I implement a large-scale field experiment in the US auto repair industry to study the existence and structure of gender-based price discrimination in service markets. Women receive price quotes that are 1.9 percent (9 dollars) higher than men. These differences disappear once women signal low search costs, suggesting statistical rather than taste-based discrimination. Price requests that appear to come from high-income households raise price quotes for men but not women, eliminating the gender gap. The price gap between genders falls with the number of nearby repair shops, suggesting that market competition alleviates discrimination.