Colorado charges 4.4% flat state income tax. Use the w-4 withholding calculator pre-loaded with Colorado rates.
Open W-4 Withholding Calculator →Getting your W-4 right in Colorado is important because you need to coordinate federal withholding with Colorado's flat 4.4% state withholding. If your W-4 is set too conservatively, you lend the government an interest-free loan; too aggressively, and you face an underpayment penalty. This calculator helps you dial in the right federal withholding amount given your Colorado state tax situation.
Colorado levies a flat 4.4% state income tax on all taxable income regardless of how much you earn. This makes tax planning straightforward: for every additional dollar you earn, 4.4 cents goes to Colorado. Colorado does not impose local income taxes, so the 4.4% flat rate is the only state-level income tax you owe.
The table below shows what you actually keep at five salary levels in Colorado, accounting for federal tax, FICA, and Colorado's flat 4.4% state tax.
See how Colorado compares to other West states. Each link takes you to the w-4 withholding calculator landing page for that state.
For a comprehensive breakdown of Colorado’s tax structure, salary comparisons, cost-of-living analysis, and more, visit the full Colorado take-home pay page.