Colorado State Tax Guide (2026)
Single flat rate 4.40% (flat 4.40% for 2026; includes any scheduled temporary adjustments — verify against CO DOR).
Quick answer (Colorado, 2026)
Colorado uses a flat individual income tax with a flat rate of 4.4%. There is no local (city/county) income tax on top of the state rate. No state estate or inheritance tax applies. Source: Tax Foundation — State Individual Income Tax Rates and Brackets, 2026 (retrieved 2026-08-11).
Why it matters: State income tax is only part of the picture. Residency, sourcing of income, credits, and local taxes change the effective burden. Use the embedded estimator below for your own number, and check reciprocity and convenience-rule status before a move or remote-work arrangement.
This guide summarizes structural facts for planning. It is not a substitute for the official Colorado tax code or a licensed preparer.
Estimate your Colorado state income tax
Pre-filled for Colorado (CO). Enter your state taxable income and filing status to see the estimated state (and any local) tax, effective rate, and a printable breakdown.
Single flat rate 4.40% (flat 4.40% for 2026; includes any scheduled temporary adjustments — verify against CO DOR).
Not tax, legal, or financial advice
FiscTalk provides general educational information from public sources. Tax outcomes depend on your full facts, filing history, and jurisdiction-specific rules that change yearly. Before filing or making decisions, consult a licensed CPA, EA, or attorney. FiscTalk is not a fiduciary and is not affiliated with the IRS or any state agency.
Sources & methodology
Frequently asked questions
Not tax, legal, or financial advice
FiscTalk provides general educational information from public sources. Tax outcomes depend on your full facts, filing history, and jurisdiction-specific rules that change yearly. Before filing or making decisions, consult a licensed CPA, EA, or attorney. FiscTalk is not a fiduciary and is not affiliated with the IRS or any state agency.
Sources & methodology
All state tax guides
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