Taxes in Fort Collins
Colorado charges a flat 4.4% state personal income tax for 2026 -- a real, structural difference from no-income-tax states like Texas, Tennessee, and Florida, and from Arizona's flat 2.5% rate -- alongside a combined sales tax rate in Fort Collins itself of 8.3% as of January 2026 (2.90% state + 1.05% Larimer County + 4.3499% City of Fort Collins), independently verified and distinct from Denver's or Boulder's own local rates.
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Learn moreColorado's Flat Income Tax -- Real, and Not Fully Fixed Year to Year
Colorado's flat state income tax rate is 4.4% for 2026, per the Colorado Department of Revenue and the base colorado.js state record. Unlike a simple flat-tax state, this rate is subject to a TABOR (Taxpayer's Bill of Rights) mechanism: when the state collects revenue above its constitutional cap in a given fiscal year, one refund mechanism is a temporary, across-the-board reduction in the income tax rate for that tax year. That mechanism reduced the rate to 4.25% for tax year 2024; it did not trigger for tax year 2025, so the rate reverted to 4.40%, and whether the tax-year-2026 rate stays at 4.40% or drops further depends on a state revenue determination not finalized until after the fiscal year closes.
Fort Collins's Own Combined Sales Tax Rate: 8.3% as of January 2026
Fort Collins's combined sales tax rate is 8.3% as of January 2026, per Avalara and TaxCloud rate-tracking, built from Colorado's 2.90% state base rate, a 1.05% Larimer County rate, and a 4.3499% City of Fort Collins local rate -- up from 8.05% after a Larimer County rate increase took effect. This is a real, independently verified Fort Collins-specific figure, not assumed to match Denver's or Boulder's own local add-ons -- Colorado's home-rule city system means each municipality genuinely can, and often does, set its own local sales tax rate.
Property Taxes (Summary -- See Full Topic Page)
Fort Collins's effective property tax rate is cited at 0.57% (Ownwell) -- genuinely low by national standards, though modestly above Colorado's own roughly 0.50% statewide average. A real, distinctive Larimer County Senior Property Tax Exemption is also available for long-time owners 65 and older. See the property-taxes topic page for the full breakdown; this summary intentionally does not repeat that detail.
No State Estate or Inheritance Tax
Colorado does not impose a state estate tax or inheritance tax -- only the federal estate tax applies, with a $13.61 million per-individual federal exemption for 2026 ($27.22 million for a married couple with proper planning), per multiple 2026 estate-planning aggregators reviewed this session. This is a genuine, if secondary, tax advantage relative to the small number of states that do impose their own estate or inheritance tax, though the federal exemption itself is scheduled to step down substantially without new legislation -- confirm current federal rules directly for any actual estate-planning decision.
Not a Uniformly Low-Tax State
Colorado's overall tax picture does not compress into a single "low-tax" label the way a no-income-tax state's might: the 4.4% flat income tax is a real, ongoing cost, and Fort Collins's own 8.3% combined sales tax rate runs above Georgia's cited ~7.4%-8.9% range and closer to Arizona's ~8.17%-8.4% average cited elsewhere in this project. Property taxes are the clearest tax-relief category for Fort Collins residents specifically -- see the property-taxes topic page.
Key takeaways
- Colorado's flat state income tax is 4.4% for 2026, but it is not fully fixed -- a TABOR mechanism can temporarily lower it in state revenue-surplus years (it dropped to 4.25% for tax year 2024).
- Fort Collins's own combined sales tax rate is 8.3% as of January 2026 (2.90% state + 1.05% Larimer County + 4.3499% city) -- independently verified, and not assumed to match Denver's or Boulder's own local rates.
- Property tax is the clearest tax-relief category: Fort Collins's cited 0.57% effective rate is far below the national average, though modestly above Colorado's own statewide average -- see the property-taxes topic page.
- Colorado levies no state estate or inheritance tax; only the federal estate tax applies (a $13.61M per-individual exemption for 2026) -- confirm current federal rules directly for estate planning.
- Colorado's overall tax profile is not uniformly low: the 4.4% income tax and Fort Collins's 8.3% combined sales tax are both real, ongoing costs, even as property taxes run genuinely favorable.
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