Use this calculator to find your exact quarterly estimated tax payments as a freelancer in South Carolina. Enter your details below for an instant result.
From W-2 Box 2
Used to calculate safe harbor quarterly amount
The Qualified Business Income (QBI) deduction lets most self-employed individuals deduct 20% of net business income from taxable income. Phases out for higher earners.
SC top rate reducing annually (7.0% → 6.5% → 6.4% → 6.3% → ... → 6.0% target). Verify exact 2025/2026 top rate vs SC DOR. SC standard deduction conforms to federal. VERY low threshold: $100 — nearly all SC SE earners must pay quarterly.
South Carolina estimated tax payments are due: Q1 on April 15, Q2 on June 15, Q3 on September 15, and Q4 on January 15.
In South Carolina, quarterly state estimated tax payments are required when your expected state income tax liability exceeds $100 for the year.
Yes. Federal self-employment tax applies regardless of state. As a freelancer in South Carolina, you owe 15.3% SE tax on 92.35% of your net self-employment income — 12.4% Social Security (up to the annual wage base) and 2.9% Medicare. You deduct half from federal AGI.
Pay South Carolina estimated taxes online at the Department of Revenue portal. SC top rate reducing annually (7.0% → 6.5% → 6.4% → 6.3% → ... → 6.0% target). Verify exact 2025/2026 top rate vs SC DOR. SC standard deduction conforms to federal. VERY low threshold: $100 — nearly all SC SE earners must pay quarterly.
This tool is for informational and educational reference only and does not constitute tax or financial advice. Tax laws are complex, change annually, and individual circumstances vary. Calculations are estimates based on the inputs you provide and IRS/state tax authority data. Always consult a licensed CPA or tax professional before making tax decisions.