Aircraft Financing 101
An intuitive understanding of how aircraft are paid for — no memorizing needed.
Start with something you already know
Most of aircraft finance rhymes with how a house is paid for. Begin there, then watch where aircraft diverge.
The big idea
If you understand how a house is financed, you already understand most of how an aircraft is financed: a big-ticket asset, funded over time, where the owner needn't be the one using it.
House world → aircraft world
Where the analogy breaks down
It moves
A jet changes country, operator and jurisdiction. Lenders rely on the Cape Town Convention to protect their rights across borders.
It needs heavy upkeep
Engines and airframes need costly scheduled checks. Maintenance reserves and return conditions are written into every deal.
It depreciates predictably
Value tracks age, type and demand. Residual value — what it's worth at lease-end — drives the economics.
It has a global market
A liquid worldwide secondary market means a jet can be re-leased or sold far more readily than a single house.
Quick check
1. In the house-to-aircraft analogy, the "homebuyer" maps to whom?
The airline. It's the party that actually uses the asset — like the person who lives in the house.
2. Which is a key way an aircraft differs from a house?
Mobility. A jet can change country and operator — which is exactly why cross-border enforceability matters.
3. Why does aviation finance lean on the Cape Town Convention?
Cross-border enforceability. The treaty lets lenders and lessors protect and recover their interest wherever the jet flies.
4. Aircraft leases and availability-based infrastructure share which feature that makes their cashflows financeable?
Contracted cashflow. A hell-or-high-water lease, like an availability payment in infrastructure, is owed regardless of usage — which is exactly what lenders advance against.
Renting a jet, with options
About half the world's commercial fleet is leased, not owned. The airline flies the jet; the lessor keeps the asset and a contracted, multi-year income stream.
Operating lease
Like renting a flat
Use the jet for a term, then hand it back. The lessor owns it and bears residual-value risk. Keeps fleets flexible and off the balance sheet.
Finance lease
Like rent-to-own
Payments cover most of the aircraft's value over its life; the airline usually ends up owning it. Economically close to a loan.
Sale & leaseback
Unlock cash, keep flying
The airline sells a jet to a lessor and leases it straight back — freeing capital while continuing to operate the same aircraft.
Two ways to lease: dry vs wet
Dry lease
just the aircraft
The airline supplies its own crew, maintenance and insurance and flies the jet on its own licence — the standard operating lease used throughout this course.
Wet lease (ACMI)
Aircraft + Crew + Maintenance + Insurance
The lessor supplies the whole package and keeps operational control — used for short-term capacity: peak season, delays or launching a new route.
JOLCO — a global structure for new jets
Japanese investors
Provide equity and claim aircraft depreciation under Japanese tax rules.
Bank loan
Funds the rest of the purchase price, secured on the aircraft.
Airline + call option
Leases the jet and holds an option to buy it at a set point — usually exercised.
Three clauses every lease lives by
Hell or high water
Rent is absolute
The airline pays in full, on time, no matter what — no set-off or deductions, even if the jet is grounded.
Quiet enjoyment
The airline's protection
So long as the airline performs, the lessor and its financiers won't disturb its possession or use — even financiers it never signed with.
Airline maintains the jet
A "net" lease
The lessor owns the aircraft, but the airline maintains it — carrying upkeep, insurance and compliance, and returning it in agreed condition.
The clause that holds it all up: hell or high water
What the clause says
The lessee's promise to pay rent is absolute, unconditional and non-refundable — due in full and on time, irrespective of any contingency whatsoever. No set-off, deduction or counterclaim — even if the jet is grounded, requisitioned, or a total loss.
Why it's there
The rent stream is what the financing is advanced against. The clause moves operational and market risk onto the airline, so lenders and investors can rely on the cashflow whatever happens to the aircraft or the market.
Tested in court — and upheld, including through COVID
A lessee argued COVID grounding had frustrated its leases. The court refused — the rent risk had been assumed by the airline, and a lessee will generally pay "come hell, high water or a pandemic".
