Paid a W-2 salary instead? Try our Colorado paycheck calculator →
Colorado Paycheck Calculator FAQ
What is Colorado's state income tax rate?
Colorado charges a flat 4.40% rate for tax year 2026. Standard deduction: $16,100 for single filers.
How much is take-home pay on $65,000 in Colorado?
On a $65,000 gross salary, a single filer in Colorado takes home roughly $52,255.9/year (about $4,354.66/month) after federal tax, FICA, and state tax.
What deductions does Colorado apply before taxing my income?
Colorado applies a $16,100 standard deduction, before the flat 4.40% rate. See the "How Colorado Paycheck Tax Is Calculated" section above for the exact formula.
Does this estimate change if I'm married or have dependents?
This calculator uses single-filer figures only (v1 scope). Married filing jointly typically uses different federal and Colorado state brackets and a larger standard deduction — your actual take-home pay will differ. Dependents can also reduce federal withholding via the W-4. Check Colorado Department of Revenue's married-filing-jointly tables for a precise figure.
Methodology & Source
Colorado state tax figures sourced from Colorado Department of Revenue (https://tax.colorado.gov/), citing Colo. Const. art. X (flat rate mandate) — 4.4% per Proposition 121 (2022). Federal brackets, standard deductions (single/MFJ/HoH), and FICA constants sourced from the IRS (Revenue Procedure 2025-32; married-filing-jointly Additional Medicare threshold of $250,000 is a separate, unindexed statutory figure). Colorado's married-filing-jointly and head-of-household figures are not yet independently verified and currently fall back to single-filer brackets — see the caveat in the formula section above.
Self-employment tax uses the statutory 15.3% rate (12.4% Social Security + 2.9% Medicare) on 92.35% of net self-employment income, with half of the SE tax deducted from federal taxable income above-the-line — per IRS Schedule SE (Form 1040) instructions, IRC §1401 and §164(f), 2026 edition. The 20% Qualified Business Income deduction (IRC §199A) is not modeled — it phases out by income and business type and is too state/entity-dependent to compute generically. This assumes the self-employment income is your only earnings for the year; if you also have W-2 wages, the Social Security wage-base cap and Additional Medicare threshold are actually based on your combined earnings, so this will overstate SE tax if you have significant wage income too.
This is an estimate based on standard single-filer federal, FICA, and CO state calculations. Actual withholding may differ based on your W-4 elections, pre-tax deductions, and other factors. Colorado starts from federal taxable income; this estimate applies the federal standard deduction as the base. Colorado's TABOR mechanism can temporarily lower the effective rate in high-revenue years, not modeled here.
Guideline version: 2026-CO-v1 · Effective: 2022-01-01 · Last verified: 2026-07-26