Summary: Buying a luxury RV or private aircraft? Think a Montana LLC or out-of-state registration will keep California from taxing you? Think again. California’s Department of Tax and Fee Administration has a detailed playbook, and this article reveals exactly how the state tracks, audits, and taxes high-value purchases.
————————————————————————–
You covet that expensive aircraft. You dream about that luxury RV. Then you see how much tax California assesses, and suddenly the dream feels less shiny. Friends and neighbors insist you do not have to pay if you are “smart.” Be careful. California has built an entire framework—statutes, regulations, manuals, and coordinated enforcement—to challenge these arrangements.
In short: California assumes high-value toys purchased by residents are taxable, no matter where you put the license plate. If you plan to rely on exemptions or entity structures, you must know the real rules and build a record from day one.
This article discusses California’s official rules on sales and use tax for aircraft, motorhomes, and vessels; how “first functional use,” the 12-month presumptions, and the 50% out-of-state use doctrine actually work; what happens if you form an out-of-state entity to hold the asset; the realities of entry into California; insurance and registration problems; the single-member LLC trap; state-by-state comparisons (Nevada, Arizona, Oregon, Montana, Washington, Wyoming); and where to find California’s own audit manuals and regulations.
California’s legal foundation
California Revenue & Taxation Code §§ 6201 and 6241 impose a “use tax” parallel to sales tax. When tangible personal property such as a motorhome, vessel, or aircraft is purchased outside California without sales tax being collected, the state may still impose use tax if the property is used, stored, or otherwise consumed in California.
The California Department of Tax and Fee Administration (CDTFA) enforces these rules through its Audit Manual, Chapter 6 (Vehicle, Vessel & Aircraft Dealers); Sales & Use Tax Regulations, Article 11 (especially Reg. 1620 and Reg. 1593); its Tax Guide for Purchasers of Vehicles, Vessels & Aircraft; and the Compliance Policy and Procedures Manual, Chapter 8.
The 12-month presumption and first functional use
Motorhomes, RVs, and vessels. Regulation 1620(b)(3) creates a rebuttable presumption: if a California resident purchases the property outside California and brings it into the state within 12 months of purchase (or first functional use), it is presumed acquired for use in California. This presumption may be rebutted only by evidence that during the first 12 months the property was used or stored outside California more than 50% of the time. The “90-day rule” is harsher: if the property is brought into California within 90 days of purchase (excluding shipping or transit time), there is generally an irrebuttable presumption of California use. A motorhome can enter California during the first 12 months, but unless the majority of its use or storage is outside California during that full 12-month window, use tax will be due. Temporary entry solely for repair, retrofitting, or modification is allowed but must be carefully documented (Reg. 1620(b)(4)).
Aircraft. Regulation 1593(b)(2) provides a different standard. If an aircraft is purchased outside California and first functionally used outside the state, but then brought into California within 12 months, it is presumed taxable unless, during the six months following entry, more than half of its flight time is in interstate or foreign commerce or more than half of its ground or flight time is outside California. An aircraft can therefore enter California during the first year, but the owner must prove that its use during the six months after entry meets this test. The 90-day rule applies here too: if the aircraft enters within 90 days of purchase without qualifying use, the presumption becomes nearly irrebuttable.
“Fly-Away” and nonresident certificates
Regulation 1593 allows non-residents to issue exemption certificates at the time of purchase, relieving the seller of tax collection. The certificate must be timely and in good faith. If the aircraft is then used in California inconsistently (beyond removal or repair), the exemption collapses and use tax applies. The so-called “fly-away” structure—taking delivery outside California and immediately moving the aircraft to a non-California base—is recognized but heavily scrutinized.
Credit for tax paid elsewhere
If valid sales or use tax has been paid to another jurisdiction, California may allow a credit, but only up to the amount of California’s liability. If the other state’s tax is lower, the difference must be paid.
Property tax overlay
Even if sales or use tax is avoided, annual property (ad valorem) tax may apply. Revenue & Taxation Code § 5301 requires county assessors to assess private aircraft habitually situated in their county. Situs is generally where the aircraft is based when not in flight, and assessments may be allocated if the aircraft spends part of its time in California.
