Property Tax Due Dates

Certified funds are now required for all delinquent tax payments. Online tax payments have been disabled for the remainder of the year. You may still view tax account information, including copies of receipts, online.

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 2025

Two half payments

Feb. 28
June 16

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

Delinquent Interest Chart
Taxes Paid 1st Half Full 2nd Half
March 1% – –
April 2% – –
May 3% 1% –
June 1-16 4% 2% –
June 17-30 4% 2% 1%
July 5% 3% 2%
August 6% 4% 3%
September – December Contact our office for amount due

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
Office closed until late January 2026