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Property tax foreclosure in Colorado

Colorado is a tax lien state. If your property taxes go unpaid, the county treasurer sells a tax lien on your home at a yearly sale, and the buyer gets a certificate of purchase, not your home. About three years later the lien holder can apply for a treasurer's deed, and since a 2026 law the treasurer must then sell the home at a public auction where any amount over the debt is paid out to junior lienholders and then to you. You can redeem by filing an intent to redeem at least 7 days before the auction and paying what is owed.

Reviewed against Colorado law and official sources on October 11, 2026. General information, not legal advice.

The property tax process in Colorado, step by step

  1. Taxes become delinquent

    Last day of February, April 30 or June 15

    You can pay in two halves, due by the last day of February and June 15, or in full by April 30. Late taxes carry delinquent interest of 1 percent per month.

    C.R.S. § 39-10-104.5

  2. Notice and tax lien sale

    Notice by September 1; sale by the second Monday in December

    By September 1 the county treasurer mails a notice of the unpaid amount and the date of the tax lien sale, giving at least 15 days to pay. The sale is advertised for four weeks and must start on or before the second Monday in December. The buyer of the lien gets a certificate of purchase; you still own and live in your home.

    C.R.S. §§ 39-11-101, 39-11-102, 39-11-109, 39-11-117

  3. Redeem the lien

    Any time before the treasurer's deed process ends

    You redeem by paying the treasurer the taxes, interest and costs the lien was sold for, plus any later taxes the lien holder paid, with redemption interest. The yearly redemption rate is 9 points above the federal discount rate, set each September 1 by the state banking commissioner, and part of a month counts as a whole month.

    C.R.S. § 39-12-103

  4. Lien holder applies for a deed

    After August 1 of the third year after the lien sale

    The lien holder can then apply for a treasurer's deed. The treasurer records the application, mails you a notice within 10 days, and orders a title search to build a mailing list of you, any occupant and junior lienholders.

    C.R.S. §§ 39-11.5-102 to 39-11.5-104

  5. Notice of public auction

    Auction 30 to 60 days after the notice is mailed

    The treasurer mails a notice of public auction to everyone on the mailing list, posts it on the property at least 30 days before the auction, and publishes it for three weeks in most cases. The first auction date must be 30 to 60 days after the notice is mailed, and it can be continued for up to 12 months.

    C.R.S. §§ 39-11.5-105, 39-11.5-109, 39-11.5-111

  6. Last chance to redeem

    File at least 7 days before the auction

    File an intent to redeem with the treasurer no later than 7 calendar days before the scheduled auction. The treasurer gives you a redemption statement within 3 business days, and you must pay before it expires, which is 10 business days or noon the day before the auction, whichever comes first. The fee to file is no more than $25, and you must redeem the whole property.

    C.R.S. § 39-11.5-106

  7. Auction, deed and your share of the overbid

    Title passes 8 business days after the auction

    The lien holder bids the full debt, and anyone may bid more. Title passes to the winning bidder after 8 business days, free of junior liens. Money bid above the debt and costs goes first to junior lienholders who file claims within 8 business days, then to you; the treasurer must mail you a notice within 30 days after that claim period ends.

    C.R.S. §§ 39-11.5-107, 39-11.5-112, 39-11.5-303, 39-11.5-501

Common questions in Colorado

Does someone who buys my tax lien in Colorado own my house?

No. The buyer of a tax lien gets a certificate of purchase that earns interest until you redeem. Only after the deed process and a public auction can the home change hands, and you can still redeem until 7 days before that auction by filing an intent to redeem.

What changed in Colorado's tax deed process in 2026?

SB26-144 rewrote the treasurer's deed process starting June 1, 2026. Every treasurer's deed issued on or after that date must go through a public auction run like a public trustee sale, so a home is not simply handed to the lien holder. The bill summary says the auction protects owners from losing value above their tax debt.

How do I claim my overbid after a Colorado tax deed auction?

Contact the county treasurer's office after the auction, since the treasurer holds the overbid in escrow. Unclaimed amounts of $25 or more can go to the State Treasurer as unclaimed property after two years, and you can claim them there for free. An agreement to pay someone to recover a transferred overbid is enforceable only if signed at least two years after the transfer and only for up to 10 percent.

Can Colorado seniors or military members put off their property taxes?

Yes. The state Property Tax Deferral program lets homeowners 65 and older and active military members defer property taxes as a simple interest loan recorded as a lien. You apply through your county treasurer between January 1 and April 1, and you must reapply each year.

Step by step

More on foreclosure in Colorado

Understand the process

What is happening and how much time there is.

Weigh your options

What can stop it, and what happens if it goes ahead.

Get help now

Who to call, and what to do when a sale is scheduled.

Also in Colorado

Property tax foreclosure (this page)Claim surplus funds

Back to the Colorado overview

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Sources for this page

  1. Colorado Revised Statutes 2026, Title 39 (Taxation), including Article 11.5
  2. SB26-144: Modify Property Tax Lien Sales Treasurer Deeds and Fees
  3. Colorado State Treasury: Unclaimed Property
  4. Colorado Revised Statutes 2026, Title 38 (Office of Legislative Legal Services), including C.R.S. 38-38-100.3 to 38-38-705 and 38-13-1304
  5. Colorado Revised Statutes 2026, Title 6, including the Foreclosure Protection Act, C.R.S. 6-1-1101 to 6-1-1121
  6. Colorado Revised Statutes 2026, Title 13, including C.R.S. 13-40-104
  7. Colorado General Assembly: 2026 CRS Titles for Download
  8. Colorado General Assembly: HB26-1098, modifications to the Colorado Public Trustee Act
  9. Colorado General Assembly: HB25-1043, protection of unit owners in association enforcement actions
  10. Colorado General Assembly: HB24-1337, rights of unit owners in collection of amounts owed
  11. Colorado Judicial Branch: Residential Foreclosures (self-help)
  12. Colorado Division of Housing: Emergency Mortgage Assistance Program
  13. U.S. Department of the Treasury: Homeowner Assistance Fund
  14. Colorado State Treasurer: Property Tax Deferral Program Overview
  15. CHFA: Foreclosure Prevention
  16. Colorado Attorney General: Consumer Credit Unit
  17. Colorado Attorney General: File a Complaint