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California enacted SB 1406 on Sept. 30, 2026, changing how the state treats certain out-of-state shell companies that own vehicles, vessels or aircraft kept in California. The law treats a shell company as a California resident if any shareholder, partner, member or beneficial owner is a California resident, and allows personal liability for unpaid taxes, interest and penalties. How the law will be enforced in individual cases remains unclear.
California enacted Senate Bill 1406 on Sept. 30, 2026, changing how the state applies use tax to vehicles, vessels and aircraft held by certain out-of-state shell companies. The law targets a registration arrangement associated with Montana-plated vehicles by treating a shell company as a California resident if any shareholder, partner, member or beneficial owner is a California resident.
California’s existing Sales and Use Tax Law generally applies to a vehicle, vessel or aircraft that a resident ships or brings into California, whether or not it is registered in the state. The Drive’s report says the rules treated business-owned property differently when determining whether the business was connected to California. Under the prior approach, a business with more than half of its interests outside California could qualify as an out-of-state business for this purpose.
SB 1406 expands the types of business entities covered by the relevant test to include partnerships, limited partnerships and limited liability partnerships, in addition to corporations and limited liability companies. The bill also changes the test for a shell company: under the summary quoted in The Drive’s report, it is considered a California resident if any shareholder, partner, member or beneficial owner is a state resident.
The law also provides for personal liability for an officer, manager, partner, beneficial owner or member of a shell company for unpaid taxes, interest and penalties due on purchases of vehicles, vessels or aircraft. The bill summary says nonpayment may constitute a crime. The source report describes SB 1406 as law, but does not give details about enforcement procedures or specific cases under the new rules.
New Exposure for Shell Company Owners
The change matters to California residents who hold property through an out-of-state entity while keeping that property in California. Under the standard described in the bill summary, the presence of one California-resident owner or beneficiary can make a shell company a California resident for the relevant tax presumption. That differs from relying on whether most of a business’s ownership or operations are outside the state.
For affected owners, the consequences may extend beyond a tax bill issued to the company. The law’s personal-liability provision can reach people connected to the entity, including members, partners and managers, for unpaid tax and associated interest and penalties. This makes the entity’s ownership, residency and tax records important to any assessment of whether the rules apply. The report does not establish that every Montana-registered vehicle kept in California is automatically taxable; the law concerns the stated tax rules and shell-company conditions.
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How the Montana Arrangement Worked
Montana is often used in vehicle-registration arrangements because it does not charge sales tax on vehicle purchases, according to The Drive. The report also says Montana does not require owners to have vehicles inspected or smog-tested. Some California residents, it says, set up Montana entities to register vehicles there, even when the vehicles were kept in California.
The earlier business-residency test could allow a business with a majority of its interests outside California to maintain an out-of-state status for this tax purpose. The law’s revision changes that framework for shell companies and adds entity types to the covered definition. The Drive characterizes the practice as having continued for decades, but the supplied report does not quantify how many entities or vehicles were involved, or how much tax California believes it lost.
“A shell company is a resident of this state if any shareholder, partner, member, or beneficial owner is a resident of this state.”
— SB 1406 summary, as quoted by The Drive
Enforcement Details Still Unclear
The available report does not explain how California will identify affected shell companies, what evidence will be used to establish an owner’s residency, or whether the state will focus on new registrations, existing entities or both. It also provides no estimate of the number of vehicles or owners likely to be affected, and no examples of tax assessments under SB 1406.
The change does not, on the information provided, establish that every out-of-state registration is improper or that every vehicle owned by an entity with a California resident is subject to tax in every circumstance. The specific tax treatment may depend on the entity, ownership and property’s connection to California. The report does not address possible challenges to the law or describe guidance from tax officials.
Owners Face a Records Review
California residents who own vehicles, vessels or aircraft through an out-of-state entity may need to review the entity’s ownership and residency information alongside the property’s location and tax records. The Drive’s report advises readers to make sure their paperwork is in order, but does not identify a state deadline or a specific filing process created by SB 1406.
The next clear developments would be state guidance or enforcement actions showing how officials apply the shell-company definition and personal-liability provision. Until those details emerge, the bill’s text and any advice from qualified tax professionals will be more useful than assuming that a Montana registration alone either triggers or avoids California tax.
Key Questions
What did California do?
California enacted SB 1406 on Sept. 30, 2026. It changes tax rules for certain shell companies holding vehicles, vessels or aircraft brought into the state.
Does the law affect only Montana-registered vehicles?
No. The law described in the report concerns shell companies and California use-tax rules for vehicles, vessels and aircraft. Montana is associated with the registration arrangement, but the supplied material does not limit the law to Montana registrations.
What makes a shell company a California resident under the new rule?
According to the bill summary quoted by The Drive, a shell company is treated as a California resident if any shareholder, partner, member or beneficial owner is a California resident.
Can individuals be responsible for unpaid taxes?
The bill summary says an officer, manager, partner, beneficial owner or member of a shell company may be personally liable for unpaid taxes, interest and penalties. The report does not detail how that provision will be applied in individual cases.
Is every vehicle registered through an out-of-state company taxable in California?
The source material does not say that every such vehicle is automatically taxable. The outcome may depend on the entity’s ownership and residency, the property’s presence in California and the applicable tax rules.
Source: hn
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