State Registration Strategies: Montana, Delaware, and Other Favorable Jurisdictions

Why do aircraft buyers register in Montana or Delaware?

Because neither state imposes sales tax on aircraft purchases, and both make it administratively cheap to form a single-member LLC that takes title at closing. A $40 million Gulfstream closing in California generates roughly $3 million in California sales tax. The same closing through a Montana LLC, with the aircraft never touching California ground in the first 90 days, can drop that number to zero on the purchase side. That arithmetic — not patriotism for Big Sky country — is what drives the structure.

The mechanics are straightforward. The buyer forms a Montana LLC through a registered agent (Montana Secretary of State filing, roughly $35, plus annual report fees). The LLC, not the individual, takes title on the FAA Bill of Sale (AC Form 8050-2) and is the registered owner on AC Form 8050-1. The aircraft is based wherever it is actually flown, but the paper owner is Montana. Delaware works the same way through the Division of Corporations, with the added advantage that Delaware LLC law is the most developed in the country and lenders are comfortable with it.

What's the difference between sales tax and use tax on aircraft?

Sales tax is imposed by the state where the transaction closes; use tax is imposed by the state where the aircraft is used and stored, regardless of where the sale happened. This is the distinction that catches owners who think a Montana LLC ends the analysis. It does not. If a Montana-registered Citation is hangared in Scottsdale and flown predominantly out of KSDL, Arizona's Department of Revenue takes the position that Arizona use tax (5.6% state plus local) applies on the aircraft's fair market value at the point it entered Arizona.

California, New York, Florida, Texas, and Massachusetts all run active aircraft-use-tax enforcement programs. California's CDTFA cross-references FAA registration data against California hangar leases and flight tracking. The agency sends use-tax assessment letters routinely to owners whose Delaware or Montana LLCs base aircraft at KSMO, KVNY, or KSQL. The assessment includes tax, interest from the date of first use in California, and often a negligence penalty.

Which states actually impose no sales tax on aircraft?

Five states impose no general sales tax: Montana, Delaware, New Hampshire, Oregon, and Alaska. Of those, Montana and Delaware dominate aircraft registration because of registered-agent infrastructure and lender familiarity. South Dakota imposes sales tax generally but exempts aircraft used in interstate commerce under certain conditions, and its DMV-style aircraft registration regime is straightforward. Oregon imposes no sales tax but its aircraft registration fees with the Oregon Department of Aviation are modest and the state has not historically been aggressive on use tax for transient aircraft.

New Hampshire and Alaska see almost no aircraft registration traffic because they offer no LLC or trust advantages over Delaware and no logistical advantages over Montana. The choice in practice is almost always Montana versus Delaware, occasionally South Dakota for owner-flown piston and turboprop aircraft where the registered-agent costs of Delaware feel disproportionate.

When does the Montana LLC structure actually work?

It works cleanly when the aircraft is genuinely itinerant or based in a state with its own favorable use-tax treatment. An owner who lives in Jackson, Wyoming, bases a King Air at KJAC, and flies a national footprint can register through a Montana LLC and Wyoming will not assess use tax because Wyoming exempts aircraft. An owner based in Oregon or in a state with a fly-away exemption that the buyer can document — Texas, for example, exempts aircraft removed from the state within a defined window — can use the structure to manage the sale-day liability while remaining defensible on use tax.

The structure fails when the home state has aggressive use-tax enforcement and the owner cannot document a genuine business or interstate-commerce use that qualifies for an exemption. A California resident hangaring a Phenom 300 at KVNY through a Delaware LLC is the textbook fact pattern California's CDTFA looks for. The agency has won these assessments repeatedly.

What about the fly-away exemption and the 12-month test?

Most states with use tax provide an exemption if the aircraft is purchased out of state and not brought into the taxing state for a defined period — commonly six or 12 months — with documented use elsewhere. California's test under Regulation 1620 is the most-litigated: the aircraft must be used outside California for more than half of the first six months following purchase, with flight logs and hangar receipts to prove it. Florida's test under §212.05(1)(a)2 is 20 days of out-of-state use before entry, with similar documentation requirements.

This is where the Montana LLC structure earns its keep when paired with disciplined initial-period flight planning. The owner takes delivery outside the home state, conducts genuine business flights for the test period, retains fuel receipts and hangar invoices documenting the out-of-state use, and only then brings the aircraft into the home state. Done correctly, the combination defeats both sales tax (Montana closing) and use tax (documented exemption period).

Does §1031 like-kind exchange still help on the trade?

No. The 2017 TCJA eliminated §1031 like-kind exchange treatment for personal property, including aircraft, effective January 1, 2018. Aircraft trades are now fully taxable events on the federal side, with depreciation recapture under §1245 hitting at ordinary rates up to the recapture amount. State income tax conformity varies — California conforms, Florida has no personal income tax, Texas has no personal income tax. The state-registration analysis is now entirely about sales and use tax, not federal deferral.

What documentation does the structure require?

Contemporaneous records, kept from day one. The IRS and state revenue departments expect to see the LLC operating agreement, the FAA registration in the LLC name, the bill of sale, insurance policies naming the LLC as insured, a hangar lease in the LLC name, and flight logs identifying every leg by date, route, passengers, and business purpose. If the LLC is intended to operate the aircraft as a business — which is what makes the §168(k) bonus depreciation analysis work alongside the sales-tax structure — the LLC needs a bank account, books, and a defensible business purpose under §162 and §183.

Owners who form the Montana LLC, take title, and then operate the aircraft as a personal asset with no separate books are the ones who lose both the sales-tax position and any depreciation deductions when audited. The structure is real or it is not. State revenue auditors and IRS examiners both know what the empty-shell version looks like.