Guide to County Taxes

The Douglas County Treasurer bills property taxes from the Tax Roll Warrant certified by the County Assessor. Collected taxes are then apportioned and distributed by the Treasurer to the various taxing authorities (authorities in your district are listed on your statement).

Mill Levies/Tax Rates are set by the taxing authorities (County Commissioners, School Boards, City Council and directors of districts). Taxes are calculated by multiplying the Assessor’s assessed value times the tax rate. The Treasurer does not determine either the tax rate or the assessed value.

Guidelines To Paying Your Taxes:

  • We do not bill your mortgage lender. If your taxes are paid into an escrow account as part of your monthly payment to your mortgage lender, it is your responsibility to verify that your taxes have been paid.
  • The Treasurer is not responsible for erroneous payments. If in doubt, please check with your mortgage lender to determine who is responsible for the tax payment.
  • Make Checks Payable to:  DOUGLAS COUNTY TREASURER for the exact amount. Checks must be drawn on a United States Bank account and payable in US Dollars. Please be aware that your payment check may be converted to a one time electronic payment and your checking account could be debited the same day payment is received.
  • To ensure accurate credit of your payment, please include the appropriate coupon(s) with your payment(s).
  • Mailing Addresses:
    • Tax payments and all other correspondence should be mailed to:
      P.O. BOX 1208
      CASTLE ROCK, CO 80104-1208
  • Payment Options / Due Dates:  You have the option to pay your taxes IN FULL BY APRIL 30, or in two installments – FIRST HALF BY THE LAST DAY OF FEBRUARY and SECOND HALF BY JUNE 15.
  • Any payment shall be deemed received by the Treasurer on the date it is actually received in the Treasurer’s office, and actual receipt will be presumed as of the date of the United States postal service postmark.  Envelopes must be accompanied by a United States postal service postmark if not received on or before the due date. Taxpayers who send their payments by mail are cautioned that the USPS only postmarks certain mail depending on the type of postage used, and may not postmark mail on the same day deposited by the taxpayer.  To ensure timely payment of your tax bill, please mail your payment early enough to account for unforeseen delays in mail handling.  IF THE DATE FOR FILING ANY TAX RETURN OR REMITTANCE FALLS UPON A SATURDAY, SUNDAY, OR LEGAL HOLIDAY, IT SHALL BE DEEMED TO HAVE BEEN TIMELY FILED IF FILED ON THE NEXT BUSINESS DAY. C.R.S. 39-10-104.5(8).
  • All payments will be accepted when a tax balance exists. First half payment overages will automatically be applied to the second half payment. Automatic refunds will only occur if taxes are deemed fully paid.
  • FAILURE TO PAY:  Failure of any person to receive their annual tax statement shall not preclude collection by the treasurer of the amount of taxes due and payable by such person (C.R.S. 39-10-103 (1)(a)). Applicable delinquent interest and other charges shall apply to delinquent payments (C.R.S. 39-10-104.5)

Current Year Delinquent Taxes:

Only the ENTIRE first half, second half or full payment plus accrued interest and fees can be accepted. Interest shall be calculated on delinquent taxes as provided as specified in the following table:

Paid during month of Late Interest Payment Option


1st Half

2nd Half

Less than $25.00







May 1% 3%

June 1-15 2% 4%

June 16-30 2% 4% 1% 2%
July 3% 5% 2% 3%
August 4% 6% 3% 4%
  • A $10 administrative fee will be added to delinquent tax payments of less than $50.00. C.R.S. 39-10-104.5(9).
  • TAX LIEN SALE : Delinquent REAL property taxes will be advertised once a week for three (3) consecutive weeks prior to annual tax lien sale for the amount of taxes, accrued interest, advertising, and other applicable charges (C.R.S. 39-11-102).
  • Delinquent MOBILE HOME – PERSONAL PROPERTY taxes will be advertised once and, AFTER OCTOBER 1, SHALL BE SUBJECT TO DISTRAINT, SEIZURE AND SALE . C.R.S. 39-10-111.
  • If your Personal Property Tax Statement shows a late filing fee, contact the Personal Property Division, County Assessor’s Office (303) 660-7448 for an explanation.
  • Prior year delinquent taxes MUST BE PAID IN CERTIFIED FUNDS. Postmarks are NOT accepted and do NOT apply towards a payment of a delinquent property tax lien.

Corrected Tax Statements

If you receive a corrected tax statement, PAYMENT IS DUE 30 DAYS AFTER DATE SHOWN ON CORRECTED STATEMENT.

Special And Local Improvement Districts (SIDS And LIDS)

County to collect municipal taxes, C.R.S. 31-20-106. It is the duty of the County Treasurer to collect municipal taxes in the same manner as real estate taxes; however, the delinquent real estate tax interest rates do not apply to SIDS or LIDS. The penalty is calculated on the unpaid principal balance of the entire special, NOT THE INSTALLMENT BILLED. Please contact the Treasurer’s office for the penalty amount when paying after the DUE DATES (303) 660-7455.

Additional Questions?

Call the TREASURER 303.660.7455 or email us at

Call the ASSESSOR 303.660.7450 for the following:

  • Address Changes
  • Property valuation/assessment
  • Personal property information
  • Legal descriptions