South Carolina Income Tax 2026
South Carolina has graduated income tax rates from 0% to 6% in 2026. The top rate applies to single-filer taxable income above $18,230. South Carolina applies a 0% rate to the first slice of income, with the top 6% rate starting around $18,000.
2026 Rate
0%–6%
Structure
Graduated brackets
Top Rate Starts (Single)
$18,230
How South Carolina income tax works
South Carolina uses marginal brackets. Income in each band is taxed at that band's rate, so reaching the 6% bracket does not cause all of your income to be taxed at 6%. Your effective rate is normally lower than your highest marginal rate.
South Carolina applies a 0% rate to the first slice of income, with the top 6% rate starting around $18,000. Filing status matters because bracket widths, deductions and exemptions may differ for single and married filers. Use these rates for comparison and planning, then confirm your return with the current instructions from the South Carolina tax agency.
South Carolina paycheck planning examples
These examples apply a 3% planning rate to gross pay to show scale. They are not tax-return calculations and do not include deductions, credits, local taxes or special income rules.
| Annual gross pay | Planning rate | Illustrative annual amount | Monthly equivalent |
|---|---|---|---|
| $50,000 | 3% | $1,500 | $125 |
| $100,000 | 3% | $3,000 | $250 |
| $200,000 | 3% | $6,000 | $500 |
Why this is only an estimate: South Carolina's actual calculation applies each marginal bracket separately. The calculator uses one adjustable planning rate and does not claim to reproduce a state return.
See your South Carolina take-home pay
The calculator opens prefilled with a 3% mid-range approximation of South Carolina's graduated rates — adjust it to match your income level.
Open the paycheck calculator →What to verify before filing in South Carolina
Taxable-income starting point
Check whether the state starts from federal adjusted gross income or federal taxable income, then applies state additions and subtractions.
Deductions and credits
Confirm the current standard deduction, personal or dependent exemptions, refundable credits and any income-based phaseouts.
Local and special taxes
Check city or county income taxes, capital-gains rules, payroll assessments and taxes that apply to nonresidents or remote workers.
Retirement income
Review how the state treats Social Security, pensions, IRA withdrawals and military retirement benefits for your age and income.
South Carolina income tax FAQ
What are the South Carolina income tax brackets for 2026?
South Carolina uses graduated rates from 0% to 6% in 2026. The top 6% rate applies to single-filer taxable income above $18,230. South Carolina applies a 0% rate to the first slice of income, with the top 6% rate starting around $18,000.
What does "graduated" or "marginal" mean for my South Carolina taxes?
Like the federal system, only the income inside each bracket is taxed at that bracket's rate — crossing into a higher bracket never lowers your take-home pay. Your effective (average) rate is always below your top marginal rate.
What rate should I use to estimate South Carolina withholding?
A single flat approximation between 0% and 6% works for rough planning — the right number depends on your income level. Our prefilled paycheck calculator starts you at 3%, which you can adjust up or down.
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Researched and reviewed by: SmartRates Editorial Team · Tax data methodology · Last verified July 26, 2026
Sources: Tax Foundation — 2026 State Individual Income Tax Rates and Brackets and USA.gov — State tax agencies. Rates are state-level individual income tax figures for tax year 2026 and may exclude local income taxes, credits, deductions, and special regimes. Confirm with your state's revenue department or a tax professional before filing.