W-4 Calculator · South Carolina

South Carolina W-4 Calculator 2026

Work out your federal W-4 withholding for 2026, then see what South Carolina needs for state withholding.

Data verified November 10, 2026 against official sources (see below).

Filing Status

Annual Gross Income

Federal Tax Already Withheld This Year

Federal Tax Per Paycheck Right Now

Pay Frequency

Paychecks Left This Year (26)

Children Under 17

Goal At Filing Time

Estimated federal liability

$5,620

After standard deduction + Child Tax Credit

On track for

$6,500

~$880 refund if nothing changes

W-4 Step 3 (dependents)

Enter this on Step 3 if not already on your W-4

South Carolina state withholding

South Carolina has its own withholding certificate: Form SC W-4 (South Carolina Employee's Withholding Allowance Certificate). The federal W-4 dropped allowances in 2020, but South Carolina still uses its own form, so filling only the federal W-4 can leave your state withholding off.

What is new on the 2026 W-4

The 2026 Form W-4 adds a Deductions Worksheet covering new above-the-line deductions created for 2025-2028: qualified tips (up to $25,000), the overtime premium portion of time-and-a-half pay (up to $12,500 single / $25,000 joint), passenger vehicle loan interest (up to $10,000), and a $6,000 deduction for seniors 65+. Each has its own income cap. Entering what you qualify for on Step 4(b) reduces withholding so you are not lending the money to the IRS all year.

W-4 in other states

Sources and how we calculate

Published by Financial Calculator. Editorial policy. Publisher attribution, not a claim of professional review.

The estimator assumes a W-2 wage earner with the standard deduction. Multiple jobs, self-employment income, and itemized deductions change the right withholding — the IRS Tax Withholding Estimator covers those cases.

Figures last checked on November 10, 2026. Read our calculation methodology for data sources and update schedule.

How We Calculate & Keep This Accurate

We estimate your 2026 federal liability from income, filing status and the Child Tax Credit, project what your current paychecks will withhold by year-end, and split any gap across your remaining paychecks. That gap is the W-4 Step 4(c) extra-withholding amount.

Published by Financial Calculator. Editorial policy. No named professional review is implied.

Primary Sources

Data & Freshness

Figures reflect 2026 tax-year data.

Last updated November 10, 2026 · Maintained by the Financial Calculator editorial team.

Read our calculation methodology.

South Carolina W-4 FAQs

Common W-4 and withholding questions for South Carolina employees in 2026.

Do I need a separate South Carolina withholding form?

Yes — South Carolina uses its own form, Form SC W-4 (South Carolina Employee's Withholding Allowance Certificate). The federal W-4 no longer uses allowances, but South Carolina's form still sets your state allowances, so filing both keeps your state withholding accurate.

What is W-4 Step 4(c)?

Step 4(c) is the box for extra withholding per paycheck. If your estimated annual tax is more than what your paychecks will cover, dividing the shortfall by your remaining paychecks gives the extra amount to enter there.

What changed on the 2026 W-4?

The 2026 W-4 adds a Deductions Worksheet for new above-the-line deductions: qualified tips (up to $25,000), overtime premium pay (up to $12,500 single / $25,000 joint), passenger vehicle loan interest (up to $10,000), and a $6,000 senior deduction — each with its own income cap. Entering these on Step 4(b) lowers your withholding to match.

How much should I have withheld?

Enough to cover your estimated annual liability, unless you prefer a refund cushion. Owing more than $1,000 at filing can trigger an underpayment penalty, so breaking even means matching withholding to liability, not minimizing it.