Neither State Offers a Long-Term Preference

At the federal level, long-term capital gains (assets held over one year) get preferential rates of 0%, 15%, or 20% depending on income. That distinction disappears at the state level in both California and New York. Both states tax capital gains as ordinary income, which means your long-term gain on that rental property or stock sale gets lumped in with your salary and freelance income when calculating your state tax bill.

This is a big deal. A New York City investor who sells $500,000 in appreciated stock after holding it for five years pays the same state and city rate as if that $500,000 were a year-end bonus. California does the same thing. The federal preference still applies, but at the state level, holding period makes zero difference.

Rate Comparison: CA vs. NY vs. NYC

The numbers are closer than most people assume. California tops out at 13.3% for income above $1 million (with a 1% mental health surcharge built in). New York State’s top rate is 10.9%, which kicks in at $25 million. But for NYC residents, you add the city’s 3.876% on top.

• California resident: up to 13.3% state tax on the gain
• New York State resident (outside NYC): up to 10.9% state tax
• New York City resident: up to 10.9% state + 3.876% city = 14.776% combined

For a NYC investor clearing a $2 million gain, the combined state-and-city tax bill lands around $295,000. The same gain in California costs roughly $266,000 at the state level. NYC is actually more expensive once you cross into the top brackets.

The Net Investment Income Tax Stacks on Top

Both California and New York investors also face the federal 3.8% Net Investment Income Tax (NIIT) on capital gains if their modified AGI exceeds $200,000 (single) or $250,000 (married filing jointly). This tax applies regardless of which state you live in, but it’s worth flagging because it pushes the all-in rate even higher.

A NYC resident in the top brackets pays roughly 20% federal long-term rate + 3.8% NIIT + 10.9% state + 3.876% city = about 38.6% total on a long-term capital gain. The same gain in California costs about 37.1% all-in. Both numbers are painful, but the NYC number is slightly worse.

Real Estate Capital Gains Differences

Selling property adds another layer. California imposes a withholding requirement on non-resident real estate sales (3.33% of the total sale price or the estimated gain, whichever is less). If you’re a New York resident selling California property, expect California to withhold a chunk at closing. You’ll claim it as a credit on your CA non-resident return, but that money is tied up for months.

New York doesn’t impose a similar withholding on non-resident property sales, though the estimated tax payment obligations still apply. NYC residents selling property within the five boroughs face the city’s Real Property Transfer Tax on top of capital gains tax, adding 1% to 2.625% depending on the sale price.

What NYC Residents Can Actually Do

Tax-loss harvesting is the most straightforward strategy and works equally well against both state returns. Selling losing positions to offset gains reduces your taxable capital gains dollar-for-dollar, subject to the $3,000 net loss limit against ordinary income.

Qualified Opportunity Zone investments can defer and partially reduce federal capital gains tax, though neither California nor New York conforms fully to the federal QOZ provisions. New York partially conforms; California does not conform at all, meaning the deferral only helps on your federal return if you invest through a CA-situs QOZ fund.

Relocating to a no-income-tax state before a large sale is the nuclear option. It works, but both California and New York are aggressive about auditing residency changes around large liquidity events. California’s Franchise Tax Board is particularly thorough. They track cell phone records, pet veterinary visits, and Amazon delivery addresses to prove you didn’t actually leave.