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Colorado 1099 Self-Employment Tax Calculator (2026 Rates)

Estimate your 2026 take-home pay as a Colorado freelancer or independent contractor, including self-employment tax, federal income tax and Colorado's a flat 4.4% income tax, plus your quarterly estimated payments.

Data as of November 2026

Income period
$
$

Deductible costs: software, equipment, home office, mileage, health insurance.

Filing status

Estimated take-home pay /yr

$67,712

$5,643 per month after all taxes

Self-employment tax

$12,717

15.3% on 92.35% of profit

Federal income tax

$6,599

22% marginal bracket

CO state tax

$2,972

4.40% marginal

Effective tax rate

24.8%

$22,288 total tax
Where your 2026 gross income goes
Take-home pay: $67,712Self-employment tax: $12,717Federal income tax: $6,599Colorado tax: $2,972Business expenses: $10,000
  • Take-home pay$67,71268%
  • Self-employment tax$12,71713%
  • Federal income tax$6,5997%
  • Colorado tax$2,9723%
  • Business expenses$10,00010%

Quarterly estimated payments (2026 tax year)

Due dateFederal (IRS)COTotal
Q1April 15, 2026$4,829$743$5,572
Q2June 15, 2026$4,829$743$5,572
Q3September 15, 2026$4,829$743$5,572
Q4January 15, 2027$4,829$743$5,572
Show calculation details
Net business profit
$90,000
Deductible half of SE tax
−$6,358
QBI deduction (Sec. 199A)
−$13,508
Federal taxable income
$54,033
Colorado taxable income
$67,542

Estimates only. Local and city income taxes are not included.

Colorado self-employment tax at a glance

Colorado starts from federal taxable income and applies a single flat rate. Under TABOR, the rate can be temporarily reduced in years with a state revenue surplus. Denver and a few other cities charge a small monthly Occupational Privilege Tax.

  • State income tax: a flat 4.4% income tax (top marginal rate 4.4%)
  • Standard deduction / exemption: $16,100 single, $32,200 married filing jointly
  • Estimated payments: Form DR 0104EP
  • Tax agency: Colorado Department of Revenue
  • Local income taxes: Yes, some cities or counties levy them (not included above)

How Colorado compares: take-home pay on 1099 income

The table compares a single filer with no business expenses in Colorado with the average state income tax across the15 states we cover and with a state that has no income tax. Every column includes self-employment tax and federal income tax.

Net profitColorado state taxAvg. state taxTotal taxColorado take-homeNo-income-tax state
$50,000$1,336$1,158$11,068 (22.1%)$38,932$40,268
$75,000$2,358$2,012$17,853 (23.8%)$57,147$59,505
$100,000$3,381$2,912$25,745 (25.7%)$74,255$77,635
$150,000$5,425$4,749$43,033 (28.7%)$106,967$112,392
$250,000$9,641$8,541$76,595 (30.6%)$173,405$183,046

2026 Colorado income tax brackets

Single rateSingle taxable incomeMarried rateMarried filing jointly
4.4%Over $04.4%Over $0

How this calculator works

  1. Net profit is your gross 1099 income minus deductible business expenses.
  2. Self-employment tax is 15.3% (12.4% Social Security up to the $184,500 wage base, plus 2.9% Medicare) on 92.35% of net profit.
  3. Federal income tax applies the 2026 brackets after subtracting half of your SE tax, the standard deduction and the 20% qualified business income (QBI) deduction.
  4. Colorado tax applies Colorado's brackets to your adjusted gross income after the state deduction or exemption.
  5. Quarterly payments divide the annual federal amount evenly.

Not included: credits, itemized deductions, retirement contributions (SEP-IRA, Solo 401(k)), self-employed health insurance deduction and local taxes. Each of these usually lowers the bill, so treat the result as a conservative upper estimate.

Frequently asked questions

How much should I set aside for 1099 taxes in Colorado?

A Colorado freelancer filing single with $100,000 of net profit owes roughly $25,745 in combined self-employment, federal and state income tax for 2026, an effective rate of about 25.7%. A practical rule of thumb is to move 30% of every client payment into a separate tax savings account, then fine-tune once you know your real deductible expenses.

What is the Colorado income tax rate for self-employed people?

Colorado has a flat 4.4% income tax. Self-employed people pay the same state rates as employees on their net business income; there is no separate state self-employment tax. On $100,000 of net profit, the Colorado portion comes to about $3,381.

When are Colorado quarterly estimated tax payments due?

Federal estimated payments for the 2026 tax year are due April 15, 2026, June 15, 2026, September 15, 2026 and January 15, 2027. Colorado estimated payments are made with Form DR 0104EP to the Colorado Department of Revenue and generally follow the same calendar.

Do Colorado freelancers pay self-employment tax on top of income tax?

Yes. Self-employment tax (15.3% for Social Security and Medicare, applied to 92.35% of net earnings) is a federal tax, so every 1099 earner pays it regardless of state. On $100,000 of net profit it is about $14,130. Half of it is deductible when calculating federal income tax, and the Social Security portion stops at the $184,500 wage base.

Why does my Colorado tax rate sometimes change mid-year?

The Taxpayer's Bill of Rights (TABOR) requires the state to refund revenue above a constitutional limit. One refund mechanism is a temporary cut to the income tax rate, which is often announced after the tax year has started.