Out-of-state entities and the “resident purchaser” trap
Many buyers form out-of-state LLCs or corporations to hold title. Regulation 1620(b)(5) undercuts this: a closely held corporation or LLC is deemed a California resident if 50% or more of ownership is by California residents. Single-member LLCs owned by Californians are treated as resident entities. Multi-member LLCs with only California owners are too. S corporations and C corporations face the same problem. Trusts provide little better protection. Transfers without consideration (such as contributions) may not themselves trigger tax (see CDTFA Annotation 335.0083.750) but later use in California still does.
Entity-Owned Aircraft
Another issue arises when an aircraft is placed into a separate entity. From a regulatory standpoint, the FAA distinguishes between owner-operated flights under Part 91 and charter or commercial operations under Part 135. If the structure and operations make it look like the entity is “holding out” or providing transportation for compensation, FAA inspectors may reclassify the operation as Part 135, triggering much stricter compliance requirements. At the same time, the tax rules differ: aircraft used in charter or commercial service may qualify for five-year MACRS depreciation (and sometimes bonus depreciation), while aircraft used strictly for business under Part 91 are typically subject to a seven-year recovery period. In audits, the IRS has recast depreciation schedules where ownership and operations did not align—for example, where an aircraft was parked in a separate LLC, nominally leased to a business, but functionally used as an owner-user. That mismatch can lead not only to FAA scrutiny but also to restated depreciation, disallowed deductions, and penalties.
Entity-Owned RVs
Many buyers place a motorhome or luxury RV into an LLC or corporation, hoping to reduce liability, improve deductibility, or shield against California use tax. But entity ownership of an RV comes with its own pitfalls. Insurers typically require that the policy match the true base and use of the vehicle. If the RV is titled in a Montana LLC but kept in California, an insurer may deny coverage after an accident, arguing misrepresentation. California DMV also treats mismatched ownership as a red flag: when a California resident drives a vehicle registered to an out-of-state entity, DMV and CDTFA auditors may assert that the entity is a shell and reimpose use tax. On the income tax side, if the RV is placed in an entity and deductions are claimed, the IRS may examine whether the RV is truly used in a trade or business or whether it is a hobby loss asset. If personal use dominates, depreciation may be disallowed and expenses limited, even if the vehicle sits inside a corporate wrapper. As with aircraft, placing an RV into an entity can sometimes increase scrutiny rather than reduce it.
Practical risks
Alter ego and disregard doctrines allow auditors to pierce shells. Constructive use doctrines capture personal enjoyment even if an entity is the paper owner. Auditors trace inbound use with flight logs, hangar leases, GPS records, maintenance and fuel invoices, and insurance contracts. Nexus rules may impose California corporate or franchise tax if the entity is engaged here.
Entry strategies
Practitioners sometimes advise avoiding California entry during the first 12 months or restricting it to documented repairs. For RVs, the test is majority out-of-state use over 12 months. For aircraft, the test is six months after entry. Both require meticulous documentation.
Insurance, registration, and red flags
Insurers demand coverage match the asset’s actual base. A Montana-registered RV parked in California may face denied claims. A California driver’s license with an out-of-state plate is a red flag. California DMV requires new residents to register vehicles here within 20 days, with use tax generally collected at registration unless a valid exemption applies.
Interstate information-sharing
California exchanges registration and tax data with other states and coordinates with the FAA and county assessors. High-value assets are routinely flagged in audits.
State comparisons
Nevada offers no income tax but charges registration fees; California presumes resident ownership is taxable. Arizona has lower fees but imposes its own taxes. Oregon has no sales tax but does not protect against California use tax. Montana is famous for “Montana LLC” registrations of RVs, but these are aggressively audited. Washington has aviation infrastructure but its own taxes. Wyoming offers low fees and flexible LLC laws, but California still applies its residence tests.
Write-offs and depreciation
Entities may deduct depreciation, insurance, and operating expenses if business use is genuine, subject to federal limits and California conformity. Strict allocation between business and personal use is required. Transfers into an entity must avoid becoming taxable sales. Lease structures must be treated carefully. And if you intend to claim tax deductions for the RV or aircraft, expect significantly more scrutiny. CDTFA auditors know that once deductions are claimed, there must be logs, allocations, and evidence of business purpose—and they will demand it.
