What District of Columbia residents actually pay
District of Columbia taxes ordinary income at a top marginal rate of 10.75%. 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.
Top bracket kicks in at $1M.
The vest-day mechanics
On each vest date, shares settle at the closing price and the full value adds to W-2 wages. Your employer runs federal supplemental withholding at 22% (37% above $1M YTD supplemental) plus 10.75% state withholding at the District of Columbia top bracket, plus Medicare and Social Security up to the wage base.
Quarterly cadence
A typical four-year, quarterly-cliff RSU grant produces 16 vesting events. Each one is a supplemental-withholding event at the same statutory rates, which means your under-withholding gap compounds across the year if your marginal bracket is above 22%. Model it per tranche, not per year.
Three scheduled planning windows
Three times a year the math is worth re-running: after the Q1 vest (when you can see YTD withholding trajectory), before the Q3 vest (when you set up Q4 estimates or adjust W-4), and in December (final true-up plus the decision to hold or sell the year's accumulated shares).
Frequently asked
- Does District of Columbia tax RSU income the same as wages?
- Yes. District of Columbia treats RSU ordinary income as wages, taxable at the state's top marginal rate of 10.75%. 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 District of Columbia?
- District of Columbia 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 District of Columbia 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 District of Columbia move, expect the old state to tax the portion of each tranche attributable to workdays earned there. District of Columbia taxes the remainder.
- Can I reduce District of Columbia taxes by timing my RSU sales?
- District of Columbia 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 — District of Columbia
- ISO exercises and AMT — District of Columbia
- Capital gains tax — District of Columbia
- QSBS — District of Columbia
- Moving to or from District of Columbia with unvested equity: trailing nexus rules — District of Columbia
- ESPP taxation — District of Columbia
- NSO exercises and state tax — District of Columbia
- 401(k) and retirement accounts — District of Columbia
- Leaving District of Columbia: how to cleanly break residency before a liquidity event — District of Columbia
- District of Columbia equity-comp overview