Summary judgment for the lessor on three 10-year dry leases. COVID travel bans and an illegality / frustration defence both failed against the unconditional payment clause.
A recent reaffirmation: the payment obligation was again read in the lessor's favour, with the court indicating the approach can extend even to wet leases.
The obligation to pay was not excused by the defence raised. US courts take the same line — in GE Capital v FPL Service Corp, payment was upheld despite equipment lost to Hurricane Sandy.
Lease Rate Factor (LRF)
Monthly rent as a percentage of the aircraft's value — shorthand for a lease's price. Typically about 0.4–1% per month.
Base value: half-life vs full-life
Half-life assumes maintenance midway between overhauls — the standard quoting condition. Full-life assumes everything freshly overhauled, so it's worth more.
An aircraft is a stack of maintenance clocks
Airframe checks (routine, escalating)
- A checkLight; every few hundred flight hours — done overnight.
- C checkHeavy base check; ~every 18–24 months — days to weeks grounded.
- D checkDeepest structural check; ~every 6–10 years — very costly.
The big-ticket items
- EnginesShop visits on their own cycle — often the single largest maintenance cost.
- Life-limited partsHard cycle limit — replaced when reached, whatever their condition.
Who funds all that upkeep?
Maintenance reserves
a.k.a. supplemental rent
The airline pays the lessor per flight-hour and cycle into funds earmarked for big events, then claims the cost back. Common with weaker-credit lessees.
End-of-lease compensation
the redelivery settle-up
Stronger airlines settle at return instead: actual condition is compared with the agreed return condition, and a balancing payment flows whichever way is owed.
Quick check
1. An operating lease is most like…
Renting a flat. Use it for a term, then hand it back — the lessor keeps the asset and its residual-value risk.
2. A "hell or high water" clause means…
Absolute rent. The unconditional payment stream is what the whole deal is financed against.
3. Under an operating lease, who maintains the aircraft?
The airline. It's a "net" lease: the lessor owns the jet, but the airline carries upkeep, insurance and compliance.
4. A 0.8% lease rate factor on a $50m jet implies monthly rent of about…
$400k. $50m × 0.8% = $400,000 per month.
5. A "wet lease" (ACMI) provides…
ACMI. The lessor supplies the whole package and keeps operational control — a short-term capacity tool.
6. On an operating lease, the lessor's big economic risk is residual value — the jet's worth at lease-end. What best mitigates it?
Protect the asset and its resale. Unlike a fixed concession asset that's simply handed back, a jet's value rests on its maintenance condition and a liquid global resale market — so lessors lock in return condition, fund big checks via reserves, and prefer in-demand types.
The mortgage, scaled up — made safe across borders
Not every jet is leased. Many are bought with borrowed money secured on the aircraft, and a treaty makes that money safe to lend worldwide.
Aircraft loans
The airline borrows most of the price and grants the lender a mortgage over the aircraft — plus engines, insurances and lease income. Lenders fund roughly 80% of value; the down-payment is the equity cushion. Miss the payments and the lender can repossess.
Export-credit (ECA) loans
Backed by export-credit agencies in the manufacturers' home countries (Boeing, Airbus). The agency support means cheaper funding and strong security — a staple of the market.
What's in the deal: the collateral package
A financed aircraft is a bundle of tangible and intangible assets — the lessor or lender takes security over all of them.
Airframe
The fuselage and wings — the core hull.
Engines & APU
High-value; often financed separately and can be swapped.
Parts & landing gear
Components and life-limited parts, tracked back to birth.
Aircraft records
The paperwork proving airworthiness — missing records destroy value.
Warranties
Manufacturer warranties, assigned to the lessor.
Intangibles
Slots, routes and gates can carry real value of their own.
