What South Carolina residents actually pay
South Carolina taxes ordinary income at a top marginal rate of 6.2%. RSU settlement value, NSO exercise spread, and ESPP discount income all count as ordinary wages for this purpose and flow through the state's normal brackets.
44% long-term cap-gains exclusion.
Two taxable events, one plan
An ESPP produces two taxable events. The first is ordinary discount income at purchase (for non-qualified plans or disqualifying dispositions of qualified plans), which South Carolina taxes at up to 6.2%. The second is capital gain or loss on sale, taxed at long- or short-term rates federally and at a preferential state rate.
Qualifying disposition math
A qualifying disposition requires you hold the shares two years from offering date and one year from purchase. Holding that long converts some of the gain to long-term federal capital gains, which for a high earner in South Carolina still costs 6.2% state plus federal LTCG rates. The trade-off: two years of concentration risk in your employer's stock.
Payroll reporting
Discount income at purchase flows through W-2 Box 1 and is withheld on payroll. The cost basis reported on Form 1099-B usually excludes the W-2 income component, so you must adjust on Form 8949 to avoid double-taxation. This is the most common ESPP filing error.
Frequently asked
- Does South Carolina tax RSU income the same as wages?
- Yes. South Carolina treats RSU ordinary income as wages, taxable at the state's top marginal rate of 6.2%. Supplemental-wage federal withholding (22%, or 37% above $1M YTD) does not adjust for state withholding, so you often owe extra at filing.
- What happens if I exercise ISOs while living in South Carolina?
- South Carolina does not run a separate state AMT, so only federal AMT applies. You still need to model the bargain element carefully if you plan a cashless exercise-and-sell.
- I moved to South Carolina from another state. Who taxes my vesting RSUs?
- Most high-tax states (CA, NY, MA) source RSU ordinary income to workdays between grant and vest. If your grant pre-dates your South Carolina move, expect the old state to tax the portion of each tranche attributable to workdays earned there. South Carolina taxes the remainder.
- Can I reduce South Carolina taxes by timing my RSU sales?
- South Carolina gives preferential treatment to long-term capital gains. Holding RSU shares 12+ months past vest can produce both federal and state savings. Weigh concentration risk before using this as a reason to hold.
Related
- RSU taxes — South Carolina
- ISO exercises and AMT — South Carolina
- Capital gains tax — South Carolina
- QSBS — South Carolina
- Moving to or from South Carolina with unvested equity: trailing nexus rules — South Carolina
- RSU vesting schedules — South Carolina
- NSO exercises and state tax — South Carolina
- 401(k) and retirement accounts — South Carolina
- Leaving South Carolina: how to cleanly break residency before a liquidity event — South Carolina
- South Carolina equity-comp overview