Tools · Self-Employment Tax
Colorado 1099 Tax Calculator (2026)
Estimate what you owe on 1099 or self-employment income in Colorado for 2026. Enter your income and business expenses to see your self-employment tax, federal income tax, Colorado state income tax, and a rough quarterly payment.
Colorado self-employment tax calculator
- Net profit (income − expenses)
- $60,000
- Self-employment tax (15.3%)
- −$8,478
- Federal income tax
- −$4,511
- Colorado income tax
- −$1,932
- Total estimated tax
- $14,921
Colorado taxes self-employment profit as ordinary income. Colorado taxes income at a flat 4.40% for 2026. It has no state standard deduction of its own; taxable income starts from the federal amount, so the federal standard deduction effectively carries over.
Note on 2026 figures: The permanent rate is 4.40%. Under the TABOR surplus mechanism, a small temporary cut (to roughly 4.36%) is possible for 2026 if state revenue exceeds the cap, but that reduction is not certified until the surplus is finalized. The 4.40% permanent rate is used here.
Federal: IRS Revenue Procedure 2025-32 (IR-2025-103) · Social Security Administration. State: Colorado Department of Revenue.
Estimate for 2026. Self-employment tax is 15.3% on 92.35% of net profit (Social Security capped at the annual wage base); half of it is deducted before federal income tax. Excludes the qualified business income deduction, retirement contributions, health-insurance deduction, credits, and local taxes. This is a planning estimate for general information, not tax advice. Consult a tax professional before making quarterly payments.
How 1099 tax works in Colorado
Self-employed people pay self-employment tax: 15.3% (Social Security + Medicare) on 92.35% of net profit, with the Social Security portion capped at the annual wage base. Half of that SE tax is deductible before your federal income tax is figured on the rest. Colorado then taxes your profit as ordinary income. Colorado taxes income at a flat 4.40% for 2026. It has no state standard deduction of its own; taxable income starts from the federal amount, so the federal standard deduction effectively carries over.
Because no employer withholds for you, the IRS expects quarterly estimated payments. The calculator divides the annual total by four as a starting point. Your actual quarters can vary with income timing and credits.
This is a planning estimate, not your final return. It excludes the qualified business income deduction, retirement and health-insurance deductions, and credits. It is general information, not tax advice. Consult a tax professional before making quarterly payments. Federal figures: IRS Revenue Procedure 2025-32 (IR-2025-103) · Social Security Administration.
1099 tax calculators for other states
Same 2026 engine, each with its own state rules.