Picture a Rancho Cucamonga S corporation with two lines of business. Its trucks haul California freight, and a separate operation distributes in Nevada. A buyer wants the Nevada line. Can California tax part of the gain on a business that never sold anything here?
It depends on whether the Nevada line is part of one unitary business with the trucking company. If it is, the gain is apportioned and California takes its percentage. If it is a separate trade or business, California may get nothing. A June 2026 Office of Tax Appeals opinion sided with a taxpayer on this question, and the winning evidence was mostly accounting evidence.
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North Star Tax and Legal Briefing: Selling an S Corporation Division: California's Unitary Test After Western Distributing
A five-minute briefing on how California's unitary business test decides whether the state can tax the gain on a division sold to an out-of-state buyer, what the Western Distributing decision turned on, and the division-level books that protect a separate-business position.
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Picture a Rancho Cucamonga S corporation with two lines of business. Its trucks haul freight inside California. A separate operation distributes product in Nevada, and a buyer wants that Nevada line. Here is the question that decides the tax bill: can California tax the gain on a business that never sold a single thing here? Your instinct says no. The Franchise Tax Board’s instinct says yes, and it has a legal theory, the unitary business, that gets it there more often than owners expect. A June two thousand twenty-six decision from California’s Office of Tax Appeals went the other way, and the evidence that won it was mostly accounting evidence.
California does not ask where a sale closed. It asks whether the thing you sold was part of one unitary business with everything else you run. If it was, the gain is business income, and California applies your sales factor and takes its percentage. If the line you sold was a separate trade or business with no California customers, the state may get nothing at all. Two tests decide it. The first looks for three unities: common ownership, central operations like shared purchasing, accounting, and payroll, and a centralized executive force that actually runs the lines. The second asks whether the California operation depends on, or contributes to, the out-of-state one. Meet either test and you are unitary. One more trap. Calling the gain nonbusiness income does not get you out, because California sends nonbusiness gain on goodwill to the company’s home base, and for a company managed from Rancho Cucamonga, that home base is here.
Western Distributing was a Denver-based S corporation with fourteen divisions. The two big ones were a Colorado beer distributor and an interstate trucking business that picked up and delivered in California. In two thousand ten the company sold the beverage division, mostly distribution rights, for about sixty-eight million dollars of gain, and reported all of it as Colorado income. The F T B said all fourteen divisions were one unitary business and wanted California’s share. The appeals panel disagreed, but not completely. On unity of operation, the F T B won: one primary insurance policy, centralized payroll and benefits, exactly the shared back office that points toward one business. The taxpayer won anyway on the other two prongs. Division managers made their own hiring and purchasing decisions, and part of their pay tracked their own division. Hauling between divisions was billed at standard rates and came to less than one percent of trucking revenue. The controlling owner was off racing professionally rather than running the lines. No unity of use, no dependency, no contribution. Separate business. Notice the label did not save them. The company had called the gain nonbusiness income, conceded on appeal that it was business income, and the panel called the original reporting erroneous. They won on the evidence, not the category.
Put numbers on it. Say your Rancho Cucamonga company sells its Nevada line for a twelve million dollar gain, ten million of it goodwill and customer contracts, and the combined business has a forty percent California sales factor. If unitary, four million eight hundred thousand dollars of gain lands in California, and the entity tax at one and a half percent is seventy-two thousand dollars. A Nevada resident who owns thirty percent picks up one million four hundred forty thousand dollars of California-source income, roughly one hundred seventy-two thousand dollars in tax. If separate, neither level pays California tax on that gain. And the nonbusiness route backfires: ten million of intangible gain goes straight to the California domicile, a one hundred fifty thousand dollar entity tax. Expect the fight to take years. Western Distributing sold in two thousand ten, was assessed in two thousand sixteen, and got its answer in two thousand twenty-six.
Three things to do this week if a division sale is anywhere on the horizon. First, give each line its own ledger, its own bank accounts, and its own financing, and bill any work between the lines at market rates. A separate L L C by itself will not do it; the courts look past corporate form to how the business actually ran. Second, before you switch a division to separate treatment, recompute every open year both ways, because the F T B’s fallback argument is that deductions you took as one business should come back. Third, build the deal on the same division-level books you will need for the purchase price allocation with the I R S, so one set of records serves both agencies. That’s what we do at North Star Law Firm. The initial consultation is free, and the full written analysis with citations is at C A dash legal dot net.
What did the Office of Tax Appeals decide in Western Distributing?
Appeals of Western Distributing Company, et al., 2026-OTA-467P (OTA Case No. 230914432 et al., issued June 18, 2026), involved a Denver-based S corporation with 14 divisions. The largest were a Colorado beer distributor and an interstate trucking business that picked up and delivered in California. On January 11, 2010, the company sold the beverage division’s assets, mostly distribution rights, and reported $68,180,087 of gain as Colorado income.
