Luxury Car Owners EXPOSED Dodging California Taxes

Red classic sports car on black background with reflection — Photo: Oleksandra H / Shutterstock

The Montana LLC trick was never illegal to set up — forming a shell company in Bozeman costs about a thousand dollars and takes an afternoon — but using it to dodge sales tax on a car garaged in Beverly Hills always was, and California has now built the enforcement machinery to prove it.

Key Points

Governor Gavin Newsom signed SB 1406, closing the so-called Montana loophole by tightening residency and “predominant use” rules for vehicles registered through out-of-state LLCs.
California’s tax agency has opened more than 400 investigations and nearly 300 dealer audits, identifying roughly 2,500 suspicious sales across about 500 dealerships since 2023.
Attorney General Rob Bonta charged 14 people in a 56-count complaint alleging conspiracy to hide over $20 million in luxury vehicle purchases and evade roughly $1.8 million in taxes.
The underlying legal structure — a Montana LLC buying and titling a car — remains legitimate when the vehicle is genuinely used out of state; the crime is in the paperwork, not the entity.
Other high-tax states, including Utah and Tennessee, are running parallel crackdowns, suggesting this is now a national enforcement trend rather than a California-only story.

How the Loophole Actually Works

Montana charges no general sales tax and lets anyone, regardless of residency, form a limited liability company and register a vehicle in that entity’s name. A buyer in California forms a Montana LLC, has the LLC purchase a Ferrari or a motorhome, and titles the car to the company rather than to themselves. On paper, the transaction happened in a state with zero sales tax. In practice, the car is delivered to a driveway in Mill Valley or Beverly Hills and never sees Montana roads. California’s tax code already anticipated this: any vehicle “shipped or brought into the state” by a resident is subject to use tax, and a resident owes California sales tax unless the vehicle was first used and kept out of state for at least twelve months.

The gap the loophole exploited was practical, not legal: proving where a car actually spent its time used to be hard. That gap has closed. Investigators now cross-reference dealer records, insurance addresses, service histories, toll-road data, and automated license-plate-reader networks to establish a pattern of in-state use. California’s Department of Tax and Fee Administration says it has identified more than 1,500 vehicles tied to roughly 500 dealers and opened over 400 investigations and nearly 300 dealer audits since the practice came under scrutiny in 2023.

The Criminal Case That Made the Scheme a Headline

In March 2026, Attorney General Rob Bonta filed a 56-count complaint against 14 defendants — a transport and documentation coordinator, dealership management, dealership employees, and customers — alleging conspiracy, money laundering, perjury, and filing false tax returns to hide more than $20 million in luxury vehicle purchases and evade roughly $1.8 million in taxes. The vehicles named were not modest: a $1.8 million McLaren, a $1.5 million Porsche, a $1.26 million Ferrari. Subpoenaed text messages showed defendants were aware the paperwork was false — one asked whether drivers had been ticketed for Montana plates, another boasted about saving $70,000 in registration fees. That kind of written admission is what separates an aggressive tax strategy from a prosecutable fraud, and it’s the detail that turned a tax-policy story into a criminal one.

Beverly Hills and Costa Mesa emerged as hotspots, with investigators tracing more than 400 suspicious sales to Beverly Hills dealers alone. SB 1406, introduced by state Senator Jerry McNerney of Pleasanton and signed by Governor Newsom, targets the structural end of the problem: it redefines residency and use standards so that a shell company with no physical presence, no employees, and no genuine business activity in Montana can no longer shield a California-used vehicle from tax. The bill also reinforces the existing rule that a vehicle brought into California becomes taxable after roughly a year of in-state use, closing ambiguity that defense attorneys had previously exploited.

Where the Real Disagreement Lies

It would be a mistake to read this purely as California inventing a villain. Montana’s own Department of Justice has told reporters flatly that “this is not a tax loophole, it’s Montana law”, and tax and legal commentators agree the Montana LLC structure is, in itself, “perfectly legal from Montana’s point of view”, provided the entity files proper returns and maintains an agent for service. Hagerty, Roth & Co., and Dirt Legal all describe scenarios — a vehicle genuinely used primarily out of state, an RV owner with no fixed home jurisdiction, a Montana entity conducting real business — where the structure holds up under scrutiny. The dispute, in other words, is not over whether Montana LLCs are legal. They are. The dispute is over what happens when the paperwork says Montana and the odometer says California.

California’s own enforcement language concedes this nuance: the agency describes the loophole as something that “allows out-of-state owners to legally purchase and title vehicles there on paper, even when they are primarily used in other states”. That sentence is the whole case in miniature — legal in form, taxable in substance. Prosecutors are not charging people for owning a Montana LLC; they are charging them for falsifying shipping documents and tax filings to disguise where the car actually lived. The Whistlin’ Diesel case in Tennessee, where YouTuber Cody Detwiler faces felony tax-evasion charges over a Montana-registered vehicle, follows the identical pattern and underscores that this is not a California peculiarity but a structural weakness in how all low-tax-state LLC registrations interact with high-tax-state use laws.

What Comes Next for Owners and Dealers

The practical effect of SB 1406 and the parallel criminal prosecutions is to shift the burden of proof. Owners who can document genuine out-of-state business activity, real operating agreements, and consistent out-of-state use have little to fear. Owners who bought a template LLC online, registered a daily driver with Montana plates, and never left California face a state that now has the data infrastructure — plate readers, dealer audits, insurance cross-checks — to find them. Utah has already pursued roughly 80,000 vehicle owners under similar logic, and Georgia and Tennessee have moved in parallel, signaling that the Montana loophole’s shelf life as a low-risk tax dodge is ending nationally, not just in California. Montana, for its part, has shown no inclination to close the door on its side; the registration fees and LLC-formation business remain a modest but steady revenue stream it has little incentive to give up.