The Treasurer’s Office collects taxes for real property, mobile homes, and business personal property (business equipment). The Treasurer is also the Public Trustee– handling the release of deeds of trust and managing foreclosures.
2024 Taxes Payable in 2025
Tax notices are mailed out in late January each year.
If you prepaid your property taxes, we have answers to some frequently asked questions.
Paying Taxes
Property taxes may be paid in full, or in two half payments, by the due dates. You can pay these taxes in our office, by mail, online, or over the phone. Instructions for each of these payment methods can be found on the back of your property tax notice.
If you pay online with an e-check, there is no charge to you for the service. Our processor charges a fee for card payments.
If you choose to mail us a payment, do not include cash. Checks and money orders should be made payable to “Boulder County Treasurer.”
It’s easy to pay online. Just click the button below!
Electronic Property Tax Notices
We now offer the option to receive tax notices by email. Please read the instructions, then click the button below to get started!
Seniors, Veterans, and Active-Duty Military
Tax Deferral for Seniors and Active-Duty Military
For taxes payable in or after 2026, the application process for tax deferrals is returning to the county Treasurer’s Office. SB25-261, passed in 2025, brought the administration of the application portion of the deferral program back to county treasurers, leaving the management of the deferral loans with the Colorado State Treasurer’s Office.
We have more information on the qualifications for seniors and active-duty military personnel entitled to defer. To submit an application, please contact our office by phone at 303-441-3520 or via email at treasurer@bouldercounty.gov. We accept applications from January through mid-March for taxes payable that year.
The interest rate on deferral loans is “equivalent to the rate per annum on the most recently issued ten-year United States treasury note, rounded to the nearest one-tenth of one percent, as reported by the ‘Wall Street Journal’, as of February 1” (C.R.S. 39-3.5-105(5)).
