Courthouse art deco relief showing miner and farmer


Tax payments have been disabled on our website because it will not allow you to make a late payment without interest, as permitted by our current Tax Payment Policy. You can still pay by mail or in our offices. Please contact us if you have questions.
Our offices in Longmont and Lafayette are now open. The Longmont office is open Mondays and Lafayette is open Tuesdays.
Please see our list of resources for people and businesses affected by COVID-19 to find out more about resources available to you during this time.


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.

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 (please note COVID-19 restrictions at the top of this page), 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 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! Although online payments are no longer being accepted, you can still lookup your taxes and view receipts online.

Look up / pay property taxes

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!

Sign up for electronic tax notices

Seniors, Veterans, and Active-Duty Military

The Treasurer’s Office processes applications for:

Senior Property Tax Deferral
Active Military Property Tax Deferral

Tax exemption program applications are processed by the Assessor:

Senior Tax Exemption
Disabled Veterans Tax Exemption

Tax Liens

Once a year, real properties with unpaid taxes are subject to having a tax lien placed on the property.

Tax Lien Sale Information

On July 1, 2020, the Treasurer became the Public Trustee

The Treasurer is now the Public Trustee. When a real estate loan is paid, the Public Trustee releases the deed of trust, conveying ownership of the property to borrower. The Public Trustee also manages foreclosures ensuring the rights of borrowers and lenders are protected.

If you have any questions, you can contact our office at 303-441-3520, or by email at (foreclosure-related questions) or (general questions).

Contact Us

Treasurer's Office

Phone: 303-441-3520
Fax: 303-441-3598

Treasurer Email


Mailing Address

PO Box 471
Boulder, CO 80306


1325 Pearl St.
1st Floor
Map & Directions
Hours: 8 a.m. - 4:30 p.m.
Monday - Friday

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515 Coffman St.
Suite 113
Map & Directions
Hours: 8 a.m. - 4:30 p.m.
Mondays Only


1376 Miners Dr.
Unit 105
Map & Directions
Hours: 8 a.m. - 4:30 p.m.
Tuesdays Only