Colorado Income Tax Calculator
Calculate your 2026 Colorado state income tax. See your bracket breakdown, effective rate, and how Colorado compares to neighboring states.
Your Tax Inputs
Effective Rate vs Neighboring States
Colorado Tax Brackets (2026)
Federal vs Colorado Tax Comparison
Estimate for your income and filing status. Federal uses 2026 brackets and standard deduction.
| Item | Federal | Colorado | Total |
|---|
About Colorado state taxes (Tax year 2026)
Colorado has a flat income tax rate of 4.4% on all taxable income. The state uses federal taxable income as the starting point, meaning Colorado conforms to federal standard deduction amounts.
Groceries are exempt from state sales tax. Prescription drugs are exempt.
Colorado's 4.4% flat rate is near the national average. Its low state sales tax rate of 2.9% is offset by relatively high local add-ons.
Filing in Colorado: returns for tax year 2026 are administered by the Colorado Department of Revenue and are generally filed in 2027 by the federal April deadline unless Colorado declares a state-specific extension. Tax type on this return: Flat. Top marginal rate: 4.4%. State sales-tax rate: 2.9%. For the most current contact info, see the Federation of Tax Administrators directory.
Colorado — What is Colorado's income tax rate? Colorado has a flat income tax rate of 4.4% applied to all taxable income. The state uses federal taxable income as its starting point.
Colorado — Does Colorado tax groceries? No, groceries are exempt from Colorado's 2.9% state sales tax. However, some local jurisdictions do tax groceries.
Colorado — Does Colorado have a TABOR refund? Yes, Colorado's Taxpayer's Bill of Rights (TABOR) limits government revenue growth. When revenue exceeds the limit, taxpayers receive refunds, which can be several hundred dollars per person.
How this page is reviewed
| Risk tier | High YMYL |
|---|---|
| Author | Calculover Editorial Team Tax education |
| Editorial owner | Calculover Tax & Payroll Desk State-tax methodology owner |
| Reviewer | Calculover Editorial Review Government-source and limitation review |
| Last reviewed | 2026-05-14 |
| Last verified | 2026-05-14 |
| Data effective date | 2026-01-01 |
| Jurisdiction | Colorado |
Methodology
State-tax per-state pages apply the published 2026 bracket schedule, standard deduction, and filing-status rules for the listed jurisdiction. Federal AGI inputs are mapped to state taxable income before bracket math runs. Local taxes (NYC, Philadelphia, certain Ohio cities) are flagged but not embedded in the base estimate.
Assumptions
- The user enters federal AGI, filing status, and state-specific adjustments as provided.
- Brackets, standard deductions, and credits reflect the 2026 statutory values published by the state Department of Revenue and the Tax Foundation.
- Local income taxes and reciprocity-agreement situations are noted but not auto-applied.
Limitations
- These pages do not predict mid-year legislative changes, rate adjustments, or new local tax assessments.
- Multi-state filers, convenience-of-employer rules, and special-circumstance credits require additional tax-professional analysis.
Sources
- State Tax Rates, Federation of Tax Administrators
- State Individual Income Tax Rates and Brackets, Tax Foundation
- State Government Resources, Internal Revenue Service
Professional guidance: This page is for state-tax education only and is not tax, legal, financial, or investment advice. State tax decisions and multi-state filing should be reviewed with a CPA or enrolled agent licensed in the relevant states.