Behind on Property Taxes in Colorado? Tax Lien Sales, the 2026 Rate, and the 3-Year Redemption Clock

A Colorado tax lien sale is not the day you lose the house. It is the day your county treasurer sells someone the right to collect your delinquent taxes with interest. That opens a window measured in years.

This guide follows C.R.S. Title 39 in order: the half-payment dates in Article 10, the treasurer's fall sale in Article 11, redemption under Article 12, and the rebuilt deed process in Article 11.5.

How Does a Colorado Tax Lien Sale Work?

A Colorado tax lien sale transfers a lien, not the property. The lien goes to whoever pays the taxes, delinquent interest, and fees due, or who pays the largest amount above that (C.R.S. 39-11-115).

Denver Treasury states it plainly: a tax lien is what the buyers are buying, not the property (City and County of Denver Treasury, 2026). You keep title and possession, and the holder cannot enter the house, collect rent, or ask anyone to leave.

Anything paid above that is a premium. It goes to the county general fund, earns no interest, and is never refunded (C.R.S. 39-11-115; Jefferson County Treasurer, 2026). Redemption is calculated on the taxes, interest, and fees only.

When Do Colorado Property Taxes Become Delinquent?

Colorado property taxes may be paid in full by the last day of April, or in two installments due the last day of February and by June 15 (C.R.S. 39-10-104.5). Delinquent interest then runs at 1% per month from March 1 and from June 16.

The single-payment route has a trap. Pay the full year by April 30 and no delinquent interest accrues. Pay in May and interest runs from May 1, not from the day you were late.

Colorado taxes actual value times the residential assessment rate times the total mill levy, the sum of every overlapping district. For 2025 that rate ran 7.05% for school levies and 6.25% for local government levies (Summit County Assessor, 2025).

Why the delinquency usually starts by accident

Most Colorado delinquencies are accidents. A loan gets paid off and the escrow account that handled the bill closes with it. An owner dies before probate opens. A rental sits vacant while mail goes elsewhere.

The Timeline, Step by Step

From a missed February installment to a treasurer's deed takes at least three and a half years, usually much longer. The table tracks a first half left unpaid in March.

The Certificate of Purchase and the 2026 Interest Rate

The certificate of purchase fixes what redemption will cost you. The treasurer prepares it describing the parcel, the interest rate, and the total taxes, interest, and fees paid, with columns for subsequent taxes (C.R.S. 39-11-117). It is assignable.

Redemption interest is set once a year, then frozen. The annual rate is nine percentage points above the federal discount rate, rounded to the nearest full percent, set September 1 and effective October 1 (C.R.S. 39-12-103).

Interest accrues for each month or portion of a month, so payoffs quoted on the 2nd and the 28th can be identical (City and County of Denver Treasury, 2026). Ask the treasurer for a current figure.

Subsequent taxes endorsed onto the lien

An untouched lien grows faster than the original bill suggests. When the next year goes delinquent, the holder may pay it and have the treasurer record it (C.R.S. 39-11-119). El Paso County notifies holders each August so they can endorse those taxes onto certificates they already hold (El Paso County Treasurer, 2026). Certificates do expire, though: no lien created by a certificate of purchase stays a lien longer than 15 years from issuance (C.R.S. 39-11-148).

Denver and El Paso County Specifics

The statute is identical statewide, but the calendar, fees, and online system are set county by county. The treasurer where the house sits is the authority on your parcel.

Two things stand out for Denver owners. The sale runs for weeks, so the date that matters is the October payment cutoff. And the fee schedule is small enough that interest, not fees, drives the balance. Our Denver cash buyer page covers timing a closing around a treasurer's deadline.

El Paso County treats a certificate as eligible for a deed application three years after the sale year, so one sold in 2023 became eligible in 2026 (El Paso County Treasurer, 2026). Owners in Colorado Springs should treat that third anniversary as the point when notices start arriving.

How Do You Redeem a Colorado Tax Lien?

You redeem by paying the treasurer the taxes, delinquent interest, redemption interest, and fees shown on the certificate. Colorado lets the owner, an agent, assignee, or attorney, any person having a legal or equitable claim, or a holder of a tax sale certificate do it (C.R.S. 39-12-103).

