Calculate your take-home pay in The Centennial State. Colorado income tax rate: 4.4%.
Colorado levies a flat 4.4% income tax on all taxable income for 2025. The state conforms to the federal standard deduction. Colorado taxable income starts with federal taxable income, making the calculation straightforward. The rate was temporarily reduced to 4.25% for 2024 but reverted to 4.4% for 2025.
| Item | Per Paycheck | Monthly | Annual |
|---|---|---|---|
| Gross Pay | - | - | - |
| Federal Income Tax | - | - | - |
| Colorado State Tax | $0 | $0 | $0 |
| Social Security | - | - | - |
| Medicare | - | - | - |
| 401(k) + Pre-Tax | - | - | - |
| Take-Home Pay | - | - | - |
Colorado has a flat income tax rate of 4.4%. This calculator estimates your take-home pay after federal income tax, state income tax, Social Security, Medicare, and any pre-tax deductions like 401(k) contributions. Enter your salary or hourly wage above to see a detailed breakdown of your paycheck.
Colorado uses a flat tax, meaning all taxable income is taxed at the same 4.4% rate regardless of how much you earn. The state starts with federal taxable income and makes limited adjustments, making the calculation straightforward. Colorado has a TABOR (Taxpayer's Bill of Rights) amendment that limits tax increases without voter approval and sometimes triggers taxpayer refunds when state revenue exceeds caps.
Regardless of state taxes, all Colorado workers pay federal income tax using the 2026 brackets: 10% on the first $11,925 of taxable income (single), 12% up to $48,475, 22% up to $103,350, 24% up to $197,300, 32% up to $250,525, 35% up to $626,350, and 37% on income above that. The standard deduction is $15,000 for single filers and $30,000 for married filing jointly in 2026.
All workers in Colorado pay Social Security tax at 6.2% on wages up to $176,100 (2026) and Medicare tax at 1.45% on all wages. An additional 0.9% Medicare surtax applies to wages over $200,000 for single filers. These federal payroll taxes apply uniformly regardless of which state you live in.
Pre-tax deductions reduce your taxable income for both federal and state purposes. Contributing to a 401(k) (up to $24,500 in 2026, plus $8,000 catch-up if 50+) lowers both your federal and CO state tax bill. Health Savings Account (HSA) contributions ($4,300 individual, $8,550 family in 2026) are also pre-tax. Review your W-4 withholding: if you receive a large refund each year, you may be overwithholding, which means less money in each paycheck. The Tax Bracket Calculator shows your federal marginal and effective rates.
Colorado's 4.4% flat income tax keeps the math simple. The Denver-Boulder corridor has become a major tech and aerospace hub, and the state consistently ranks among the top 10 for quality of life. Cost of living is above average, driven primarily by Front Range housing costs, but is still well below the Bay Area or New York metro.
Colorado's flat 4.4% rate is simple and predictable. The state has been gradually reducing its rate (from 4.63% in 2019) and may continue to cut. Denver and Boulder's strong tech and aerospace job markets command premium salaries, though housing costs in the Front Range have risen significantly.