How Paycheck Taxes Work in Colorado
How paycheck taxes work in Colorado: Your employer withholds federal income tax based on your W-4, then Colorado state income tax using state withholding tables. Social Security (6.2%) and Medicare (1.45%) are also deducted from each paycheck. Colorado's flat tax approach ensures that all taxpayers, regardless of income level, are taxed at the same marginal rate. To determine taxable income, the state allows for a standard deduction that is typically tied to the federal amount. This simplicity makes it easier for residents to predict their take-home pay, though overall tax burdens can still vary based on individual federal deductions and credits.
Colorado State Tax Information
Colorado utilizes a flat state income tax system, applying a consistent 4.4% rate to all taxable income for the 2026 tax year.
Colorado's flat tax approach ensures that all taxpayers, regardless of income level, are taxed at the same marginal rate. To determine taxable income, the state allows for a standard deduction that is typically tied to the federal amount. This simplicity makes it easier for residents to predict their take-home pay, though overall tax burdens can still vary based on individual federal deductions and credits.
Colorado is a better state to model carefully when you are comparing job offers, relocations, or remote-work options because state withholding can materially change annual take-home pay.
Federal Income Tax
Federal income tax uses progressive brackets: higher income is taxed at higher rates, not all at one rate. The standard deduction reduces taxable income before brackets apply, and your W-4 affects how much is withheld through the year.
Social Security
Social Security tax (FICA) is 6.2% of wages up to the annual wage base ($184,500 in 2026). Both employee and employer pay this amount; this calculator shows the employee portion.
Medicare
Medicare tax is 1.45% on all wages with no cap. High earners pay an additional 0.9% on wages above $200,000 (single) or $250,000 (married filing jointly).