Colorado Commercial Property Tax, in Numbers

Assessment ratios (share of actual value that is taxed)

Commercial-classed improved property (offices, retail, lodging, warehouse): 27% (2025) → 25% (2026); 2024 ran 26.4%–27.9% by subclass (offices at 26.4%), with a temporary $30,000 actual-value reduction on several commercial classes. Industrial-classed improved property (manufacturing, processing, refining), vacant land, and business personal property: 26% (2026), meaning equipment now assesses a point above commercial-classed buildings and at parity with industrial-classed plants. Residential: 6.8% for local-government levies (after statutory relief of 10% of the first $700,000 of value) and 7.05% for school levies, which get no such relief (2026). Ratios are statewide, set per tax year, which makes the ratio itself a classification check: assessed ÷ actual on your notice tells you what the county thinks your property is. The bill follows one formula: tax = actual value × assessment ratio × mill levy; at a representative 90-mill levy, a 2026 commercial building pays an effective ~2.25% of actual value.

The calendar

Colorado revalues every two years. For the 2027 reassessment: values are set as of the June 30, 2026 level-of-value data date; notices of valuation mail May 1, 2027; real-property protests are due June 1, 2027 (SB26-046, effective with the 2027 cycle). Business personal property runs its own lane every year: declarations April 15, notices June 15, protests June 30 (July 15 and July 31 from 2027 in counties using the alternate protest procedure, the nine over 300,000 in a reappraisal year), exemption $56,000 per county through 2026 and a flat $58,000 from 2027 (SB26-116). Abatements reach back two years; tax year 2024 closes permanently January 1, 2027. Full table: appeal deadlines.

What commercial property is worth on the rolls

What happens when owners appeal

From the state Board of Assessment Appeals public docket, all 8,058 commercial cases for tax year 2023: 61% settled by stipulation (the county agreed to a reduction), 37% were withdrawn, 1.4% were dismissed or closed without an order, and 0.7% (55 cases) were decided on the merits; of those 55, eight (one in a thousand filings) ended in a raised value. Across eight Front Range counties in 2025, decided-petition success rates ran from 6% (Adams) to 44% (Larimer), and in Douglas County owners who argued their hearings won 68% while waived hearings won nothing at the county level. Sources: the BAA analysis and the 2025 county results.

Business personal property, concentrated

Across 11 counties' public rolls (El Paso absent and two counties partial, so these are floors), the 1,384 largest BPP accounts (≈$500K+ assessed) carry an estimated $354 million in annual tax; 442 accounts pay an estimated $150,000+ each. Full analysis: Who Actually Pays Colorado's BPP Tax.