To sign up for Square’s online payroll services in South Carolina, you must be registered with the South Carolina Department of Revenue and Department of Employment and Workforce so we can pay and file your state taxes.

Agency Required Tax Information Format
South Carolina Department of Revenue South Carolina Withholding File Number XXXXXXXX-X (9 digits)
South Carolina Department of Employment and Workforce South Carolina UI Account Number XXXXXX (6 digits)
South Carolina Total Tax Rate X.XX%

South Carolina New Employer Registration

South Carolina Withholding File Number

  1. Register online as a new business.
  2. You should receive your Withholding File Number within 24 hours of registering online.

South Carolina UI Account Number

  1. Register online as a new business.
  2. You should receive your UI Account Number within 2-3 weeks after registering online.

South Carolina Total Tax Rate

Most new employers are assigned a Total Tax Rate of 1.23%. If you are unsure, contact the agency at (803) 737-2400, option 3.

Find Your South Carolina Tax ID Numbers and Rates

South Carolina Withholding File Number

  • You can find your Withholding File Number on any notices you’ve received from the SC Department of Revenue.
  • If you’re unable to locate this, contact the agency at (844) 898-8542, option 4 .

South Carolina UI Account Number

  • You can find your UI Account Number on any notices you’ve received from the Department of Employment and Workforce.
  • If you’re unsure, contact the agency at (803) 737-2400, option 3.

South Carolina Total Tax Rate

  • Your Total Tax Rate is the sum of your Unemployment Insurance Tax Rate and the Departmental Administrative Contingency Assessment (DACA).
  • You can find your Total Tax Rate on the Rate Notice sent by the Department of Employment and Workforce.
  • If you’re unsure, contact the agency at (803) 737-2400, option 3.

South Carolina Payroll Tax Details

Square Payroll processes the following per the frequency below to the listed state agencies:

Agency Filing Frequency
South Carolina Department of Revenue Withholding Tax Payment Per Pay Run
Withholding Tax Quarterly Return Quarterly
Annual Withholding Tax Report Annual
W-2 Reporting Annual
South Carolina Department of Employment and Workforce Quarterly UI Wage Report Quarterly
Quarterly UI Contribution Report Quarterly
South Carolina Department of Social Services New Hire Reporting Per New Employee

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