The Franchise Tax Board treated all 14 divisions as unitary. The panel reversed, upholding the FTB on unity of operation but finding no unity of use and no dependency or contribution. The label did not win it: the taxpayer conceded on appeal that the gain was business income, and the panel called its nonbusiness reporting erroneous. It won by proving a separate trade or business with no California activity.
Is gain on a division sale business income, and why does your home base matter?
Revenue and Taxation Code § 25120(a) treats income from property as business income when its “acquisition, management, and disposition” are integral parts of regular operations; subdivision (d) makes the rest nonbusiness income. Hoechst Celanese Corp. v. Franchise Tax Bd., 25 Cal.4th 508 (2001), reads subdivision (a) as two independent tests, transactional and functional. Jim Beam Brands Co. v. Franchise Tax Bd., 133 Cal.App.4th 514 (2005), applied the functional test to gain on stock of a unitary subsidiary.
Business income is apportioned, for most taxpayers since 2013 by the sales factor alone under section 25128.7, with service and intangible receipts assigned by market under section 25136 and Regulation 25136-2. Nonbusiness income is allocated under sections 25123 through 25127, and here lies a trap. Section 25125(c) allocates nonbusiness gain on intangibles, including goodwill and customer contracts, to California when the commercial domicile is here, as it is for a company run from Rancho Cucamonga.
What makes two lines of business one unitary business?
Two alternative tests apply. Butler Bros. v. McColgan, 17 Cal.2d 664 (1941), looks for unity of ownership, unity of operation “as evidenced by central purchasing, advertising, accounting and management divisions,” and unity of use in a centralized executive force. Edison California Stores v. McColgan, 30 Cal.2d 472 (1947), asks whether in-state operations depend on or contribute to those outside. Mobil Oil Corp. v. Commissioner of Taxes, 445 U.S. 425 (1980), and Container Corp. of America v. Franchise Tax Bd., 463 U.S. 159 (1983), bar a state from apportioning income of a discrete business.
Regulation 25120(b) confirms one taxpayer can run several businesses; its example is a conglomerate with three independent divisions. Chase Brass & Copper Co. v. Franchise Tax Bd., 10 Cal.App.3d 496 (1970), found unity where a subsidiary bought most of its copper from affiliates. Tenneco West, Inc. v. Franchise Tax Bd., 234 Cal.App.3d 1510 (1991), found none among autonomous subsidiaries. Western Distributing landed near Tenneco: division managers ran operations while the controlling CEO raced professionally.
| Test | Authority | Points to one business | Points to separate businesses |
|---|---|---|---|
| Unity of ownership | Butler Bros. | Common ownership or control | Seldom disputed |
| Unity of operation | Butler Bros.; Chase Brass | Central purchasing, pooled insurance, shared payroll, one bank account | Each line buys, advertises, and banks alone |
| Unity of use | Butler Bros.; Chase Brass | Headquarters sets operating policy | Line managers decide; owners monitor like investors |
| Dependency or contribution | Edison; Container Corp. | Material intercompany sales or favorable parent loans | Small intercompany dealings at market rates |
| Regulation indicators | Reg. 25120(b) | Same line, vertical steps, or strong central management | Unrelated industries run independently |
How does the unitary answer reach an S corporation’s owners?
The S corporation pays California tax at 1.5 percent under section 23802(b), and each shareholder reports a pro rata share. Residents are taxed on entire taxable income under section 17041(a), so for them the fight mostly changes the entity-level tax.
Nonresidents pay only on California-source income under section 17951. Regulation 17951-4(f) treats S corporation shareholders like partners, (d)(1) apportions business income at the entity level, and (b) makes only the in-state income California-source when two businesses are not unitary. The OTA sourced trust shareholders’ goodwill gain by the S corporation’s own apportionment in Appeal of The 2009 Metropoulos Family Trust, 2019-OTA-385P, and taxed a nonresident’s share of a holding company’s gain on selling a unitary operating business in Appeal of Smith, 2023-OTA-069P.
Nonresidents who skip filing add risk, since section 19087 lets the FTB assess at any time when no return was filed; the Western Distributing shareholders drew late filing penalties. If you have left California, see our post on FTB residency audits.
How much can the unitary question cost on a Rancho Cucamonga sale?
Take a Rancho Cucamonga S corporation with a California trucking line and a distribution line in Henderson, Nevada. In 2026 it sells the Nevada assets for a $12,000,000 gain: $10,000,000 for goodwill and customer contracts, $2,000,000 for equipment. Assume a 40 percent California sales factor for the combined business (all figures illustrative).
