Colo. Const. Art. X § 3

Colorado Real Estate Calculators

Colorado's split residential/commercial assessment ratio (post-Gallagher repeal), § 39-3-203 senior homestead exemption (50% of first $200K for age 65+ owning 10+ years), and the TABOR / Prop HH legislative whiplash.

Anchored to: Colo. Const. Art. X §§ 3, 20; § 39-1-104.2; § 39-3-203

1 calculator live. Reviewed against current statute and regulation. Last updated 2026-05-16.

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Colorado Constitution Article X § 3 (uniform taxation

Colorado Property Tax Calculator

Compute a Colorado property's annual tax bill under Article X § 3 of the Colorado Constitution and C.R.S. § 39-1-104.2. Models the post-Gallagher residential assessment ratio (estimated 6.4% for tax year 2026 following SB22-238 / SB23-303 / 2024 special-session adjustments), the statutory 29% commercial/industrial ratio, the 21% agricultural preferential-use ratio, and the C.R.S. § 39-3-203 senior property tax homestead exemption — 50% of the first $200,000 of actual value for owners age 65+ with 10+ years of continuous ownership, or for a 100% permanently and totally disabled veteran with no age or duration requirement.

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Colorado Property Tax Calculator
Compute a Colorado property's annual tax bill under Article X § 3 of the Colorado Constitution and C.R.S. § 39-1-104.2. Models the post-Gallagher residential assessment ratio (estimated 6.4% for tax year 2026 following SB22-238 / SB23-303 / 2024 special-session adjustments), the statutory 29% commercial/industrial ratio, the 21% agricultural preferential-use ratio, and the C.R.S. § 39-3-203 senior property tax homestead exemption — 50% of the first $200,000 of actual value for owners age 65+ with 10+ years of continuous ownership, or for a 100% permanently and totally disabled veteran with no age or duration requirement.

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Property Tax
Colorado Property Tax Calculator
Compute a Colorado property's annual tax bill under Article X § 3 of the Colorado Constitution and C.R.S. § 39-1-104.2. Models the post-Gallagher residential assessment ratio (estimated 6.4% for tax year 2026 following SB22-238 / SB23-303 / 2024 special-session adjustments), the statutory 29% commercial/industrial ratio, the 21% agricultural preferential-use ratio, and the C.R.S. § 39-3-203 senior property tax homestead exemption — 50% of the first $200,000 of actual value for owners age 65+ with 10+ years of continuous ownership, or for a 100% permanently and totally disabled veteran with no age or duration requirement.

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Every YMYL calculator is reviewed quarterly and after every legislative session in the jurisdiction it covers. Citations are link-validated monthly against the relevant statute and regulation websites. The methodology page documents the discipline.

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