Employees complain about being underpaid the minute they are underpaid in any pay period. That same urgency is rarely exhibited when they are overpaid. Months and even years can pass before these errors are identified. The costs of overpayment are staggering and often very hard to recoup. The web of complexity surrounding payroll rules combined with the constant movement of employees inside an organization means inaccuracies will exist. Whether you are overpaying employees (most likely) or underpaying, it is better to find out where the problems exist as soon as possible. When underpaying employees, state and federal fines can cost millions of dollars when combined with back pay and damages. Historical overpayments can be traumatic events for employees who may not be able to immediately return the money. A fast audit can identify the errors, train the payroll team, and stop future violations from occurring.