No Income Tax
Longstanding Flat Tax
Recently Enacted Flat Tax
Flat Tax Laws Enacted 2025
Income Tax Phase-Out Enacted 2025
Other Tax Activity 2025
This is a triangle
Income tax repealed in 1980.
Income taxes prohibited by constitutional amendment in 1924.
Legislation to adopt a flat tax and then phase out the income tax over time if certain conditions are met passed the House in 2025 and has been carried over to the 2026 session.
Flat tax enacted in 2022.
Flat tax enacted in 2014.
Income tax phased out starting in 2016 with full repeal in 2021.
Legislation enacted in 2021 phased out its tax on interest and dividends as of January 1, 2025. New Hampshire has never had an income tax on wages.
Flat tax enacted in 1971.
Flat tax enacted in 2018, and legislation passed in 2022 that gradually phases out the income tax altogether if certain conditions are met.
Budget including a 2.75% flat tax enacted in 2025.
Flat tax enacted in 1967.
No income tax since statehood.
Legislation eancted in 2025 to lower the state's top income tax bracket and more toward a flatter tax.
Flat tax enacted in 2022.
No income tax since statehood, and voters approved a constitutional amendment in 2019 prohibiting any individual income taxes.
Flat tax enacted in 2021.
Flat tax enacted in 2007.
Flat tax enacted in 1987.
Income tax repealed in 1943.
Flat tax enacted in 2022.
Legislation enacted in 2025 to phase out the income tax by 2030 if certain conditions are met.
Flat tax enacted in 1965.
Flat tax enacted in 1969.
Legislation enacted in 2025 to eliminate the capital gains tax.
Legislation enacted in 2025 to reduce the top tax bracket and phase out the income tax over time.
Legislation enacted in April 2025 overriding the governor's veto to phase in a 4% flat tax if certain conditions are met.
Flat tax enacted in 2024.