Choosing the Right Aircraft Lease Structure for Your Fleet

The choice between an operating lease and a finance lease comes down to who bears residual value risk: the lessor absorbs it in an operating lease, the lessee effectively assumes it in a finance lease. Dry leases suit long-term fleet placements where the airline supplies its own crew and holds its own operating certificate. Wet and ACMI arrangements fill short-term capacity gaps with the lessor's crew, maintenance, and insurance bundled in. Sale-and-leaseback structures, run through a special purpose vehicle, convert an owned aircraft into immediate cash without giving up operational use.

TL;DR:

Operating leases transfer residual value risk to the lessor and typically have shorter terms compared to finance leases, which often resemble purchased assets over their useful life.

Dry leases require the lessee to hold an Air Operator Certificate and handle all operational responsibilities, while wet leases include crew, maintenance, and insurance supplied by the lessor for short-term needs.

Sale-and-leaseback deals, often structured through insolvency-remote SPVs, enable airlines to monetize assets quickly while maintaining operational control, but proper legal and tax structuring is critical.

Cross-border arrangements necessitate registration on the International Registry, with priority based on registration date rather than contract signing, and operational control impacts regulatory compliance more than paperwork.

Major costs and risks often surface at lease end during return condition compliance, especially engine shop visits and maintenance record gaps, which can be underestimated during negotiations.

Aircraft Lease Structures: Finance Vs Operating Leases Explained
Dry, Wet, and Damp Leases: Who Controls the Aircraft?
How Sale-and-Leaseback and SPV Structures Raise Liquidity
Cape Town Convention, Registration, and Cross-Border Enforcement
Tax, Accounting, and the Hidden Costs of Lease Return
Negotiating Aircraft Lease Agreements: A Practical Checklist
What Cross-Border Deal Work Teaches About Lease Structuring
How Beyond Horizons Supports Aircraft Lease Structuring
Sources

Aircraft Lease Structures: Finance Vs Operating Leases Explained

The legal and accounting line between a finance lease and an operating lease determines who books the asset, who claims depreciation, and who ultimately absorbs the aircraft's value at the end of the term.

A finance lease, sometimes called a capital lease, transfers most of the economic characteristics of ownership to the lessee even though legal title may stay with the lessor until a purchase option is exercised. The lessee typically pays for close to the aircraft's full value over the lease term and often holds a bargain purchase option at expiry. Because the arrangement resembles a financed purchase, accounting standards generally require it on the lessee's balance sheet.

An operating lease works differently. The lessor retains meaningful residual value risk and keeps the depreciation benefit, while the lessee pays for the right to use the aircraft over a defined period. This is the workhorse structure across the aircraft leasing industry, particularly among airlines that want fleet flexibility without long-term ownership exposure.

Structuring teams typically look at a few practical markers to classify a deal correctly:

Whether the lease term covers most of the aircraft's useful economic life
Whether the present value of rent payments approaches the aircraft's fair value
Whether a bargain purchase option exists at lease end
Who bears the risk of obsolescence or a shortfall in residual value

Getting this classification wrong has real consequences. Misclassifying an operating lease as a finance lease (or vice versa) can distort a lessee's leverage ratios and trigger covenant breaches with lenders who were underwriting a different balance sheet.

Dry, Wet, and Damp Leases: Who Controls the Aircraft?

Beyond the finance-versus-operating distinction, aircraft leasing options split further based on who actually operates the aircraft day to day. This matters enormously for regulators, because operational control carries certification consequences that a contract alone cannot reassign.

Dry lease. The lessee supplies its own crew, maintenance, and insurance, and must hold its own Air Operator Certificate. Dry leases commonly run for extended periods and are the standard vehicle for long-term fleet placements, sale-and-leaseback aircraft included.
Wet lease, often structured as ACMI (aircraft, crew, maintenance, insurance). The lessor provides all four elements, and the arrangement is typically arranged for months rather than years. Airlines lean on wet leases to cover seasonal peaks, fill capacity during aircraft groundings, or launch new routes without committing to long-term fleet growth, and the FAA treats wet leases as a distinct regulatory category because the lessor may need to hold appropriate operating certificates.
Damp lease. A hybrid that typically includes aircraft and some crew (often just the flight deck) while the lessee supplies cabin crew. Converting a damp arrangement into a full wet or dry lease later can trigger fresh certification and insurance reviews, so lessees should not assume a damp lease is a stepping stone that closes cleanly.

The distinction between dry and wet leasing is not just commercial. It defines who answers to the regulator when something goes wrong in the air.

How Sale-and-Leaseback and SPV Structures Raise Liquidity

Sale-and-leaseback aircraft transactions solve a specific problem: an airline holds a valuable, depreciating asset on its balance sheet, but it needs cash more than it needs a title deed. The airline sells the aircraft to an investor, usually through a leasing company or fund, and immediately leases it back so operations continue without interruption.

Hands placing model aircraft on runway diorama

Southwest Airlines demonstrated the scale this structure can reach when it sold and leased back 36 jets, a deal that generated hundreds of millions of dollars in proceeds on relatively short lease terms. Deals at this scale have become more frequent since the pandemic, as carriers looked to monetize fleets they had already paid down.

The special purpose vehicle sits at the center of nearly every one of these deals. An SPV isolates the aircraft asset and its associated financing from the sponsor's broader balance sheet, which protects investors if the parent runs into trouble elsewhere. Structuring teams generally choose between two approaches:

Insolvency-remote "orphan" structures, where the SPV's shares sit with an independent trustee, keeping the vehicle legally distant from both the airline and the ultimate financier.
Sponsor-controlled SPVs, which offer more operational flexibility but weaker separation if the sponsor becomes insolvent.

