Applies
Iowa moved to a flat 3.8% individual income tax effective January 1, 2025, accelerated from the previously scheduled 3.9% in 2026. The employee pre-tax savings stack is federal marginal rate plus 7.65% FICA plus 3.8% Iowa. A $3,300 healthcare FSA election saves about $1,376 for a 22% federal bracket Iowa employee, roughly $125 more than the same election in a no-state-tax state. Matchbook calibrates Iowa under-election guardrails wider than no-tax states because the marginal savings-per-dollar is higher.