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If you don’t pay property taxes in Colorado, the problem can grow faster than many homeowners expect. It usually starts with interest and notices, but it can eventually lead to a tax lien sale and, in the worst case, the loss of your home.
Colorado collects property taxes one year in arrears. That means the taxes you owe today were based on last year’s property value. If those taxes go unpaid, the county treasurer can sell the lien on your property to a private investor. If you do not redeem that lien in time, that investor can later move toward forcing a sale.
The main thing is to act early. Contact your county treasurer, find out exactly what is owed, and look at your options before the balance grows. Below is what property taxes are, what happens when they go unpaid, and what steps may help protect your home.
Property taxes in Colorado are annual taxes homeowners pay to the county. The amount is based on the assessed value of the property. These taxes help fund schools, fire departments, parks, libraries, roads, and other local services.
They are different from HOA dues. HOA dues are owed to a private association. Property taxes are owed to the government, and the county has legal tools to collect them.
Colorado assesses property taxes one year in arrears. For example, 2025 property taxes are collected in 2026. Taxes are levied on January 1 and become payable on January 1 of the following year. If they remain unpaid, they become delinquent on June 16 of that collection year.
Key point: Property taxes are tied to the property, not just the owner. If they go unpaid, the county can sell the tax lien.
Property taxes in Colorado vary quite a bit. Your bill depends on where the home is located, what type of property it is, the assessed value, and the local mill levy.
The county assessor determines your home’s actual value. That value is then multiplied by an assessment rate to create the taxable assessed value. For 2025 taxes, residential property uses two different assessment rates, one for school districts and one for other local governments.
Local taxing authorities set their own mill levies each year. This can include school boards, cities, counties, and special districts. Your tax bill is based on your assessed value multiplied by the combined mill levy for your area.
Location plays a big role. Homes in Denver, Boulder, Jefferson County, and other higher-value areas often have larger tax bills. Rural counties tend to have lower values and, in many cases, lower bills.
Single-family homes, condos, townhomes, commercial properties, and other property types can be assessed differently. Residential and non-residential property do not always follow the same rules under Colorado law.
Some homeowners may qualify for exemptions. The Senior Property Tax Exemption and Disabled Veteran Exemption can reduce the taxable value of a home. That can make a real difference, especially for owners on a fixed income.
When property taxes go unpaid in Colorado, the process follows a fairly clear path. It does not usually happen overnight, but it does get more serious the longer you wait.
Once property taxes become delinquent, interest starts to accrue. This can happen after the full-payment deadline of April 30 or after the second-half payment deadline of June 15. The interest rate is 1% per month on the unpaid balance.
That may not sound like much at first, but it adds up. A manageable tax bill can become much harder to deal with once interest, fees, and later charges are added.
After the June 15 deadline passes, the county treasurer usually mails a delinquent tax notice in early July. The notice goes to the owner of record and shows the amount owed.
It also warns that more serious collection steps may follow. One detail homeowners sometimes miss is that not receiving the notice does not remove the duty to pay. The tax still remains due.
By September, delinquent property taxes are usually advertised in a local newspaper for three straight weeks. This public notice tells the public that the tax lien is scheduled for sale.
This step can feel embarrassing for homeowners. It turns a private financial issue into something that appears in public records.
Colorado counties hold annual tax lien sales, usually in October or November. They must be held no later than the second Monday in December.
At the sale, often held online, private investors can buy the lien on your property. The investor pays the delinquent taxes to the county. You then owe the investor, plus interest, instead of simply owing the county.
The investor receives a Certificate of Purchase. That certificate becomes a recorded lien against the property.
Once an investor holds the certificate, they may also pay later years of delinquent taxes. Those amounts can be added to the lien.
This is where the problem can snowball. The original tax bill may have been one number, but later taxes, interest, and fees can turn it into a much larger payoff amount.
Before 2024, a homeowner in Colorado could lose all equity through a tax sale, even if the home was worth much more than the tax debt. That raised serious fairness concerns.
Colorado updated its law after the U.S. Supreme Court decision in Tyler v. Hennepin County. In that case, the Court held that it is unconstitutional for the government to keep more equity than needed to cover the tax debt.
Under Colorado’s updated process, any overbid from a public auction must be paid first to junior lienholders in order of priority. Any remaining surplus then goes to the property owner. That is an important protection for homeowners who still have equity.
If you do not redeem the lien within three years of the tax lien sale, the certificate holder can apply for a public auction. If the property sells, the proceeds are distributed based on lien priority. Any remaining surplus should go to you.
