Colorado Income Tax Rate
4.40% flat rate
Everyone pays 4.40% of taxable income, regardless of income level or filing status.
Key Facts That Affect Your Take-Home Pay
- Colorado uses a flat 4.4% income tax rate for all income levels and filing statuses: unlike federal taxes or states with graduated brackets, your Colorado tax percentage stays the same whether you earn $30,000 or $300,000. This flat rate is lower than Illinois's 4.95% but higher than most other flat-tax states, such as Pennsylvania (3.07%) and Indiana (2.95%).
- Colorado's flat tax rate means everyone pays the same 4.4% rate regardless of income level, creating a simple but potentially regressive system where lower earners pay a larger percentage of their take-home pay toward state tax than higher earners. However, the 4.4% rate is still lower than Illinois (4.95%) or Massachusetts (5.0%).
- Colorado does not collect income taxes from municipalities, ensuring the same tax rules apply statewide. All Coloradans have the same income tax burden: the flat 4.4% state rate.
What People Get Wrong
“Flat tax means low tax.”
Colorado's 4.4% flat rate is lower than Illinois (4.95%) and Massachusetts (5.0%), and comparable to or lower than many progressive states' effective rates for high earners. For someone earning $80,000, that 4.4% comes to $2,812 after the $16,100 standard deduction, which can be competitive with progressive states depending on income level. However, it's still not necessarily 'low' compared to states with zero income tax or lower flat rates like Pennsylvania (3.07%).
“No local taxes means Colorado is cheaper than other states.”
While Colorado avoids local income tax complications, the flat 4.4% rate combined with sales taxes (which vary by locality, with total rates ranging from 4% to 8.31%) and property taxes can still create a tax burden. A high earner in Colorado pays 4.4% income tax, while a high earner in a zero-tax state pays 0% income tax, though they may pay higher sales or property taxes. Factor in all taxes when comparing states.
“Everyone pays the same percentage, so it's fair.”
While everyone pays the same 4.4% rate in Colorado, the economic impact is different. The $832 a $35,000 earner pays (4.4% of what is left after the $16,100 standard deduction) is a larger share of disposable income than the $5,892 paid on $150,000. Flat taxes are proportionally equal, but not necessarily equitable in terms of real-world impact on people's financial lives: lower earners pay a larger percentage of their ability to cover necessities, while high earners benefit from not being pushed into higher brackets like they would be in progressive states.