If you get paid on a 1099, you pay taxes by calculating what you owe yourself, sending the IRS quarterly estimated payments during the year, and filing Form 1040 with Schedule C and Schedule SE after year-end. That’s the short answer to how a 1099 employee pays taxes. No one withholds anything from your checks, so the responsibility for two separate taxes — self-employment tax and federal income tax — falls entirely on you.
The IRS treats you as self-employed once a client pays you as a contractor rather than an employee, even if you only work for one company.1Internal Revenue Service. Independent Contractor Defined You owe tax on every dollar you earn from that work, whether or not a client actually sends you a 1099-NEC.
The Two Taxes You Owe
Your earnings get hit twice. First by self-employment tax, then by regular income tax. They’re calculated separately and both apply to the same net profit figure.
Self-Employment Tax
Self-employment tax is your Social Security and Medicare contribution. A W-2 employee splits this cost with their employer at 7.65 percent each. You pay both sides: 15.3 percent total, made up of 12.4 percent for Social Security and 2.9 percent for Medicare.2Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax
One quirk works in your favor. You don’t apply that 15.3 percent to your full net profit. You first multiply net earnings by 92.35 percent, then apply the rate to that smaller figure.3Internal Revenue Service. Topic No. 554, Self-Employment Tax The adjustment mirrors the deduction employers get for their share of payroll taxes.
The Social Security portion caps out. For 2026, the 12.4 percent piece only applies to the first $184,500 of self-employment earnings.4Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Anything above that avoids Social Security tax but still owes the 2.9 percent Medicare piece. High earners face an extra 0.9 percent Additional Medicare Tax once income passes $200,000 single or $250,000 married filing jointly.5Internal Revenue Service. Topic No. 560, Additional Medicare Tax
Federal Income Tax
Your net profit also goes into the regular income tax brackets, the same graduated rates every taxpayer uses. For a single filer in 2026:6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
- 10% up to $12,400
- 12% from $12,401 to $50,400
- 22% from $50,401 to $105,700
- 24% from $105,701 to $201,775
- 32% from $201,776 to $256,225
- 35% from $256,226 to $640,600
- 37% over $640,600
Each bracket only taxes the income inside its range, not your full earnings. And the rates apply to taxable income, meaning net profit minus your deductions.
Figuring Your Net Profit
Net profit is the single number that drives both taxes. It’s your gross receipts from clients minus your ordinary and necessary business expenses.7Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses You report the calculation on Schedule C, which attaches to your Form 1040.
Typical deductible expenses for contractors include:
- Business mileage at 72.5 cents per mile for 2026 if you use the standard rate8Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile
- A share of rent, utilities, and insurance for a home office used regularly and exclusively for business
- Equipment, software, tools, and supplies
- Fees paid to accountants, lawyers, or subcontractors
- Business insurance premiums
Larger purchases with a useful life beyond the current year, like a vehicle, generally get depreciated over several years rather than deducted all at once. Keep separate business accounts, save receipts, and log mileage as you go. The IRS generally expects you to retain records supporting deductions for at least three years after filing.9Internal Revenue Service. How Long Should I Keep Records
Deductions That Cut Your Tax Bill
Beyond Schedule C expenses, several deductions run through Schedule 1 of Form 1040, lowering your adjusted gross income directly.
Half of your self-employment tax. Deduct 50 percent of what you paid in SE tax on Schedule 1, line 15.3Internal Revenue Service. Topic No. 554, Self-Employment Tax Pay $10,000 in SE tax and you shave $5,000 off your income-taxable earnings. It doesn’t reduce the SE tax itself, only your income tax.
Qualified business income deduction. Section 199A lets eligible contractors deduct up to 20 percent of qualified business income.10Office of the Law Revision Counsel. 26 USC 199A – Qualified Business Income The One Big, Beautiful Bill Act signed in July 2025 made this permanent. It phases out at higher income levels, and service businesses like law, accounting, and consulting face extra limits once income crosses those thresholds.
Self-employed health insurance. If you buy your own health, dental, or vision coverage and aren’t eligible for a spouse’s employer plan, you can deduct the full premium cost for yourself, your spouse, and your dependents on Schedule 1, line 17.11Internal Revenue Service. Instructions for Form 7206 The deduction doesn’t apply for any month you were eligible for an employer-subsidized plan, even one you turned down.
