California Capital Gains Tax: How to Keep More of Your Stock or Business Sale

The short answer

Sell a big winner in Los Angeles and the government can take 37 cents of every dollar of gain. That's 20% federal, 3.8% NIIT, and 13.3% to Sacramento.

You can't make the tax vanish. You can shrink it, delay it, or hand it to a charity or your heirs instead of the IRS. The tools: holding period, loss harvesting, charitable trusts, exchange funds, installment sales, QSBS, and the step-up at death.

The catch most national guides skip: California ignores several federal breaks. Every strategy below says whether the state plays along.

What a California investor actually pays in 2026

A top-bracket LA resident pays up to 37.1% on a long-term gain and up to 54.1% on a short-term gain. Those totals combine three separate taxes.

Federal brackets for 2026. For married couples filing jointly, the 0% rate applies to taxable income up to $98,900 and the 20% rate starts above $613,700. For single filers the 20% rate starts above $545,500 (Thomson Reuters, Rev. Proc. 2025-32 figures).

NIIT. The 3.8% tax applies to the lesser of your net investment income or your modified AGI above $250,000 (joint) or $200,000 (single). Those thresholds are not indexed for inflation (IRS).

California. The state has no capital gains rate. Gains are added to wages and other income and taxed on the regular schedule. The 13.3% top rate includes a 1% Mental Health Services Tax on taxable income above $1 million, created by Proposition 63 in 2004 (Legislative Analyst's Office; FTB bill analysis).

Example. A married LA couple sells $5 million of stock they bought for almost nothing. Most of that gain falls in the top brackets, so the marginal cost is about 37.1%, or about $1.85 million in combined federal and state tax. The strategies below are about shrinking that number.

Same gain, six very different tax bills

The choices you make before the sale matter more than the size of the gain. Here is the same $5 million gain under six scenarios.

Illustrative: $5M long-term gain, near-zero basis, married filing jointly, top marginal rates.

How each bar is built:

Sell within a year, in CA: federal ordinary rate of 37%, plus NIIT, plus California.

Sell after a year, in CA: the default for most investors, at 20% federal, 3.8% NIIT and 13.3% state.

Move out of CA, then sell: the federal 23.8% remains, but the state share disappears, if the move is genuine and happens before the sale.

QSBS, still in CA: federal tax and NIIT on qualifying gain are excluded, but California taxes the full amount.

QSBS after leaving CA: the one path to a true zero on a sale, and the most closely audited.

Donate, or hold for heirs: no one pays tax on the built-in gain, but you give up the cash (charity) or the chance to spend it (step-up).

One caveat cuts across every bar: these are marginal rates on a large gain. Your actual bill depends on your other income, deductions and the alternative minimum tax.

Selling public stock: four moves that work

1. Wait out the year (federal only). Hold more than one year and the federal rate drops from as high as 37% to 20% (IRS Topic 409). California doesn't care: it taxes short- and long-term gains the same. The federal savings alone can be 17 points.

2. Harvest losses, all year. Losses offset gains dollar for dollar, with no cap. Extra losses offset $3,000 of ordinary income a year and carry forward indefinitely (IRS Publication 550). Watch the wash-sale rule: rebuy the same or a substantially identical security within 30 days before or after and the loss is disallowed (SEC). Direct indexing automates this by owning the index's stocks individually, so there's almost always something to harvest.

3. Give stock, not cash. Donate shares held more than a year and you skip the gain entirely and deduct full market value, up to 30% of AGI for public charities and donor-advised funds, with a five-year carryforward (IRS Publication 526; Fidelity Charitable). New for 2026: itemizers lose the first 0.5% of AGI in charitable deductions, so bunch gifts into fewer years.

4. Don't sell at all: the step-up. Assets held until death get a new basis equal to market value, wiping out the built-in gain for heirs (26 U.S.C. § 1014). California is a community property state, so married couples can get a full step-up on both halves of community assets at the first death (IRS Publication 555). Title matters: joint tenancy is not community property. Borrowing against the portfolio instead of selling keeps this option alive.

Concentrated stock: diversify without the tax hit

Too much of your net worth in one ticker is a risk problem and a tax problem at once. These tools fix the first without triggering the second.

Exchange funds. Contribute your shares to a private partnership pooling many investors' stocks. Under Section 721 the contribution isn't a sale, so no tax is due going in (26 U.S.C. § 721). The price: a seven-year hold, at least 20% of the fund in illiquid assets like real estate, fees, and usually a $5 million investable-asset minimum (Wikipedia: Exchange fund). Your old low basis follows you out. It's deferral, not forgiveness.

