How to File Self-Employment Taxes: What to Pay & When

Self-employment taxes require three core IRS forms. Schedule C (Profit or Loss from Business) reports your business income and deductible expenses to determine net profit.

You also need Form 1040-ES (Estimated Tax for Individuals) to calculate and pay quarterly estimated taxes. This prevents a large tax bill and potential penalties when you file your annual return.

Here's a worked example: if your Schedule C shows $60,000 net profit, you multiply $60,000 by 92.35% to get $55,410. Then multiply $55,410 by 15.3% to calculate $8,478 in self-employment tax.

The Social Security portion applies only to earnings up to the annual wage base limit ($168,600 for 2024, $176,100 for 2025, per the Social Security Administration). Once your combined wages and self-employment income exceed that threshold, you pay only the 2.9% Medicare tax on the excess.

You calculate each payment using Form 1040-ES, which provides worksheets to estimate your annual self-employment income, deductions, credits, and total tax liability. Divide that total by four for your quarterly payment amount.

Missing a quarterly deadline triggers underpayment penalties unless you qualify for an exception. You generally avoid penalties if each quarterly payment equals at least 90% of the current year's tax or 100% of the prior year's total tax (110% if your prior-year adjusted gross income exceeded $150,000).

Schedule C lets you deduct ordinary and necessary business expenses from your gross income to calculate net profit. Common deductions include office supplies, professional services, advertising, business insurance, software subscriptions, and merchant processing fees.

Vehicle expenses are deductible if you use your car for business travel—track miles and use either the standard mileage rate (67 cents per mile for 2024, per IRS Notice 2024-8) or actual expenses including gas, maintenance, insurance, and depreciation. You cannot deduct commuting miles from home to your first client or from your last client home.

Keep receipts, bank statements, and mileage logs for at least three years. The IRS can audit returns within three years of filing (six years if you underreport income by more than 25%).

Start by organizing your income records: 1099-NEC forms from clients, 1099-K forms from payment processors, sales receipts, and bank deposits. Add up your total gross income for the year.

Finish Form 1040 by combining your self-employment income with wages, interest, dividends, and other income, applying your standard or itemized deductions, and calculating total tax. Subtract any quarterly estimated payments you already made and any withholding from W-2 jobs.

File electronically using IRS Free File (if your income qualifies), commercial tax software (TurboTax, H&R Block, TaxAct), or through a tax professional. E-filing reduces errors and speeds refunds.

Self-filing with software works well if your business has simple income and expenses, you're comfortable with tax forms, and you keep organized records. Most software guides you through the process with interview-style questions and automatic calculations.

Consider professional help if you're facing an audit, owe back taxes, or need to set up a retirement plan. The IRS maintains a directory of credentialed tax preparers at irs.gov, and you can verify an enrolled agent's status through the IRS Office of Professional Responsibility.

How do I file self-employment taxes for the first time?

What happens if I don't pay estimated quarterly taxes?

The IRS assesses underpayment penalties if you owe $1,000 or more at filing and didn't pay enough throughout the year. The penalty compounds quarterly based on the federal short-term rate plus three percentage points.

Can I deduct self-employment tax on my return?

You deduct half of your self-employment tax on Schedule 1 of Form 1040, reducing your adjusted gross income. This deduction reflects the employer-equivalent portion of the tax.

Do I pay self-employment tax if I have a loss?

What is the self-employment tax threshold for 2024 and 2025?

You must pay self-employment tax if your net earnings from self-employment reach $400 or more, regardless of your age or other income. This threshold has remained $400 for decades and applies to both tax years 2024 and 2025.

How is self-employment tax different from income tax?

Self-employment tax covers Social Security and Medicare contributions for independent workers—the equivalent of FICA taxes withheld from employee paychecks. The 15.3% rate includes both the employee and employer portions.