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California · qsbs

QSBS in California: federal Section 1202 and state conformity

Whether California honors the federal QSBS gain exclusion on Section 1202 stock — and what it means for founders and early employees selling after five years.

What California residents actually pay

California taxes ordinary income at a top marginal rate of 13.3%. 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.

Calculates its own state AMT; one of the most expensive states for ISO exercise.

Federal Section 1202

Qualified Small Business Stock (QSBS) lets you exclude up to $10M or 10× your basis (whichever is greater) in federal capital gains on eligible C-corp stock held at least five years. The stock must have been acquired at original issuance from a company with under $50M in gross assets at the time.

California conformity

California conformity with federal QSBS rules varies year by year. California, for example, fully decouples and still taxes QSBS gain despite federal exclusion — a surprise for Bay Area founders on exit. Check current conformity before you file.

Frequently asked

Does California tax RSU income the same as wages?
Yes. California treats RSU ordinary income as wages, taxable at the state's top marginal rate of 13.3%. 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 California?
California calculates its own AMT on top of federal AMT, so large ISO exercises can trigger two AMT bills. Plan the disqualifying-vs-qualifying disposition decision with both layers in mind.
I moved to California 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 California move, expect the old state to tax the portion of each tranche attributable to workdays earned there. California taxes the remainder.
Can I reduce California taxes by timing my RSU sales?
California 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.

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