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California closes the Montana plate loophole for supercars bought through shell companies

News · October 6, 2026 at 11:17 AM ET

Jeffrey Wiley
Jeffrey Wiley
Editor
California closes the Montana plate loophole for supercars bought through shell companies

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California has closed what's known as the Montana loophole, the trick of buying an expensive car through a Montana company to skip California's sales tax. Gov. Gavin Newsom signed Senate Bill 1406 on September 30, and it took effect immediately.

Montana doesn't charge sales tax on vehicle purchases, and it lets people form a limited liability company there without living in the state. Out-of-state buyers form an LLC, buy and register the car through it, and drive it home on Montana plates. The loophole costs California about $20 million a year in lost tax revenue, according to state estimates cited by the bill's author, state Sen. Jerry McNerney.

"For years, wealthy tax evaders have avoided paying California sales taxes by setting up phony shell companies to buy Ferraris, Lamborghinis, and other luxury vehicles in Montana and then bringing the vehicles back to our state," McNerney said, according to Motor1.


What changed

Under the old rule, a closely held company or LLC counted as a California resident for use tax only if Californians held 50% or more of it. The new law adds partnerships, limited partnerships, and limited liability partnerships to that 50% test.

Shell companies get a stricter rule. A shell company now counts as a California resident if any shareholder, partner, member, or beneficial owner lives in California. The law defines a shell company as one used to evade the tax, and lists signs of one:

  • It has no specific business activity or purpose.

  • It keeps no physical location outside California.

  • It doesn't employ people on W-2 wage forms.

  • It fails to file federal tax returns or required tax returns in another state.

The tax bill can now land on a person. Any officer, manager, partner, beneficial owner, or member of a shell company can be held personally liable for the unpaid tax, plus interest and penalties. The state has to show the company kept or used the vehicle in California within 12 months of buying it. The law covers boats and aircraft as well as cars. It also isn't retroactive. Its changes don't apply to anything bought, or under a binding purchase contract, on or before the date they took effect.

The Drive notes that Montana also doesn't require owners to smog their cars. Because the bill raises taxes, it needed a two-thirds vote in both houses of the Legislature.


Sources:

Bill text, signing date, and rules: California Legislative Information

Signing and revenue estimate: California Senate Democrats

McNerney's statement: Motor1

Smog rules and background: The Drive

Photo via Wikimedia Commons: Damian Morys (CC BY 2.0)

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Frequently Asked Questions

What is the Montana license plate loophole?
Montana has no sales tax on vehicle purchases and makes it easy to form an LLC. Out-of-state owners set up a Montana LLC, buy and register the car through it, and skip the sales or use tax they would owe in their home state.
Does California's new law apply to cars already registered in Montana?
No. The bill says its changes don't apply to any vehicle, vessel, or aircraft bought, or under a binding purchase contract, on or before the date the changes took effect. The law took effect immediately when Newsom signed it on September 30, 2026.
How does California decide a company is a shell company?
The law lists evidence including a company that has no specific business activity, keeps no physical location outside California, has no employees on W-2 forms, or fails to file federal tax returns or required tax returns in another state.
Jeffrey Wiley
Written by
Jeffrey Wiley

Jeffrey Wiley has spent more time than he'd like to admit thinking about what makes a car look right. He writes about automotive design, car culture, and the opinions people have strong feelings about. He lives in north Georgia.

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