Colorado Income Tax Rates 2025
Colorado has a flat income tax rate of 4.4% on all taxable income. The Colorado Constitution requires a single flat rate, and voter-approved measures have gradually reduced the rate over time.
Tax Type
Flat
Rate Range
4.4% flat
Brackets
1
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Colorado is only part of the equation — federal taxes apply too.
State Tax Ranking
At $75,000 income (single filer), Colorado ranks #24 out of 51 states — where #1 is the lowest tax burden.
Best states to move to from Colorado →Tax at Different Income Levels
| Income | State Tax | Effective Rate | Take-Home |
|---|---|---|---|
| $50,000 | $1,507 | 3.01% | $44,618 |
| $75,000 | $2,607 | 3.48% | $64,438 |
| $100,000 | $3,707 | 3.71% | $82,838 |
| $150,000 | $5,907 | 3.94% | $119,026 |
| $200,000 | $8,107 | 4.05% | $154,826 |
Single filer, standard deduction, 2025 tax year. Take-home is after federal + state income tax (excludes FICA).
Tax Overview
Colorado has a flat income tax rate of 4.4% for 2025. Colorado's TABOR amendment limits government revenue growth, resulting in periodic taxpayer refunds that can temporarily lower the rate when revenue exceeds limits. The state offers a generous standard deduction matching the federal amount.
Tax Planning Tip
Colorado's flat rate has been gradually declining through TABOR-related adjustments. The state standard deduction matches the federal one, keeping effective rates low. TABOR refunds provide an additional tax benefit in years when state revenue exceeds limits.
With a flat tax, your Colorado state income tax is simply 4.4% of your Colorado taxable income. Colorado uses federal taxable income as its starting point, then applies state-specific additions and subtractions. This makes filing relatively straightforward for most taxpayers. Colorado fully exempts Social Security benefits from state income tax for taxpayers aged 65 and older, and provides a partial exemption for those aged 55–64. The state sales tax rate is 2.9%, though local rates raise the combined rate well above that.
Property Tax & Cost of Living
Property tax rate is the state average effective rate. Actual rates vary by county. COL index from BEA Regional Price Parities by state (2024, all items; national average = 100).
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Frequently asked questions
What is Colorado's income tax rate in 2025?
Colorado has a flat income tax rate of 4.4% on all taxable income, regardless of how much you earn.
Does Colorado tax Social Security benefits?
Colorado fully exempts Social Security benefits from state income tax for taxpayers aged 65 and older, and provides a partial exemption for those aged 55 to 64.
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