Whether the SPV lands on- or off-balance-sheet for the airline changes its reported leverage and the covenants lenders will accept, which is why structuring these vehicles correctly changes the entire risk profile of the financing for everyone involved. Investors and lenders reviewing a sale-and-leaseback typically dig into three areas before signing: the aircraft's maintenance history and technical records, an independent valuation against comparable transactions, and the lessor's exit strategy if the lessee defaults or the aircraft's residual value undershoots projections.

Cape Town Convention, Registration, and Cross-Border Enforcement

Commercial aircraft lease structures rarely stay inside one jurisdiction. An SPV might be incorporated in one country, the aircraft registered in another, and the airline operating across a dozen more. That is precisely the problem the Cape Town Convention was built to solve.

Hands placing airplane tokens on world map

Registering an international interest on the International Registry gives lessors and financiers a uniform, predictable way to establish priority over an aircraft asset regardless of where a dispute eventually lands. Under Alternative A of the convention, creditors gain clearer remedies on default, including deregistration and export rights that would otherwise depend entirely on local insolvency law.

A few points consistently shape how these registrations play out in practice:

Priority generally follows the order of registration on the International Registry, not the order in which contracts were signed.
The governing law chosen in the lease agreement can materially affect how quickly a lessor can repossess or deregister an aircraft after a default.
Operational control is a regulatory question, not a contractual one. Simply writing that the lessee "controls operations" does not shield a lessor if the lessor is, in practice, dictating crewing or maintenance decisions.

Regulators look at conduct over paperwork, which is exactly why documentation and operational reality need to match on both sides of a lease.

Tax, Accounting, and the Hidden Costs of Lease Return

The commercial outcome of any aircraft lease agreement gets decided well before the aircraft is delivered, largely through tax treatment, accounting classification, and the fine print governing what happens at lease end.

On the accounting side, a finance lease typically lands on the lessee's balance sheet as both an asset and a liability, while a well-structured operating lease can keep the obligation off-balance-sheet under certain frameworks, changing how the deal reads to lenders and rating agencies. Tax treatment often mirrors this split. Depreciation benefits generally follow whichever party holds economic ownership, which is one reason lessors and lessees negotiate so hard over lease classification long before they negotiate rent.

The bigger financial surprise usually shows up at the back end of the deal:

Engine shop visits required to meet return condition standards, which can run into the millions depending on engine type and cycles remaining.
Life-limited parts that must be replaced or restored regardless of an aircraft's overall condition.
Gaps in maintenance records that force costly reconstruction work before an aircraft can be redelivered or resold.

Lessees consistently underestimate the cost of meeting return conditions, particularly when maintenance reserve payments made during the lease term don't fully cover the shop visit that comes due right before redelivery.

Pro Tip: Model your maintenance reserve drawdowns against actual engine cycle projections, not the lease's stated schedule. The gap between the two is where most lessees get blindsided at redelivery.

Negotiating Aircraft Lease Agreements: A Practical Checklist

Before signing any aircraft lease agreement, or committing to a sale-and-leaseback, work through three layers of review in order.

Commercial terms. Confirm lease duration and renewal options, the rent basis (fixed, stepped, or indexed), security deposits, insurance minimums, and assignment or sublease rights.
Technical terms. Pin down maintenance reserve rates, the exact return condition schedule, component and life-limited parts clauses, and who custodies the maintenance records.
Legal terms. Review representations and warranties, default remedies, the governing law clause, and the dispute resolution and enforcement mechanism if a cross-border dispute arises.

Pro Tip: Negotiate the return condition schedule with the same intensity you negotiate rent. It is usually the single largest source of unbudgeted cost at the end of an aircraft lease.

What Cross-Border Deal Work Teaches About Lease Structuring

The costliest mistakes in aircraft lease structures rarely happen at signing. They surface at redelivery, when a return condition clause that looked routine turns into a seven-figure shop visit nobody budgeted for, or when an SPV that seemed insolvency-remote on paper turns out to have gaps a lender's counsel should have caught.

Bring tax and regulatory counsel into a cross-border deal early, not after the commercial terms are locked. Specialized legal input at the term sheet stage adds real speed and certainty once you reach closing.

— HL

How Beyond Horizons Supports Aircraft Lease Structuring

Beyond Horizons gives cross-border aviation deals something most generalist firms cannot: lawyers trained at Magic Circle and US white-shoe firms who structure SPVs, sale-and-leaseback documentation, and cross-border tax planning as a coordinated package rather than three separate engagements.

Beyondhorizons

The firm's aviation practice has supported listed companies and government-linked entities through exactly the structuring questions raised above, from choosing between a finance and an operating lease to setting up an insolvency-remote SPV for a sale-and-leaseback. That experience extends into the broader cross-border corporate transactions practice, where the team handles SPV formation, financing documentation, and regulatory coordination across jurisdictions. For financing teams weighing how a new lease fits into a wider capital strategy, guidance on cross-border investment structuring and broader international corporate finance strategy can help frame the financing side before the legal documentation begins.

If you're weighing a lease structure, a sale-and-leaseback, or an SPV setup for an upcoming acquisition, reach out to Beyond Horizons to scope the deal before your term sheet locks in terms you'll be negotiating around for years.

This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.