Cape Town Convention
One rulebook
A 2001 treaty and its Aircraft Protocol give signatory states a single framework for security interests in airframes, engines and helicopters.
The International Registry
A central electronic registry (in Dublin) where interests are filed. Priority follows order of registration — first to register, first in line.
IDERA & fast recovery
An IDERA lets a creditor de-register and export the jet on default. "Alternative A" sets a fixed window (often 60 days) in insolvency.
Why it matters
Lower enforcement risk means cheaper funding — strong deals can even earn a "Cape Town discount" on export-credit-backed financing.
Who legally owns the jet?
Financiers rarely own a jet directly. A single-purpose company or trust holds title, ring-fencing the asset from everything else.
Special-purpose vehicle
one jet, one company
A standalone company owns a single aircraft and does nothing else — isolating it from the parent's other risks.
Bankruptcy-remote
ring-fenced
Structured so the vehicle can't easily be pulled into a parent's insolvency — reassuring to lenders and bond investors.
Owner & orphan trusts
a neutral title-holder
Title is held by a trust — often "orphaned", owned by no one in the deal — for tax, registration or neutrality reasons.
Structure: a lease with acquisition finance
Lease with acquisition finance. A bankruptcy-remote SPV buys the jet (funded by equity plus a loan), takes title, and leases it to the airline. The airline's unconditional rent services the debt; the lender holds a mortgage over the aircraft and the lease income.
Counterparty risk & the downside playbook
Lessee (offtaker) credit
Rent depends on the airline's ability to pay. Lessors weigh each carrier's credit, network and home market — the offtaker analysis familiar from project finance.
Concentration
A book heavily tied to one airline, region or aircraft type carries more risk. Spreading lessees and types smooths the cashflow.
1 · Default
Missed payments or breach trigger the lease's remedies.
2 · Remarket
The lessor lines up a new operator for the aircraft.
3 · Repossess & re-lease
Cape Town / IDERA rights help recover and redeploy the jet.
Quick check
1. What typically secures an aircraft loan?
The aircraft itself. The security package centres on a mortgage over the airframe, with engines, insurances and income assigned too.
2. An IDERA lets a creditor…
De-register and export. It speeds recovery of a jet across borders without chasing fresh consent.
3. The usual recovery path on lessee default is…
Default → remarket → repossess. The aircraft's mobility and resale market are what make recovery possible.
4. An airline lessee defaulting is a counterparty risk. Its closest parallel in infrastructure finance is…
Offtaker risk. In both, the cashflow is only as good as the party contracted to pay. The mitigants overlap too: credit analysis, security deposits and reserves, and step-in / enforcement rights.
5. Unlike a toll road or power plant, an aircraft moves. For a financier, that mobility is…
It cuts both ways. Fixed infrastructure can't be moved, so its security rests on local legal and regulatory stability. A jet can be recovered across borders and re-leased — the Cape Town regime exists to make that upside reliable.
From a single aircraft to a financed fleet
Aircraft are rarely financed one at a time. Pools of jets are assembled, refinanced in the capital markets, and traded.
Portfolio trading
Bundles of jets with their leases attached are bought and sold like income-producing property portfolios — priced on the rentals, lessee credit and residual values.
Warehouse financing
A revolving line used to accumulate aircraft over time, then refinance the whole pool at once — much like a homebuilder's construction loan.
PDP financing
Manufacturers demand staged pre-delivery payments for years before a jet arrives. PDP loans fund those instalments, repaid by long-term financing at delivery.
Structure: leases with warehouse financing
Warehouse financing. A revolving bank facility (plus sponsor equity) funds a Borrower SPV that buys aircraft one by one into a pool, each leased to an airline. Rentals and the aircraft secure the lenders. Once the pool is big enough, it's refinanced — termed out — in the capital markets.
Build, then term out
Assemble
Aircraft are acquired one by one — often drawn under a warehouse facility — into a growing pool.
