Keep adjusted tax basis, supported market value and lender payoff separate. Establish ownership, eligible cost, service date, use and the applicable asset class before selecting depreciation treatment.
What aircraft depreciation actually measures
Aircraft depreciation has two meanings that buyers should keep separate. Market depreciation is a change in what a particular aircraft could sell for. Tax depreciation is the recovery of eligible cost under the rules applicable to a taxpayer and its use of the property. Neither calculation tells you the outstanding loan balance. A useful purchase plan therefore maintains three independent records: supported market value, adjusted tax basis and the lender's current payoff.
For federal tax purposes, IRS Publication 946 explains that depreciation generally concerns property used in a business or income-producing activity, with a determinable useful life extending beyond one year. An aircraft used only for personal recreation does not become depreciable business property because its owner financed it or formed an LLC. Establish who owns the property for tax purposes and how it is actually used before choosing a deduction method. IRS Publication 946: basis, 2026 limits and aircraft use
This guide explains a planning process, not an individual return calculation. The examples use invented prices and financing balances. State rules, entity-level limits, personal use, prior deductions and actual acquisition documents require separate analysis. Begin with these distinctions rather than an assumed annual percentage decline or a promise that the tax deduction will fund the airplane.
Establish cost, ownership and the service date
Start a basis file containing the purchase agreement, settlement statement, invoice, payment evidence and allocation of separately identified items. Publication 946 describes cost as including amounts paid through cash, debt and other property, with adjustments for applicable acquisition costs. A down payment is therefore not automatically the aircraft's entire depreciable basis. Conversely, every closing-account withdrawal does not automatically belong in aircraft basis. Classify each item with the tax preparer.
The placed-in-service date also needs evidence. The IRS describes property as placed in service when it is ready and available for its specific use. Signing a note, making a deposit or taking a photograph before year-end does not, by itself, settle that question. Record the actual delivery, availability, intended business activity and any outstanding work that affects readiness. IRS Publication 946: basis, 2026 limits and aircraft use
Ownership structure does not replace this analysis. Identify the legal owner, borrower, operator and taxpayer, including any disregarded entity or other tax classification. A business paying an aircraft expense is a fact to document, not proof that every passenger's trip qualifies. Our LLC and business financing guide helps organize the different parties before a financing conversation.
Classify the aircraft before choosing a recovery period
There is no universal five-year depreciation answer for every aircraft activity. IRS Publication 946 Appendix B distinguishes asset classes and lists different General Depreciation System and Alternative Depreciation System recovery periods. The following are selected table entries, not an assignment of an actual purchase to a class. The descriptions and exceptions matter as much as the numbers. IRS Publication 946 PDF: selected aircraft asset classes and recovery periods
| Selected class | Scope to investigate | GDS years | ADS years |
|---|---|---|---|
| 00.21 | Airplanes, including airframes and engines, except commercial or contract passenger/freight carrying; all helicopters, including airframes and engines | 5 | 6 |
| 45.0 Air Transport | Assets, except helicopters, used in commercial and contract passenger/freight carrying by air, subject to the table's full definitions and exceptions | 7 | 12 |
These entries come from Tables B-1 and B-2. The tables also contain a separately defined, restricted Air Transport class with a historical acquisition condition. Do not use the simplified comparison to override that condition or other applicable rules. A marketing label such as business aircraft, a model name or a flight-rule reference alone is insufficient to determine the tax classification.
The distinction between GDS and ADS is also substantive. ADS is not simply another name for six-year airplane depreciation. Ask the preparer which system applies, why it applies and which asset-class description supports the recovery period. Keep that reasoning with the depreciation schedule so a later sale review does not begin with an unexplained number copied from an online calculator.
Select the method and apply qualified-use rules
Publication 946 describes declining-balance and straight-line methods within the depreciation framework. Under the applicable declining-balance approach, a switch to straight line can occur when that method produces an equal or greater deduction. An initial election, an automatic switch within a method and a change in accounting method are different questions. Do not replace the schedule by informally dividing its remaining balance over a preferred number of years. IRS Publication 946: basis, 2026 limits and aircraft use
Aircraft are also subject to listed-property and qualified-business-use rules. The familiar more-than-50-percent test is not a blanket rule that every aircraft expense becomes deductible whenever a logbook shows mostly business hours. Publication 946 discusses additional aircraft-use treatment involving a 25-percent test and particular related-party or compensatory uses. Passenger and purpose evidence can matter. Have those provisions applied to the actual facts rather than treating a single annual percentage as a complete eligibility analysis.
