Part III: Business & Regulation · Gambling Mathematics & Probability

57. Coin-In / Coin-Out

Slot Math

Coin-in refers to the total amount wagered on a slot machine during a period, while coin-out refers to the total amount paid out to players as winnings. Coin-in is also called “handle” or “turnover.” The difference between coin-in and coin-out is the machine’s win (or “hold”). Modern slot machines track these values through electronic meters, and they form the basis of all slot performance analytics. Coin-in is NOT the same as drop — drop measures the amount of cash or tickets inserted into the machine, while coin-in measures the total amount wagered including recycled winnings. A single $20 bill can generate hundreds of dollars in coin-in through repeated play. Surveillance and audit teams reconcile coin-in/coin-out meters against cash collections to ensure game integrity.

In practice

Coin-in = total credits wagered. Coin-out = total credits won. Net win = coin-in - coin-out. Average daily coin-in per machine is a key metric for slot floor optimization. The ratio of coin-in to drop is called the “churn factor” or “turnover ratio,” typically 3-7x in slot operations.

One entry from the Casino Industry Glossary — 1,157 terms written for surveillance, compliance and operations professionals rather than for players. Definitions describe industry usage; where a term carries a regulatory meaning, verify against the instrument that governs your jurisdiction.