Aircraft Leasing

How it works

The standard structure is a dry lease: the airline takes the aircraft with no crew, no maintenance and no insurance bundled in, operates it on its own air operator certificate, and simply pays rent. A wet lease or ACMI arrangement, where the owner also supplies crew, maintenance and insurance, is an airline business rather than a rental, and sits outside what most leasing investors do. Ownership is almost always housed in a single-asset special purpose vehicle so that one aircraft's financing and liabilities are ring-fenced from every other aircraft in a portfolio, with investors holding the vehicle directly or units in a fund that owns many. The main way lessors acquire aircraft is sale-and-leaseback: the airline orders and takes delivery of the aircraft, sells it to the lessor at delivery, and leases it straight back, so the lessor never has to place a new aircraft cold.

Rent is fixed monthly for a term measured in years and is non-cancellable, carrying a hell-or-high-water clause that obliges the airline to pay whether or not the aircraft is flying. Alongside rent, the airline pays maintenance reserves, or supplemental rent, per flight hour and per cycle into accounts earmarked for engine restoration, life-limited parts, landing gear, APU and airframe checks; the lessor reimburses qualifying shop visits from those balances. The lease specifies the maintenance condition the aircraft must be returned in, commonly framed as half-life or full-life, with an end-of-lease cash settlement if the actual condition falls short.

The lessor's security package typically includes a cash deposit or letter of credit, assignment of the airline's insurances, a mortgage over the airframe and engines, and an IDERA, which is an irrevocable authority letting the lessor deregister and export the aircraft. The Cape Town Convention and its International Registry give a properly registered international interest priority across borders, and in states that elect Alternative A the airline must perform the lease or return the aircraft within 60 days of default, mirroring the US rule. That US rule, section 1110 of the Bankruptcy Code, requires a US airline in Chapter 11 to decide within 60 days whether to affirm and cure the lease or surrender the aircraft, a remedy most other equipment lessors do not get.

Running an aircraft is a technical job: records custody, inspections, delivery and redelivery checks and engine shop-visit oversight all require specialist staff. Direct ownership of a single aircraft needs a technical manager on retainer; retail investors instead get exposure through leasing funds, listed lessors, or fractional programs.

What it pays

Income is monthly rent, conventionally quoted as a lease rate factor, meaning the rent expressed as a percentage of the aircraft's current value. That factor is driven by the aircraft's type and age, the length of the lease, the airline's credit standing, whether the model is current or previous-generation technology, and the interest rate environment at signing, since sale-leaseback pricing is built off the lessor's own funding cost.

Maintenance reserves arrive as cash every month but are a liability against future overhauls rather than profit; only the balance left unreimbursed at lease end, and retained under the contract, becomes income to the lessor. The larger driver of total return is residual value: what the aircraft can be re-leased for, and eventually its part-out value once it is broken down for used serviceable material. Narrowbody aircraft with a wide base of potential operators re-lease far more readily than widebodies built for a small number of long-haul carriers, which is why lease rate factors and residual assumptions diverge sharply by aircraft type.

Transition between lessees is where headline rent and realised return part ways: storage, checks, cabin reconfiguration and repaint can consume months of rent with the aircraft earning nothing. Engines form a separate asset class within this income type, since they are the most valuable removable component, can be leased on their own, and are commonly priced on a green-time basis, meaning rent charged per flight hour rather than per month.

Costs and taxes

Transition and technical costs recur every time an aircraft changes hands: redelivery checks, storage and preservation while idle, ferry flights, cabin reconfiguration, repaint and the reconstitution of maintenance records if any are missing. On an ongoing basis there are servicer or asset-manager fees, SPV administration, aircraft registry and Cape Town filing fees, and legal cost attached to every lease amendment and financing.

Insurance runs in parallel to the airline's own cover: the owner carries hull all-risks and hull war insurance plus contingent and possessed liability cover, with the lessor named as additional insured and loss payee so a claim pays the owner directly if the airline's policy lapses.

On the US tax side, a true lease lets the owner depreciate the aircraft under MACRS, but an aircraft used predominantly outside the United States falls under the alternative depreciation system, which stretches the recovery period, and certain lessees can trigger tax-exempt use restrictions. Rent is ordinary income, and gain on sale recaptures prior depreciation deductions as ordinary income under section 1245 rather than as capital gain. Cross-border rent commonly attracts withholding tax in the airline's home jurisdiction, so leases carry gross-up clauses shifting that cost to the airline, and lessors choose SPV domiciles partly for the treaty network this produces.

Fund and fractional structures add another layer: acquisition fees, ongoing management fees and a carried interest sit between the aircraft's gross rent and what an investor actually receives.

Liquidity and time commitment

This is a multi-year commitment. The value of the position sits inside a long lease term, and the exit is a sale of the aircraft to another lessor, a fund, or into a securitisation, not a quoted market transaction. A private sale takes months of technical due diligence covering maintenance records, outstanding airworthiness directives and engine status, and buyers price the aircraft off its remaining lease term and the lessee's credit rather than off a spot quote.

Listed aircraft-leasing lessors and closed-end leasing funds are the tradable proxy for this asset, sellable on any market day, but that liquidity comes at the cost of trading pure asset-level economics for a share price that also reflects the issuer's leverage and management.

Direct ownership needs a technical manager engaged continuously, with workload concentrated around delivery, redelivery and any unscheduled engine removal. Time between lessees is a cash drain rather than a pause: storage, preservation and insurance keep running while no rent is coming in.

How it goes wrong

Airlines are cyclical, thin-margin operators, and a bankruptcy filing stops rent immediately; if the airline rejects the lease, the lessor is left recovering an aircraft that may be in a foreign jurisdiction with unpaid maintenance reserves and incomplete records. Repossession itself can fail where the local jurisdiction does not honor Cape Town remedies, or where liens for unpaid airport charges, navigation fees or mechanic's work attach to the airframe regardless of who owns it.

Records failure is a valuation event on its own: an aircraft with gaps in its maintenance history is worth a fraction of an identical aircraft with complete, traceable paperwork, independent of its physical condition. Technology transition works the same way from the demand side, since a new engine or airframe variant can make the previous generation hard to place years before it is physically worn out, pulling residual values down ahead of schedule.

Maintenance reserves collected during the lease can simply fall short of the actual cost of the shop visit they are meant to fund, and a power-by-the-hour lessee can return the aircraft with a shortfall and no cash to cover it. Demand shocks that hit the whole sector at once, such as a grounding directive, a pandemic, or a fuel price spike, produce rent deferral requests across an entire portfolio simultaneously rather than from one lessee.

Leverage at the SPV or fund level magnifies all of this: because aircraft are financed with debt, a modest fall in aircraft values can erase the equity well before the lease income itself stops flowing.