How does the Self-Employment Tax work?

US: SE tax = Net profit × 15.3% (SS 12.4% + Medicare 2.9%) Then: Deduct half of SE tax from taxable income Then: UK Class 4 NI: 9% on profits £12,570–£50,270 Then: Quarterly estimated payments required in the US.

Can you give an example of how to use the Self-Employment Tax?

Example: Input US: $80,000 net self-employment profit gives a result of SE tax ≈ $11,304; deduct $5,652 from taxable income.

Is the Self-Employment Tax free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Self-Employment Tax?

Our Self-Employment Tax uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Is this Self-Employment Tax accurate for my country?

This calculator uses general tax principles as a guide. Tax laws vary by country and are updated frequently — always verify with your national tax authority or a qualified tax professional.

Finanțe

Self-Employment Tax

Self-Employment Tax Calculator

Gross Self-Employment Income

Business Expenses

Self-employment tax covers Social Security and Medicare for freelancers who pay both employee and employer portions. In the UK, Class 2 and Class 4 NI applies.

Symbol	Name	Unit	Description
NetIncome	Net business income	Currency	—
SEtax	Self-employment tax	Currency	—
SS	Social Security portion (12.4%)	Currency	—
Medicare	Medicare portion (2.9%+)	Currency	—

Component	Rate	Cap
Social Security	12.4%	$168,600
Medicare	2.9%	No cap
Total	15.3%	On net earnings

References

›SE tax — IRS

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Self-Employment Tax

Self-Employment Tax Calculator

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