Courthouse art deco relief showing miner and farmer

We have discontinued online payment for the year and now require payment in certified funds. Payment can be made by mail or in our office with cash (office only), cashier’s check, or money order.

Our Lafayette office is now closed for the year. It will open again in late January, after tax notices have been mailed out. Please contact our office at 303-441-3520 with any questions.


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.

2021 Taxes Payable in 2022

Tax notices are mailed near the end of January, to the owner of the property. .

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.

Please note, our processor has increased the fees for making card payments from the amounts listed on the tax notice sent this year.

If you pay with an e-check, there is no charge to you for the service.
Our processor charges the following fees for card payments:

  • debit cards: 1.15% (minimum $1.15)
  • credit cards: 2.85% (minimum $4.50).

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!

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

In the past, the Treasurer’s Office processed applications for the Senior Property Tax Deferral and Active Military Property Tax Deferral programs. Beginning in 2023, the State Treasurer will run all aspects of the program, including the deferral application process.

We do not yet have contact information for the State Treasurer’s program, but we will provide it here as soon as we do.

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

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

Office closed until next January