Washtenaw County, Michigan property-tax payment and appeal deadlines
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The reviewed record below separates published figures from items that still require confirmation with Washtenaw County Equalization and Property Description Department and County Treasurer.
Rate context
ConfirmMichigan property taxes are levied by individual cities, townships, and villages; no single countywide effective property-tax rate is published.
Statement mailing
Confirmofficial county sources reviewed do not publish a single 2026 countywide mailing date; local collecting units issue summer and winter bills.
Payment deadline
Published2026 Michigan property-tax schedule: summer taxes are generally issued July 1 and due September 14, 2026; winter taxes are generally issued December 1, 2026 and due February 14, 2027; local city, township, and village schedules may vary. Unpaid 2026 taxes are generally returned to county treasurers March 1, 2027, with the statutory county administration fee and interest.
Valuation protest
Published2026 assessment appeals must first be filed with the local city, township, or village Board of Review. Michigan's State Tax Commission 2026 calendar sets the organizational meeting for March 3, appeal meetings beginning March 9 (with March 10 or 11 permitted locally), and completion by April 6, 2026; local meeting dates and notices control. Further Michigan Tax Tribunal deadlines depend on the claim.
Do not assume a grace period.
The reviewed record identifies the payment timing above but does not establish a universal penalty schedule for this page. Late charges, interest, collection costs, tax-sale procedures, and lien or foreclosure timelines can depend on state law and the local collector’s process. If the deadline is close or a balance is delinquent, contact the tax collector directly and request the current payoff amount in writing.
Treat a published payment deadline as a hard operational date and retain your receipt or confirmation number.
From assessment to collection
01Valuation and notice
Review the assessment notice as soon as it arrives. The protest window may run from the notice date rather than from the payment due date.
02Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
03Payment confirmation
Use the official collector channel, then save the receipt, transaction reference, and date posted. A bank submission is not always the same as a county posting date.