How slot payback works

Payback (RTP) and house edge

Payback, or return‑to‑player (RTP), is the share of all money wagered that a machine returns over the long run. The casino keeps the rest — the house edge (also called hold or win %): house edge = 100% − payback. A 92% machine pays back $92 of every $100 cycled through it on average and keeps $8. There is no playing strategy that changes a slot's payback; every spin is an independent, random draw from the machine's fixed math.

Payback ≠ your odds of winning

Three different things get confused. Payback is the long‑run average return. Hit frequency is how often any prize lands (often 25–45% of spins, but many "wins" return less than you bet). Volatility is how swingy the game is — high‑volatility slots pay rarely but bigger. Two machines can have identical 92% payback and feel completely different. Higher payback doesn't mean you'll win; it means you lose more slowly on average.

Why higher denominations pay back more

Operators set tighter holds on low‑denomination machines (penny, nickel) and looser holds on high‑limit ones. So penny slots — the most popular on the floor — pay back the least (~88%), while $5+ machines run ~94–95%. But you bet far more per spin on a high‑limit machine, so the dollars lost per hour are usually higher even though the percentage edge is lower. The "cost to play" calculator shows that trade‑off.

What an hour costs

Expected loss is simply the edge applied to everything you wager: loss = bet per spin × spins per hour × (1 − payback). At ~600 spins/hour, a $1.25 penny‑slot bet cycles $750/hour; at ~12% edge that's about $90/hour in expected loss. This is the long‑run average — any single session swings far more in both directions.

Where the numbers come from

Land‑based payback is published by state gaming regulators — the Nevada Gaming Control Board reports hold % by area and denomination; New Jersey, Pennsylvania, Mississippi, Missouri and others publish state/market figures. We use the most recent available year (compiled via sources like the American Casino Guide). Regulators report by area and denomination, not per machine or game title, so these are real market averages — not a guarantee for any one machine — and they shift year to year.

Frequently asked questions