COLORADO · 2026

Colorado paycheck at 4.40%.

Colorado’s flat income tax is 4.40% for 2026. The state’s standard deduction tracks the federal amounts. The rate box here does not subtract that deduction.

How this rate is applied

Colorado’s 2026 flat rate is 4.40%, and the standard deduction cited alongside it matches the federal $16,100 single and $32,200 joint figures. Our flat-rate line does not subtract that deduction. Treat it as higher than the state return, or reduce the wage you type by the deduction if you want a closer income-tax estimate. Local occupational taxes are not included.

Single filer, $100,000, nothing deferred

Federal income tax is about $13,170 after the $16,100 standard deduction. The state line at 4.40% of the full wage is $4,400, and it is high on purpose if the state lets you claim a deduction we did not subtract. Social Security is $6,200 and Medicare is $1,450. A rough net is $74,780 before health premiums.

Federal brackets are the same in every state. Read them on the 2026 bracket page if the federal line looks surprising. The marginal rate is not the effective rate.

Questions

What is Colorado's income tax rate in 2026?

The state rate used on this page is 4.40%. It is applied to wages after a traditional 401(k) and before that state's own deductions.

Does this include local tax?

Only if you add it to the rate yourself. The pre-filled number is the state rate.

Sources

Reading the Colorado result

Colorado’s 4.40% rate sits next to a standard deduction that tracks the federal $16,100 single and $32,200 joint figures. This flat line does not subtract that deduction. Treat the state dollars as higher than the state return, or reduce the wage yourself before comparing.

On the wage this page opens with, $100,000, a single filer with no 401(k) owes about $13,170 in federal income tax after the $16,100 standard deduction. Social Security is $6,200 and Medicare is $1,450. The state line at 4.40% of $100,000 is $4,400. It is high if the state lets you claim a deduction this flat box does not subtract. A rough net is $74,780 before health premiums. Biweekly, that net is about $2,876.

Use the main calculator when the wage is not the one printed here

This page fixes the state setting so the common mistake, typing a guessed rate, is harder. The brackets, the wage base, and the 401(k) treatment are the same engine as the US paycheck calculator. Change filing status on the form rather than multiplying the single result by two. Married filing jointly has its own standard deduction and its own brackets. A second job is not modeled. Local tax is not modeled except where the paragraph above tells you to add a county or city rate yourself.