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Financial research concept

Aircraft Lessor Aircraft Order Book

measures future aircraft purchase commitments that can expand or refresh a lessor's fleet, while creating funding and delivery exposure before those aircraft generate lease income.

By Lee BaileyPublished Sep 28, 2026
Research context

See what supports this page, how current it is, and where comparable or historical context is available.

Research date
Sep 28, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context
13 connected conceptsPart of the reviewed Aircraft Leasing Economics; issuer definitions remain distinct where disclosed.
Company examples
1 reviewed companyRelationships reflect supported examples, not a normalized cross-company KPI ranking.
  1. An order book is an asset pipeline, not revenue backlog
  2. Deliveries can refresh the fleet before they grow it
  3. Part of the Aircraft Leasing Economics
  4. See It in Company Research
  5. Continue Research

An aircraft lessor aircraft order book is the pipeline of aircraft the lessor has committed to buy from manufacturers but has not yet taken delivery of. AerCap had 283 new aircraft on order at December 31, 2025, with committed deliveries scheduled through 2031.

An order book is an asset pipeline, not revenue backlog

The distinction matters. An aircraft order is a future capital commitment. It can become a leased asset that produces basic lease rents, but the order itself isn't contracted revenue and doesn't guarantee a future lessee will remain in place through delivery.

AerCap explicitly says the purchase commitments require substantial payments. Funding can come from debt facilities, banks, capital markets, unrestricted cash, or asset sales.

That makes the order book part of both the growth story and the financing plan.

Deliveries can refresh the fleet before they grow it

In 2025 AerCap purchased 71 fuel-efficient new-technology owned aircraft while also selling 108 owned aircraft with an average age of 15 years. New deliveries therefore do more than add tail count. They can replace older equipment and change weighted average fleet age, residual-value exposure, lease rates, and maintenance needs.

This is why a large order book shouldn't be interpreted as a one-for-one forecast of fleet growth.

Manufacturer delays can move the economics too. Aircraft leasing sits downstream from a concentrated manufacturing base. AerCap notes that delivery delays can postpone asset deployment and, for sufficiently long delays, can give some lessees cancellation rights under future lease commitments.

For investors, the useful questions are how much capital is committed, when deliveries are scheduled, how much is already placed with lessees, and whether incoming aircraft are expanding the fleet or replacing older assets.

Primary source: AerCap 2025 Form 20-F.

Part of the Aircraft Leasing Economics

Connect aircraft deployment and recurring lease revenue with financing spread, depreciation, maintenance obligations, residual-value realization, and fleet renewal.

Browse the full operating model in Company Analysis →
Where this concept fits
  • Fleet renewal and residual-value realizationCurrent relationship
    The order book supplies the future aircraft pipeline, value-weighted fleet age shows how renewal changes the owned passenger portfolio, and gains on asset sales show realized residual-value outcomes from aircraft and other flight-equipment disposals.
    Aircraft Order BookCurrent conceptNet Gain on Sale of AssetsWeighted Average Fleet Age
  • Asset deployment, recurring rent, and financing spread
    Utilization shows how much owned aircraft value is deployed, basic and maintenance rents separate recurring lease economics from maintenance-related receipts, average lease assets supply the capital denominator, and the two net-spread measures show financing economics before and after depreciation and amortization.
    Annualized Net SpreadAverage Lease AssetsBasic Lease RentsMaintenance RentsNet Spread After DepreciationOwned Aircraft Utilization
  • Maintenance condition and acquired-lease accounting
    Maintenance rights capture acquired contractual maintenance condition, accrued maintenance liabilities capture timing and reimbursement obligations, end-of-lease compensation settles aircraft condition at redelivery, and lease premium captures acquired above-market rents that are amortized against lease revenue.
    Accrued Maintenance LiabilityEnd-of-Lease CompensationLease PremiumMaintenance Rights

See It in Company Research

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