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.

Most-used calculators

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.

Find your calculator

Grouped by who tends to use each tool. Many calculators serve more than one audience.

For unit owners

Verify a notice, check a fine, or understand the lien exposure on a delinquent account before acting.

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.

100+

Calculators live

Across statute, regulation, and policy

100%

Statute-cited

Every formula links its source

4,000+

Unit tests

Every formula has a regression suite

Open

Formula transparency

Deterministic math, no hidden weights

Free

Ad-supported

No paid tier, no paywall

How these calculators are maintained

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.

Read the editorial methodology →