South Carolina Estimated Tax Facts
State Income Tax
Yes
Estimated Tax Form
Form SC1040ES
File When You Owe
$100+ in state tax
Self-Employment Tax Rate
15.3% (federal)
South Carolina Quarterly Tax Calculator for Gig Drivers
South Carolina has its own state income tax on top of federal self-employment tax. Get your exact quarterly estimated tax payment, effective rate, and recommended set-aside — free, in seconds.
Calculate Your South Carolina Quarterly Payment
$0
Quarterly Payment
$0
Annual Tax
0%
Effective Rate
0%
Set Aside / Payout
South Carolina Specific Tax Notes
- South Carolina reduced its top income tax rate to 6.4% (down from 7%)
- South Carolina has a very low threshold — estimated tax required if you owe $100+
- South Carolina standard deduction is $12,000 for single filers
- South Carolina follows federal quarterly payment deadlines
- Last reviewed: April 2026 — verify current rates at dor.sc.gov
Your South Carolina Kit: Forms, Reminders, Checklists
Q2 estimated payment due June 15. Get your South Carolina-specific forms, quarterly deadline reminders, mileage tracker, and a step-by-step action checklist.
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