A business aircraft depreciation decision is one of the largest single deductions an owner will ever make, and one of the easiest to get wrong. The IRS gives you three distinct paths to depreciate that aircraft, and the wrong choice can reduce available tax benefits or increase IRS scrutiny.
Bonus depreciation lets you deduct 100% of a qualifying aircraft's cost in the first year it's placed in service. The One Big Beautiful Bill Act permanently restored the100% rate for property acquired and placed in service after January 19, 2025. There is no overall dollar cap, which is why this method dominates for multi-million-dollar business jets. Bonus depreciation applies automatically to qualifying property unless you elect out of it for that asset class.
Some owners elect out of bonus depreciation on a given asset class to preserve deductions for future years instead of taking the full deduction upfront.
If you don't accelerate the full cost into year one, whether by choice or because the aircraft doesn't qualify, depreciation falls back to the standard Modified Accelerated Cost Recovery System (MACRS). Aircraft typically depreciate over a 5-year or 7-year schedule under MACRS, spreading the deduction across multiple tax years instead of front-loading it.
Recovery periods generally follow how the aircraft is operated. Aircraft used primarily in business operations often qualify as five-year property, while aircraft used in commercial transportation of persons or property for compensation generally fall into the seven-year recovery period.
Aircraft fall under the IRS's listed property rules, which require contemporaneous logbooks tracking the split between business and personal use. A separate anti-abuse test under Section 280F(d)(6)(C)(ii) requires at least 25% of an aircraft's use to be qualified business use that excludes flights by a 5%-or-greater owner or a related party. This rule exists specifically to prevent owners from satisfying the business-use threshold through their own personal-convenience flights.
Check the Business-Use Threshold
Confirm that business use exceeds 50% under Section 280F. If qualified business use falls to 50% or less, the aircraft generally must be depreciated under ADS, spread over 6 or 12 years, rather than using accelerated methods such as Section 179 or bonus depreciation.
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Review Total Equipment Spending
Depreciation follows legal ownership rather than who operates the aircraft day to day. A lessee under a dry lease who directs the crew still doesn't hold the incidents of ownership. The lessor retains the benefit unless the lease is structured to transfer those incidents of ownership.
The 50% test isn't a one-time check. A drop to 50% or below in a later year triggers depreciation recapture, adding back the excess of accelerated depreciation over what straight-line ADS would have allowed. This applies even after the aircraft is fully depreciated.
It can. Placing an aircraft into charter service may reclassify it as transportation property, extending the MACRS recovery period from 5 years to 7 and potentially triggering recapture on depreciation already claimed.
Sometimes. Certain elections, including the Section 179 election and an election out of bonus depreciation, carry filing deadlines and may require an amended return or a formal accounting method change to correct after the fact. Owners should get advice before filing the first return after acquiring an aircraft.
The right method depends on business-use percentage, net income, total capital spending for the year, and how the aircraft fits into a broader ownership structure. Getting the entity structure wrong can undercut the tax benefit even when the depreciation method itself is chosen correctly.
As an aviation tax attorney, Rustin Diehl works with business owners and operators nationwide to structure aircraft ownership entities and align depreciation strategy with FAA compliance and long-term tax planning. Allegis Law's aircraft ownership and entity structuring services integrate that planning with FAA compliance from the start.
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