1099 Contractor Tax Calculator (2026)

Worked example

How it is calculated, step by step

1. Net profit = Total 1099 income minus deductible business expenses. If net profit is under $400 you owe no SE tax, but income tax can still apply.
2. Net earnings from self-employment = net profit x 0.9235 (this removes the employer-equivalent share, the net_earnings_factor).
3. Social Security portion of SE tax = 12.4% on net earnings, but only up to the $184,500 wage base for 2026, and that cap is reduced first by any W-2 wages already subject to Social Security.
4. Medicare portion of SE tax = 2.9% on all net earnings (no cap). Combined, SE tax is 15.3% up to the wage base and 2.9% above it.
5. Additional Medicare Tax = 0.9% on combined wages and SE net earnings above your filing-status threshold ($200,000 single and HoH, $250,000 joint, $125,000 MFS). Add this to SE tax; note its deductible half rule does not apply.
6. Deductible half of SE tax = 50% of the regular SE tax (the 15.3% part, excluding Additional Medicare Tax). This is an above-the-line deduction.
7. Adjusted gross income (from this business) = net profit minus the deductible half of SE tax, plus any other taxable income entered.
8. QBI deduction (if claimed) = 20% of QBI, where QBI = net profit minus the deductible half of SE tax; but capped at 20% of (taxable income before QBI deduction minus net capital gain). Most contractors get the full 20% in 2026; above the phase-in thresholds, wage and property limits apply.
9. Taxable income = AGI minus your 2026 standard deduction ($16,100 single, $32,200 joint, $24,150 HoH) minus the QBI deduction.
10. Federal income tax = apply the 2026 bracket schedule for your filing status to taxable income.
11. Total federal tax = SE tax + Additional Medicare Tax + federal income tax. This is the amount 1099 income creates that no employer withheld.
12. Set-aside rate = total federal tax divided by net profit. Quarterly estimated payment = total annual tax divided by 4, sent with Form 1040-ES by 4/15/26, 6/15/26, 9/15/26 and 1/15/27. To avoid penalties, pay at least the safe-harbor amount: 90% of this year's tax or 100% of last year's (110% if 2025 AGI exceeded $150,000).

Why 1099 taxes hit harder than a W-2 paycheck

A W-2 employee never sees the full cost of their taxes. The employer withholds federal income tax every payday and quietly pays half of Social Security and Medicare (7.65%) on the worker's behalf. When you are paid on a Form 1099-NEC or 1099-K, none of that happens. The client sends you the gross amount, and you are now both the worker and the employer for tax purposes.

That has two consequences this calculator makes visible. First, you owe self-employment tax of 15.3% on 92.35% of your net profit, covering both halves of Social Security (12.4% up to the $184,500 wage base for 2026, up from $176,100 in 2025) and Medicare (2.9% with no cap). Second, because nothing was withheld, you must set money aside yourself and send it to the IRS. The dollars in your bank account are not all yours. On typical contractor profit, roughly 20% to 30% belongs to federal tax before any state tax. Treating the whole deposit as income is the single most common way 1099 workers end up with a bill they cannot pay in April.

The three federal taxes stacked on your 1099 income

Your 1099 profit can trigger up to three separate federal taxes, and this tool adds them in the right order:

• Self-employment (SE) tax: 15.3% on net earnings (net profit × 0.9235). The 12.4% Social Security slice stops at $184,500 of combined wages and self-employment earnings; the 2.9% Medicare slice never stops.
• Federal income tax: the ordinary 2026 brackets (10% to 37%) applied to your taxable income after the standard deduction and QBI. A helpful offset: half of your SE tax is deductible above the line, lowering the income that gets taxed.
• Additional Medicare Tax: an extra 0.9% once combined wages plus SE earnings pass $200,000 (single), $250,000 (joint) or $125,000 (married filing separately).

The order matters because the deductible half of SE tax reduces adjusted gross income, which in turn lowers both income tax and the QBI base. Many generic calculators apply one flat rate to gross pay and miss this stack entirely, overstating or understating what a contractor actually owes.

The 20% QBI deduction for 1099 contractors

The Qualified Business Income (QBI) deduction is one of the biggest breaks available to 1099 workers, and it is easy to overlook because it never appears on a W-2. It lets most sole proprietors and single-member LLCs deduct up to 20% of their business profit before income tax is calculated. It does not reduce self-employment tax, only income tax.

For 2026 the full 20% is available for the large majority of contractors, whose taxable income sits comfortably below the phase-in thresholds that begin in the low six figures. One subtlety this calculator handles: your QBI base is net profit minus the deductible half of SE tax (and minus self-employed health insurance and retirement contributions if you have them), and the deduction is also capped at 20% of your taxable income before the deduction. Above the thresholds the rules add wage and property limits and phase out certain "specified service" trades such as consulting, health and law, which is where Form 8995-A and professional advice come in.

Quarterly estimated taxes and the set-aside rule

Because no employer is withholding for you, the IRS expects you to prepay your own tax four times a year using Form 1040-ES. For 2026 income the deadlines are April 15, 2026; June 15, 2026; September 15, 2026; and January 15, 2027. Miss them and the IRS charges an underpayment penalty even if you pay in full by April.

You avoid the penalty by meeting a safe harbor: pay at least 90% of your current-year tax, or 100% of last year's total tax (110% if your 2025 AGI was over $150,000), whichever is smaller. The practical habit is to open a separate savings account and move your set-aside percentage out of every client payment the day it lands. This calculator gives you that percentage and a per-quarter dollar figure, so instead of guessing you park, for example, 25% of each invoice and send a known amount each quarter. Remember that most states levy their own income tax on the same profit, so add your state rate on top of the federal figure shown here.

Frequently asked questions