How does South Carolina state income tax and unemployment insurance work in 2026?

Plan for the trajectory. South Carolina ran a graduated system for years, then compressed it: the top marginal rate stepped from 6.2% in 2024 to 6% in 2025, and H.4216 reset the whole structure to two rates for 2026, with 5.21% at the top. Further reductions are written into the law, fired only when the Board of Economic Advisors projects revenue growth of 5% or more, and capped so a cut cannot cost the state more than 200 million dollars in a year.

For your employee, each step down is real take-home pay. For your finance team, the effective South Carolina withholding line drifts lower over time rather than holding flat, but your obligation does not. You still register for withholding with the South Carolina Department of Revenue, collect a signed SC W-4, remit on your assigned schedule, and reconcile annually. Compare the approach to how neighbouring states handle it: North Carolina state tax runs a flat 4.5% structure with no trigger mechanism. The rate changed here; the filing did not.

H.4216 reset the tables, so a payroll run that still uses the 2025 figures withholds the wrong amount. The South Carolina Department of Revenue publishes one set of withholding tables that bakes the 1.99% lower rate and the 5.21% top rate into the per-pay-period maths, after the allowances your employee claims on the SC W-4. Get the form on file and point the system at the 2026 tables, and regular-wage withholding runs correctly. Your wage and overtime obligations sit alongside this, as do your leave obligations.

Supplemental pay, such as a bonus paid separately, is the one area to confirm before you run it. The SCDOR reissued its withholding guidance for 2026, but the precise supplemental flat rate sits inside the WH-1603A instructions and is worth checking against the current document rather than carrying over a prior-year number. When in doubt, combine the bonus with the most recent regular wage payment and withhold on the total using the 2026 tables, then reconcile at year end.

South Carolina held its UI wage base flat at $14,000 for 2026, one of the lowest in the country. You pay UI on the first $14,000 of each employee's wages in the calendar year; everything above that is not taxed, so your per-head UI cost is capped tightly regardless of salary. Compare that cap to how Georgia's UI structure works next door: Georgia's wage base is set independently and reviewed each year by the Georgia Department of Labor.

You hold the 1.00% rate until you have been liable long enough to be experience-rated, after which the rate tracks your own layoff history within the 0.06% to 5.46% band. The federal layer sits on top: FUTA is 6.0 percent on the first $7,000 of wages, less the full state credit for compliant payers, leaving an effective 0.6%.

South Carolina has never enacted a state minimum wage, so the federal $7.25 floor governs under the Fair Labor Standards Act, and it allows the federal tip credit: a tipped employee may be paid a $2.13 cash wage as long as tips bring them to at least $7.25 an hour, with you covering any shortfall. There is no state overtime rule beyond the federal time-and-a-half after 40 hours in a week. For the full wages picture for your South Carolina hire, see South Carolina wage and overtime law.

On leave, South Carolina runs no state programme. There is no state paid family and medical leave fund and no state disability insurance, so the only job-protected family leave is federal FMLA, which gives eligible staff up to 12 weeks of unpaid leave at employers with 50 or more employees within 75 miles. For everything beyond that, paid time off is whatever you offer contractually. Read the full picture in South Carolina paid leave. The federal stack stays standard: Social Security at 6.2% to $184,500, 1.45% Medicare on all wages, and the 0.6% effective FUTA.

Real HR and legal experts handle your South Carolina hires and know the H.4216 two-rate reset, the $14,000 UI wage base, and the SC W-4 changeover by heart. An actual person, not a chatbot or a pooled queue. You see every cost: state withholding, UI contributions, and federal employer taxes pass through at cost, itemised and auditable on every invoice. No setup fee, no exit fee.

Contractor onboarding, EOR payroll, and entity graduation all live on one platform: a South Carolina contractor who converts to W-2 keeps their record, and that same employee can graduate to your own US entity without switching systems. Because the top rate is falling and the UI base is low, the cost case for your own entity tends to arrive later per headcount than in a high-tax state. Use the Crossover Calculator to see the month the model flips, or check your total employer cost before you commit. EOR is the right model for South Carolina, until it isn't. When the time comes, see South Carolina termination law for what offboarding obligations look like.