The federal tax rate for independent contractors generally lands between 25% and 50% of net earnings, and it comes from two stacked obligations. The first is a flat 15.3% self-employment tax that funds Social Security and Medicare. The second is federal income tax, applied through the same seven brackets that run from 10% to 37% for everyone else. State and local taxes sit on top of both. Because no employer withholds anything from your pay, you calculate and send these amounts yourself.
The 15.3% Self-Employment Tax
An employee splits Social Security and Medicare contributions with their employer. A contractor pays both halves. Federal law fixes the combined rate at 15.3%: 12.4% for Social Security and 2.9% for Medicare.1Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax
The rate does not apply to your gross receipts. You subtract business expenses from revenue to get net profit, then multiply that net profit by 92.35%. Only that reduced figure is subject to the 15.3%.2Internal Revenue Service. Topic No. 554, Self-Employment Tax The 7.65% haircut exists because employees never pay tax on the employer’s share of payroll contributions, and the adjustment puts contractors on comparable footing. On $100,000 of net profit, the taxable base is $92,350. You report the calculation on Schedule SE, attached to Form 1040.3Internal Revenue Service. About Schedule SE (Form 1040), Self-Employment Tax If net earnings from self-employment come in under $400 for the year, you owe no self-employment tax at all.
The Social Security Wage Cap
The 12.4% Social Security portion stops applying once your earnings pass an annual ceiling. For 2026, that ceiling is $184,500.4Social Security Administration. Contribution and Benefit Base Earnings above the cap still owe the 2.9% Medicare tax, but the Social Security piece falls away. The cap moves each year with the national average wage index.5Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet
The Extra 0.9% for High Earners
Medicare has no upper cap. Once self-employment income exceeds $200,000 for a single filer or $250,000 for a married couple filing jointly, an additional 0.9% Medicare surtax applies to the amount above the threshold, taking the Medicare rate on that top slice to 3.8%.6Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates You report it on Form 8959.
Deducting Half of What You Pay
You can deduct the employer-equivalent portion of self-employment tax, meaning half of the total, when calculating adjusted gross income.2Internal Revenue Service. Topic No. 554, Self-Employment Tax The deduction does not shrink the self-employment tax itself. It shrinks the income figure your federal income tax brackets run against. If your self-employment tax comes to $14,000, $7,000 comes off your AGI.
Federal Income Tax on Top
Your net business profit also runs through the ordinary federal income tax brackets. The system is progressive: each rate only applies to the slice of income that falls inside its range, not to the whole return.7Office of the Law Revision Counsel. 26 USC 1 – Tax Imposed
For 2026, single-filer brackets look like this:8Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
- 10% on income up to $12,400
- 12% on $12,401 to $50,400
- 22% on $50,401 to $105,700
- 24% on $105,701 to $201,775
- 32% on $201,776 to $256,225
- 35% on $256,226 to $640,600
- 37% on income above $640,600
Before the brackets apply, you subtract either the standard deduction or your itemized deductions, whichever is larger. The 2026 standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly.8Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 A single contractor with $80,000 in taxable income pays 10% on the first $12,400, 12% on the next $38,000, and 22% on the remaining $29,600. The effective rate ends up well below the 22% top-bracket figure.
This income tax runs separately from the 15.3% self-employment tax. Both apply to the same net profit.
The Qualified Business Income Deduction
Section 199A lets many self-employed people deduct up to 20% of their qualified business income from taxable income.9Internal Revenue Service. Qualified Business Income Deduction The deduction, once scheduled to expire after 2025, is now permanent. On $100,000 of qualifying income, that can pull $20,000 out of the income tax base entirely.
The full 20% is available to single filers with 2026 taxable income at or below $201,750, and to joint filers at or below $403,500. Above those points the deduction phases out based on income, the wages you pay, and the type of work you do, ending completely at $276,750 single and $553,500 joint.8Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Contractors in health care, law, accounting, consulting, financial services, and the performing arts hit tighter limits once they pass the phase-out thresholds, and income from those fields may not qualify at all above the cap. Below the threshold, the type of business does not matter.
Deductions That Shrink Both Taxes
Every legitimate business expense reduces both self-employment tax and income tax, because both run off the same net profit. The IRS allows expenses that are ordinary in your line of work and necessary for running your business, reported on Schedule C.10Internal Revenue Service. Tax Guide for Small Business (Publication 334) Common categories include home office costs, business mileage (72.5 cents per mile in 2026),11Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents per Mile equipment, and supplies. Self-employed health insurance premiums for you, your spouse, and dependents (including children under 27) are deductible on Form 7206 and Schedule 1 rather than Schedule C, and only for months you were not eligible for coverage through a spouse’s employer or another source.12Internal Revenue Service. Instructions for Form 7206
Paying Quarterly Instead of Waiting for April
The IRS expects contractors to pay as they earn, in four installments, using Form 1040-ES. Those payments cover both income tax and self-employment tax.13Internal Revenue Service. Estimated Taxes For 2026 income, the deadlines are:14Internal Revenue Service. Estimated Tax
- April 15, 2026, for January through March
- June 15, 2026, for April and May
- September 15, 2026, for June through August
- January 15, 2027, for September through December
To avoid an underpayment penalty, pay at least 90% of your current-year tax liability or 100% of the prior year’s tax, whichever is smaller. If your prior-year AGI exceeded $150,000, the safe harbor rises to 110% of the prior year’s tax.15Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty Missing the mark triggers interest-based charges, running at 7% annually as of early 2026.16Internal Revenue Service. Quarterly Interest Rates
State and Local Taxes
Where you live decides the final layer. Most states tax self-employment income, with rates roughly between 1% and 13% depending on the state and income level. Some use progressive brackets; others charge a flat rate; a handful have no income tax at all, though they may recover the revenue through other fees. Cities and counties can add another 1% to 4%, and in some places local business taxes hit gross receipts rather than net profit, so deductions do not reduce them. Confirm the current numbers with your state and local tax agency each year.
Putting the pieces together: a contractor with $80,000 in net profit often lands in an effective combined rate in the mid-20s once self-employment tax, income tax, the QBI deduction, and state and local taxes are all counted. A contractor clearing more than $250,000 can push toward or past 40%.