State income tax: 5% flat

Massachusetts Self-Employment Tax Calculator 2026

Rates reviewed September 9, 2026

Massachusetts has a flat 5% income tax on self-employment income. A 4% surtax applies to income over $1 million.

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Net Self-Employment Income

Gross income minus business expenses

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This content is for informational and educational purposes only. It does not constitute tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified CPA or Enrolled Agent for your specific situation.

Massachusetts self-employment tax questions

What is the self-employment tax rate in Massachusetts?

The self-employment tax rate is 15.3% on net self-employment earnings up to $184,500 for 2026, then 2.9% above that. It is a federal tax, so the rate in Massachusetts is the same as every other state. Massachusetts separately taxes that income at 5% flat.

Do freelancers in Massachusetts pay self-employment tax?

Yes. Every freelancer and independent contractor in the US, Massachusetts included, owes self-employment tax once net self-employment earnings reach $400 for the year. You can deduct half of the SE tax from gross income on your federal return.

Does Massachusetts have its own self-employment tax?

No. Massachusetts does not levy a separate self-employment tax. It taxes self-employment income as ordinary income at 5% flat, which is a different tax from the federal 15.3% SE tax. Massachusetts has a flat 5% income tax on self-employment income. A 4% surtax applies to income over $1 million.

How much of self-employment tax is deductible in Massachusetts?

Half of your self-employment tax is deductible from gross income on your federal return, which lowers federal income tax but not the SE tax itself. The deduction is federal; Massachusetts treatment follows its own rules for calculating state taxable income.

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