< Finsweet Attributes >
Tax deductions, credits, and amortization

What are the specific requirements for a lessor of commercial aircraft engines to claim bonus depreciation under Section 168(k) in 2025?

Last updated: 
Sep 2025
Blue J Answer
Blue J leverages the latest large language models and a vast and authoritative tax database to answer tax questions. The information provided does not, and is not intended to, constitute legal advice. Generative AI systems can make mistakes. Verify all important information.
Better Tax Answers For All Your Tax Questions

Ask Blue J any tax question, then go deeper. Follow up, add client-specific context, and explore the sources behind every answer with Blue J’s generative AI solution for tax research.

Table of Contents
Answer

To claim bonus depreciation under Section 168(k) for commercial aircraft engines as a lessor in 2025, several specific requirements must be met. The requirements are shaped by the Internal Revenue Code, Treasury Regulations, and recent legislative changes, including the One Big Beautiful Bill Act (OBBBA) and the Tax Cuts and Jobs Act (TCJA). Below is a comprehensive analysis of the requirements, with attention to the nuances for lessors of commercial aircraft engines.

1. Qualified Property Requirement

a. Recovery Period- The property must be “qualified property,” which includes tangible property depreciated under MACRS with a recovery period of 20 years or less. Commercial aircraft engines generally fall within this category, as they are tangible personal property with a class life less than 20 years.

b. Use in Trade or Business- The property must be used in a trade or business or held for the production of income. Leasing commercial aircraft engines to airlines or other commercial operators qualifies as a trade or business activity.

2. Original Use or Acquisition Requirement

a. Original Use- For property to qualify, the “original use” must begin with the taxpayer, or the acquisition must meet the requirements for used property. “Original use” means the first use to which the property is put, whether or not by the taxpayer. If the lessor purchases new engines and leases them, the original use begins with the lessor.

3. Acquisition and Placed-in-Service Date

a. Acquisition Date- For property acquired after January 19, 2025, the OBBBA restores 100% bonus depreciation for qualified property, including commercial aircraft engines.

b. Placed-in-Service Date- The engine must be placed in service by the lessor in 2025 or later. “Placed in service” means the property is ready and available for its intended use (i.e., available for lease).

c. Binding Contract Rule- If the property is acquired under a binding contract entered into before January 20, 2025, the phase-down rates (40% for 2025) may apply instead of 100%. Only property acquired after January 19, 2025, and not under a pre-existing binding contract, is eligible for 100% bonus depreciation.

4. Exclusions and Special Rules

a. Alternative Depreciation System (ADS)- Property required to be depreciated under ADS is not eligible for bonus depreciation. ADS is required for property used predominantly outside the United States, tax-exempt use property, tax-exempt bond-financed property, imported property subject to an Executive Order, and property for which the taxpayer elects ADS.- For commercial aircraft engines, if the engines are used predominantly outside the U.S. or are tax-exempt use property, ADS applies and bonus depreciation is not available.

b. Listed Property Rules- Aircraft and aircraft engines are “listed property.” To claim bonus depreciation, the property must be used more than 50% in a qualified business use (i.e., leasing to commercial operators for business purposes).- If business use falls to 50% or less, bonus depreciation is disallowed, and any excess depreciation must be recaptured.

c. Related Party and Carryover Basis Rules- The property must not be acquired from a related party, and the basis must not be determined by reference to the transferor’s basis (i.e., not acquired in a nonrecognition transaction).

d. Election Out- The lessor may elect out of bonus depreciation for any class of property placed in service during the year. This election is made on a timely filed tax return and is irrevocable for that class of property for the year.

5. Documentation and Substantiation

  • The lessor must maintain detailed records substantiating:
  • The acquisition and placed-in-service dates.
  • The original use or acquisition requirements.
  • The business use percentage (must be >50% for listed property).
  • The cost and basis of the engine.
  • The method and recovery period used.
  • Any elections made (e.g., election out of bonus depreciation).

6. Recapture Rules

  • If the engine ceases to be used predominantly in a qualified business use or is disposed of, any gain up to the amount of bonus depreciation previously claimed is recaptured as ordinary income under Section 1245.

7. Summary Table of Key Requirements

RequirementDetails
Property TypeTangible property with MACRS recovery period ≤ 20 years (commercial aircraft engines qualify)
UseMust be used in a trade or business (leasing to commercial operators)
Original Use/AcquisitionOriginal use must begin with lessor, or used property rules must be met (not previously used by lessor, not from related party, not carryover basis)
Acquisition/Placed-in-ServiceAcquired and placed in service after January 19, 2025, for 100% bonus; otherwise, phase-down rates may apply
ADS ExclusionNot eligible if required to use ADS (e.g., used predominantly outside U.S., tax-exempt use, etc.)
Listed PropertyMust be used >50% in qualified business use
Related Party/Carryover BasisNot acquired from related party, not carryover basis
Election OutMay elect out for any class of property for the year
DocumentationMust maintain detailed records substantiating all requirements
RecaptureOrdinary income recapture if business use drops ≤50% or on disposition

8. Special Considerations for Lessors

  • Leasing to Commercial Operators: Leasing to airlines or other commercial operators is a qualified business use, provided the use is not predominantly outside the U.S. and is not to a tax-exempt entity in a disqualified lease.
  • Short-Term Leases: If the lease term is less than 3 years and less than 30% of the class life, the property may not be treated as tax-exempt use property, which would otherwise require ADS.
  • Business Use Test: The lessor must ensure that the engine is used more than 50% in a qualified business use during the year it is placed in service and throughout the recovery period to avoid recapture.

