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If you freelance, run a small business as a sole proprietor, or earn income as an independent contractor in the United States, taxes can feel confusing because no employer automatically withholds everything for you. The first step is to separate self-employment tax from federal income tax: they are related, but they are not the same tax.
This guide covers general federal rules for the 2026 tax year. State and local rules can differ, and your result depends on filing status, other income, deductions, and business structure. Use the GenFreeInvoice Tax Estimator as a planning aid, then verify important decisions with official IRS guidance or a qualified tax professional.
Self-employment tax generally funds Social Security and Medicare for people who work for themselves. For many self-employed individuals, the combined rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare. The tax is generally calculated on 92.35% of net earnings from self-employment, rather than simply applying 15.3% to every dollar of gross client payments.
The Social Security portion is subject to an annual wage base, and additional rules can apply depending on your income and circumstances. The Medicare portion does not have the same Social Security wage-base limit. If you also have wages from a job, that can affect the calculation. Read the IRS instructions for Schedule SE before filing.
Self-employment tax is not a replacement for federal income tax. Your business profit may also be included in your taxable income and taxed under the federal income-tax rules that apply to your filing status. Your final bill can also be affected by deductions, credits, health-insurance deductions, retirement contributions, and other income.
In general, you may deduct the employer-equivalent portion of self-employment tax when calculating adjusted gross income. That deduction does not reduce the self-employment tax itself. It is one reason a quick percentage of gross revenue cannot reliably predict your complete tax bill.
Imagine a freelancer receives $60,000 from clients and has $8,000 of ordinary and necessary business expenses. Before considering other adjustments, the business profit is $52,000 ($60,000 minus $8,000). That profit is a starting point for the self-employment tax calculation; it is not automatically the same as taxable income.
This example intentionally does not state a single final tax bill. Filing status, other wages, deductions, credits, and tax-year limits can materially change the result. Enter your details in the tax estimator for an approximate planning result and check its assumptions before relying on it.
Business expenses may reduce your net profit when they are ordinary and necessary for your trade or business and meet IRS recordkeeping rules. Common categories can include business-use portions of software, supplies, professional services, equipment, phone or internet, and qualifying travel. A deduction is not automatic just because you purchased something while working.
The IRS explains business expense requirements in its Deducting Business Expenses guide.
If you expect to owe enough tax after withholding and refundable credits, you may need to make estimated tax payments during the year. These payments can cover both income tax and self-employment tax. The amount and due dates depend on your circumstances, and some taxpayers avoid a penalty by meeting IRS safe-harbor rules.
Rather than treating a generic savings percentage as a tax rule, estimate your likely tax, review your prior-year return, and revisit the amount as income changes. The IRS provides details and payment instructions in its Estimated Taxes guidance. Always confirm the applicable deadlines for your tax year.
Better records usually produce a more useful estimate. If your situation includes employees, inventory, an S corporation, multiple states, foreign income, or complicated deductions, consider getting professional advice rather than relying on a basic calculator alone.
The free tax estimator can help you explore a rough estimate using the information you enter. Before using the result for budgeting, confirm that its tax year, filing status, income types, deduction assumptions, and tax coverage match your situation. A simplified tool may not include every credit, phase-out, state tax, or special rule.
Official reference points for 2026 planning include the IRS’s Tax Topic 554: Self-Employment Tax, Schedule SE instructions, and estimated tax guidance. Tax law can change, so check the latest official instructions when filing.
Use the tool as a starting point, then verify the assumptions that apply to you.
Open Tax EstimatorPeople with net earnings from self-employment may owe it, including many sole proprietors and independent contractors. The rules and thresholds depend on the type and amount of income. Check the current IRS instructions for your situation.
No. Self-employment tax generally covers Social Security and Medicare, while federal income tax is calculated separately. A self-employed person may owe both.
Eligible ordinary and necessary business expenses may reduce business profit. Keep records and check the specific rules for the expense; personal costs generally are not deductible as business expenses.
Some do. Whether payments are required depends on expected tax after withholding and credits and other IRS rules. Review the IRS estimated-tax guidance rather than relying on a universal percentage.
No. It is an independent planning tool and may use simplified assumptions. It does not replace IRS instructions, tax preparation software, or advice from a qualified professional.
Disclaimer: This article is general educational information about US federal tax rules, not individualized tax advice. Tax rules and thresholds can change. Verify current-year requirements with the IRS or a qualified tax professional.