How the South Carolina model works
South Carolina uses progressive brackets in this model, so successive portions of modeled taxable income are charged at different marginal rates. The encoded deduction is $15,000 for a single filer and $30,000 for a married joint filer. The highest listed rate is not applied to all gross income.
Encoded single-filer schedule
| Single taxable income starts at | Marginal state rate |
|---|---|
| $0 | 2% |
| $30,000 | 5.2% |
$75,000 salary example in South Carolina
Assuming a single filer, the standard modeled deduction, no dependents, no local rate, and no voluntary deductions, annual gross pay of $75,000 produces estimated annual take-home pay of $58,935. That includes about $7,670 of federal income tax, $2,657 of South Carolina income tax, $4,650 of Social Security, and $1,088 of Medicare.
| Annual take-home | $58,935 |
|---|---|
| Monthly take-home | $4,911.29 |
| Biweekly take-home | $2,266.75 |
| Effective tax rate | 21.4% |
How income changes the estimate
The following fixed scenarios use the same 2026 single-filer assumptions so that the effect of the encoded South Carolina schedule can be compared without changing filing status or deductions.
| Gross salary | Modeled state tax | Total tax rate | Annual take-home | Monthly take-home |
|---|---|---|---|---|
| $40,000 | $498 | 15.4% | $33,823 | $2,818.54 |
| $75,000 | $2,657 | 21.4% | $58,935 | $4,911.29 |
| $125,000 | $5,547 | 27.1% | $91,157 | $7,596.42 |
South Carolina assumptions and local taxes
Act 110 of 2026 applies for tax years beginning after 2025. The calculator models the new SCIAD deduction and statutory income phaseout; credits are excluded. This page models full-year resident wages under the encoded progressive annual income-tax schedule. Credits, dependents, reciprocity, nonresident allocation, and employer withholding-certificate elections can change the final liability or the amount withheld from an individual paycheck.
The state estimate uses resident wage income and the dataset’s progressive schedule. It does not model credits, dependents, nonresident allocation, reciprocity, special deductions, or state withholding-certificate elections. The support record additionally identifies these exclusions: Employer withholding tables are not implemented.; Most state payroll deductions and insurance programs are not included.; Local taxes are excluded unless the user enters a known local rate.; Credits, dependents, reciprocity, and nonresident or part-year rules are not modeled.; Act 110 of 2026 applies for tax years beginning after 2025. The calculator models the new SCIAD deduction and statutory income phaseout; credits are excluded..
Source
South Carolina official tax authority · 2026 rate-and-bracket compilation · MyNetPay methodology.
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