2026 Property Tax Due Dates
September 14
Summer taxes
February 14
Winter taxes
Payment Methods
Online, Mail, In-Person
St. Clair County Treasurer
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to St. Clair County Treasurer
In Person
Visit the Treasurer's office
About Property Taxes in Michigan
Michigan has one of the most distinctive property tax structures in the country — most homeowners receive two separate tax bills each year: a summer bill and a winter bill. The summer bill (covering school operating taxes and some local taxes) is issued July 1; the winter bill (covering county, township, and remaining local taxes) is issued December 1. Michigan property assessments are governed by Proposal A (1994), which caps the annual increase in "taxable value" at 5% or the rate of inflation (CPI), whichever is lower. This means long-term homeowners are often taxed on a value well below current market value. However, when a property sells, the taxable value "uncaps" and resets to 50% of the new market value — sometimes causing a significant tax increase for new buyers.
Payment & Assessment
Michigan property tax bills follow a split schedule: Summer tax bill: Issued July 1, due by September 14 without penalty. After September 14, a 1% monthly penalty applies for the first two months, then 1/2% per month thereafter. Unpaid summer taxes are turned over to the county treasurer on March 1. Winter tax bill: Issued December 1, due by February 14 without penalty. After February 14, similar penalties apply. Unpaid winter taxes are also turned over to the county treasurer. Some townships and cities collect only summer or only winter taxes — check with your local treasurer for your specific billing schedule. After taxes are turned over to the county treasurer (March 1 for prior-year summer taxes), additional fees apply and the county begins the forfeiture and foreclosure process if taxes remain unpaid for three years. Most counties and municipalities offer online payment. Contact your local township or city treasurer for payment options.
Statewide framework for Michigan. Your county's specific rates and deadlines are shown above.
Other Counties in Michigan
About St. Clair County
St. Clair County is a county located in the U.S. state of Michigan and bordering the west bank of the St. Clair River. As of the 2020 census, the population was 160,383. It is the 13th-most populous county in the state. The county seat is Port Huron, located at the north end of the St. Clair River at Lake Huron. The county was created September 10, 1820, and its government was organized in 1821. It is located northeast of Detroit. It is considered by the State of Michigan to be a part of The Thumb, a peninsula that is surrounded by Lake Huron in the east-central area of the state. This area is sometimes dubbed the Blue Water Area.
Source: Wikipedia — content available under CC BY-SA 4.0
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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.