The 2026 401k contribution limit is $23,500 ($31,000 if you are 50+). In South Carolina, pre-tax contributions reduce your taxable income at both federal (22%–37%) and SC state (0%–6.5%) levels. Annual tax savings on a full contribution: $6,698.
South Carolina taxes 401k and traditional IRA distributions as ordinary income at up to 6.5%. On a $59,300/year retirement income, that is $3,855 per year in state tax. Consider Roth 401k contributions if you expect to retire in SC and your future bracket is similar to today.