No state income tax
Tennessee repealed the Hall Tax on interest and dividends effective January 1, 2021. Tennessee has no tax on wages and no broad personal income tax. Employee pre-tax savings stack is federal marginal rate plus 7.65% FICA only - no state marginal layer. A $3,300 healthcare FSA election saves about $1,050 for a 22% federal bracket Tennessee employee versus about $1,360 for the same California employee. Matchbook calibrates under-election guardrails tighter for Tennessee because the marginal cost of forfeiture is unchanged but the savings-per-dollar is lower.