What's the tax on a $20,000,000 long-term capital gain in California?

Approximately $7,405,830 total. Federal LTCG: $3,985,830. NIIT at 3.8%: $760,000. California state tax: $2,660,000.

Short-term vs long-term?

If the same $20,000,000 gain were short-term (held under 12 months), it would be taxed as ordinary income at up to 37% federal plus state, coming to approximately $10,812,457. That's $3,406,627 more than the long-term number. Holding past the 12-month mark usually saves meaningful money.

Does California tax capital gains the same as ordinary income?

Yes. California taxes long-term capital gains at ordinary income rates, up to 13.3%. There is no state-level preference for long-term treatment.

If the gain is on Qualified Small Business Stock held more than five years, up to the greater of $10M or 10× basis may be excluded from federal tax under IRC §1202. California does NOT conform to QSBS, so state tax applies to the full gain.

How much tax on a $20,000,000 capital gain in California?

Long-term vs short-term

A long-term capital gain (held 12+ months past the basis-setting event) gets preferential federal rates: 0%, 15%, or 20% depending on total taxable income, plus 3.8% NIIT for MAGI above $200k single. Short-term gains are taxed at ordinary rates up to 37% federally, plus state. For this $20,000,000 gain, the short-term total would run approximately $10,812,457, compared with $7,405,830 long-term. The difference is roughly $3,406,627.

California's treatment

California taxes long-term gains at ordinary income rates. At the top bracket, that's 13.3%. No state preference for long holding periods.

Cost basis considerations

For RSU shares, basis equals the vest-date closing price. For ISO shares (qualifying disposition), basis equals strike plus any ordinary-income component at exercise. For ESPP shares, basis depends on whether the sale is a qualifying or disqualifying disposition. These basis rules materially affect whether a reported gross sale amount is mostly gain or mostly return of basis.

Frequently asked

What's the tax on a $20,000,000 long-term capital gain in California?: Approximately $7,405,830 total. Federal LTCG: $3,985,830. NIIT at 3.8%: $760,000. California state tax: $2,660,000.
Short-term vs long-term?: If the same $20,000,000 gain were short-term (held under 12 months), it would be taxed as ordinary income at up to 37% federal plus state, coming to approximately $10,812,457. That's $3,406,627 more than the long-term number. Holding past the 12-month mark usually saves meaningful money.
Does California tax capital gains the same as ordinary income?: Yes. California taxes long-term capital gains at ordinary income rates, up to 13.3%. There is no state-level preference for long-term treatment.
What about QSBS?: If the gain is on Qualified Small Business Stock held more than five years, up to the greater of $10M or 10× basis may be excluded from federal tax under IRC §1202. California does NOT conform to QSBS, so state tax applies to the full gain.

Educational estimate · 2025 brackets · Single filer · Long-term hold · $250k other ordinary income · Not tax advice

Long-term vs short-term

California's treatment

Cost basis considerations

Frequently asked

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