The payout for a corner bet in roulette, where a player wagers on four numbers that form a square on the betting layout, is 8 to 1. If the ball lands on any of the four chosen numbers, the player receives eight times their original bet in winnings, plus the return of their initial wager. This payout reflects a moderate level of risk, as the corner bet covers more numbers than single or split bets but fewer than outside bets.