What is South Carolina state income tax on my paycheck?
From 2026 (Act 110) South Carolina taxes income at 1.99% up to $30,000 of taxable income and 5.21% above, after the SC Income Adjusted Deduction ($15,000 single / $30,000 married filing jointly, phased out between $40,000–$95,000 single and $80,000–$190,000 joint). Withholding on your paystub depends on your filing status, allowances or W-4 elections, and taxable wages after pre-tax deductions.