409A Valuation for California Startups

How this page fits with our other guides: This is our California hub. It covers only what is specific to the state. For what a 409A is and how it works, start with what is a 409A valuation. For prices, see our 409A valuation cost guide. We link to those pages rather than repeat them.

Do California startups need a 409A valuation?

Yes, if they grant stock options or other equity rights to employees, advisors or contractors. Section 409A is federal law, so the requirement is identical in every state. A California startup that prices options below the fair market value of its common stock exposes holders to federal penalties plus a separate 5% California tax.

Strictly, Section 409A does not order any company to buy a valuation. It requires that a stock option's exercise price never be less than the fair market value of the underlying stock on the grant date, or the option is treated as deferred compensation. The valuation is how a private company proves that value. A report from a qualified independent appraiser, if it is no more than 12 months old and nothing material has changed since, is presumed reasonable, and the IRS must then show it was grossly unreasonable to challenge it. Our 409A safe harbor guide covers the three ways to earn that presumption.

Nothing in that framework is California-specific. A 409A valuation in the US is the same deliverable whether the company is in San Francisco, Austin or Boston, built on the same AICPA guidance and the same three approaches. California founders searching for a "California 409A valuation" are not looking for a different kind of report. They are looking for a provider who understands what the state's tax and securities rules do to the people holding the options, which is what the rest of this guide covers.

Why California is the largest 409A market

California companies have raised roughly half of all US venture capital in most recent years, and an even larger share of the largest AI rounds. Every one of those financings resets the price of preferred stock and, in most cases, calls for a fresh 409A valuation before the next option grant. California startups also tend to grant options broadly: equity is a standard part of offers for engineers, not just founders and executives.

State law reinforces that. California voids most employee non-compete agreements under Business and Professions Code Section 16600, so companies cannot contractually stop staff leaving for a competitor. Vesting equity carries more of the retention load as a result, which means more grants, more refresh grants, and more 409A valuations per company than in many other states.

The volume has a practical consequence: auditors, venture investors and acquirers in California review a lot of 409A reports, and they know what a defensible one looks like. A thin report, a stale one, or a strike price that ignores a recent priced round is more likely to be noticed in due diligence here than almost anywhere else.

California tax rules that raise the stakes of a 409A valuation

The valuation itself is federal. The consequences for employees are partly state. Five California rules make an accurate, current 409A valuation in California worth more than the same report elsewhere:

• A 5% state additional tax on 409A failures. California Revenue and Taxation Code Section 17508.2 adds a 5% tax on compensation included in income because a plan fails Section 409A. It was 20% until California cut it for tax years beginning in 2013. It sits on top of the federal 20% additional tax and premium interest. Our 409A penalties guide shows how the federal amounts are calculated.
• Ordinary-income rates on gains. California taxes capital gains at the same rates as wages, up to 13.3% for the highest incomes including the 1% surcharge on taxable income over $1 million. There is no lower rate for long-term gains.
• No QSBS conformity. California does not follow the federal exclusion for qualified small business stock under Section 1202. A founder who sells shares tax-free federally still owes California tax on the full gain.
• California AMT on ISOs. The spread on exercising an incentive stock option, fair market value at exercise minus the strike price, is an adjustment for California's alternative minimum tax as well as the federal one. The fair market value used at exercise is normally the company's current 409A value.
• Withholding on NSO spreads. When an employee exercises a nonqualified option, the spread is wages. California's supplemental withholding rate for stock options and bonuses is 10.23%, and the spread is also subject to State Disability Insurance, which has had no wage cap since 2024.

Put together, a California employee holding a mispriced option can face regular federal and state income tax on vested amounts before they are paid, plus a 25% combined federal and state additional tax, plus premium interest. That is the reason California boards tend to be conservative about valuation dates: they would rather order a new report a month early than grant on a stale one.

How much does a 409A valuation cost in California?

About the same as a 409A valuation in the US generally. A California report is priced on company stage and capital structure complexity, not on location. Seed-stage reports from online and boutique providers generally cost a few hundred to a few thousand dollars; late-stage companies with complex preferred stacks can pay much more.

Where California does show up in price is with local firms. Bay Area and Los Angeles valuation practices carry California overheads, and some charge a premium for in-person meetings. Remote providers deliver the same federal-standard report without that cost, which is why most California seed and Series A companies now buy their 409A online. For current price ranges by stage and provider type, see our 409A valuation cost guide; we do not repeat those tables here.

What does vary with California companies is how often you pay. Frequent financings, active secondary markets for later-stage Bay Area shares, and fast revenue growth all create material events. A company that raises twice in a year may need three or four valuations in that year, so the per-report price matters less than the total annual cost.

California regions and what drives their 409A valuations

The method does not change across the state, but the industry mix does, and industry decides which approach carries the most weight and which inputs need the closest support. The table below summarizes the main California startup regions.

A few patterns stand out. Bay Area companies raise priced rounds often enough that the backsolve method usually anchors the value, and the key judgments are about how much of the preferred price belongs to rights the common stock does not have. San Diego biotech valuations turn on milestone probabilities, covered in our 409A guide for biotech startups. AI companies, wherever they are based, raise questions about volatility and compute-heavy cost structures that we address in our 409A guide for AI startups.

