What is the Massachusetts income tax rate?

Massachusetts has a flat income tax rate of 5.0%. All taxable income is taxed at this same rate regardless of income level.

Does Massachusetts have a standard deduction?

Massachusetts does not offer a state standard deduction. Your state taxable income may be based on your federal adjusted gross income.

How is Massachusetts income tax calculated?

Massachusetts uses a flat tax system. After subtracting your standard deduction (if applicable), your remaining taxable income is taxed at a flat rate of 5.0%, then added to your federal tax and FICA obligations.

How do I calculate my total Massachusetts tax bill?

Your total tax includes federal income tax (10%–37%), Social Security (6.2% on the first $176,100), Medicare (1.45%), and Massachusetts state income tax. Use our free calculator above for an instant breakdown.

Massachusetts Income Tax Calculator 2026

Estimate your Massachusetts (MA) income tax for 2026. Massachusetts has a 5.0% flat state income tax. Enter your income below and click “Calculate Taxes” for an instant breakdown.

Note: 4% surtax on income over $1M

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Massachusetts Income Tax Overview

Massachusetts has a flat income tax rate of 5.0%. This means all taxable income is taxed at the same rate regardless of how much you earn.

Key Facts About Massachusetts Taxes

Massachusetts passed the "Fair Share Amendment" (Millionaire's Tax) in 2022, adding a 4% surtax on income exceeding $1 million — effectively creating a 9% top rate despite the constitutional flat tax.

The state has no standard deduction but offers personal exemptions of $4,400 (single) or $8,800 (married). Massachusetts also taxes short-term capital gains at 8.5% while long-term gains are taxed at the standard 5% rate.

Frequently Asked Questions

What is the Massachusetts income tax rate?: Massachusetts has a flat income tax rate of 5.0%. All taxable income is taxed at this same rate regardless of income level.
Does Massachusetts have a standard deduction?: Massachusetts does not offer a state standard deduction. Your state taxable income may be based on your federal adjusted gross income.
How is Massachusetts income tax calculated?: Massachusetts uses a flat tax system. After subtracting your standard deduction (if applicable), your remaining taxable income is taxed at a flat rate of 5.0%, then added to your federal tax and FICA obligations.
How do I calculate my total Massachusetts tax bill?: Your total tax includes federal income tax (10%–37%), Social Security (6.2% on the first $176,100), Medicare (1.45%), and Massachusetts state income tax. Use our free calculator above for an instant breakdown.

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