Property Tax Due Dates

In Colorado, you can pay property taxes all at once or in two equal payments.

Payment Due Dates for 2026

March 2
June 15

April 30

Important Information About Payments:

Do not mail cash.
Make checks and money orders out to “Boulder County Treasurer.”
There are no discounts for early payment.
For taxes due this year, the postmark date on mailed payments is the date you paid. For tax lien redemptions, your payment date is when we receive your payment in the office.
You may owe extra fees if you make your payment after Aug 1.
After Sep. 1, pay only with certified funds (cashier’s check, money order, cash).

Please call or email our office for exact amounts if your payment is late.

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

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

P.O. Box 471
Boulder, CO 80306

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