Colorado Self-Employment Tax Calculator 2026
Estimate self-employment tax, federal and Colorado income tax and quarterly payments on LLC, sole proprietor and 1099 income in Colorado.
Total tax on your profit
$25,745
Pay about $6,436 each quarter in estimated tax · you keep $74,255
Self-employment tax
$14,130
Effective rate
25.7%
QBI deduction
$15,367
- Kept 74.3%
- SE tax 14.1%
- Federal 8.2%
- State 3.4%
| Quarter | Year | |
|---|---|---|
| Net business profit | $25,000.00 | $100,000 |
| Self-employment tax (15.3%) | −$3,532.39 | −$14,130 |
| Federal income tax | −$2,058.75 | −$8,235 |
| Colorado income tax | −$845.19 | −$3,381 |
| Left after tax | $18,563.68 | $74,255 |
Quick answer: With $100,000 of net profit in Colorado, a single business owner pays about $25,745 in total tax for 2026 (25.7%), including $14,130 of self-employment tax. Budget about $6,436 for each quarterly estimated payment.
Colorado self-employment tax by profit (2026)
| Net profit | SE tax | Federal tax | CO tax | Total tax | Effective rate | Per quarter |
|---|---|---|---|---|---|---|
| $25,000 | $3,532 | $571 | $314 | $4,417 | 17.7% | $1,104 |
| $50,000 | $7,065 | $2,667 | $1,336 | $11,068 | 22.1% | $2,767 |
| $75,000 | $10,597 | $4,898 | $2,358 | $17,853 | 23.8% | $4,463 |
| $100,000 | $14,130 | $8,235 | $3,381 | $25,745 | 25.7% | $6,436 |
| $150,000 | $21,194 | $16,413 | $5,425 | $43,033 | 28.7% | $10,758 |
| $200,000 | $28,234 | $25,196 | $7,470 | $60,901 | 30.5% | $15,225 |
| $300,000 | $31,606 | $60,643 | $11,812 | $104,061 | 34.7% | $26,015 |
| $500,000 | $38,625 | $131,787 | $20,494 | $190,905 | 38.2% | $47,726 |
Single filer, standard deduction, 20% QBI deduction (phased out for service businesses above $201,750), no other income.
How self-employment income is taxed
As a sole proprietor, independent contractor or single-member LLC owner, you pay three taxes on your net profit. Self-employment tax of 15.3% covers Social Security and Medicare, both the employee and employer halves. Federal income tax applies to profit after half of your SE tax, the standard deduction and the 20% qualified business income (QBI) deduction. Colorado income tax applies to the same profit: the state has a flat income tax of 4.4%. Single filers claim the federal standard deduction ($16,100).
Nobody withholds these taxes for you, so the IRS and Colorado expect quarterly estimated payments if you'll owe $1,000 or more for the year.
Denver and a few other cities charge a small flat monthly occupational privilege tax.
Colorado business taxes and fees beyond income tax
LLC fees: forming an LLC in Colorado costs $50. Ongoing: $25 periodic report.
Other business taxes: No franchise or gross receipts tax; some home-rule cities administer their own sales tax.
Read the full Colorado business tax guide or compare LLC fees in every state.
Colorado vs. nearby states: tax on $100,000 of profit
| State | State income tax | Total tax | Effective rate |
|---|---|---|---|
| Wyoming | None | $22,365 | 22.4% |
| New Mexico | $3,223 | $25,587 | 25.6% |
| Nebraska | $3,349 | $25,714 | 25.7% |
| Colorado | $3,381 | $25,745 | 25.7% |
| Oklahoma | $3,637 | $26,001 | 26% |
| Kansas | $4,386 | $26,751 | 26.8% |
Frequently Asked Questions
How much tax do I pay on $100,000 of self-employment income in Colorado?
A single sole proprietor or single-member LLC owner with $100,000 of profit in Colorado owes about $25,745 in 2026: $14,130 of self-employment tax, $8,235 of federal income tax and $3,381 of state income tax. That's 25.7% of profit, or about $6,436 a quarter in estimated payments.
How much should I set aside for taxes as a self-employed person in Colorado?
At $100,000 of profit, set aside about 30% of every payment you receive. At lower profits the share is smaller and at higher profits it's larger; use the table on this page to find your level.
What is the self-employment tax rate in Colorado?
Self-employment tax is federal, so it's the same in every state: 15.3% on 92.35% of your net profit, made up of 12.4% Social Security on the first $184,500 and 2.9% Medicare on everything. An extra 0.9% Medicare tax applies above $200,000 ($250,000 for married couples). You can deduct half of it from your income.
Does Colorado tax LLC income?
Yes. A single-member LLC's profit passes through to your Colorado personal return. Colorado has a flat income tax of 4.4%. LLC fees in Colorado: $25 periodic report.
When are quarterly estimated taxes due?
For 2026, federal estimated payments are due April 15, June 15 and September 15, 2026, and January 15, 2027. Most states with an income tax use the same dates. Paying at least 100% of last year's tax (110% if your income was over $150,000) avoids an underpayment penalty.
Would an S corporation lower my self-employment tax?
Possibly, once profit is high enough. An S corporation owner pays payroll tax only on a reasonable salary, not on the rest of the profit. Above roughly $60,000 to $80,000 of profit, the saving often covers the extra payroll and filing costs. Our guides to LLC and corporation taxes walk through the trade-offs.
Colorado Paycheck Calculator →
Take-home pay per paycheck after federal, state and payroll taxes.
Colorado Tax Brackets →
2026 income tax brackets, standard deductions and exemptions for single and married filers.
Colorado business tax guide →
Corporate tax, sales tax, LLC fees and more.
Self-employment tax calculators for other states
Sources
- https://www.irs.gov/pub/irs-drop/rp-25-32.pdf
- https://www.ssa.gov/oact/cola/cbb.html
- https://taxfoundation.org/data/all/state/state-income-tax-rates-2026/
- https://www.irs.gov/businesses/small-businesses-self-employed/self-employment-tax-social-security-and-medicare-taxes
- https://tax.colorado.gov/business-income-tax
- https://www.sos.state.co.us/pubs/business/fees.html
Estimates use 2026 federal and state rates and standard deductions, and assume no other income, itemized deductions or credits beyond those listed. Your employer's withholding may differ from your final tax bill. For informational purposes only; this is not tax advice.