What is South Carolina Individual Income Tax?
South Carolina Individual Income Tax is a simplified Income Tax structure, following the federal Income Tax laws.
How is it calculated?
- South Carolina accepts the adjustments, exemptions and deductions allowed on your federal tax return, with few modifications.
- Your federal taxable income is the starting point in determining your state Income Tax.
Individual Income Tax rates:
- 0 to a top rate of 6.2% for tax year 2024
- 0 to a top rate of 6.4% for tax year 2023
- 0 to a top rate of 6.5% for tax year 2022
- 0 to a top rate of 7% for tax years 2021 and prior
Tax brackets are adjusted annually for inflation. If you’re making 2025 Estimated Tax payments, the recently passed South Carolina budget reduces the top marginal Income Tax rate to 6% for Tax Year 2025, effective July 1, 2025. Taxpayers who are taxed at the top marginal rate may choose to adjust their 3rd quarter and 4th quarter estimated payments. Any overpayments will be returned to taxpayers as a refund when their return is filed.
Quick links
Resources
- Individual Income Tax Tips
- SC1040 Packet
- Request a payment plan
- SC Tax Credits
- Watch Individual Income Tax help videos on YouTube
- IIT FAQs
Security
Need help?
Phone: 1-844-898-8542
Email: IITax@dor.sc.gov
Additional resources
Did you receive an Identity Verification Notice?
You may receive a letter from the SCDOR asking you to complete either the Identity Verification Quiz or Individual Code Verification after filing your return. This is just another step we are taking to ensure that fraudsters are not using your information to file a false return and steal your refund.
Filing tips
Mailing addresses
Tax return mailing addresses are listed on the form. Please use the appropriate address, including the entire zip code.
| Refunds or no tax due (SC1040/SC1040NR) | All balances due | Estimated Tax (SC1040ES), Extension (SC4868) or Voucher (SC1040V) | Correspondence |
|---|---|---|---|
| SC1040 Processing Center PO Box 101100 Columbia, SC 29211-0100 | Taxable Processing Center PO Box 101105 Columbia, SC 29211-0105 | South Carolina Department of Revenue IIT Voucher PO Box 100123 Columbia, SC 29202 | South Carolina Department of Revenue Income Tax PO Box 125 Columbia, SC 29214-0400 |