How much tax do independent contractors pay? On net profit, expect 15.3% in self-employment tax plus federal income tax at bracket rates between 10% and 37%, and state income tax on top in most states. The combined effective rate commonly lands around 30% or more once both federal pieces are added, before state tax. The exact figure depends on your profit, your filing status, and the deductions you qualify for.
The 15.3% Self-Employment Tax
Self-employment tax is the piece most new contractors underestimate. It funds Social Security and Medicare, and under 26 U.S.C. ยง 1401 it runs 12.4% for Social Security plus 2.9% for Medicare, totaling 15.3%.1Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax In a W-2 job the employer covers half. On your own, you cover both halves.
The 12.4% Social Security portion only applies to the first $184,500 of net self-employment income in 2026.2Social Security Administration. Contribution and Benefit Base Anything above that cap escapes the Social Security piece. The 2.9% Medicare portion has no ceiling and applies to every dollar of net earnings.
You don’t apply the 15.3% to your full Schedule C profit. The IRS first reduces net earnings by 7.65%, so the rate hits 92.35% of profit. On $100,000 of net profit, the self-employment tax base is $92,350 and the tax is about $14,130. Half of what you pay then comes back as an above-the-line deduction that reduces your income tax, whether or not you itemize.3Office of the Law Revision Counsel. 26 USC 164 – Taxes In that example, roughly $7,065 comes off taxable income.
Higher earners pay more. If your net self-employment income exceeds $200,000 single or $250,000 married filing jointly, you owe an additional 0.9% Medicare surtax on the amount above the threshold, pushing the Medicare rate to 3.8% on that top slice.4Internal Revenue Service. Topic No. 560, Additional Medicare Tax Those thresholds are not indexed for inflation.
Federal Income Tax Comes on Top
Self-employment tax is separate from income tax. You owe both. Federal income tax is progressive: each slice of taxable income is taxed at a higher rate. The 2026 brackets for single filers are 10% up to $12,400, 12% to $50,400, 22% to $105,700, 24% to $201,775, 32% to $256,225, 35% to $640,600, and 37% above that.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Married filing jointly brackets are roughly double at the lower end, with the 10% band covering income up to $24,800 and the top 37% band starting at $768,701.
The number these rates hit is not your gross receipts. It’s your net profit, further reduced by the standard deduction ($16,100 single, $32,200 joint in 2026) or itemized deductions, half of your self-employment tax, self-employed health insurance premiums if eligible, and the qualified business income deduction. A contractor who collects $120,000 with $30,000 of real expenses starts income tax math at $90,000 of profit, then subtracts from there.
State Income Tax
Most states tax self-employment income too. Rates run from zero in states with no income tax to over 13% in the highest-tax states, with most using progressive brackets and a few applying a single flat rate. If you live and work in a state that taxes income, build the state bill into whatever you set aside for taxes alongside the federal pieces.
The 20% QBI Deduction
Section 199A lets eligible self-employed individuals deduct up to 20% of qualified business income before income tax is calculated.6Internal Revenue Service. Qualified Business Income Deduction The One Big Beautiful Bill Act signed in July 2025 made the deduction permanent.
If your taxable income stays below $201,750 single or $403,500 joint in 2026, the deduction is generally available without restriction. Above those thresholds, limitations phase in based on your line of work, the wages your business pays, and the depreciable property it holds. Service-based fields including law, accounting, consulting, and health care face the strictest rules, with the deduction phasing out entirely at $276,750 single or $553,500 joint. For a contractor with $80,000 of net profit who gets the full 20%, that’s $16,000 off taxable income. QBI reduces income tax only. It doesn’t touch self-employment tax.
Deductions That Shrink the Bill
Every legitimate business expense drops your net profit, and because self-employment tax and income tax both ride on net profit, each deductible dollar saves tax twice.
Day-to-day costs like supplies, software, business insurance, professional development, and travel for client work are reported on Schedule C and come straight off net profit.7Internal Revenue Service. Instructions for Schedule C (Form 1040) (2025) Equipment and computers can often be expensed in full the year you put them in service under Section 179, which allows up to $2,560,000 in immediate deduction for 2026, phasing out once total equipment purchases exceed $4,090,000. The property must be used more than 50% for business.
A home office qualifies if you use part of your home exclusively and regularly as your primary place of business. You can use the simplified method, $5 per square foot up to 300 square feet, or deduct the actual share of rent or mortgage, utilities, and insurance based on the percentage of your home used for work.
Self-employed health insurance works a little differently. If you pay your own premiums and aren’t eligible for coverage through a spouse’s employer plan, you can deduct 100% of premiums for yourself, your spouse, and dependents.8Internal Revenue Service. Instructions for Form 7206 It’s an above-the-line deduction rather than a Schedule C expense, so it cuts income tax but not self-employment tax, and it cannot exceed your net profit.
Putting the Numbers Together
The calculation runs through several forms. The logic is cleaner than the paperwork suggests.
Start with gross income. Every client that paid you $600 or more should send a 1099-NEC, but income under $600 is still taxable even without a form.9Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025) Report income and subtract business expenses on Schedule C to get net profit.7Internal Revenue Service. Instructions for Schedule C (Form 1040) (2025)
Multiply net profit by 92.35%, apply 15.3% (with the 12.4% Social Security portion stopping at $184,500), and that’s your self-employment tax. For income tax, start again from net profit, subtract half of the self-employment tax, subtract self-employed health insurance if eligible, subtract the standard or itemized deduction, then subtract the QBI deduction. Apply the brackets to what’s left. Add the two taxes together for the federal total, then add state tax.
Quarterly Estimated Payments
No one withholds for you, so the IRS wants payment as the money comes in. For 2026 the four deadlines are April 15, 2026; June 15, 2026; September 15, 2026; and January 15, 2027.10Internal Revenue Service. 2026 Form 1040-ES – Estimated Tax for Individuals Project your income, deductions, and credits using the Form 1040-ES worksheet, then split the estimated bill into four installments. If your income is uneven, the annualized income installment method lets you pay less in slower quarters.
Underpay and the IRS charges interest on the shortfall. The rate was 7% per year, compounded daily, as of early 2026.11Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026 You can avoid the underpayment penalty entirely by hitting one of two safe harbors: pay at least 90% of your current-year tax liability through estimates, or pay at least 100% of your prior-year tax (110% if last year’s adjusted gross income exceeded $150,000).12Internal Revenue Service. Estimated Tax The prior-year method gives contractors with swinging income a fixed target.
Filing late is worse than paying late. The failure-to-file penalty is 5% of unpaid tax per month, capping at 25%, with a minimum of the lesser of $525 or 100% of the tax owed once a return is more than 60 days late. Failure-to-pay runs 0.5% per month, also capping at 25%.13Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest Charges They stack. If you can’t pay, file anyway. If you’ve had a clean compliance record for the prior three years, First Time Abate can erase a failure-to-file or failure-to-pay penalty in full.14Internal Revenue Service. Administrative Penalty Relief
A Note on Classification
All of the above assumes you really are an independent contractor. If the IRS looks at how you work and decides you’re actually an employee, the tax picture changes: the self-employment tax goes away because your client should have been paying the employer half of payroll tax, and most of the deductions here are off the table. The IRS weighs behavioral control (does the company dictate how, when, and where you work), financial control (do you provide your own tools, bear your own expenses, and have the chance to profit or lose), and the nature of the relationship (written contracts, benefits, expected duration).15Internal Revenue Service. Independent Contractor (Self-Employed) or Employee? Working exclusively for one client, on their equipment, on their schedule, with no contractor agreement raises the reclassification risk no matter what your pay stub says.