Colorado has one of the lowest effective property tax rates in the nation at 0.51%, ranking among the bottom three states. The state uses a unique assessment system that applies different statutory assessment rates to residential vs. non-residential properties, while the Taxpayer’s Bill of Rights (TABOR) strictly limits revenue growth. Following the 2024 legislative special session (HB24B-1001), Colorado has adopted a new bifurcated rate structure for school districts versus local governments (est., Tax Foundation 2026 / U.S. Census ACS 2023).
Colorado property taxes are among the lowest in the United States. With an effective rate of approximately 0.51%, a median-priced Colorado home of $530,000 generates roughly $2,703 in annual property taxes. By comparison, that same home in neighboring Nebraska (1.61%) would incur over $8,500 in taxes. Colorado’s low rates are historically tied to the Gallagher Amendment (repealed in 2020) and the ongoing strict revenue caps enforced by the Taxpayer’s Bill of Rights (TABOR), which prevents local governments from increasing mill levies without a public vote.
Colorado Assessment Rates and Calculation Mechanics
Unlike most states that apply a local tax rate directly to a home’s full market value, Colorado uses a fractional assessment system governed by the Colorado Division of Property Taxation. The assessor determines the home’s “Actual Value,” multiplies it by a statutory “Residential Assessment Rate” (RAR) to get the “Assessed Value,” and then multiplies that by the local “Mill Levy.”
For tax year 2024 (payable in 2025), the residential assessment rate is 6.70%, and a temporary exemption subtracts $55,000 from the home’s actual value before calculation. Starting in tax year 2025, a landmark legislative compromise (HB24B-1001) creates a new bifurcated system where two different assessment rates will apply simultaneously: one rate for school district taxes (7.05%) and a lower rate for local government taxes (6.25% in 2025, 6.80% in 2026 with a 10% value deduction up to $700,000).
A “mill” represents $1 of tax for every $1,000 of assessed value. Your total mill levy is the sum of levies from the county, city, school district, and various special districts (like fire, water, and library districts). Because special districts are prevalent in Colorado, properties in the same zip code can have noticeably different total mill levies.
Colorado statewide effective rate. On a $530,000 home, expect approximately $2,703 per year at the statewide average. Actual bills depend on your specific local and school district mill levies (est., Tax Foundation 2026 / Census ACS 2023).
| Home Value | Annual Tax (est.) | Monthly Payment | vs. U.S. Average |
|---|---|---|---|
| $350,000 | $1,785 | $149 | -$1,365 below avg. |
| $530,000 | $2,703 | $225 | -$2,067 below avg. |
| $750,000 | $3,825 | $319 | -$2,925 below avg. |
| $1,000,000 | $5,100 | $425 | -$3,900 below avg. |
| $1,500,000 | $7,650 | $638 | -$5,850 below avg. |
Estimates use 0.51% statewide effective rate. U.S. average uses 0.90%. No senior exemptions applied. Source: est., Tax Foundation / Census ACS 2023.
Senior and Disabled Veteran Exemptions
The Senior Property Tax Exemption is one of Colorado’s most popular relief programs, enshrined in the state constitution. It exempts 50% of the first $200,000 of actual value of a primary residence (providing a maximum reduction of $100,000 in actual value). To qualify, the property owner must be at least 65 years old as of January 1 and must have owned and occupied the property as their primary residence for at least 10 consecutive years. The State of Colorado reimburses local governments for the tax revenue lost to this exemption.
The Disabled Veteran Property Tax Exemption provides the exact same benefit (50% of the first $200,000 in actual value) to honorably discharged veterans who are rated 100% permanent and total disabled by the VA due to a service-connected disability. In 2022, Colorado voters passed an amendment expanding this eligibility to include Gold Star Spouses (surviving spouses of armed forces members who died in the line of duty or from a service-connected disability).
| Program | Benefit | Who Qualifies | Filing Deadline |
|---|---|---|---|
| Senior Property Tax Exemption | Exempts 50% of first $200,000 of actual value (max $100,000 reduction) | Age 65+; owned and occupied primary residence for 10 consecutive years | July 15 (file with County Assessor) |
| Disabled Veteran Exemption | Exempts 50% of first $200,000 of actual value (max $100,000 reduction) | 100% VA rated permanent/total disabled from service-connected disability | July 1 annually (file with Div. of Veterans Affairs) |
| Gold Star Spouse Exemption | Exempts 50% of first $200,000 of actual value (max $100,000 reduction) | Surviving spouses of military personnel who died in the line of duty | July 1 annually (file with Div. of Veterans Affairs) |
| 2024 Temporary Value Reduction | $55,000 reduction from actual value (Tax Year 2024 only) | All residential properties automatically; expires after 2024 | Automatic (no filing required) |
The Reappraisal Cycle and TABOR
Colorado counties operate on a mandatory 2-year reappraisal cycle occurring in odd-numbered years (2023, 2025, 2027). The appraisal data collection period ends on June 30 of the even-numbered year preceding the reappraisal. For example, the 2025 values will be based on market data collected through June 30, 2024. In even-numbered intervening years, values typically remain unchanged unless there is an “unusual condition” like new construction or demolition.
