New Hampshire tax deadlines in 2026: filing dates and estimated payments
Deadlines that fall in calendar 2026: the 2025 return and the 2026 estimated payments. Different year? See New Hampshire 2025 →
No state individual income tax return required for the 2025 tax year. New Hampshire's Interest & Dividends Tax was repealed effective for tax periods beginning on or after January 1, 2025; no DP-10 return is issued for 2025. (New Hampshire never taxed wages.)
Source: revenue.nh.gov.
Federal deadlines in 2026
| 2025 Form 1040 | April 15, 2026 · extension October 15, 2026 |
|---|---|
| 2025 S-corp (1120-S) & partnership (1065) | March 16, 2026 |
| 2025 C-corp (Form 1120) | April 15, 2026 |
| 2026 federal estimated payments (1040-ES) | April 15, 2026 · June 15, 2026 · September 15, 2026 · January 15, 2027 |
Source: IRS Publication 509 and Form 1040-ES instructions, irs.gov.
Frequently asked questions
Does New Hampshire have a state income tax?
New Hampshire does not levy a broad individual income tax, so there is no state individual return due in 2026. You still need to file your federal return, and any state business, franchise, or excise taxes that apply to you.
What deadlines still apply in 2026 if I live in New Hampshire?
Your federal deadlines still apply: the 2025 Form 1040 is due April 15, 2026, with an extension to October 15, 2026, and 2026 federal estimated payments are due April 15, 2026, June 15, 2026, September 15, 2026, January 15, 2027.
Dates are the statutory deadlines that fall in 2026 and move to the next business day when they land on a weekend or holiday. Each section links to the source it was checked against. Always confirm with the New Hampshire tax agency or the IRS before relying on a date. This is general information, not tax advice.