California securities law and your option plan: Section 25102(o)

Granting an option is an offer of a security, so a company needs an exemption from registration under both federal and state law. Federally, most private companies rely on SEC Rule 701. In California, the usual exemption is Corporations Code Section 25102(o), which applies to options and stock issued under a written compensatory plan to residents of California, whether or not the company is incorporated or headquartered there.

The exemption comes with conditions, set out mainly in Section 25102(o) and the Department of Financial Protection and Innovation's Rule 260.140.41. In outline:

• Plan terms. The plan must meet requirements on option term, post-termination exercise periods, transferability and shareholder approval of the plan within 12 months before or after adoption.
• Notice filing. The company files a notice with the DFPI, with a fee, no later than 30 days after the first issuance of a security under the plan to a California resident.
• Information to holders. The company must provide option holders with financial information, subject to exceptions, including one tied to compliance with federal Rule 701.

Two points matter for the valuation. First, 25102(o) and the 409A rules are separate tests: meeting one does not satisfy the other. The fair market value floor on strike prices comes from federal law, Section 409A and, for ISOs, Section 422. Second, a late 25102(o) notice can often be remedied with counsel's help, while an option granted below fair market value generally cannot be corrected once it vests. Corporate counsel handles the filing; the 409A valuation is what lets the board document that the strike price was right.

Employees who move into or out of California

California taxes option income earned while working in the state, even after the employee leaves. Under the Franchise Tax Board's approach, described in its Publication 1004, stock option income is allocated to California based on the share of workdays spent in California between the grant date and the exercise date (or the date employment ended, if earlier). An engineer who earned an option in San Jose and exercised it after moving to Texas can still owe California tax on part of the spread.

ISOs add another layer. A qualifying sale is generally taxed by the state where the employee lives when they sell, while a disqualifying disposition produces wage income that California can source on the workday basis above. Add California AMT and AMT credits, and the rules get complicated quickly; employees in that position need their own tax advisor.

For the company, the 409A valuation feeds directly into these calculations. The fair market value at exercise is what payroll uses to compute the NSO spread and California withholding, and what employees use for AMT. Keeping a current, well-documented 409A in place, and recording which valuation applied to each exercise, makes multi-state payroll and employee tax filings much easier to support.

Does a California startup need a California-based 409A provider?

No. California does not require a state license to perform business valuations, and the 409A safe harbor depends on the appraiser's qualifications and independence, not their address. A remote provider that applies the federal standard and AICPA guidance produces a report that is equally valid for a California company. Local knowledge helps mainly with comparables and investor expectations.

What to check instead is the same list any company should use: the credentials of the person signing the report (such as ASA, ABV, CFA or CVA), whether they are independent of the company, how they handle your specific capital structure, and how quickly they can deliver when a round closes. Our step-by-step guide on how to get a 409A valuation covers the questions to ask before signing and the documents to prepare.

If your company is a California LLC rather than a corporation, the first question is different: which valuation does the entity need at all? Our guide on whether LLCs need a 409A valuation sorts that out.

RSUs, early exercise and QSBS for California employees

Many later-stage California companies grant restricted stock units instead of, or alongside, options. RSUs have no strike price, but the 409A value still matters: it sets the income recognized and the withholding due when private-company RSUs settle, and double-trigger RSU plans must be drafted to fit a Section 409A exemption or comply with its payment-timing rules. Our guide to 409A valuations for RSUs and restricted stock explains how.

Early exercise is common in California seed-stage companies, because a low 409A value makes it cheap to buy shares early and file an 83(b) election. Exercising when the 409A value equals the strike price leaves no spread, so no federal or California AMT on that exercise and no ordinary income for NSOs. It also starts the capital gains holding period and, for stock that qualifies, the federal QSBS holding period. Our guide to AMT and early exercise walks through the trade-offs.

The QSBS benefit is federal only. For stock issued after July 4, 2025, federal law excludes 50% of the gain after three years, 75% after four and 100% after five, up to a per-issuer cap of the greater of $15 million or ten times basis, for companies with gross assets up to $75 million when the stock is issued. California taxes the whole gain as ordinary income regardless. California employees planning around QSBS should model the state tax separately rather than assume the exclusion carries through.

The Bottom Line on a 409A Valuation in California

A 409A valuation in California is the same federal report every US startup needs, prepared to the same standard. The difference is what rides on it. California's 5% additional tax, its ordinary-income treatment of gains, its refusal to follow QSBS, its own AMT on ISOs, and its reach over employees who move away all magnify the cost of a strike price that cannot be supported.

The practical routine does not change: get an independent valuation before the first grant, refresh it at least every 12 months and after every material event, keep your 25102(o) filing current, and record which valuation supported each grant and exercise. California companies that keep that discipline give their employees the full value of their equity, and give acquirers nothing to argue about in diligence.

This article is general information about 409A valuations for California companies, not legal, tax or accounting advice. Federal and California tax rules change, and their application depends on each company's and employee's facts, including residency and work location. California securities law requirements for option plans should be confirmed with corporate counsel. Consult your own legal and tax advisors before granting equity or exercising options.