Massachusetts Income
Tax Rates & Rules
Massachusetts has a flat state income tax rate of 5%, applied to all taxable income regardless of income level.
Massachusetts Flat Income Tax Rate
Massachusetts tax year rates, most recently confirmed by the state Department of Revenue.
All Filing Statuses
| Taxable Income | Rate |
|---|---|
| All taxable income | 5% |
Massachusetts applies a single flat rate to all taxable income, regardless of income level or filing status.
Sources: Mass. DOR — 5.0% base rate; additional 4% surtax on taxable income over ~$1.1M. Last verified: August 14, 2026.
How Massachusetts Income Tax Works
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Frequently Asked Questions
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