South Carolina 401(k) Calculator 2025

South Carolina uses a progressive income tax system with multiple brackets. Traditional 401(k) contributions reduce both your federal and South Carolina state taxable income. Because the state uses progressive brackets, the tax savings from your contributions depend on your marginal state tax rate.

Higher-income earners in South Carolina benefit the most from pre-tax 401(k) contributions, as their savings come from the highest applicable bracket. If you expect to be in a lower bracket in retirement, a traditional 401(k) can provide significant lifetime tax savings.

The standard deduction in South Carolina is $14,600 for single filers and $29,200 for married filing jointly. Your 401(k) contributions reduce your income before this deduction is applied.

When you withdraw from your 401(k) in retirement, distributions will be taxed as ordinary income under South Carolina's progressive brackets. If you expect to be in a higher bracket in retirement, consider a Roth 401(k) option if your employer offers one.