This means the jackpot grows every time someone wagers a bet on the machine.

Here's a brief breakdown of how penny slot games work: most penny slot machines have what's called a progressive jackpot. Dollar slots, on the other hand, require a dollar to play. penny slots, as you might imagine, are played with a penny. What's the Difference Between Penny Slots and Dollar Slots?Īs the names might indicate, the most significant difference between penny and dollar slots is the denomination with which they're played.