Colorado State Tax Calculator 2026
Estimate your Colorado state income tax and take-home pay for tax year 2026.
Last updated: November 2025 · Source
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Colorado 2026 tax overview
Statutory flat 4.4% (TABOR may reduce to 4.25% in surplus years). Uses federal taxable income.
Breakdown
Frequently Asked Questions
What are the 2026 Colorado income tax rates?
Colorado has a flat 4.40% rate on taxable income. Statutory flat 4.4% (TABOR may reduce to 4.25% in surplus years). Uses federal taxable income.
What is the 2026 Colorado standard deduction?
Colorado conforms to the federal standard deduction ($16,100 single, $32,200 MFJ for 2026 per Rev. Proc. 2025-32).
Does Colorado tax Social Security benefits?
Tax treatment of Social Security varies by state. Colorado's rules can change year-to-year, check the Colorado Department of Revenue for the most current guidance.
What is the difference between federal and Colorado state income tax?
Federal tax is collected by the IRS at uniform rates nationwide (10%-37%). Colorado state tax is separate, with its own brackets and rules. Total income tax burden = federal + state combined.