Massachusetts Capital Gains Tax 2026
Estimate the state tax attributable to a gain, then separate it from the federal capital-gains calculation.
State-specific rule
The state surtax can also apply above its indexed income threshold. Collectibles and certain pre-1996 gains have separate rules.
Calculate the Massachusetts state layer
Enter other state taxable income so the calculator can measure the incremental tax created by the gain.
State tax on gain
$5,000State tax before gain
$5,000State tax after gain
$10,000Models the gain as additional state taxable income using the selected year’s state brackets. State-specific exclusions, credits and local taxes are not included.
Frequently asked questions
Does Massachusetts have a lower rate for long-term capital gains?
Massachusetts generally taxes long-term gains at the same rate as wages and most other income, while most short-term gains use a higher short-term capital-gains rate.
Does this include federal capital gains tax?
No. This page estimates the state layer. Use the federal capital gains calculator for the 0%, 15% or 20% long-term rate, ordinary short-term rates and possible 3.8% NIIT.
Why does other income change the result?
The gain can stack on top of other taxable income. In a progressive system, some or all of the gain may therefore fall into higher state brackets.
Sources
Related Calculators
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Capital Gains Tax Calculator
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NIIT Calculator
Net Investment Income Tax 3.8%, thresholds $200k / $250k MFJ
Tax-Loss Harvesting
Capital loss utilization, $3k annual deduction, carryforward