of the machine can push it below that.
It is a job, not a bet. $7,000 of coin-in and 12 hours in one chair, worst case, and if you leave the machine the next player collects what you paid to build.
Being careful is expensive. The 95% rule is safe on every cabinet, and on a generous one it walks you past eight hundred dollars of profitable meter — because the two numbers that would tell you apart are not published.
This is the only page on this site where the answer is that the house can be beaten and the number is worth having. It is also the only one where the answer is a shift rather than a strategy: $82 an hour is a wage, 12 hours is a working day, and the seat has to be yours the whole time. Whether that is a good job is a different question from whether it is a good bet.