Term out
Once large enough, the pool is refinanced in the capital markets via an ABS or EETC bond, repaying the warehouse.
Recycle
The freed-up capital funds the next aircraft, and portfolios can be traded to reshape the book.
Structure: an aircraft ABS
Aircraft ABS. The lessor sells a pool of aircraft and their leases to a bankruptcy-remote issuer, which funds the purchase by issuing notes in tranches (Class A/B/C) to investors. Lease rentals flow up through a servicer and are paid out by seniority — with credit enhancement and a liquidity facility supporting the senior notes.
Quick check
1. A warehouse facility is used to…
Accumulate, then refinance. It's a revolving line that builds a pool before terming out.
2. PDP financing funds…
Pre-delivery payments. Staged deposits are due for years before a jet is handed over; PDP loans bridge them.
3. "Build-then-term-out" usually means a warehouse is refinanced via…
Capital markets. The pool is bundled and sold as a bond, repaying the warehouse line.
4. Why do large lessors hold diversified portfolios and term warehouses out into ABS/EETC bonds?
Diversify and match tenor. Spreading risk smooths the cashflow, and build-then-term-out matches long-lived assets with long-term capital — the same playbook used in infrastructure platform financing.
One aircraft, a whole financing toolkit
How the pieces fit: the full toolkit, mapped across a single aircraft's life.
From order to refinance
Quick check
1. Which stage of a jet's life typically uses a sale-and-leaseback?
In service. An airline sells a jet it already operates and leases it straight back, unlocking cash.
2. Which tool fits the order / pre-delivery stage of a jet's life?
PDP financing. It funds the deposits due before the aircraft is even delivered.
Everything so far, in one document
A capstone, grounded in a genuine operating lease — Vermillion Aviation (Nine) Ltd leasing an Airbus A320 to LATAM Airlines, filed publicly with the U.S. SEC.
~20 clauses, 16 schedules
From definitions to redelivery; the schedules hold the numbers and forms.
English law
An Irish lessor (a Dublin company) and a Chilean airline.
Built in Chapter 11
Signed during LATAM's restructuring, so it carries U.S. bankruptcy-court machinery.
How the agreement is built
- Cl 1–3The setup — definitions, representations & warranties, conditions precedent (incl. the Cape Town filing and a bankruptcy-court order).
- Cl 4–6The commercial core — term, delivery and rent (payable unconditionally, no set-off), plus quiet enjoyment and disclaimers.
- Cl 8–14Looking after the asset — registration & liens, possession & subleasing, maintenance, engines/APU, insurance and warranties.
- Cl 15–19When it ends or goes wrong — total loss & Agreed Value, default & remedies, redelivery, indemnities & tax.
- SchedulesWhere the detail lives — rent, delivery/redelivery condition, end-of-lease payments, the IDERA and the Quiet Enjoyment Letter.
Every concept has a home in the contract
Quick check
1. "Payment obligations unconditional / no set-off" is the contract form of…
Hell or high water. Rent is absolute — payable in full whatever happens, with no deductions.
2. The Quiet Enjoyment Letter and the IDERA usually appear in a lease as…
Schedules. The body of the lease sets obligations; the schedules hold the agreed forms and numbers.
3. A schedule of "end-of-lease utilisation payments" corresponds to…
End-of-lease compensation. It settles the jet's actual condition against the agreed return condition.
4. Across a lease, risks like grounding, total loss and wear are handled mainly by…
A lease is a risk-allocation document. Each risk is assigned to the party best able to bear it — exactly what an infrastructure project agreement does, so that the cashflow becomes financeable.
You now think like an aircraft financier
- ✦ Aircraft finance starts from the everyday logic of a home loan.
- ✦ Leasing and lending split the asset's ownership from its use.
- ✦ Portfolio, warehouse and PDP tools fund jets across their whole life.
- ✦ A real lease ties every concept to a specific clause and schedule.
Your self-check score
Answer the checks as you go, then reveal your score.