Saturday hours are by appointment only. Please call (989) 386-7313 to schedule an appointment! Live ATM Banker Hours: M-F 8:00 - 6:00, Sat 9:00 - 1:00 Mercantile Bank provides financial products and services in a professional and personalized manner. Our commitment to innovation makes banking easier for businesses and consumers. We provide a high level of service, a knowledgeable staff, and are committed to strengthening the diverse communities we serve.