Denver County, Colorado property-tax rates and 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 Denver County Assessor.
Rate context
Published7.9602% combined general mill levy for 2025 (79.602 mills; actual parcel tax rates vary by taxing district); a 2026 countywide effective average was not published.
Statement mailing
PublishedJanuary 2027; Denver states property-tax bills are mailed in January; the exact 2027 date was not published.
Payment deadline
PublishedFor 2026 property taxes payable in 2027: taxes are due January 1, 2027; amounts over $25 may be paid in two equal installments, with the first half due by February 28, 2027 and the second half by June 15, 2027, or paid in full by April 30, 2027. Colorado county treasurers apply delinquent interest after the applicable deadline; a statutory weekend/holiday adjustment may apply.
Valuation protest
PublishedMay 1 through June 8, 2026 for real-property valuation protests; the next business day applies when the statutory deadline falls on a weekend or holiday.
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.