South Carolina Quarterly Tax Calculator
Calculate your estimated quarterly tax payments for federal and South Carolina state taxes. Designed for self-employed individuals, freelancers, and independent contractors.
SC State Tax: Progressive 0.0% - 6.4%
Quarterly Payment Amount
$6,609
Per quarter (4 remaining)
Annual Tax Breakdown
2026 Payment Schedule
Jan 1 - Mar 31
Due: April 15, 2026
$6,609
Apr 1 - May 31
Due: June 15, 2026
$6,609
Jun 1 - Aug 31
Due: September 15, 2026
$6,609
Sep 1 - Dec 31
Due: January 15, 2027
$6,609
Don't miss your quarterly payments!
The IRS may charge penalties and interest if you underpay or pay late. Consider setting up automatic payments or calendar reminders.
South Carolina Quarterly Tax Highlights
South Carolina has 3 brackets: 0%, 3%, and 6.4%
First $3,460 is tax-free
Being phased to a flat tax
South Carolina Quarterly Tax FAQ
What is South Carolina's income tax rate?
South Carolina has a progressive income tax: 0% on first $3,460, 3% on income from $3,460 to $17,330, and 6.4% on income above that. The state is transitioning to a flat tax system.
Official References
This calculator uses current federal and South Carolina tax rates and schedules:
- IRS Estimated Tax Guidelines
Federal quarterly tax requirements and Form 1040-ES
- SC DOR
Official South Carolina tax authority
- IRS Self-Employment Tax
Social Security and Medicare tax information
This calculator provides estimates based on 2026 tax rates. Your actual tax liability may vary based on deductions, credits, and other factors. Consult a tax professional for personalized advice.