Massachusetts capital gains tax calculator

Massachusetts taxes capital gains on top of federal tax: long-term 5%; short-term (< 1 yr) 8.5%; 4% surtax on income above ~$1.1M not included.

Calculate my Massachusetts tax

Your details

$
Income before capital gains. The 2026 standard deduction is subtracted automatically
$
Sale price minus your cost basis (what you originally paid)
Long-term 5%; short-term (< 1 yr) 8.5%; 4% surtax on income above ~$1.1M not included
2026 IRS rates — Rev. Proc. 2025-32

Your tax estimate

Estimated total tax on the gain
$10,000
on a $50,000 long-term gain
Effective rate: 20.0%
80%you keep
Net gain (you keep)$40,000
Federal CGT$7,500
Massachusetts tax$2,500
Capital gain$50,000
Federal long-term rate15.0%
Federal CGT$7,500
Total federal tax$7,500
Massachusetts (5.0%)$2,500
Total tax$10,000
Net gain after tax$40,000
Talk to a tax advisorFacing $10,000 of tax on this sale? Ask a CPA how to bring it downComplex situations — real estate, business sales, large stock positions — benefit from a CPA. TaxBuzz connects you to vetted tax professionals near you.Find a CPA →
Estimate only — 2026 IRS federal rates plus approximate state top marginal rates. Consult a tax professional before acting on these numbers.

What you would pay in Massachusetts

Long-term gains (assets held more than a year) for a single filer with $75,000 of other income:

GainFederal + NIITMassachusettsTotal taxYou keep
$25,000$3,750$1,250$5,000 (20.0%)$20,000
$50,000$7,500$2,500$10,000 (20.0%)$40,000
$100,000$15,000$5,000$20,000 (20.0%)$80,000
$250,000$42,250$12,500$54,750 (21.9%)$195,250

Short-term vs long-term gains in Massachusetts

Sell within a year and the federal government taxes the gain as ordinary income. On a $50,000 gain with the same income, that means $15,314 of tax if you sell short-term against $10,000 if you hold past one year, a difference of $5,314. Massachusetts also treats the two differently: 8.5% on short-term gains and 5.0% on long-term gains.

How we estimate Massachusetts tax

Long-term 5%; short-term (< 1 yr) 8.5%; 4% surtax on income above ~$1.1M not included. Where a state taxes gains as ordinary income on a sliding scale, the calculator applies the rate shown above to the whole gain, so for most people it is an upper estimate. Local and city income taxes are not included.

*Examples use 2026 IRS brackets, the standard deduction and the 3.8% Net Investment Income Tax. Change your filing status, income and holding period in the calculator above for your own figure.

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