Self-Employment Tax Calculator

This self-employment tax calculator helps freelancers, contractors, sole proprietors, and small business owners estimate self-employment tax, income tax, and quarterly payment needs using simplified assumptions.

When you are self-employed, there is usually no employer withholding tax from each payment. That means you may need to set aside money throughout the year for Social Security, Medicare, federal income tax, and any state or local taxes that apply.

If you earn $80,000 from freelance work and have $15,000 of deductible business expenses, your net profit is $65,000 before tax adjustments. The calculator uses that kind of net figure to estimate self-employment tax and income tax planning amounts.

The important lesson is that revenue is not take-home pay. A strong month of client income can still require a large tax reserve, especially if estimated payments have not been made during the year.

Self-employed workers may need to make estimated tax payments during the year instead of waiting until the annual return. Planning quarterly can reduce the chance of a surprise bill, underpayment penalties, or cash flow stress at tax time.

Income can also be uneven. A simple percentage set aside from each paid invoice can be easier to manage than trying to catch up after a busy quarter.

Track business expenses carefully, separate tax savings from operating cash, review profit every month, and recalculate estimates when income changes. Common deductions may include software, equipment, professional services, mileage, home office costs, and insurance, depending on your circumstances.

This calculator is for planning only. Use it to understand the scale of the liability, then confirm exact amounts with IRS guidance or a qualified tax professional before filing or making major decisions.

Use this calculator to estimate US self-employment tax from self-employment income, business expenses, other W-2 income, and an optional simplified federal income tax layer.

The component starts with net profit, applies a simplified self-employment tax calculation, and shows an estimated quarterly payment.

Use estimated tax when the next question is how to split a remaining annual tax estimate into payments.

Use social security tax or medicare tax if you want to isolate one payroll-tax component.

Keep entity planning, S-corp salary decisions, state tax, deductions, credits, and Form 1040 adjustments outside this calculator unless you have adjusted inputs yourself.

Paying SE tax on gross receipts instead of net profit after allowable expenses.

Treating the simplified federal income tax layer as a full Form 1040 calculation.

Forgetting that state tax, local tax, credits, retirement plans, health insurance, and other deductions are outside the component.

Using this page for W-2 employee payroll. Use payroll tax when the income is wages from an employer.

Assuming S-corp salary and distribution planning is modelled. It is not.

Example: enter $60,000 of self-employment income and $5,000 of business expenses. The calculator estimates net profit, SE tax, optional federal income tax, take-home, and a quarterly payment.

Add W-2 income only when it should affect the simplified federal income tax estimate in this model.

Toggle simplified federal income tax off if you only want to isolate the self-employment tax component.

Change income and expenses as actual invoices and costs arrive, because net profit is the base of the calculation.

Use estimated tax to size remaining payments once you have an annual tax estimate.

Use federal income tax if you want a separate federal bracket estimate before deciding whether the simplified federal layer is enough.

Use payroll tax when comparing with W-2 wages and paycheck withholding.

Use day rate take-home for freelance pricing and working-time economics rather than tax-only planning.

Check gross receipts against invoices, platform statements, and bank deposits.

Check business expenses before entering them, because overstating expenses will understate tax.

Check whether other W-2 income, spouse income, credits, retirement contributions, or state tax need a more detailed model.

Rerun this self-employment tax calculator when income, expenses, W-2 income, or the simplified federal tax toggle changes.

Recheck after each quarter if income is uneven or expenses arrive in batches.

If this estimate differs from tax software, trace net profit, SE taxable base, federal income tax layer, and quarterly payment separately.