South Carolina Employer Tax Information
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) or XXXXXXXX (8 digits) | South Carolina Total Tax Rate | X.XX% |
South Carolina New Employer Registration
South Carolina Withholding File Number
Register online as a new business. You should receive your Withholding File Number within 24 hours of registering online.
South Carolina UI Account Number
Register online as a new business. You should receive your UI Account Number within 2-3 weeks after registering online.
South Carolina Total Tax Rate
If you are unsure of your rate, contact the agency at (803) 737-2400, and choose option 3. You can also see additional information below on how to locate your rate.
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 |