← USA Paycheck Calculator · South Carolina Paycheck Calculator

South Carolina Bonus Tax Calculator

Estimate take-home pay on a bonus, using the federal flat-rate supplemental withholding method

Estimate only — not tax advice. Federal tax on the bonus uses the flat 22% supplemental withholding rate (37% on cumulative supplemental wages over $1,000,000/year) — the alternative "aggregate method" some employers use instead is not modeled. FICA and any state SDI/PFL are computed as the difference between your regular income with and without the bonus added, so the Social Security wage cap applies correctly. State tax on the bonus is a marginal-bracket estimate, not necessarily any special state supplemental rate. See methodology below for source and last-verified date.

How South Carolina Paycheck Tax Is Calculated (2026)

Source: South Carolina Department of Revenue
Taxable income bracketRate
$0 – $30,0001.99%
$30,000 – +5.21%

Standard deduction (single): $15,000, subtracted from gross income before applying brackets.

state_tax = marginal_bracket_tax(gross_income - 15000, brackets)

Federal Tax & FICA (shared across all states)

Filing statusStandard deduction
Single$16,100
Married Filing Jointly$32,200
Head of Household$24,150
Federal brackets (all filing statuses)10% / 12% / 22% / 24% / 32% / 35% / 37%
Social Security6.2% up to $184,500 wage base
Medicare1.45% on all wages, +0.9% above $200,000 single/HoH, $250,000 MFJ

⚠️ South Carolina's married-filing-jointly and head-of-household state brackets have not yet been independently verified against the primary source above — this calculator uses South Carolina's single-filer brackets as an estimate when those statuses are selected.

Guideline version 2026-SC-v1 · Last verified 2026-07-26

South Carolina Paycheck Calculator FAQ

What are South Carolina's income tax brackets for 2026?

South Carolina uses 2 marginal brackets ranging from 1.99% to 5.21%.

How much is take-home pay on $65,000 in South Carolina?

On a $65,000 gross salary, a single filer in South Carolina takes home roughly $51,987/year (about $4,332.25/month) after federal tax, FICA, and state tax.

What deductions does South Carolina apply before taxing my income?

South Carolina applies a $15,000 standard deduction, before its marginal bracket schedule. See the "How South Carolina Paycheck Tax Is Calculated" section above for the exact formula.

Does this estimate change if I'm married or have dependents?

This calculator uses single-filer figures only (v1 scope). Married filing jointly typically uses different federal and South Carolina state brackets and a larger standard deduction — your actual take-home pay will differ. Dependents can also reduce federal withholding via the W-4. Check South Carolina Department of Revenue's married-filing-jointly tables for a precise figure.

Methodology & Source

South Carolina state tax figures sourced from South Carolina Department of Revenue (https://dor.sc.gov/), citing H.4216 (signed 2026-03-30) — 2-bracket overhaul, 1.99% under $30,000 / 5.21% above, decoupling from the federal standard deduction. Federal brackets, standard deductions (single/MFJ/HoH), and FICA constants sourced from the IRS (Revenue Procedure 2025-32; married-filing-jointly Additional Medicare threshold of $250,000 is a separate, unindexed statutory figure). South Carolina's married-filing-jointly and head-of-household figures are not yet independently verified and currently fall back to single-filer brackets — see the caveat in the formula section above.

Bonus federal withholding uses the flat supplemental-wage rate (22%, 37% above $1,000,000 cumulative supplemental wages/year), per IRS Publication 15 (Circular E), Employer's Tax Guide, 2026 edition — the alternative "aggregate method" is not modeled.

This is an estimate based on standard single-filer federal, FICA, and SC state calculations. Actual withholding may differ based on your W-4 elections, pre-tax deductions, and other factors. H.4216 replaces the federal standard deduction with a new "South Carolina Income Adjusted Deduction" (SCIAD) of $15,000 for single filers — but that amount phases out on a sliding scale between $40,000 and $95,000 of federal AGI (numerator = AGI over $40,000, denominator = $55,000). This estimate applies the full $15,000 regardless of income, which understates SC tax for filers in that phase-out band. Verify at dor.sc.gov for high-precision use.

Guideline version: 2026-SC-v1 · Effective: 2026-01-01 · Last verified: 2026-07-26