That said, once the treasurer issues a deed to the buyer, you lose ownership. Tax liens are serious because they usually have priority over nearly every other lien, including mortgages.
That is why mortgage lenders watch property taxes closely. If taxes become delinquent, the lender may pay them for you, then add that amount to your loan balance.
If your mortgage has an escrow account, your lender collects part of your estimated property taxes each month. The lender then pays the tax bill for you. In that setup, missed property tax payments are less likely unless there is an escrow issue.
If your mortgage is not escrowed, you are responsible for paying the county directly. This is common with paid-off homes and some loan types.
If taxes become delinquent, your lender will likely step in and pay them. The lender does this because a property tax lien can come ahead of the mortgage. After paying the taxes, the lender may add the amount to your loan balance, require repayment, or even start its own foreclosure process.
Important: Unpaid property taxes can create a mortgage problem, even if you have never missed a mortgage payment.
This case did not happen in Colorado, but it changed the way many states looked at tax sales. In Tyler v. Hennepin County, a 94-year-old woman owed about $2,300 in property taxes. With penalties and interest, the debt grew to about $15,000.
The county foreclosed on her condo, sold it, and kept the full proceeds, including her equity. The U.S. Supreme Court ruled that was unconstitutional.
Colorado later updated its own laws in response. The lesson is simple. Even a small unpaid tax bill can become a much bigger threat if it is ignored.
A Denver-area homeowner fell behind on property taxes during a rough financial stretch. At first, the unpaid taxes were only a few thousand dollars.
Then interest began to build. A private investor bought the lien at the annual tax lien sale. After three years of inaction, the investor applied for a deed.
The homeowner was caught off guard by how far the process had gone. They had to scramble to redeem the property at the last minute and ended up paying far more than the original tax bill.
Inherited homes can create tax problems when heirs do not know taxes are unpaid. This happens more often than people think.
An heir may assume everything is current, only to later find out that several years of taxes, interest, and fees have stacked up. In one case, an heir discovered that a tax lien certificate had already been sold years earlier. The three-year redemption period was nearly over.
They had to pay the full redemption amount under heavy time pressure. That included the original taxes, accrued interest, and fees.
If you are struggling to pay your property taxes, do not wait. The earlier you deal with it, the more choices you usually have.
Call your county treasurer’s office and ask for the exact payoff amount. They can explain deadlines, payment options, and any programs that may apply.
This is usually the best first step. Guessing at the amount owed, or hoping the issue goes away, rarely helps.
Colorado has a Property Tax Deferral Program for some qualifying homeowners, including seniors and active military members. The program may allow you to postpone property tax payments until the home is sold or transferred.
Under recent changes from SB25-261, county treasurers now handle the application process. Contact your local treasurer’s office to apply.
The Senior Property Tax Exemption can reduce the assessed value of a qualifying senior’s primary home. Veterans with a service-connected disability may also qualify for a valuable exemption.
These programs may not fix past-due taxes, but they can help lower future bills.
If your lien has already been sold, you still have a three-year redemption period. During that time, you can pay the full amount owed and clear the lien.
Do not wait until the end if you can avoid it. Interest continues to grow, and the final redemption amount can be much higher than the original tax debt.
Once the investor applies for a public auction, the pressure increases. Your time to redeem becomes more limited.
If you are close to the three-year mark, speak with the treasurer’s office right away. It may also be smart to talk with a real estate attorney.
If the taxes are unmanageable and you have equity, selling may be the cleanest way out. A sale can pay off the taxes, clear the lien, and let you keep the remaining equity.
This is especially important if the tax sale process is already far along.
Colorado law gives homeowners several rights when property taxes become delinquent.
The county treasurer must mail notice of delinquency and give notice before the tax lien is advertised and sold. If proper notice was not given, there may be grounds to challenge the sale.
You have a three-year redemption period after the tax lien sale. During that time, you can pay the full amount owed, including interest, fees, and later taxes paid by the lienholder.
Once paid, you can reclaim clear title to the property.
Under Colorado’s updated law after Tyler v. Hennepin County, you should not lose more than the tax debt itself. If the property sells at auction for more than what is owed, surplus funds must be paid out after other lienholders are handled.
Any remaining surplus goes to the property owner.
Qualifying homeowners have the right to apply for property tax deferral under state law. This can help avoid delinquency while allowing the owner to stay in the home.
Apply through your county treasurer.