That breadth matters. A servicer holding a deed of trust has a legal claim, which is why many pay the taxes and add them to the loan. A title company closing a sale has the same standing.

Before sending money, get a written payoff good through a specific date, confirm whether later years were endorsed, and ask whether another certificate exists.

What Happens After Three Years?

After three years the certificate holder may apply to the treasurer for a public sale, the step that can produce a treasurer's deed. The application may be filed any time at least three years from the sale, and the treasurer may require a deposit for costs (C.R.S. 39-11.5-102).

Why the process changed: Tyler v. Hennepin County

In Tyler v. Hennepin County, decided May 23, 2023, the U.S. Supreme Court held that keeping value above an owner's tax debt violates the Takings Clause. Colorado's old law let a treasurer hand the holder a deed to the whole house on demand. The legislature rewrote it in HB24-1056, Issuance of Treasurer's Deeds, effective July 1, 2024.

A second 2024 bill handled manufactured housing. SB24-183, effective May 31, 2024, suspended the statutory process for the distraint sale of a mobile home to collect delinquent property tax and created a reform task force. Owners of manufactured homes should ask the treasurer how that applies.

Notice, the sale, and the surplus

The new process is built around notice. The treasurer mails a notice to the property address within 30 days of recording the application. A title search follows, the treasurer notifies known interested parties, and posts notice on the property 45 to 60 days before the sale (C.R.S. 39-11.5-104). Where assessed valuation reaches $500, it also runs weekly for three weeks.

The treasurer may accept only offers above the amount owed the holder plus fees and costs (C.R.S. 39-11.5-108). If nobody offers that much, the holder becomes the purchaser and the deed issues to them.

Anything above that minimum is where Tyler reaches your bank account. The surplus goes in recording priority to junior lienholders who filed a timely notice of intent to redeem, and the remainder to the owner (C.R.S. 39-11.5-109).

Options If You Have Delinquent Property Taxes in Colorado

A Colorado owner with delinquent property taxes has four realistic paths, and each stays open after the fall sale. Which fits depends on your equity and available cash.

• Pay before the sale. No lien is sold. Interest at 1% per month beats 13% redemption interest plus fees.
• Redeem the certificate. Open from the day after the sale until the parcel sells. Get a written payoff and check for endorsed years.
• Check the deferral and exemption programs. Genuinely useful, but read the eligibility rules first.
• Sell and pay the lien from the proceeds. Works any time before the deed issues, turning a growing debt into whatever equity remains.

Deferral and exemption programs, and their limits

Colorado's deferral program lends the tax payment rather than forgiving it. It is open to homeowners 65 and older and people called into military service, the window runs January 1 to April 1, and the loan sits as a junior lien until repaid. The rate was 4.238% in 2026 (La Plata County Treasurer, 2026).

Here is the catch. All previous property taxes must be paid in full, and a county cannot approve an application where delinquent tax liens sit against the parcel (La Plata County Treasurer, 2026; Summit County Treasurer, 2026). Deferral prevents a delinquency, it does not cure one.

The exemptions cut the bill going forward. Qualifying seniors and veterans with a disability receive a 50% exemption on the first $200,000 of actual value on a primary residence (Arapahoe County Assessor, 2026). Deadlines differ: July 15 for seniors, July 1 for the veteran and Gold Star spouse exemption, March 15 for the qualified senior primary residence classification (Larimer County Assessor, 2026).

If a lender is also foreclosing, the shorter clock controls. Colorado foreclosure runs through the county Public Trustee, with a cure right closing about 15 days before the sale and no post-sale redemption, so read our guide to stopping foreclosure in Colorado. Heirs whose taxes piled up while an estate sat unopened will also want our guide to selling an inherited house in Colorado.

Selling a Colorado House With Back Taxes

You can sell a Colorado house with delinquent property taxes on it, and the back taxes usually never leave your pocket. The title company pays the county from closing proceeds and the buyer takes clear title, as with a mortgage payoff. C.R.S. 39-12-103 lets a closing agent redeem a sold certificate at the table.

