Massachusetts Paycheck Calculator
Massachusetts uses a flat 5.0% income tax for most income, plus a 4% 'millionaire surtax' on income above $1 million (added in 2023). For typical earners, the flat 5% rate is the simple version.
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Estimated Paycheck Breakdown
Estimate using 2026 federal brackets, $168,600 Social Security wage base, and the 0.9% Additional Medicare Tax on wages above $200,000 single / $250,000 MFJ.
Massachusetts State Income Tax: Flat 5.0% (+ 4% surtax over $1M)
Massachusetts charges a flat 5.0% on most income, but adds a 4% surtax on every dollar above $1 million in annual taxable income (the so-called 'Fair Share' or 'millionaire tax'), bringing the top effective rate to 9.0%. This calculator applies the flat 5.0% -- for incomes above $1M, expect a higher effective rate.
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