9. Conclusion

A lessor of commercial aircraft engines can claim 100% bonus depreciation under Section 168(k) in 2025 if:- The engine is tangible property with a MACRS recovery period of 20 years or less.- The engine is acquired and placed in service after January 19, 2025 (and not under a pre-existing binding contract).- The original use begins with the lessor, or the used property rules are satisfied.- The engine is not required to be depreciated under ADS (i.e., not used predominantly outside the U.S., not tax-exempt use property, etc.).- The engine is used more than 50% in a qualified business use (leasing to commercial operators).- The property is not acquired from a related party or in a carryover basis transaction.- The lessor does not elect out of bonus depreciation for that class of property.- All substantiation and documentation requirements are met.

Failure to meet any of these requirements will disqualify the engine from bonus depreciation or may trigger recapture if the requirements are not maintained throughout the recovery period.

Table of Contents

Was this answer helpful?

Go beyond the search box and discover how Blue J makes tax research as quick and easy as asking a colleague.

What Tax Professionals Are Saying

"Blue J is already delivering great results. We are excited to partner with Blue J on this initiative."

Sarah Chen
Senior Tax Manager
Regional Accounting Firm
$37,000+ in tax savings found

“Blue J will expand our generative AI capabilities to give our team members access to high-quality, quickly accessible data and effective research tooling, which, when coupled with their own personal expertise and experience, will unlock new insights with seamless efficiency. Our teams will tap Ask Blue J to discover the best tax law and insights to apply to their clients' individual situations, and in so doing, will enhance their own expertise. We view this collaboration as a win for both our clients and our people."

Sarah Chen
Senior Tax Manager
Regional Accounting Firm
$37,000+ in tax savings found

What Blue J customers are saying

Darin K. Seal

“We are excited to use Blue J to elevate the initial work product our team is able to produce."

"We’re incorporating Blue J to ensure our people are well-equipped with a research tool that delivers on both ease of use and quality of deliverable. It will save us a lot of time as a starting point, so we can focus our efforts on the analysis. Ultimately, it helps us get to the right answer, faster.”

"We’re incorporating Blue J to ensure our people are well-equipped with a research tool that delivers on both ease of use and quality of deliverable. It will save us a lot of time as a starting point, so we can focus our efforts on the analysis. Ultimately, it helps us get to the right answer, faster.”

Read More
Darin K. Seal, Partner In Charge of the Tax Department
HMV CPAs
Matt Mueller

"We had used Checkpoint for a long time but found it wasn’t particularly well-used in our practice."

"A lot of our practitioners would have to turn to Google to find what they were looking for, which of course isn’t ideal. Blue J is a real game-changer when it comes to this, since it combines the efficiency of Google with the authoritative tax materials our people really need to serve their clients best. At ELO, we pride ourselves on providing services that are focused on value for clients and exceeding their expectations. Adding Blue J to our toolbox will enable us to do just that, as we continue to evolve our service offerings to better serve our clients’ needs.”

"A lot of our practitioners would have to turn to Google to find what they were looking for, which of course isn’t ideal. Blue J is a real game-changer when it comes to this, since it combines the efficiency of Google with the authoritative tax materials our people really need to serve their clients best. At ELO, we pride ourselves on providing services that are focused on value for clients and exceeding their expectations. Adding Blue J to our toolbox will enable us to do just that, as we continue to evolve our service offerings to better serve our clients’ needs.”

Read More
Matt Mueller, Partner and Tax Practice Leader
ELO CPAs
David L. Phelps

"We find this tool to be a game-changer for us and our clients.”

“We had the opportunity to pilot some other AI solutions in the market, and found that the improvement over traditional search was limited - except in Blue J’s case, where the efficiency gain over traditional research methods is significant."

“We had the opportunity to pilot some other AI solutions in the market, and found that the improvement over traditional search was limited - except in Blue J’s case, where the efficiency gain over traditional research methods is significant."

Read More
David L. Phelps, Tax Director
Barnes Dennig
Mathew Talcoff

“Blue J is an exciting technology because it enables the practitioner to remain in the driver’s seat of the analysis."

"Thoughtful functions are included to encourage and facilitate deeper analysis, not to replace or reduce it. We’ll continue to find new and impactful ways to leverage the technology, which has benefited our clients and staff alike. At RSM we strive to be compelling to our clients and to be digital by embracing new technologies to fulfill that promise.”

"Thoughtful functions are included to encourage and facilitate deeper analysis, not to replace or reduce it. We’ll continue to find new and impactful ways to leverage the technology, which has benefited our clients and staff alike. At RSM we strive to be compelling to our clients and to be digital by embracing new technologies to fulfill that promise.”

Read More
Mathew Talcoff, Partner and Washington National Tax Leader
RSM US
Tanya Silves

"We wanted to have a tool that people were using at all staff levels."

"We wanted something that lived up on their third screen - something that would be available and helpful to them every day. What we've found is it's been easy to get people to get into the habit of using Blue J because it helps people. Blue J allows us to quickly respond to client questions in a way that they can understand it, which helps us deal with the volume of client questions that come in. We were up and running very quickly with Blue J - within 5 minutes, our staff understood how this will be helpful, and the rest of the training program is refining prompting skills and building use cases and best practices."

"We wanted something that lived up on their third screen - something that would be available and helpful to them every day. What we've found is it's been easy to get people to get into the habit of using Blue J because it helps people. Blue J allows us to quickly respond to client questions in a way that they can understand it, which helps us deal with the volume of client questions that come in. We were up and running very quickly with Blue J - within 5 minutes, our staff understood how this will be helpful, and the rest of the training program is refining prompting skills and building use cases and best practices."

Read More
Tanya Silves, Partner & Tax Director
Larson Gross

Ready to Transform Your Tax Research?

Join thousands of tax professionals who save hours every week with our AI-powered research.