Self employment tax · South Carolina · 2026
South Carolina self employment
tax calculator (2026).
New for 2026 under Act 110: two brackets, 1.99% up to $30,000 of taxable income and 5.21% above. Enter your net business income for the full estimate.
Self employment tax is 15.3% on 92.35% of net profit.
Estimate only: not tax, legal, or financial advice, and provided with no warranty of accuracy. Figures are approximations of 2026 federal + state self employment tax and exclude credits, dependents, other deductions, retirement contributions, and QBI phaseouts above $191,950 single / $383,900 married, among other factors. Verify with a licensed tax professional before relying on these numbers.
How South Carolina taxes you
Two brackets, rewritten for 2026.
Two brackets for 2026: 1.99% up to $30,000 of taxable income, 5.21% above (Act 110 of 2026 consolidated the old 0/3/6% brackets and set a path toward a future 1.99% flat rate).
- $0 to $30,000: 1.99%
- $30,000+: 5.21%
State brackets verified 2026-07-29 against the Tax Foundation’s 2026 tables. Federal self employment tax is 15.3% of 92.35% of net income everywhere; only the state portion changes by location.
Worked example
$70,000 net income, single filer.
Estimate only: it excludes credits, dependents, retirement contributions, and QBI phaseouts. Talk to a CPA before you send the IRS a check this size. Plan your quarterly payments →
South Carolina, specifically
What makes South Carolina different.
South Carolina rewrote its brackets for 2026. Act 110 consolidated the old 0%, 3%, and 6% schedule into two brackets: 1.99% up to $30,000 of taxable income and 5.21% above it, with a stated path toward a future 1.99% flat rate. For a vendor earning under the threshold, this is now one of the cheapest income tax states in the country.
- Two brackets for 2026: 1.99% up to $30,000 of taxable income, 5.21% above (Act 110 of 2026).
- The consolidation replaced the old 0/3/6% schedule; forms printed before the middle of 2026 may still show it.
- The enacted path points toward a 1.99% flat rate in later years.
- Under $30,000 of taxable income, the effective state rate stays near the 1.99% floor.
Worked example: $115,000 net income, single filer.
Same caveat as the $70,000 example: credits, dependents, retirement contributions, and QBI phaseouts move the real number. Both examples are computed from the verified 2026 brackets, not figures written by hand.
South Carolina tax FAQ
Common questions.
- Does South Carolina tax self employment income in 2026? Yes. South Carolina has a graduated income tax in 2026, from 1.99% up to 5.21%. That sits on top of federal self employment tax and federal income tax. Two brackets for 2026: 1.99% up to $30,000 of taxable income, 5.21% above (Act 110 of 2026).
- How much should I set aside for taxes on $70,000 of net income in South Carolina? On $70,000 of net self employment income (single filer), the estimate is about $9,891 self employment tax, $4,065 federal income tax, and $2,423 South Carolina income tax: roughly $16,379 total, or about $4,095 per quarter (~23.4% effective). Adjust for your deductions and credits.
- What changed for South Carolina in 2026? Act 110 of 2026 collapsed the old three bracket schedule into two: 1.99% up to $30,000 of taxable income and 5.21% above. The change is retroactive to January 1, 2026, so it applies to this year's income.
- Do I pay South Carolina estimates quarterly? Yes, on the same four federal dates, at the new two bracket schedule (1.99% up to $30,000 of taxable income, 5.21% above).
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Book the work. Then handle the tax.
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