The Equal Pay Act of 1963 (EPA) prohibits sex-based discrimination in pay and benefits. Employers shouldn’t pay different wages to employees of the opposite sex for substantially equal work. “Substantially equal” work doesn’t mean identical work. It means substantially equal in terms of required skills, effort, and responsibilities.
An employer can defeat an EPA claim of discriminatory compensation if it shows the difference in wages was on account of seniority, merit, quantity or quality of work, or any factor other than sex. Such was the case for FNGP, an auto parts manufacturer.