Self-Employed Tax Calculator — South Carolina (2026)
Self-employed in South Carolina? Your tax bill has three layers that a W-2 employee never sees in full: 15.3% self-employment tax on 92.35% of net profit, federal income tax, and South Carolina state income tax. This calculator applies all three to your 2026 net profit and shows the quarterly amount you should be setting aside. South Carolina uses a progressive income tax with 3 brackets running from 0.00% up to 6.20%, applied after a state standard deduction of $16,100.
South Carolina Self-Employed Tax Calculator
Gross 1099 income minus business expenses.
Self-employment tax vs South Carolina income tax
Self-employment tax is federal and identical in all 50 states: 12.4% Social Security up to $184,500 of net earnings plus 2.9% Medicare with no cap. Half of it is deductible against income tax, which is why the calculator subtracts it before applying brackets.
South Carolina then taxes essentially the same profit figure at 0.00%–6.20%. On $80,000 of net profit that adds roughly $2,953 to the bill.
South Carolina has no separate city or county income tax, so the state figure above is the full sub-federal income tax you pay.
Deductions that matter for South Carolina freelancers
Net profit — not gross revenue — drives every number here. Ordinary and necessary business expenses reduce SE tax, federal tax, and South Carolina tax simultaneously: the 2026 standard mileage rate of $0.67/mile, home-office square footage, software, equipment, professional insurance, and the self-employed health insurance deduction.
Retirement plans go further. A SEP-IRA or solo 401(k) reduces income tax (though not SE tax) and is often the largest single deduction available to a profitable automotive contractor in Charleston.
Working for yourself in South Carolina
South Carolina's economy leans on automotive, aerospace, and tourism, which shapes the contractor market around Charleston — and your fixed costs. With one-bedroom rent near $1,900, a freelancer needs meaningfully more gross revenue than an employee to reach the same lifestyle, because there is no employer paying half of FICA.
South Carolina has steadily cut its top rate from 7% in 2022 down to 6.2% in 2025 — with a goal of reaching 6% by 2027.
Local and payroll taxes South Carolina adds on top
South Carolina adds no state-mandated employee payroll deduction beyond FICA, so nothing extra is taken from your gross pay at the state level.
South Carolina has no separate city or county income tax, so the state figure above is the full sub-federal income tax you pay.
Nobody withholds these for you when you are self-employed in South Carolina. Local wage taxes, city business licences and gross-receipts style levies are yours to register for and remit alongside your quarterly federal and state estimates.
Working across a state line from South Carolina
South Carolina has no income-tax reciprocity agreements, so if you live here and work across a state line you generally file a nonresident return in the work state and claim a credit at home to avoid double taxation.
Remote and hybrid work complicates this further: most states tax income where the work is physically performed, so a Charleston resident spending part of the year at a client site in North Carolina may owe a nonresident return there. Keep a day-count log if you split time between states.
The rest of your South Carolina tax bill
South Carolina charges a 6% state sales tax, homeowners pay an average effective property tax of 0.57% of market value, and the minimum wage in force during 2026 is $7.25 an hour.
Local option taxes bring most areas to 7%–9%.
Income tax is only one part of a state's take. South Carolina recovers revenue through sales and property tax as well, which is why headline income tax rates alone are a poor guide to how far a salary really goes. South Carolina exempts Social Security and offers a $10,000 retirement deduction plus a $15,000 senior deduction at 65+.
South Carolina vs North Carolina on the same salary
On a $90,000 salary, a single filer keeps about $68,222 a year in South Carolina against roughly $68,669 in North Carolina — a difference of $447, or $37 a month.
Effective combined rates are 24.2% in South Carolina and 23.7% in North Carolina. Set that gap against living costs: index 95 here versus 96 there, with property tax at 0.57% and 0.8% respectively.
South Carolina income tax brackets 2026 (single filer)
| Taxable income | Rate |
|---|---|
| $0 – $3,460 | 0.00% |
| $3,460 – $17,330 | 3.00% |
| $17,330 and up | 6.20% |