The 2026 401k contribution limit is $23,500 ($31,000 if you are 50+). In Alaska, pre-tax contributions reduce your taxable income at both federal (22%–37%) and the federal level only (no state income tax). Annual tax savings on a full contribution: $5,170.
Alaska exempts retirement income from state taxes. This means your 401k distributions, IRA withdrawals, and pension income are not taxed at the state level. This effectively gives AK retirees a 5.0% annual boost compared to states that fully tax retirement income.