Property tax amounts for 2025 payable in 2026 will be available later in January, after we receive, review, and process the tax roll from the County Assessor.

Property Tax Due Dates

The State of Colorado allows property taxes to be paid either in two equal installments, or in full, by the dates shown below.

Payment Due Dates for 2026

Two half payments

March 2
June 15

Full payment

April 30

No discounts for early payment
Postmark accepted for tax payments mailed to our office (except tax lien redemptions)
Additional fees assessed for payments made after August 1st
Certified funds (cashier’s check, money order, cash) required after September 1st (do not mail cash payments)
Please contact our office for exact amounts if your payment is late

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

Look up / pay property taxes

Date Taxes Paid	First Half Payment	Full Payment	Second Half Payment
March	1%	Not delinquent	Not delinquent
April	2%	Not delinquent	Not delinquent
May	3%	1%	Not delinquent
June 1-15	4%	2%	Not delinquent
June 16-30	4%	2%	1%
July	5%	3%	2%
August	6%	4%	3%
September to December	Contact our office	Contact our office	Contact our office

Contact Us

Treasurer's Office

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

treasurer@bouldercounty.gov

eforeclosures@bouldercounty.gov

Mailing Address

P.O. Box 471
Boulder, CO 80306

Boulder

1325 Pearl St.
Boulder, CO 80302
1st Floor
Hours: 8 a.m. - 4:30 p.m.
Monday - Friday

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Longmont

515 Coffman St.
Longmont, CO 80501
Suite 113
Hours: 8 a.m. - 4:30 p.m.
Mondays only

Lafayette

1755 S. Public Road
Lafayette, CO 80026

Hours: 8 a.m. - 4:30 p.m.
Tuesdays Only
Open Jan. 27 through Sep. 1, 2026