Tax Payments Due January 31, 2026: First installment or full property tax payments due January 31, 2026. Tax payments must be postmarked or paid online by January 31, 2026 to be considered a timely payment. If you plan to pay your property taxes by mail, consider using a certified or guranteed delivery date service. Make a payment in-person during the hours of M-Th 9am-3pm, and Fridays 11am-2pm through January 30th, except for holidays. Online payment can be made here: https://townofmerrimac.net/taxes-property-info/