Quick answer: zero — New Hampshire charges no state capital gains tax at all, on this sale or any other. See the full cost picture in the New Hampshire probate real estate sale calculator.
One of only nine states with no capital gains tax
A tax that used to exist, now fully gone
Historically, the Interest and Dividends Tax taxed interest and dividend income specifically — never wages, and never capital gains — at rates phased down from 4% in 2023 to 0% by 2025, when it was fully eliminated.
No estate or inheritance tax either
New Hampshire repealed its estate tax in 2003 and has no inheritance tax — one of relatively few states offering that combination alongside zero income and capital gains tax.
The trade-off: high property taxes
New Hampshire has among the highest property tax rates in the country, since the state relies heavily on property taxes in place of income or sales tax revenue — worth knowing for anyone weighing the overall tax picture, not just the sale itself.
A local probate attorney can review your estate — many offer a free consultation.
The zero-capital-gains-tax rule applies identically across all ten of New Hampshire's counties.