1099 Tax Calculator South Carolina 2026
South Carolina has 3 income tax brackets ranging from 0% to 6.2% (top rate reduced from 6.4%, with further reductions to 6.0% scheduled). Income below $3,560 is exempt. South Carolina is moving toward a simpler 2-rate structure (1.99% / 5.21%) starting tax year 2026. Use the calculator below to estimate your federal + SC state + SE tax for 2026.
Net income after business expenses
Enter your income to see your tax breakdown
How South Carolina taxes self-employment income
South Carolina has graduated income tax brackets with a top rate of 6.20%.
South Carolina has 3 brackets with identical thresholds for single and MFJ. Top rate of 6.2% reduced from 6.4% (further reductions to 6.0% planned via tax triggers). Uses federal standard deduction. South Carolina is moving toward a 2-rate structure (1.99% / 5.21%) starting tax year 2026.
Federal tax also applies
Regardless of state, all 1099 contractors and self-employed workers in South Carolina owe federal income tax and self-employment tax. SE tax is 15.3% on net earnings (12.4% Social Security up to $184,500 in 2026, plus 2.9% Medicare with no cap). Federal income tax follows the standard bracket structure (10-37%).
The calculator above includes federal, SE, and South Carolina state tax in one estimate, and breaks down quarterly estimated payments due April 15, June 15, September 15, 2026, and January 15, 2027.