Massachusetts Paycheck Calculator 2026

Massachusetts income tax in 2026

Massachusetts taxes most income at a flat 5%, including wages, interest, dividends, capital gains held over one year, business income, and pension distributions. Short-term capital gains (held one year or less) are taxed at 8.5% — one of the few states that distinguishes short-term gains for state purposes.

Massachusetts allows a personal exemption ($4,400 single / $8,800 joint) and a dependent exemption ($1,000 per dependent). There is no standard deduction in the federal sense, but specific subtractions apply for Social Security tax paid (up to $2,000), commuter expenses (up to $750), rent (up to $4,000 of rent paid on principal residence), and Massachusetts 529 contributions ($1,000 single / $2,000 joint per year).

The Massachusetts millionaire's surtax

The 4% surtax applies to Massachusetts taxable income above $1,083,150 for 2026 (indexed annually). The threshold applies per filer, not per spouse — married couples filing jointly face the surtax once combined Massachusetts taxable income crosses the threshold. The surtax applies to all income types treated as Massachusetts income, including long-term capital gains, RSU vesting, and one-time liquidity events.

For a Boston-area founder or executive realizing a $5M long-term capital gain in a single year, the surtax adds approximately $156,000 of state tax above what the flat 5% rate alone would produce. Multi-year planning, installment sale structures, qualifying for Section 1202 QSBS exclusion, and pre-sale residency moves to a no-income-tax state are common responses among high-income MA residents.

Massachusetts retirement income treatment

Social Security is fully exempt from Massachusetts income tax. Distributions from federal Civil Service Retirement System, military pensions, and Massachusetts state and municipal pensions are also fully exempt. Other 401(k), 403(b), and IRA distributions are taxable at 5%.

Roth IRA and Roth 401(k) distributions are non-taxable both federally and in Massachusetts, making Roth conversions especially attractive for MA residents — particularly those at risk of bumping above the $1.08M surtax threshold in any future year.

Massachusetts credits and deductions

• Earned Income Credit — 40% of the federal EITC, refundable (raised from 30% in recent years).
• Senior Circuit Breaker Credit — up to $2,590 for filers age 65+ whose property tax (or 25% of rent) exceeds 10% of total income, under the income limit (~$72,000 single).
• Child and Family Tax Credit — $440 per dependent child under 13 or per disabled/senior dependent (refundable).
• Lead Paint Removal Credit — up to $1,500 per residential unit.
• Septic Replacement Credit — up to $6,000 for Title V system replacement (recently expanded).
• Massachusetts 529 (U.Fund, U.Plan) deduction — $1,000 single / $2,000 joint per year.

Massachusetts property tax

Massachusetts uses Proposition 2½ to cap annual increases in total municipal property tax levies at 2.5% (excluding new growth and voter-approved overrides). Individual bills can still rise faster as values shift, but the cap on total levies provides systemic protection.

Boston's Residential Exemption reduces the assessed value of owner-occupied residences by up to ~$3,500 (variable by year) — a particularly valuable shield in a high-value market. Many Greater Boston cities (Cambridge, Somerville, Brookline) also offer residential exemptions and senior exemptions tied to income.

Massachusetts tax planning moves

• Model the millionaire's surtax for any year with significant equity vesting, business sale, or property gain. Splitting transactions across years can keep multiple years below the $1.08M threshold.
• Take the Massachusetts 529 deduction every year even at the small $1,000/$2,000 cap — it compounds meaningfully over 18 years.
• Use the Senior Circuit Breaker if you are 65+ and meet the income limit — it is refundable and frequently missed.
• Consider Roth conversions in years between major income events, especially if the surtax is in play in later years.
• For pass-through business owners, the Massachusetts PTET election restores SALT deductibility for federal purposes up to the entity payment.