Some Boulder County services returned in-person on a limited basis beginning June 1. Most services are still being offered virtually.

Resources are available for those impacted by COVID-19. For help, submit questions or call 720-776-0822 weekdays (9 a.m.-5 p.m.).

Fire Restrictions were updated on June 2 and remain in effect for western Boulder County. View the flyer and map for more details.

Courthouse art deco relief showing miner and farmer


Due to COVID-19, our offices in Longmont and Lafayette are closed until further notice. Our main office in Boulder is closed to the general public, with appointments available for services that require in-person exchanges. To set-up an appointment, contact us at (303) 441-3520.
Our policy on tax payments during the state of emergency for COVID-19
There are resources available to you during this time. Please check out the County’s list of resources for people affected to find out more.


The Treasurer’s Office collects taxes for real property, mobile homes, and business personal property (business equipment).

On July 1, 2020, the Treasurer will become the Public Trustee

Information about the transition, later this year, of the Boulder County Public Trustee’s office is available.

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 choose to mail us a payment, do not include cash. Checks should be made payable to “Boulder County Treasurer.”

To pay taxes by phone, call 1-800-272-9829 and use jurisdiction code: 1601

It’s easy to pay online. Just click the button below!

Do not use our online system to make a late first half payment. The interest charged will be more than you must pay. Call our office for payment options.

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

Contact Us

Treasurer's Office

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

Email Us

Mailing Address

PO Box 471
Boulder, CO 80306

Connect With Us


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


515 Coffman St.
Suite 113
Map & Directions

Office closed


1376 Miners Dr.
Unit 105
Map & Directions

Office closed