If you believe the county overvalued your property, you can appeal the assessment. A successful appeal can lower the taxable value and reduce your property tax bill.
Appeals are usually filed with the county assessor in the spring of the assessment year.
If the county or lienholder takes action and you believe the proper steps were not followed, you can seek legal help. An attorney may be able to help with redemption, sale issues, notice problems, or a challenge to the process.
Yes. In Colorado, unpaid property taxes can lead to the loss of your home. The process usually moves in this order:
The good news is that homeowners often have time to act. Even late in the process, you may be able to redeem the lien, apply for a deferral, refinance, or sell before ownership is lost.
The bad news is that ignoring the issue almost always makes it worse. Interest and fees keep growing. If you have a lot of equity, waiting too long can put that equity at risk.
A small tax bill should not turn into the loss of a home. But that can happen when nobody acts in time.
If property taxes have become too much to handle, selling the home may be the most practical solution. Your best option depends on how much time you have, how much equity is in the home, and whether a lien has already been sold.
Listing with a real estate agent may bring the highest sale price. The downside is time.
If your redemption period is running, you may not have months to wait for the right buyer. Any unpaid taxes or tax liens will also need to be disclosed and paid at or before closing.
If you need a faster sale, a local Denver cash home buyer may be able to help. Cash buyers like New Era Home Buyers purchase homes as-is, including homes with back taxes, liens, repairs, and title issues.
A cash sale can often close in days instead of months. That may allow you to pay off the tax debt and keep your remaining equity before the situation gets worse.
If the home is worth less than the mortgage and tax debt combined, a short sale may be an option. In a short sale, the lender agrees to let the home sell for less than what is owed.
This takes lender approval and usually moves slower than a normal sale. Still, it may help you avoid foreclosure.
If the tax issue has pushed your mortgage lender toward foreclosure, a deed-in-lieu may be possible. This means you give the property back to the lender in exchange for forgiveness of the mortgage debt.
This is usually a last-resort option. It can still hurt your credit, but it may avoid a longer foreclosure process.
If you do not want to sell, the Colorado Property Tax Deferral Program may buy you time. It does not erase the debt. But it may stop the delinquency problem from getting worse while you decide what to do next.
Colorado homeowners can pay property taxes in full by April 30. They can also pay in two half-payments. The first is due by February 28, or the last day of February. The second is due by June 15. Taxes become delinquent on June 16 if unpaid. Interest starts right away.
Property tax amounts vary by county, property type, assessed value, and local mill levies. Your bill is based on your property’s assessed value multiplied by the total mill levy for your taxing district. For a closer estimate, contact your county assessor.
Yes. Your tax bill can go up if your assessed value rises or if local taxing authorities raise mill levies. Colorado reassesses property values every two years. Recent laws have limited some property tax revenue growth, but individual bills can still change.
Not receiving a notice does not remove your duty to pay. Colorado law still requires property owners to pay taxes whether or not the bill arrives. If you have not received your notice by mid-February, contact your county treasurer and ask for a duplicate.
No. If you own real property in Colorado, you are legally required to pay property taxes. You cannot opt out. But you may qualify for exemptions or deferral programs that lower the bill or delay payment.
Yes. Property taxes on your primary residence are generally deductible on your federal tax return, unlike HOA dues. The deduction is subject to the $10,000 SALT cap for state and local taxes.
You can appeal your assessment with the county assessor. Appeals are usually filed in the spring of the assessment year. If your appeal is successful, it can lower your taxable value and reduce your tax bill.
Yes. You can sell a home with delinquent property taxes. The unpaid taxes, interest, fees, and lienholder reimbursements are usually paid from the sale proceeds at closing. A cash buyer may be able to handle this more quickly than a traditional buyer.
A tax lien sale is a public auction where the county sells the right to collect delinquent property taxes to private investors. The investor pays your tax debt to the county. You then owe the investor, plus interest, until you redeem the lien or the property is sold.
Colorado gives you a three-year redemption period from the date of the tax lien sale. During that period, you can pay the full amount owed and reclaim clear title to your home.
Delinquent property taxes can make a homeowner feel boxed in. Interest keeps growing, notices become more serious, and the threat of a lien sale or public auction can add a lot of pressure.
At New Era Home Buyers, we buy houses in Denver from homeowners who need a fast, clear way to sell. That includes homes with back taxes, liens, repairs, or other issues that may scare off a traditional buyer.
We handle the details, explain the process, and can close in days. If unpaid property taxes are putting your home at risk, reach out before the situation gets harder to fix.