Rental Property Taxes in Colorado (2026 Guide)

1. Flat 4.4% State Income Tax

Colorado uses a flat income tax rate of 4.4% (reduced from 4.55% in 2024 via Proposition 121). This applies to all taxable income, including rental income, regardless of your total earnings. There are no brackets — a landlord making $50,000 in rental income pays the same rate as one making $500,000.

Key state tax details for landlords:

• Starts from federal taxable income — Colorado begins with your federal AGI and makes modifications, so federal Schedule E flows directly to your state return
• Bonus depreciation — Colorado conforms to federal bonus depreciation rules (no add-back required unlike NY or CA)
• Section 199A QBI — Colorado does not allow the federal 20% QBI deduction at the state level (it's a below-the-line deduction that doesn't reduce AGI)
• Capital gains — taxed at the same 4.4% flat rate (no preferential treatment)
• TABOR refunds — Colorado regularly refunds excess revenue to taxpayers, effectively reducing your effective tax rate in boom years

2. No Statewide Rent Control

Colorado state law (CRS 38-12-301) prohibits local governments from enacting rent control ordinances. This preemption has been challenged repeatedly (especially in Denver and Boulder) but remains in effect as of 2026.

What this means for Colorado landlords:

• Unlimited rent increases — you can raise rent by any amount with proper notice (21 days for month-to-month tenancies)
• Market-rate flexibility — adjust rents annually to match the rapid appreciation in Denver, Boulder, Colorado Springs, and Fort Collins metros
• No just-cause eviction — Colorado does not require a reason for non-renewal of a lease (though a 2024 bill introduced some protections for certain tenants)
• Income growth potential — Denver area rents have grown 5-8% annually over the past 5 years, allowing landlords to keep pace with property tax increases

3. Property Tax Reclassification

Colorado's property tax system uses different assessment rates for residential vs. commercial property, and recent reclassification has significantly impacted landlords:

• Residential assessment rate — 6.7% of actual value (reduced from 6.95% for 2025-2026 via Prop HH successor legislation)
• Commercial assessment rate — 29% of actual value
• Rental properties — single-family and small multifamily (1-4 units) are classified as residential. Larger multifamily and commercial are classified at the commercial rate.
• Mill levy — varies by taxing district (typically 70-110 mills), applied to assessed value

Example: A $500,000 residential rental property: $500,000 x 6.7% = $33,500 assessed value x 90 mills = $3,015/year in property taxes. The same value as commercial: $500,000 x 29% = $145,000 assessed x 90 mills = $13,050/year.

This massive difference makes the residential/commercial classification boundary critical. A 5-unit property crosses into commercial territory, quadrupling the effective property tax rate.

4. TABOR Amendment (Tax Limits)

The Taxpayer's Bill of Rights (TABOR), passed in 1992, is unique to Colorado and limits how much state and local governments can increase taxes and spending. For landlords, TABOR's effects include:

• Revenue limits — state revenue growth is capped at inflation + population growth. Excess revenue is refunded to taxpayers (you may receive TABOR refund checks)
• Property tax limits — local governments cannot raise mill levies without voter approval. This indirectly protects landlords from runaway property tax increases
• Assessment rate reductions — when property values surge (as they have in Colorado), the residential assessment rate is supposed to decrease to keep total revenue neutral. This is why the rate dropped from 9.5% (1980s) to 6.7% today
• De-Brucing — many local jurisdictions have voted to "de-Bruce" (waive TABOR limits), allowing them to keep excess revenue. Check your specific county/city

5. Local Rental Licensing Requirements

Many Colorado cities now require landlords to obtain rental licenses and pass periodic inspections. This is a growing trend that adds both cost and compliance burden:

• Denver — rental license required for all residential rentals. $50/unit annual fee. Inspections every 4 years (2025+, being phased in by neighborhood)
• Boulder — rental license required. $100/property + $50/unit. Mandatory inspection before license issuance and at renewal
• Aurora — Crime-Free Multi-Housing program registration for multifamily
• Fort Collins — Good Landlord Program (voluntary for fee reduction on occupancy violations)
• Colorado Springs — no rental license required (as of 2026)

Tax treatment: All rental license fees, inspection costs, and registration fees are deductible on Schedule E Line 17 (Other expenses). Track these carefully — they add up across a portfolio.

6. Colorado-Specific Deductions and Credits

Colorado offers some state-level benefits and has unique deduction considerations:

• Property tax deduction — Colorado property taxes (though relatively low) are fully deductible on federal Schedule E Line 16. No SALT cap applies to investment property
• Energy efficiency upgrades — Colorado offers state tax credits for energy-efficient improvements (solar panels, insulation, high-efficiency HVAC). These reduce your state tax liability and the underlying costs are still depreciable for federal purposes
• Wildfire mitigation — deductible as maintenance expense if required by county or insurance carrier. Colorado also has a $2,500 state tax subtraction for wildfire mitigation expenses on residential property
• Snow removal — Denver requires sidewalk clearing within 24 hours of snowfall (or face fines). Snow removal service costs are deductible as maintenance
• Radon mitigation — Colorado has elevated radon levels. Mitigation systems ($800-$2,500) are deductible as a repair/maintenance expense if installed in an existing rental

7. Colorado LLC Costs

Colorado is one of the most affordable states for LLC formation and maintenance:

• Formation fee — $50 (one of the lowest in the US)
• Annual report — $10 (due by the end of the anniversary month of formation)
• No franchise tax — no additional entity-level tax beyond the annual report
• No publication requirement — unlike New York, no newspaper publication needed
• Periodic report penalty — if you miss the annual report, the LLC is administratively dissolved after 2 months (can be reinstated for $50)

The $10 annual report fee is deductible on Schedule E. Colorado's low LLC costs make it practical to have separate LLCs for each property (better asset protection) without the $800/year penalty California imposes.

8. How SheltrIQ Helps CO Landlords

SheltrIQ simplifies Colorado rental property management and tax reporting:

• Flat tax simplicity — set your state to Colorado in Settings and SheltrIQ estimates your state income tax automatically at the flat 4.4% rate, no brackets to track (an estimate — consult a CPA for your return)
• Property reclassification tracking — alerts you when adding units might push a property from residential to commercial assessment rates
• Local license deadline alerts — tracks Denver, Boulder, and other city rental license renewal dates
• TABOR refund tracking — records refunds correctly (not as taxable income) in your financial records
• Energy credit optimization — identifies energy-efficient improvements that qualify for Colorado state tax credits
• AI classification — automatically categorizes Colorado-specific costs (radon mitigation, wildfire clearing, snow removal) to the correct Schedule E lines