Charitable remainder trust (CRT). Move the stock into a CRT, and the trust sells it tax-free. You receive 5% to 50% of trust value each year for life or a term of up to 20 years, and at least 10% of the starting value must be projected to reach charity (26 U.S.C. § 664; IRS: Charitable Remainder Trusts). You pay tax on distributions as they arrive, spread over decades, and take a partial charitable deduction up front.

Collars and variable prepaid forwards. Lock in a price range or take cash up front while keeping the shares. Tread carefully: hedge too tightly and Section 1259 treats it as a “constructive sale,” taxing you now (26 U.S.C. § 1259). Extending a prepaid forward can trigger the same result, as the McKelvey estate learned (EY summary of the Second Circuit ruling).

Staged selling. Sell in tranches across tax years, pairing each sale with harvested losses. Unglamorous, flexible, and often the backbone of every other strategy.

Selling a business: plan before the LOI, not after

Once a letter of intent is signed, most of these options close. Start 12 to 24 months out.

QSBS (Section 1202): huge federally, zero in California. Founders and early investors in qualifying C corporations can exclude gain from federal tax. For stock issued after July 4, 2025, the cap rose to $15 million, the company asset limit to $75 million, and partial exclusions now kick in after three and four years (Mintz; RS Capital). The California catch: the state has allowed no QSBS exclusion since 2013, so a $10 million federally tax-free exit can still cost over $1 million in state tax (Robert Hall & Associates).

Installment sale. Take payment over several years and recognize gain as cash arrives, spreading income across lower brackets (IRS Topic 705). It's also a buyer-financing tool. Risk: you become the buyer's lender. And moving away later rarely helps; California can keep taxing installment payments from a sale made while you lived here, so get state advice before you structure the deal.

ESOP sale with a Section 1042 rollover. Sell C-corp stock to an employee stock ownership plan that ends up owning at least 30% of the company, reinvest in qualified U.S. securities, and defer the gain, potentially until a step-up at death (Mercer Capital). S-corp owners must convert to C status first. California's treatment differs from federal; confirm it with a California CPA.

Charitable remainder trust before the sale. Transfer shares to a CRT before the deal is binding, and the trust sells them without immediate tax. Wait until terms are locked and the IRS can treat the gain as yours anyway.

Opportunity Zones: mind the 2026 dead zone. The OBBBA made the program permanent, with new zones effective January 1, 2027 (California GO-Biz). Gains invested under the old rules must be recognized December 31, 2026, so late-2026 investments get little benefit (Mondaq). California has not conformed to the federal OZ deferral, so state tax is due regardless.

The California rules that change the math

No long-term discount. Federal law rewards patience. California doesn't: a gain held ten years is taxed like a paycheck.

Federal breaks the state ignores. QSBS and the Opportunity Zone deferral cut your federal bill only. Model both returns before you count the savings.

Breaks the state honors. Charitable remainder trusts, the step-up at death, the community property double step-up, and loss harvesting all work at the state level too.

Moving is a real strategy, and the most audited one. Most stock-sale gains aren't taxed by California once you're truly a nonresident. But wages, RSUs and options earned here, and California real estate, stay California-source after you leave (Easy Reader). The Franchise Tax Board looks at domicile, not just days, and moves timed just before a liquidity event are a top audit trigger (FTB Publication 1031). If you're going, go early and cut ties completely.

Which strategy fits you?

Start with what you're selling. Each path has its own toolkit, and a residency change sits under all three.

Decision guide: 3 starting points, 12 strategies.

Most real plans combine two or three of these. A founder might use QSBS on part of the stock, a CRT for the rest, and harvest losses across the portfolio in the same year.

Every strategy at a glance

FAQ

What is the capital gains tax rate in California?

California taxes capital gains as ordinary income, from 1% to 13.3%. There is no separate or lower rate for long-term gains.

What's the highest combined rate for an LA investor?

About 37.1% on long-term gains (20% federal + 3.8% NIIT + 13.3% California) and about 54.1% on short-term gains.

Can I avoid capital gains tax completely?

Yes, in three ways: donate the asset to charity, hold it until death for a step-up in basis, or qualify for the federal QSBS exclusion. QSBS still leaves California tax due.

Does California follow the QSBS exclusion?

No. California has taxed QSBS gains in full since 2013.

Can I move out of California to avoid tax on a sale?

Often yes for stock gains, if you genuinely change domicile before the sale. Income earned from California work, and California real estate, stay taxable. Expect an audit if the move is close to the deal.

When should I start planning a business sale?

One to two years before a letter of intent. CRTs, QSBS structuring, and residency changes all need lead time.

Important Disclosures

Source: Gideon Strategic Partners, Important Disclosures (effective April 1, 2026).

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