Colorado has some of the lowest property tax rates in the country. That is the headline. The reality is more complicated. Because while the rate is low, the home values are high. And in 2026, new legislation has changed how those values are assessed. If you own a home in Denver, you need to understand this. Your wallet depends on it.
Here is the basic math. Colorado's residential assessment rate for 2026 is 6.8% for local government taxes and 7.05% for school district taxes. This means if your home is worth $500,000, the assessed value is $34,000. The actual tax you pay is the assessed value multiplied by the mill levy, which varies by county and district. In Denver County, the effective tax rate is about 0.53%. So on a $500,000 home, you pay roughly $2,650 a year. Or $221 a month.
That sounds low compared to Texas at 1.6% or Illinois at 2.1%. On a $500,000 home, a Texas homeowner pays $8,000 a year. An Illinois homeowner pays $10,500. Colorado's $2,650 looks like a bargain. And it is. But here is the catch. Colorado home values have doubled in the past decade. Your tax bill might be low as a percentage, but it is high in absolute dollars. And it keeps going up.
In 2026, Colorado implemented SB24-233, which changed the assessment methodology. For tax years starting January 1, 2026, property valuation is based on 25% of actual value for some categories, while residential remains at the reduced assessment rate with a 10% reduction on the first $700,000 in actual value. This is supposed to provide relief. Whether it actually does depends on your specific home value and location.
I had a client in Highlands Ranch whose home value jumped from $480,000 to $620,000 in the 2025 reassessment. His tax bill went from $2,400 to $3,100. A $700 increase. He was furious. He had not done anything to his house. The market had just gone crazy. And now he was paying for it.
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Here is what homeowners need to know. Property taxes are not fixed. They change every two years when your county reassesses values. They also change when voters approve new mill levies for schools, fire districts, or infrastructure projects. You cannot control the assessment. But you can control your budget.
I recommend setting aside 1% of your home's value every year for property taxes and maintenance combined. On a $500,000 home, that is $5,000 a year. $2,650 for taxes. $2,350 for maintenance. Put it in a separate savings account. When the tax bill arrives, you are ready. When the furnace dies, you are ready. No panic. No credit cards.
The monthly budget calculator on our site has a homeowner mode that includes property taxes, insurance, HOA fees, and maintenance. Input your home value and location. It estimates your total monthly housing cost. Not just the mortgage. The real number. The one that determines whether you can actually afford your house.
The rent vs buy calculator is also relevant here because property taxes are a major factor in the ownership cost. When you compare renting at $2,200 a month to owning at $2,800 plus $221 in taxes plus $417 in maintenance, the gap is real. Make sure you are accounting for all of it.
And the 50/30/20 calculator helps you see if homeownership is pushing you into the danger zone. If your total housing costs exceed 40% of take-home pay, you are house-poor. That is a specific kind of stress. One that affects your marriage, your health, and your ability to handle any other financial surprise.
I also want to mention protesting your assessment. Every Colorado homeowner receives a Notice of Valuation by May 1. You have until June 1 to protest if you think the value is too high. I have had clients successfully reduce their assessed value by $50,000 to $100,000 by providing comparable sales data. That saves $300 to $600 a year in taxes. For an hour of work. Worth it.
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The process is simple. Go to your county assessor's website. Find the protest form. Gather evidence of comparable sales in your neighborhood. Submit it online or by mail. Most counties have streamlined this process. You do not need a lawyer. You do not need an appraiser. You just need data and a willingness to push back.
One last thing. If you are over sixty-five or disabled, Colorado offers property tax exemptions and deferrals. The Senior Homestead Exemption exempts 50% of the first $200,000 of actual value from taxation. That is real money. If you qualify, apply. Do not leave it on the table.
Property taxes in Colorado are a mixed bag. Low rates, high values, frequent changes. The key is to budget for them, protest when appropriate, and take advantage of every exemption you qualify for. Your home is probably your biggest asset. Protect it. And protect your budget from the surprises that come with it.
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FAQs
What is Colorado's property tax rate for 2026?
The residential assessment rate is 6.8% for local government taxes and 7.05% for school district taxes. Effective rates vary by county but average around 0.5%.
How much are property taxes on a $500,000 home in Denver?
Approximately $2,650 annually or $221 monthly, based on Denver County's effective rate of about 0.53%.
Can I protest my property tax assessment?
Yes. You have until June 1 to file a protest with your county assessor. Provide comparable sales data to support your case.
Are there property tax exemptions for seniors in Colorado?
Yes. The Senior Homestead Exemption exempts 50% of the first $200,000 of actual value for qualifying homeowners over 65.
How should I budget for property taxes?
Set aside 1% of your home's value annually in a separate account. This covers both taxes and maintenance, preventing surprises when bills arrive.
Table: Property Taxes by Colorado County
| County | Median Home Value | Effective Rate | Annual Tax |
|--------|------------------|----------------|------------|
| Denver | $533,060 | 0.53% | $2,825 |
| Arapahoe | $520,000 | 0.50% | $2,600 |
| Jefferson | $510,000 | 0.52% | $2,652 |
| Douglas | $580,000 | 0.49% | $2,842 |
| Boulder | $650,000 | 0.57% | $3,705 |