The Taxpayer’s Bill of Rights (TABOR), passed as a constitutional amendment in 1992, severely restricts how local governments can tax and spend. TABOR explicitly prohibits any local taxing district from increasing its mill levy without advance voter approval. Furthermore, it limits annual property tax revenue growth for a district to the rate of inflation plus the rate of local growth (new construction). If property values spike during a reappraisal year and generate revenue exceeding the TABOR cap, the district must issue “temporary mill levy credits” to artificially lower the tax rate for that year to stay within legal limits. To avoid this, many districts ask voters to “De-Bruce” (named after TABOR author Douglas Bruce), passing a local ballot measure to opt out of the revenue retention caps while keeping the voter-approval requirement for tax rate increases.
Major County Tax Rates in Colorado
Property tax rates in Colorado exhibit less wild variance than in other states due to TABOR and state-imposed assessment rates, but differences still arise primarily from overlapping special districts. El Paso County (Colorado Springs) registers the lowest effective rate among major population centers at 0.41%. Adams County holds the highest rate at 0.60%, driven by varied municipal and school district levies in the Denver metro periphery.
Denver County sits below the state average at 0.44%, while heavily populated suburban counties like Arapahoe, Douglas, and Boulder hover between 0.53% and 0.55%. The data below reflects effective rates (actual taxes paid divided by home value) to account for all overlapping taxing authorities.
| County | Effective Rate | Annual Tax on $530k Home | Notes |
|---|---|---|---|
| El Paso County | 0.41% | $2,173 | Most populous county (Colorado Springs); lowest effective rate among top 10. |
| Denver County | 0.44% | $2,332 | Consolidated city-county government structure. |
| Arapahoe County | 0.53% | $2,809 | Slightly above state average; diverse mix of municipalities and special districts. |
| Jefferson County | 0.47% | $2,491 | Large suburban county west of Denver; below state average. |
| Adams County | 0.60% | $3,180 | Highest effective rate among top 10 most populous counties. |
| Douglas County | 0.55% | $2,915 | High-income suburban county south of Denver. |
| Boulder County | 0.54% | $2,862 | Northwest of Denver; slightly above state average. |
| Larimer County | 0.50% | $2,650 | Includes Fort Collins; tracks very closely to state average. |
| Statewide Average | 0.51% | $2,703 | All owner-occupied properties statewide (Census ACS 2023). |
The 2024-2025 Legislative Overhaul (HB24B-1001)
The repeal of the Gallagher Amendment in 2020 left the state legislature in charge of setting assessment rates. A massive surge in home values during the 2023 reappraisal cycle threatened homeowners with historic tax increases, prompting a prolonged legislative battle throughout 2023 and 2024. With conservative groups placing Initiatives 50 and 108 on the November 2024 ballot (which would have imposed devastating revenue cuts on local governments), Governor Jared Polis called an emergency special legislative session in August 2024.
The resulting compromise, HB24B-1001, secured the withdrawal of the ballot initiatives in exchange for structural, permanent property tax relief starting in 2025. It introduces a highly unusual bifurcated system where a home will have two different assessed values: one for school districts and one for all other local governments.
For tax year 2025, school taxes will be calculated using a 7.05% assessment rate, while local government taxes will use a 6.25% assessment rate. For 2026 and beyond, the local government rate climbs slightly to 6.80%, but incorporates a 10% actual value deduction (up to $70,000) before calculation. The bill also establishes strict revenue growth caps, preventing local government property tax revenues from growing more than 5.25% annually (10.5% over a 2-year cycle) without local public hearings and board override votes.
Disclaimer and Methodology
This calculator provides estimates for planning purposes only, based on effective property tax rates (actual median taxes paid divided by median home values). Colorado utilizes a fractional assessment system where the statutory residential assessment rate (e.g., 6.70% for 2024) is applied to actual value to determine assessed value, which is then multiplied by local mill levies. Because overlapping local mill levies (county, city, school, and special districts) vary significantly down to the neighborhood level, this calculator bypasses mill levy math to provide a historically accurate effective rate estimate.
What this calculator does not account for:
- Exact local mill levies for your specific address, especially those from small localized special districts (water, fire, sanitation).
- The temporary $55,000 actual value exemption for tax year 2024 (you may manually deduct $55,000 from your home value in the calculator to simulate this).
- The upcoming 2025 bifurcated rate structure (different rates for school vs. non-school taxes).
- Temporary mill levy credits issued by local districts to comply with TABOR revenue limits.
How to get an accurate estimate:
- Look up your property’s precise “Actual Value” and total “Mill Levy” on your County Assessor’s online property record search.
- Check with the Division of Property Taxation to confirm the statutory assessment rate for the current tax year.
- If you are over 65 and have lived in your home for 10 years, file for the Senior Property Tax Exemption with your County Assessor by July 15.
Data sources: Statewide effective rate and county effective rates derived from U.S. Census Bureau ACS 2023. Legislative data (SB24-233, HB24B-1001) from the Colorado General Assembly. Exemption and TABOR details from the Colorado Division of Property Taxation.
Return to the National Property Tax Calculator to compare Colorado with other states.