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Hawaii · nso state

NSO exercises and state tax in Hawaii

NSO spread is ordinary wage income at exercise; Hawaii takes 11% of that at the top bracket, plus its share of any later capital gain on sale.

What Hawaii residents actually pay

Hawaii taxes ordinary income at a top marginal rate of 11%. 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.

Long-term capital gains capped at 7.25% for higher earners.

Ordinary income at exercise

NSO spread (FMV minus strike at exercise, times shares) is ordinary wage income in the year of exercise. Hawaii taxes it at up to 11%, stacked on your base wages. Federal supplemental withholding applies at 22% (or 37%), just like RSUs.

Cash outlay vs tax

NSO exercise requires cash for the strike price plus tax withholding. Cashless exercise (same-day sell) nets out the cash requirement but converts the full spread to ordinary income in the exercise year. Early exercise with 83(b) is available on pre-vesting NSOs at some companies; it starts the long-term capital gain clock on the full share value going forward.

Interaction with later sales

After exercise, your basis equals strike plus spread (the amount taxed as ordinary). Further price appreciation is capital gain on sale, split long-term vs short-term at the one-year mark. For Hawaii residents, this is where the state savings from holding a preferential-treatment state matter most.

Frequently asked

Does Hawaii tax RSU income the same as wages?
Yes. Hawaii treats RSU ordinary income as wages, taxable at the state's top marginal rate of 11%. 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 Hawaii?
Hawaii 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 Hawaii 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 Hawaii move, expect the old state to tax the portion of each tranche attributable to workdays earned there. Hawaii taxes the remainder.
Can I reduce Hawaii taxes by timing my RSU sales?
Hawaii 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.

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