Massachusetts Tax Brackets 2025 – Massachusetts maintains one of the simplest state income tax structures in the U.S. with a flat 5% rate on most income for tax year 2025. Unlike states with multiple progressive brackets, MA applies this single rate to wages, salaries, interest, dividends, and most capital gains — with key exceptions for certain capital gains and a 4% surtax (creating a 9% effective top rate) that kicks in only at very high income levels.
This guide breaks down everything USA taxpayers need to know about Massachusetts tax brackets 2025, including the official rates, surtax threshold, capital gains treatment, deductions, filing requirements, and how to calculate your tax liability. All information comes directly from the Massachusetts Department of Revenue (DOR) as of late 2025/early 2026 updates.
2025 Massachusetts Income Tax Rates at a Glance
Massachusetts does not use traditional graduated tax brackets like the federal system. Instead, it applies a flat 5% tax rate to nearly all taxable income.
Here’s the breakdown for tax year 2025:
| Income Type | Tax Rate | Notes |
|---|---|---|
| Wages, salaries, tips, commissions, pensions, business income, most interest & dividends, most long-term capital gains | 5.00% | Applies to the vast majority of income |
| Short-term capital gains | 8.50% | Gains from assets held 1 year or less |
| Long-term capital gains on collectibles (e.g., art, coins, antiques) | 12.00% (subject to 50% deduction) | Special rate with partial deduction |
| All taxable income exceeding threshold | +4% surtax on the amount over threshold | Creates effective 9% rate on excess for most income types |
Key threshold for 2025: The 4% surtax applies to taxable income exceeding $1,083,150. This is an increase from $1,053,750 in tax year 2024.
Effective rates example:
- Income up to $1,083,150 → 5% flat (or 8.5%/12% for special capital gains)
- Income above $1,083,150 → 5% on entire amount + 4% on the excess over $1,083,150 (effective 9% on dollars above the threshold for ordinary income)
How the 4% Millionaires Surtax Works in 2025?
Often called the “Millionaires Tax,” the 4% surtax (passed via ballot initiative) applies to all taxable income above $1,083,150 — not just the excess, but the surtax itself is calculated only on the portion exceeding the threshold.
Who it affects:
- Full-year residents (Form 1)
- Part-year residents and nonresidents (Form 1-NR/PY) with Massachusetts-source income
- Trusts, estates, and certain organizations
Calculation: Add up your Massachusetts taxable income (Parts A + B + C, with negatives treated as zero and no cross-part offsetting). Subtract $1,083,150 from that total, then multiply the difference by 4%. Report it using Schedule 4% Surtax.
The surtax also affects withholding (9% on supplemental wages once the threshold is met), estimated payments, and credits for taxes paid to other jurisdictions.
Massachusetts Capital Gains Tax Rules 2025
Capital gains receive special treatment:
- Most long-term capital gains (including those from dividends and interest) → taxed at the flat 5% rate (plus surtax if applicable).
- Short-term capital gains → 8.5% flat rate.
- Collectibles (long-term) → 12% rate with a 50% deduction allowed.
All capital gains and losses are included in Massachusetts gross income and flow through to the calculation of taxable income.
Filing Requirements for Massachusetts Residents & Nonresidents in 2025
You must file a Massachusetts personal income tax return if your Massachusetts gross income is $8,000 or more (per person — not a joint threshold).
- Full-year residents: File Form 1 if you lived in MA all year or maintained a home and spent more than 183 days in the state.
- Part-year residents: File Form 1-NR/PY.
- Nonresidents: File Form 1-NR/PY only for Massachusetts-source income.
Deadline: April 15, 2026 (or next business day). Electronic filing and payment are required if you owe the surtax.
Deductions, Exemptions & Taxable Income Calculation
Massachusetts does not offer a standard deduction like the federal return. Instead, you subtract specific deductions and personal exemptions to arrive at taxable income.
Common deductions include:
- Rent paid (limited)
- Student loan interest (MA undergraduate and federal)
- HSA and Archer MSA contributions
- Self-employed health insurance
- Certain business expenses
- Alimony paid
- And many more (full list on Schedule Y and DOR instructions)
Personal exemptions are available based on filing status and number of dependents. These reduce your taxable income further.
Massachusetts gross income starts with your federal gross income and makes state-specific additions/subtractions. Most (but not all) federal deductions conform.
Step-by-Step: How to Calculate Your 2025 MA Tax Liability?
- Determine Massachusetts gross income.
- Calculate Massachusetts adjusted gross income (add/subtract per Schedules B, D, Y).
- Subtract allowable deductions and personal exemptions → Taxable income.
- Apply the 5% (or 8.5%/12%) rate.
- If taxable income > $1,083,150, add 4% surtax on the excess.
- Apply credits, withholding, and estimated payments.
Use the official 2025 Form 1 instructions and Schedule 4% Surtax (available on mass.gov) for exact worksheets.
Recent Changes & What to Watch for in 2025 Taxes
- Surtax threshold rose to $1,083,150 (inflation-adjusted).
- Federal conformity is generally frozen as of January 1, 2024, with limited current-year updates.
- No change to the base 5% flat rate.
A 2026 ballot initiative has been proposed to lower the base rate to 4%, but it does not affect tax year 2025.
Massachusetts Tax Brackets 2025 vs. Federal Tax Brackets
Massachusetts’ flat-rate system is far simpler than the federal progressive brackets (which top out at 37% for 2025). However, the 4% surtax creates a 9% top marginal rate that applies at a much higher income level than most states. Combined with federal taxes, high earners in MA face a significant overall burden.
Tips for Massachusetts Taxpayers Filing 2025 Returns
- Track capital gains carefully — short-term vs. long-term makes a big difference.
- Maximize allowable MA-specific deductions (rent, student loans, commuter benefits).
- Use DOR’s online tools and Circular M for withholding guidance.
- High earners: Plan estimated payments to include the surtax and avoid underpayment penalties.
- Nonresidents: Only report MA-source income.
For the most accurate results, download the official 2025 Massachusetts Personal Income Tax Forms and instructions directly from mass.gov. Tax software that supports MA (TurboTax, H&R Block, TaxSlayer, etc.) will automatically handle the flat rate and surtax calculation.
Bottom line: For the vast majority of Massachusetts residents and workers, the 2025 tax rate remains a straightforward 5%. Only those with taxable income well over $1 million will see the additional 4% surtax. Always consult a tax professional or the Massachusetts DOR for your specific situation.