Maintain contemporaneous information on the flight, participants, business purpose and relevant costs. IRS Publication 463 emphasizes adequate records and substantiation and discusses restrictions involving entertainment facilities, including airplanes. A client relationship, an invoice description or reported compensation does not automatically resolve every limitation. The planning objective is a defensible record, not the largest percentage that can be entered into a spreadsheet. IRS Publication 463: expense evidence and entertainment limits
Understand accelerated deductions without confusing them with cash
Section 179, additional first-year depreciation commonly called bonus depreciation, and regular depreciation are distinct mechanisms. Their ordering, limits, elections and eligible basis must be considered together. A deduction is not a dollar-for-dollar refund and does not extinguish debt. The amount and timing of any actual cash-tax benefit depend on the taxpayer's complete situation.
IRS Notice 2026-11 addresses the restored 100-percent additional first-year framework for qualifying property acquired and placed in service after January 19, 2025, including acquisition-date issues involving binding contracts. That framework does not make every 2026 aircraft purchase fully deductible. Use our current bonus depreciation and Section 179 guide for the dated planning questions, then have the actual transaction reviewed. IRS Notice 2026-11: restored bonus depreciation framework
A financing budget should first work with no assumed immediate tax cash. Model a separately supported benefit only when its amount, timing and recipient are established. This is particularly important if the taxpayer claiming depreciation differs from the person or entity making loan payments. A projected tax benefit held elsewhere does not automatically satisfy the aircraft owner's next payment.
An original example: price change, equity and sale cash
Assume a fictional aircraft purchase of $240,000, funded with $60,000 cash and a $180,000 loan. At a later sale date, assume the lender's actual payoff would be $130,000 and cumulative principal payments were $50,000. The buyer's purchase-price capital contributed so far is $110,000: the original $60,000 plus $50,000 principal. This deliberately simplified example excludes interest, operating costs, taxes, timing and other capital work.
Assume $6,000 selling costs in each of three invented sale scenarios. Net cash before tax equals sale price less selling costs and payoff. These are sensitivity inputs, not aircraft appraisals or a prediction that any particular model appreciates or depreciates by these amounts.
| Assumed sale price | Price change from purchase | Cash after costs and payoff | Cash less purchase-price capital contributed |
|---|---|---|---|
| $270,000 | +$30,000 | $134,000 | +$24,000 |
| $220,000 | −$20,000 | $84,000 | −$26,000 |
| $180,000 | −$60,000 | $44,000 | −$66,000 |
The final column reconciles the sale proceeds to purchase-price capital, not total investment return. Calling the first row a $24,000 ownership profit would omit the excluded expenses. Calling the middle row an $84,000 profit would additionally confuse returned equity with earnings. The tax schedule could show a very different adjusted basis in every row, independent of the payoff used here.
Update the exit plan when use or value changes
Request aircraft-specific valuation evidence as the sale approaches. AOPA Finance discusses configuration, condition, time and other characteristics that affect value; spending on an aircraft is not automatically recognized dollar for dollar by the market. Maintain separate estimates for asking price, supported value and likely net proceeds. A tax recovery period does not forecast any of them. AOPA Finance: aircraft-specific valuation inputs
A sale can also create taxable gain even when the selling price is below the original purchase price, because prior depreciation reduces adjusted basis. IRS Publication 544 explains amount realized, adjusted basis and depreciation recapture. A reduction in qualified use can raise a different recapture question before a sale. Review both events rather than assuming that keeping the airplane through an arbitrary anniversary resolves all future consequences. Our tax and resale reconciliation develops a separate gain-versus-sale-cash example. IRS Publication 544: basis, gain and depreciation recapture
Aircraft depreciation questions
Can I depreciate an aircraft I use for business?
Possibly, if the taxpayer, property, business or income-producing use and applicable depreciation rules qualify. Business use does not establish a deduction for personal activity. Assemble ownership, basis, service-date and use evidence before selecting the system or accelerated deduction. Publication 946 is the starting federal reference.
What is the business-use requirement?
It depends on the provision and actual aircraft use. More-than-50-percent qualified business use matters for certain accelerated treatment, and aircraft-specific 25-percent and related-party or compensatory-use rules can also matter. An annual hours estimate alone does not resolve those tests or entertainment limitations; have the underlying flight and passenger facts evaluated.
What is depreciation recapture?
It is a tax consequence that can arise under specified disposition or changed-use rules after depreciation benefits. On a qualifying Section 1245 sale, relevant depreciation and recognized gain affect the ordinary-income recapture calculation. It is not automatically a fixed percentage of the selling price or the loan payoff.
Is this the same as bonus depreciation?
Bonus depreciation is one accelerated depreciation provision, not the definition of depreciation generally. Regular depreciation, Section 179 and bonus treatment have different rules and interact through eligible basis and ordering. None determines the market value or cancels the financing balance.
Prepare a financing file that keeps the calculations separate
Bring the purchase documents, proposed ownership structure, supported operating budget, financing terms and tax questions to the appropriate professionals. Our loan-rate guide addresses borrowing inputs, while the ownership-cost guide builds the cash budget beyond the payment. Use the article library for related diligence and contact Jaken Aviation with the actual financing request. The goal is a purchase that remains understandable when the tax schedule, market estimate and bank statement are placed beside one another.