Treasurer
Courthouse art deco relief showing miner and farmer

Treasurer

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!

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

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)).

Homestead Exemption for Seniors, Veterans with a Disability, and Gold Star Spouses

Tax exemption program applications are processed by the Assessor:

Senior Tax Exemption
Tax Exemption for Veterans with a Disability and Gold Star Spouses

Tax Liens

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

If a tax lien is outstanding for more than three years, a lienholder can apply for the Treasurer to hold an auction of the property to satisfy the lien.

NOTICE TO A PROPERTY OWNER OF A PROPERTY FOR WHICH THE OPTION FOR TREASURER'S DEED HAS BEEN SOLD AT PUBLIC AUCTION

If the option for a treasurer’s deed for your property is sold at a public auction for more than the total owed to the lawful holder of a tax lien on your property and to all other lien holders, please contact the treasurer’s office after the auction because you may have funds due to you.

Contact Us

Treasurer's Office

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

treasurer@bouldercounty.gov

eforeclosures@bouldercounty.gov

Mailing Address

PO Box 471
Boulder, CO 80306

Boulder

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

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Longmont

515 Coffman St.
Suite 113
Hours: 8 a.m. to 4:30 p.m.
Mondays only

Lafayette

1755 S. Public Road

Hours: 8 a.m. to 4:30 p.m.
Tuesdays Only
Open through Aug 26, 2025