What Mississippi residents actually pay
Mississippi taxes ordinary income at a top marginal rate of 4.4%. 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.
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 Mississippi taxes at up to 4.4%. The second is capital gain or loss on sale, taxed at long- or short-term rates federally and at 4.4% if held as ordinary state income.
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 Mississippi still costs 4.4% 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 Mississippi tax RSU income the same as wages?
- Yes. Mississippi treats RSU ordinary income as wages, taxable at the state's top marginal rate of 4.4%. 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 Mississippi?
- Mississippi 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 Mississippi 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 Mississippi move, expect the old state to tax the portion of each tranche attributable to workdays earned there. Mississippi taxes the remainder.
- Can I reduce Mississippi taxes by timing my RSU sales?
- Mississippi taxes long-term capital gains at the same rate as ordinary income, so timing alone does not produce a state savings — only federal. Holding for 12 months still halves the federal rate on gains above basis.
Related
- RSU taxes — Mississippi
- ISO exercises and AMT — Mississippi
- Capital gains tax — Mississippi
- QSBS — Mississippi
- Moving to or from Mississippi with unvested equity: trailing nexus rules — Mississippi
- RSU vesting schedules — Mississippi
- NSO exercises and state tax — Mississippi
- 401(k) and retirement accounts — Mississippi
- Leaving Mississippi: how to cleanly break residency before a liquidity event — Mississippi
- Mississippi equity-comp overview