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 Prowers County Assessor.
Effective rate
Colorado property tax is based on local mill levies and statutory assessment rates that vary by tax area; no single current effective countywide percentage was published in the official county sources reviewed.
Statement mailing
Mid-January 2027; Prowers County's official Treasurer calendar states tax bills are mailed in mid-January.
Payment deadline
For 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
May 1 through June 8, 2026 under Colorado's current standard real-property protest period; a separate Prowers-specific 2026 cutoff was not published in the official source reviewed.
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.