If unitary, $4,800,000 of gain lands in California and the entity tax is $72,000. A Nevada resident who owns 30 percent picks up $1,440,000 of California-source income; at an assumed 12 percent effective rate, about $172,800 in tax.
If separate, the Nevada line has no California customers, so its factor is zero and neither level pays California tax on the gain. The nonbusiness route would backfire: section 25125(c) sends the $10,000,000 of intangible gain to the California domicile, a $150,000 entity tax. Trucking companies should also model the special formula in Regulation 25137-11, which the FTB applied to all of Western Distributing and the OTA never reached.
What happens to deductions claimed while the company filed as one business?
The FTB’s fallback was the tax benefit rule: if the beverage division was separate, its $5,320,801 of damaged and dated beer expense for 2007 through 2010 should come back. Hillsboro National Bank v. Commissioner, 460 U.S. 370 (1983), requires income when a later event is “fundamentally inconsistent” with an earlier deduction, and IRC § 111 limits the inclusion to deductions that actually reduced tax.
Raising the theory first on appeal put the burden on the FTB, which lost on the numbers: the company had apportioned net losses to California, and for 2010 only $12,666 of the questioned deductions sat inside the $157,000 loss apportioned here.
Before switching a division to separate treatment, recompute every open year both ways. Where separate treatment lowers California tax, file refund claims within the section 19306 period, generally the later of four years from the due date or one year from payment. Where it raises tax, expect a tax benefit or duty of consistency argument.
What records should you build before a sale, and how long can a challenge run?
In Western Distributing, division managers made hiring and purchasing calls, and part of their pay tracked their own division. Intercompany hauling was billed at standard rates and was under one percent of the trucking division’s revenue. The weak spots (a shared primary insurance policy, centralized payroll and benefits) are why unity of operation went to the FTB.
Give each line its own ledger, bank accounts, and financing years before a sale, and bill intercompany work at market. A separate LLC alone will not do it; Edison looked past corporate form. Those division-level books drive the purchase price allocation under IRC § 1060 on Form 8594, or the asset-level numbers behind a section 338(h)(10) election, so one set of records serves both the IRS and the FTB.
Expect years: Western Distributing sold in 2010, the FTB proposed assessments in October 2016, and the OTA ruled in June 2026. A taxpayer has 30 days after a Notice of Action to appeal to the OTA under section 19045, and either side may seek rehearing under section 19048. Under OTA Regulation 30502(e), a pending precedential opinion draws public comment for 30 days, and its status is decided 35 to 60 days after posting in early September 2026.
Frequently Asked Questions
What is a unitary business for California tax purposes?
It is a group of operations connected closely enough that California apportions their combined income as one business. Courts apply the three unities test (ownership, operation, and use) or ask whether the activities rely on and add value to one another. Meeting either test is enough.
Can one S corporation have more than one trade or business in California?
Yes. California regulations recognize that one taxpayer can operate separate trades or businesses, each apportioned with its own factors. In Western Distributing, decided in 2026, a beverage division inside a single S corporation was held not unitary with the same company’s trucking division.
Is the Western Distributing opinion binding precedent?
Not yet. It was posted as pending precedential in September 2026. After a 30-day comment period, the Office of Tax Appeals decides within 35 to 60 days of posting whether it becomes precedential, which would let it be cited in later OTA appeals.
Does reporting the gain as nonbusiness income keep it out of California?
Often not. Under Revenue and Taxation Code section 25125, nonbusiness gain on intangibles such as goodwill is allocated to California whenever the company’s commercial domicile is here, meaning it is managed from California. The stronger position is usually that the division was a separate trade or business.
Do California resident shareholders benefit from winning a unitary dispute?
Less than nonresidents do. California taxes residents on all income, so a resident’s share of the gain is taxable here either way; the savings come through the 1.5 percent entity tax. Nonresidents pay only on California-source income, so a separate-business finding can remove the gain from their California returns.
How far ahead should we prepare before selling a division?
Ideally, start several years out. The unitary analysis looks at how the business actually ran, so separate books, bank accounts, financing, and management need a track record before the sale. The same division-level records support the purchase price allocation on Form 8594.
How North Star Law Firm Can Help
North Star Law Firm advises S corporation and LLC owners in the Inland Empire and the Sacramento area on business sale tax structuring and S corporation planning, and handles FTB protests and appeals before the Office of Tax Appeals. Phillip Zagotti is a California attorney and a CPA, admitted to the U.S. Tax Court.
If your company is weighing the sale of one line of business, or the FTB has proposed an assessment on a sale you already closed, contact North Star Law Firm or schedule a consultation.