Applies
North Dakota has three post-2023 brackets: 0% up to roughly $48,475 single / $80,950 joint, 1.95% to about $225,975 single / $275,100 joint, and 2.5% above that (2025 thresholds, indexed). Most rank-and-file ND employees sit in the 0% state bracket, so their pre-tax savings stack is essentially federal plus FICA - identical to a no-income-tax state. Matchbook calibrates ND under-election guardrails with a per-employee marginal lookup rather than a flat state rate, because the state layer is 0 for many employees and only 1.95%-2.5% for the rest.