When are property taxes due in Boulder County, Colorado?

Boulder County property taxes are due February 28. A second installment is due June 15. This deadline applies to all counties in Colorado.

What is the penalty for late property tax payment in Boulder County, Colorado?

The late payment penalty in Boulder County is 1% per month after due date.

How do I pay Boulder County, Colorado property taxes?

You can pay Boulder County property taxes by mail to the county treasurer.

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Boulder County Property Tax Due Date

Name: Treasurer
Address: 1325 Pearl St., Boulder, CO, 80302, US
Telephone: (303) 441-3520

Colorado

(303) 441-3520

2026 Property Tax Due Dates

Official Source

Installment 1

February 28

First half (or full by April 30)

Installment 2

June 15

Second half

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Penalty: 1% per month after due dateGrace period: None

Payment Methods

Online, Mail, In-Person

Boulder County Treasurer

Phone

(303) 441-3520

treasurer@bouldercounty.gov

Office Address

1325 Pearl St.
Boulder, CO 80302

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Mailing Address

P.O. Box 471, Boulder, CO 80306

Office Hours

Mon-Fri 8am - 4:30pm

How to Pay

Online

Pay using credit card or e-check

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By Mail

Mail check payable to Boulder County Treasurer — P.O. Box 471, Boulder, CO 80306

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In Person

Visit the Treasurer's office — 1325 Pearl St., Boulder CO 80302, Mon-Fri 8am - 4:30pm

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Other Counties in Colorado

Adams Alamosa Arapahoe Archuleta Baca Bent Broomfield Chaffee

View all Colorado counties →

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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.