Single-member LLCs
California treats single-member LLCs owned by Californians as resident purchasers. Out-of-state single-member LLCs rarely help. Auditors look through them as shells.
Enforcement reality
The CDTFA Audit Manual, Chapter 6, shows how auditors review dealer files, DMV records, and one-shot sales. They demand records and often treat noncompliance as negligence or willful avoidance, increasing penalties and interest. Because aircraft and motorhomes are high-value, CDTFA dedicates significant resources to these audits.
Conclusion
Entity title and out-of-state plates do not determine taxability. Facts and records do. For RVs, any entry into California during the first 12 months must be offset by more than 50% out-of-state use in that year. For aircraft, entry during the first 12 months is allowed, but the six months after entry must show qualifying flight or ground time outside California or in interstate commerce. Without proof, California will impose tax.
The CDTFA Audit Manual (Chapter 6), Sales & Use Tax Regulations (Article 11, Regulations 1620 and 1593), the Compliance Policy and Procedures Manual (Chapter 8), and Revenue & Taxation Code § 5301 are the state’s own guides—and the same tools auditors use. Planning must be grounded in these authorities, not in folklore.
Key takeaways
- California assumes aircraft and RVs purchased by residents are taxable unless you prove otherwise.
- RVs are judged on a 12-month window; aircraft on the six months after entry.
The “90-day rule” makes early entry into California almost impossible to defend. - Out-of-state LLCs and corporations do not shield California residents if ownership is 50% or more Californian.
- Insurance, DMV registration, and driver’s license mismatches are audit red flags.
States and the FAA share data—paper domiciles are easy to detect.
Write-offs require genuine business use and strict documentation. Deducting the RV or aircraft on your tax return invites much deeper scrutiny.
- The CDTFA Audit Manual is the playbook auditors use. If you cannot defend your plan under it, do not expect to win an audit.
- California does not chase every RV and aircraft—but when it does, the bills are big. Do not bet a million-dollar coach or jet on cocktail-party tax advice.
Appendix: Key California Authorities
Statutes
- California Revenue & Taxation Code § 6201 (Imposition of use tax)
- California Revenue & Taxation Code § 6241 (Presumption of purchase for storage or use)
- California Revenue & Taxation Code § 5301 (Assessment of private aircraft by county assessor)
Regulations
- California Code of Regulations, title 18, § 1620 (Interstate and Foreign Commerce; vehicles, vessels, and aircraft use tax rules, including 12-month presumption and 90-day rule)
- California Code of Regulations, title 18, § 1593 (Aircraft Common Carrier Exemption; nonresident certificates; six-month rebuttal test)
Manuals and Guidance
- CDTFA Audit Manual, Chapter 6: Vehicle, Vessel & Aircraft Dealers (California Department of Tax and Fee Administration)
- CDTFA Compliance Policy and Procedures Manual, Chapter 8: Consumer Use Tax, Exemptions, Gifts, etc. (California Department of Tax and Fee Administration)
- CDTFA “Tax Guide for Purchasers of Vehicles, Vessels & Aircraft” (California Department of Tax and Fee Administration, industry guide)
Annotations
- CDTFA Annotation 335.0083.750 (Transfer of property to corporation without consideration is not a taxable sale or purchase; subsequent lease analysis)
IMPORTANT: Legal Disclaimer
The information provided in these articles is for general informational and educational purposes only. It is not intended as legal advice and should not be construed as such. Every legal situation is unique, and you should consult a qualified attorney for advice regarding your particular circumstances.
We make no guarantees or warranties regarding the accuracy, completeness, or timeliness of the information presented, as the law may change or vary by jurisdiction. The content may not reflect the most current legal developments, and we are under no obligation to update it.
By using or relying on the information provided in these articles, you agree that you do so at your own risk, and we shall not be liable for any errors or omissions, or any damages resulting from its use. The use of this website and reliance on the information herein does not create an attorney-client relationship.
- The law differs from jurisdiction to jurisdiction. The information in these articles may not apply to your jurisdiction.
- We may reference third-party websites or content, but we do not endorse or guarantee the accuracy or completeness of third-party information.
- Reading these articles does not create any professional duty between the author and the reader.
- Copyright Notice: The contents of these articles are protected by copyright and may not be reproduced without permission.