Massachusetts Tax Guide (2026)
Comprehensive statutory analysis of Massachusetts individual income tax rates, Department of Revenue filing forms, extension guidelines, telecommuting sourcing rules, and pass-through entity tax provisions.
Key Statutory Tax Parameters (Massachusetts, 2026)
2026 Legislative & Statutory Highlights
Massachusetts levies a baseline flat individual income tax rate of 5.0% on earned income, plus an additional 4.0% 'Fair Share Amendment' surtax on taxable income exceeding $1,053,750 (indexed for inflation), resulting in a 9.0% top marginal rate on ultra-high earners. Short-term capital gains are taxed at 8.5%.
Massachusetts operates a flat personal income tax schedule with a statutory flat rate of 5.0%. Tax parameters are indexed annually or enacted through state legislative sessions. Taxpayers should ensure that adjustments for federal bonus depreciation, Section 179 expensing, and Net Operating Loss (NOL) carryforwards follow Massachusetts's specific rolling or static Internal Revenue Code conformity date.
Filing Forms, Deadlines & Extension Guidelines
Multi-State Workers & Telecommuting Sourcing Rules
Massachusetts taxes residents on worldwide income. During the pandemic, Massachusetts imposed sourcing rules on out-of-state remote workers that sparked landmark litigation with New Hampshire.
Pass-Through Entity (PTE) Tax & Small Business Rules
Massachusetts enacted an elective 63D Pass-Through Entity Tax (PTE Tax) at a rate of 5.0%, allowing owners to take a 90% refundable tax credit and bypass the federal SALT limit.
Estate & Inheritance Tax
Massachusetts levies a state estate tax with a $2,000,000 exemption threshold, featuring progressive rates from 0.8% to 16.0%.
Local & County Taxes
Massachusetts municipalities do not levy local earned income taxes.
Worked Tax Example: $120,000 W-2 Earner in Massachusetts
A single filer in Boston earning $120,000 pays approximately $5,750 in Massachusetts state income tax under the 5.0% flat rate (after personal exemptions), an effective state rate of 4.79%.
Calculate Your 2026 Massachusetts Tax Liability
Enter your taxable income, filing status, and municipal details below to calculate your customized state tax liability and print your executive summary.
Flat 5.00% on taxable income; an additional 4% surtax applies to income over $1,000,000 (effective top 9%). Also a 0.46% employer UI/payroll tax excluded from topRate. Note: MA applies a limited convenience-of-employer rule.
2026 Executive Massachusetts State Tax Audit Summary
Not tax, legal, or financial advice
FiscTalk provides general educational information from public sources. Your tax results depend on the full set of facts, your filing history, and the jurisdiction-specific rules that shift yearly. Before filing or making decisions, consult a licensed CPA, EA, or attorney. FiscTalk is not a fiduciary and is not affiliated with the IRS or any state agency.
Sources & methodology
Frequently Asked Questions: Massachusetts Taxes
Source-verified — not professional advice
Every figure on this page is checked in-house against its primary source — IRS revenue procedures and publications, state Departments of Revenue, and the text of the underlying statute — before publication. Last reviewed 2026-10-20. The full source list is at the bottom of this page. If you spot an error, see our corrections & standards policy.
Not tax, legal, or financial advice
FiscTalk provides general educational information from public sources. Your tax results depend on the full set of facts, your filing history, and the jurisdiction-specific rules that shift yearly. Before filing or making decisions, consult a licensed CPA, EA, or attorney. FiscTalk is not a fiduciary and is not affiliated with the IRS or any state agency.
Sources & methodology