No state income tax
New Hampshire has no tax on wages, and the 3% Interest and Dividends tax was fully repealed effective January 1, 2025 (HB 2, 2023 session). The employee pre-tax savings stack is federal marginal rate plus 7.65% FICA only - no state layer at all, including on investment income. A $3,300 healthcare FSA election saves about $1,050 for a 22% federal bracket NH employee. Matchbook calibrates under-election guardrails identically to other no-state-tax jurisdictions: savings-per-dollar is lower, so forfeiture hurts more per dollar of over-election.