Colorado leaves more of the price available for the tax debt than most states do. There is no state estate tax, no inheritance tax, and no real estate transfer tax, only a documentary fee of $0.01 per $100 (C.R.S. 39-13-102, 39-13-104).

Equity is usually the larger number. Zillow's home value index for Denver sat near $533,060, down 2.7% year over year (Zillow ZHVI, July 2026), and Colorado Springs near $445,000 (Zillow ZHVI, June 2026).

The calendar is what a listing cannot promise. A financed buyer must clear underwriting and an appraisal, and older Front Range stock surfaces what a lender wants fixed first: dated wiring, a gravity furnace, a clay sewer line, a tired roof. Any one can push a closing past a fixed deadline.

Where a direct cash sale fits

A direct cash sale takes the financing calendar out of the problem. Propcash is a direct cash homebuyer, founded in 2026 and based in Nashville, and we buy houses across Colorado as-is: no repairs, no cleaning, no inspection contingency. Cash transactions can close in as few as 7 days, sellers pay no fees, and you pick the closing date.

The honest version matters more than the pitch. In year one of a certificate, with the house in good shape, listing may net you more, and Propcash will tell you so. If a treasurer has posted notice of a public sale, or an out-of-state owner is carrying a vacant house through another Colorado winter, a cash sale is often the cleaner exit. When you want a number to compare, get a cash offer on your house. The clock on this page belongs to your county treasurer, not to us.

Frequently Asked Questions

What happens if you do not pay property taxes in Colorado?

Delinquent interest accrues at 1% per month from March 1 on an unpaid first half and from June 16 on the second (C.R.S. 39-10-104.5). The treasurer mails a notice by September 1, advertises the parcel for three weeks, and sells a tax lien at a public sale held on or before the second Monday in December. The sale transfers a lien, not the house.

How long do you have to redeem a Colorado tax lien?

Colorado does not cut redemption off at three years. Under C.R.S. 39-12-103 a tax lien may be redeemed any time before a treasurer's deed is executed, and the holder cannot apply for the deed process until three years after the sale. In practice the window closes when the parcel sells at the treasurer's public sale of a certificate of option for treasurer's deed.

What interest rate does a Colorado tax lien earn in 2026?

Liens sold at Colorado's 2026 tax lien sales carry redemption interest of 13% per year, about 1.08333% per month (El Paso County Treasurer, September 2026; City and County of Denver Treasury, 2026). The rate is set each September 1 at nine percentage points above the federal discount rate, rounded to the nearest full percent, and stays fixed for that certificate's life (C.R.S. 39-12-103).

Can you sell a Colorado house with delinquent property taxes on it?

Yes. Delinquent taxes and any sold certificate are a debt attached to the parcel, not a bar on transferring it. The title company pays the county from closing proceeds so the buyer takes clear title, and C.R.S. 39-12-103 lets any person with a legal or equitable claim redeem the lien. What remains after the lien, any mortgage payoff, and closing costs is yours.

When is the Denver tax lien sale held?

Denver runs its tax lien sale online each fall, usually around the first part of November. The 2026 sale opened October 12 and closed November 4. The deadline to pay and keep a parcel out of it was 3:30 p.m. on Friday, October 30, 2026 (City and County of Denver Treasury, 2026). Jefferson County set its own online sale for November 12 and 13, 2026 (Jefferson County Treasurer, 2026).

Can the senior property tax deferral program help with taxes that are already delinquent?

Generally no, and that catches people out. Colorado's deferral program covers homeowners 65 and older and people called into military service. It requires all previous property taxes to be paid in full, and a county cannot approve an application where delinquent tax liens sit against the parcel (La Plata County Treasurer, 2026). The window runs January 1 to April 1, so it prevents a delinquency rather than curing one.

Sources: C.R.S. 39-10-104.5; 39-11-101; 39-11-102; 39-11-109; 39-11-148; 39-12-103; HB24-1056; SB24-183; Denver Treasury; El Paso County Treasurer; Jefferson County Treasurer; Larimer County Assessor; La Plata County Treasurer; Zillow ZHVI. Propcash is a direct cash homebuyer, not a law firm. Confirm balances and dates with your treasurer.