2026 fiscal calendar
Know the tax date before it becomes a penalty date.
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The verified record below separates published figures from dates that require confirmation with Douglas County Assessor Alicia Degase and Collector Laura Stillings.
Effective rate
no single countywide effective average published; Missouri property-tax rates are set by the county, cities, schools, and other local taxing districts.
Statement mailing
no specific 2026 Douglas County tax-bill mailing date was published by the official sources reviewed.
Payment deadline
2026 real-estate and personal-property taxes are due December 31, 2026; payment must be received or postmarked by December 31 to avoid statutory penalty and interest.
Valuation protest
July 13, 2026 (the second Monday in July), the statutory County Board of Equalization valuation-appeal filing deadline; a Missouri State Tax Commission appeal is generally due September 30, 2026, or within 30 days after the BOE decision, whichever is later.
Critical payment warning
Do not assume a grace period.
The verified county 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 the published payment deadline as a hard operational date and retain your receipt or confirmation number.
Read the calendar in order
From assessment to collection
1. Valuation 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.
2. Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
3. Payment 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.