Retirement contributions. A SEP-IRA lets you contribute up to 25 percent of net self-employment earnings, capped at $72,000 for 2026. A solo 401(k) reaches a similar ceiling and adds flexibility with both employee deferrals and employer-side contributions. Contributions reduce current taxable income.
Paying Quarterly Estimated Taxes
The IRS wants its money throughout the year, not in one April payment. You send four estimated payments using Form 1040-ES.12Internal Revenue Service. About Form 1040-ES, Estimated Tax for Individuals
How Much to Send
Form 1040-ES has a worksheet that walks you through projecting the year’s income, applying rates, and factoring deductions and credits.13Internal Revenue Service. Form 1040-ES – 2026 Divide the total by four. If your income is lopsided across the year, the annualized income installment method lets you size each payment to what you actually earned that quarter.
You can avoid an underpayment penalty by hitting any of these safe harbors:14Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
- Pay at least 90 percent of what you actually owe this year.
- Pay at least 100 percent of last year’s total tax.
- If last year’s AGI topped $150,000 ($75,000 if married filing separately), pay at least 110 percent of last year’s tax.
- Owe less than $1,000 after credits and any withholding.15Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax
Basing payments on last year’s number is the easiest path if your income swings. You already know the figure.
Due Dates
The quarterly periods aren’t evenly spaced:16Internal Revenue Service. Estimated Tax – Individuals
- April 15 for income earned January 1 through March 31
- June 15 for April 1 through May 31
- September 15 for June 1 through August 31
- January 15 of the following year for September 1 through December 31
Weekend or federal holiday dates push to the next business day.
Ways to Pay
IRS Direct Pay moves money from your checking or savings account for free and confirms immediately.17Internal Revenue Service. Direct Pay with Bank Account EFTPS takes a one-time enrollment and lets you schedule recurring payments with a stored history.18Internal Revenue Service. Direct Pay Help Credit or debit card payments go through third-party processors that charge roughly 1.75 to 2.95 percent for credit; the fee itself is deductible as a business expense.19Internal Revenue Service. Pay Your Taxes by Debit or Credit Card or Digital Wallet If you e-file through tax software, you can schedule all four quarterly withdrawals at once.20Internal Revenue Service. Pay Taxes by Electronic Funds Withdrawal Mailed checks go with the voucher from Form 1040-ES to processing centers in Charlotte or Louisville depending on where you live.21Internal Revenue Service. Where to File Addresses for Taxpayers and Tax Professionals Filing Form 1040-ES
Filing the Annual Return
After the tax year closes, Form 1040 pulls everything together with two attached schedules.22Internal Revenue Service. About Form 1040
Schedule C reports the year’s gross receipts and itemizes expenses to arrive at final net profit or loss. Schedule SE takes that net profit, applies the 92.35 percent multiplier and the 15.3 percent rate, and calculates your self-employment tax along with the deductible half.3Internal Revenue Service. Topic No. 554, Self-Employment Tax
Form 1040 compares your combined tax liability against the estimated payments you already made. Overpay and you get a refund or can roll the credit forward. Underpay and the balance is due by the April filing deadline.
Penalties If You Miss
Falling behind gets costly fast, and failure to file and failure to pay are separate penalties that can stack:
- Failure to file: 5 percent of unpaid tax per month or partial month, up to 25 percent.23Internal Revenue Service. Failure to File Penalty
- Failure to pay: 0.5 percent of unpaid tax per month, also capped at 25 percent.
- Underpayment of estimated tax: interest accrues daily at the federal short-term rate plus three points, sitting at 7 percent in early 2026.24Internal Revenue Service. Quarterly Interest Rates
When both file and pay penalties apply in the same month, the file penalty is reduced by the pay penalty, so the monthly hit is 5 percent rather than 5.5 percent. If you can’t afford the full balance, file on time anyway. That alone cuts your penalty exposure sharply.
State Taxes Are Separate
Federal taxes are only part of the picture. Most states with an income tax also require quarterly estimated payments on a similar schedule, with their own forms, rates, and thresholds. A few states have no income tax; others charge rates that add several points to your total. Some cities collect their own income or business taxes on top. Check your state’s department of revenue site early in the year for estimated payment rules and any business registration requirements. State penalties generally work the same way federal ones do.