In Wisconsin, the employment relationship is at-will. The employer and employee determine the terms and conditions of employment and, absent a promise of employment for a certain period of time, the relationship and its terms can end or change at anytime. Because of the at-will relationship, an employer may take a raise back without violating the law. What it may not do is to take pay back for work already performed at the rate under the pay raise. It’s a matter of expectations. Where an employee works for an agreed upon wage, even if it was the result of an unexpected pay raise, the employee is entitled to get paid at that rate. Once the work is performed, the employer may not modify the rate of pay for that work already performed. Taking pay back or failing to pay the wage at the rate agreed upon when the work was performed will violate the employee’s contractual rights and state wage laws. Deducting future paychecks for any such retroactive reduction in the wage rate also violates Wisconsin law.