South Carolina does not ask whether you are married. Its withholding has no filing status in it at all: one bracket schedule for everybody, and the only thing you control is how many allowances you claim on Form SC W-4. The first of those allowances is worth more than twice what the second one is, and the reason is worth a minute.
On a $75,000 salary with one allowance, a filer keeps about $58,499, after $3,094 of South Carolina income tax.
Claiming nothing costs you twice
Each allowance takes $5,000 a year off your wages. That is generous on its own. But South Carolina also gives a standard deduction of 10% of your gross wages, capped at $7,500, and you only get it if you claim at least one allowance.
| Allowances on your SC W-4 | Sheltered on a $60,000 salary | What the step is worth |
|---|---|---|
| 0 | $0 | — |
| 1 | $11,000 | $660 a year |
| 2 | $16,000 | $300 |
| 3 | $21,000 | $300 |
So a zero on that form is an expensive answer in South Carolina. It does not just forgo $5,000 of exemption, it switches off the standard deduction as well, and on a $60,000 salary that combination costs $660 a year against claiming one. People put a zero there deliberately, to be withheld conservatively and get a bigger refund. That is a legitimate choice, but in this state it is a much larger over-withholding than the same choice would be anywhere else.
The deduction’s percentage form has a second consequence. Because it is 10% of your pay rather than a fixed sum, it grows with your salary until the $7,500 cap catches it, which happens at exactly $75,000 of wages. Below that, a raise brings a slightly larger shelter with it. Above it, the shelter stops moving.
Three bands, and the first one is zero
| Taxable income | Rate |
|---|---|
| First $3,640 | nothing |
| $3,640 to $18,230 | 3% |
| Over $18,230 | 6% |
Two bands and a zero band is about as simple as a graduated tax gets, and because everything above $18,230 is 6%, most full time workers are paying 6% on the bulk of their taxable income. The useful part is how much income never becomes taxable: on $60,000 with one allowance, $11,000 is sheltered and the first $3,640 after that is free, so nearly a quarter of the salary is untaxed by the state before the 3% band even starts.
Your filing status is a worksheet step, not an input
Form SC W-4 does ask your status, which makes the absence confusing. It uses it only to help you work out how many allowances to claim. Once that number is on the form, the status is finished: the schedule, the deduction and the tables are keyed to pay period and allowance count and nothing else.
That means two people on identical salaries with identical allowance counts are withheld identically in South Carolina, whatever their circumstances. If yours looks different from a colleague’s, the allowance number is the only place to look.
What else comes out
Nothing, at state level. South Carolina has no disability contribution, no paid family leave contribution and no local wage taxes. Unemployment insurance is run by the Department of Employment and Workforce as an employer tax.
- Federal income tax, about $7,670 on $75,000, which your W-4 controls.
- Social Security and Medicare, $5,738. A flat 7.65%.
- South Carolina income tax, about $3,094 with one allowance.
So the state line is the only one you can move, and the SC W-4 is the only way to move it. Every line on a pay stub covers what the rest of the abbreviations mean.
South Carolina paycheck calculator FAQ
At least one, in almost every case. South Carolina’s standard deduction of 10% of wages, capped at $7,500, is only given to someone claiming one or more allowances, so a zero forfeits both the $5,000 allowance and the deduction. On a $60,000 salary that choice costs about $660 a year.
No. The withholding schedule and tables are keyed to your pay period and your number of allowances only. Form SC W-4 asks your status purely to help you work out that number, and the status itself never enters the calculation.
Nothing on the first $3,640 of taxable income, 3% from there to $18,230, and 6% above that. Taxable income means your wages after the allowances and the standard deduction, which on a modest salary is a long way below your gross pay.
It is 10% of your gross wages rather than a fixed amount, capped at $7,500, and it only applies if you claim at least one allowance. Because it is a percentage, it grows with your pay until the cap catches it at $75,000 of wages.