Self Employment Tax Calculator
Estimate U.S. self-employment tax on freelance, creator, contractor, side-hustle, and small business profit. This calculator uses 2026 Social Security and Medicare figures, including the $184,500 Social Security wage base and Additional Medicare Tax thresholds.
Estimate self-employment tax
Enter business profit after expenses, W-2 wages, filing status, and estimated payments. The result separates Social Security tax, Medicare tax, Additional Medicare Tax, the half-SE-tax deduction, and a quarterly savings target.
How this self-employment tax estimate works
Self-employment tax covers Social Security and Medicare for people who work for themselves. Employees split those taxes with an employer. A freelancer, creator, contractor, consultant, marketplace seller, or sole proprietor generally pays both the employer and employee side through self-employment tax. That is why the rate often feels high even before regular federal income tax is considered.
The calculator first multiplies net self-employment profit by 92.35%, which is the common Schedule SE base for net earnings from self-employment. It then applies the Social Security portion to the remaining wage base and applies the Medicare portion to the full self-employment base. If income is high enough, it estimates the 0.9% Additional Medicare Tax above the filing-status threshold. It also shows the deduction for one-half of self-employment tax, which may reduce adjusted gross income.
Social Security
For 2026, Social Security tax applies up to the $184,500 wage base across covered wages and self-employment earnings.
Medicare
Medicare tax has no wage base limit. The 2.9% self-employed Medicare portion applies broadly to the self-employment base.
Additional Medicare
An extra 0.9% can apply above thresholds based on filing status. The threshold is not indexed the same way as the wage base.
2026 self-employment tax reference
| Item | 2026 planning figure | How it affects the estimate | Source note |
|---|---|---|---|
| Self-employment tax rate | 15.3% total before wage-base limits | 12.4% Social Security plus 2.9% Medicare | IRS Topic 554 describes the rate components. |
| Social Security wage base | $184,500 | Only earnings up to this base are subject to the Social Security portion for 2026. | SSA Contribution and Benefit Base. |
| Medicare wage base | No limit | Medicare continues after the Social Security wage base is reached. | SSA and IRS guidance state no HI taxable maximum after 1993. |
| Additional Medicare threshold | $200,000 single or other, $250,000 married filing jointly, $125,000 married filing separately | Income above the threshold may face the extra 0.9% Medicare tax. | IRS Topic 554. |
| Half-SE-tax deduction | One-half of self-employment tax | Shown as a planning deduction, not as a refund. | Reported through Schedule SE and Schedule 1. |
What this calculator does not replace
This tool estimates the self-employment tax layer. It does not prepare a tax return, calculate every federal income tax bracket, compute state tax, apply qualified business income rules, classify workers, or decide whether an expense is deductible. If your income is high, your work crosses states, you have employees, you changed business structure, or you received both W-2 and 1099 income, a qualified tax professional can help prevent expensive surprises.
Use the result to plan cash flow. Many self-employed people get into trouble because tax is not withheld from each payment. A strong month can feel like spendable cash until quarterly estimated payments or the April filing deadline arrives. Moving a percentage of every payment into a separate tax account makes the bill more visible and less emotional.
If creator income is part of your self-employment plan, compare this page with broader monetization resources such as BIGO LIVE's guide to earning money from live streaming and self-media management costs. More income is useful only when the business also protects cash for taxes, tools, savings, and recovery.
FAQs
What is self-employment tax?
Self-employment tax is the Social Security and Medicare tax paid by people who work for themselves. It is separate from regular federal income tax and is generally calculated on net earnings from self-employment.
What is the self-employment tax rate for 2026?
The combined self-employment tax rate is commonly described as 15.3%, made up of 12.4% for Social Security and 2.9% for Medicare. The Social Security portion is limited by the 2026 wage base.
Does Medicare tax have an income cap?
No. Medicare tax does not have a wage base limit. High earners may also owe Additional Medicare Tax above the applicable filing-status threshold.
Why does the calculator use 92.35% of profit?
Schedule SE generally calculates net earnings from self-employment as 92.35% of net self-employment profit before applying the Social Security and Medicare portions.
Do W-2 wages reduce self-employment tax?
W-2 wages can reduce the remaining Social Security wage base, but they do not eliminate Medicare tax on self-employment income. The calculator accounts for W-2 wages when estimating the Social Security portion.
Is this a complete federal income tax calculator?
No. It estimates self-employment tax and an optional reserve for income tax planning. Your full tax return may include deductions, credits, federal income tax, state tax, and other rules.
References
- Social Security Administration. Contribution and Benefit Base. https://www.ssa.gov/oact/COLA/cbb.html
- Internal Revenue Service. Topic no. 554, Self-employment tax. https://www.irs.gov/taxtopics/tc554
- Internal Revenue Service. Publication 15 (2026), Employer's Tax Guide. https://www.irs.gov/publications/p15
