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Property Tax Due Dates
Tax payments have been disabled on our website because it will not allow you to make a late payment without interest, as permitted by our current Tax Payment Policy. You can still pay by mail or in our offices. Please contact us if you have questions.
Our offices in Longmont and Lafayette are now open. The Longmont office is open Mondays and Lafayette is open Tuesdays.
There are resources available to you during this time. Please check out our list of resources for people affected to find out more.

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 2021

Two half payments

March 1
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

Delinquent Interest Chart

Taxes Paid 1st Half Full 2nd Half
March (after March 1) 1%
April 2%
May 3% 1%
June 1-15 4% 2%
June 16-30 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 Email

Foreclosures

Mailing Address

PO Box 471
Boulder, CO 80306

Boulder

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

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Longmont

515 Coffman St.
Suite 113
Map & Directions
Hours: 8 a.m. - 4:30 p.m.
Mondays Only

Lafayette

1376 Miners Dr.
Unit 105
Map & Directions
Hours: 8 a.m. - 4:30 p.m.
Tuesdays Only