The highest-paying bet in online roulette is the Straight Up bet, where you place your chips on a single number. This bet pays out 35 to 1, meaning if you win, you receive 35 times your bet plus your original stake. However, the odds of winning a Straight Up bet are low, with a probability of about 2.70% in European Roulette and 2.63% in American Roulette. Despite the high risk, this bet is favored by those seeking the largest possible payout from a single spin​.