Yes, as long as you are given prior notice of the change the payday before the time the change takes effect. For example, if your normal payday (the day you are paid your wages) is on the 15th of the month, your employer could give you written notice of a change in your rate of pay any day before the 15th. All work done by you for this employer after the 15th would then be at the new rate.
Get Help from an Experienced Employment Law Attorney
Have you been discriminated against by a potential or current employer -- as a job applicant or current employee? To best protect your legal rights you should discuss your situation with an employment lawyer. Meet with a local employment for employees attorney sooner rather than later to protect your rights.