Private Jet Tax Break: Depreciation, Business Use, and Audits

The private jet tax break that gets the most attention is bonus depreciation: a business that buys a qualifying aircraft can deduct the entire purchase price in the first year, on top of yearly deductions for fuel, crew, maintenance, insurance, and hangar costs. The condition attached to all of it is that the aircraft must be used more than 50% for business, every year, with contemporaneous flight logs to prove it. Miss that threshold in a later year and the IRS claws back the accelerated deductions already taken. An audit campaign the agency launched in 2024 is aimed squarely at owners who take the deduction but treat the logbook as an afterthought.

The 100% First-Year Write-Off

The One Big Beautiful Bill, signed in 2025, restored 100% first-year bonus depreciation for qualifying business property, including aircraft placed in service after January 19, 2025.¹ A company that buys a $20 million jet and puts it in service in 2026 can deduct the full $20 million that year rather than recovering the cost across a multi-year schedule.

That reversed a phase-down already underway. Under the Tax Cuts and Jobs Act, bonus depreciation had dropped from 100% to 80% in 2023, 60% in 2024, and 40% in 2025, and was headed to zero by 2027. The new law amends Section 168(k) to set the rate permanently at 100% and strikes the prior expiration dates.² “Permanently” carries the usual caveat that Congress can revisit the code, but there is no built-in sunset this time.

Both new and used aircraft qualify, as long as the aircraft is new to the taxpayer claiming the deduction. For the first tax year ending after January 19, 2025, buyers can also elect to deduct 60% rather than the full 100% on certain aircraft, which can produce a better overall result when spreading the deduction across years matters more than front-loading it.³

Operating Costs You Can Deduct Every Year

Separately from the aircraft itself, the tax code allows a deduction for all ordinary and necessary expenses of running the plane as part of a trade or business.⁴ These fall into two categories.

Immediately deductible in the year paid: aviation fuel, hangar fees, insurance premiums, routine maintenance, mandatory inspections, crew salaries, and pilot training. Lease payments for hangars or other facilities the business uses but does not own are also deductible under Section 162.⁴

Major upgrades are treated differently. Installing a new avionics suite or completely refurbishing the cabin extends the aircraft’s useful life, so those costs get capitalized and recovered through depreciation rather than deducted at once. The IRS draws the repair-versus-improvement line by asking whether the work adapts the aircraft to a new use, makes it materially better, or restores it to a like-new condition.

The 50% Business Use Test

None of the above is available unless the aircraft passes the predominant use test. Under Section 280F, the aircraft must be used for qualified business purposes more than 50% of the time during each tax year.⁵ Drop below 50% and the aircraft loses eligibility for both bonus depreciation and standard accelerated depreciation (MACRS). The owner must instead use the Alternative Depreciation System, which spreads the cost over 6 years for non-commercial aircraft or 12 years for commercial aircraft on the straight-line method.

Calculating that percentage gets complicated when company insiders fly on the plane. Section 280F excludes several situations from “qualified business use” even though they look business-related. Using the aircraft as compensation for a 5% owner or a related person does not count. Neither does leasing the aircraft to a 5% owner. Using it as compensation for any other employee counts only if the value is included in that employee’s gross income and properly withheld.⁵ A special aircraft exception restores those uses to the qualified column as long as at least 25% of total annual use is genuine business use outside the restricted categories.

What Recapture Looks Like When Business Use Slips

The 50% test is not a one-time hurdle. It applies every year, and failing it in a later year triggers depreciation recapture. If the aircraft cleared 50% when placed in service but falls below in a subsequent year, the owner reports recapture income equal to the difference between the accelerated depreciation already claimed and what the Alternative Depreciation System would have allowed from the start.⁵

For an aircraft that took 100% bonus depreciation in year one, the recapture number can be enormous. And the consequences are permanent: once business use drops below 50% in any year, the aircraft is stuck on the Alternative Depreciation System for that year and every year after, with no path back to accelerated depreciation even if business use rebounds.⁵ This is where the largest owner mistakes happen. Full first-year deduction, gradual creep of personal flights, seven-figure recapture bill a few years later.

Entertainment Flights Are Not Deductible

Even when the aircraft clears 50% overall, individual flights used for entertainment are separately disallowed. Section 274 prohibits deductions for expenses related to entertainment, amusement, or recreation.⁶ After the Tax Cuts and Jobs Act, the prior 50% deduction is gone; all entertainment-related aircraft expenses are now fully disallowed. Flying to a client golf outing, a hunting trip, or a resort counts as entertainment even when business discussions happen during the trip.

A narrow exception allows a deduction to the extent the cost is treated as taxable compensation to the employee who took the flight, with proper withholding. For “specified individuals” (officers, directors, and 10%-or-greater owners), even that exception is capped. The deduction cannot exceed the amount actually included in the individual’s income, which is typically calculated using the SIFL formula and is almost always far less than what the flight actually cost.⁶ In practice, entertainment flights by company insiders produce almost no deduction.

Personal Flights Create Taxable Income

When an employee or executive uses a company aircraft for personal travel, the flight is a taxable fringe benefit. Its value must be reported as income to the person who took the trip.⁷ The IRS accepts two valuation methods: fair charter value (what a comparable charter from an unrelated company would cost) or the Standard Industry Fare Level (SIFL) formula.

Most employers use SIFL because the number is far lower. SIFL adds a per-flight terminal charge to a distance-based mileage rate that steps down for longer flights. For the first half of 2026, the terminal charge is $54.48, with mileage rates of $0.2980 for the first 500 miles, $0.2272 for miles 501 through 1,500, and $0.2184 beyond 1,500 miles. The IRS updates these rates every six months. A cross-country personal flight on a jet that costs $15,000 per hour to operate might produce only a few hundred dollars of SIFL income. That gap is exactly why Section 274 caps the compensation exception for specified individuals at the SIFL amount rather than actual cost.

If the employer fails to report personal flight income, the IRS can step in and value the flight at fair charter value instead of SIFL, dramatically increasing the taxable amount.⁸

Flight Logs Are the Whole Ballgame

Every deduction and every income calculation above depends on one thing: a detailed, contemporaneous flight log. The IRS requires records showing the date of each flight, the departure and destination airports, and the names of all passengers on each leg.⁹ Each leg must also include the business purpose and the business relationship of every passenger.

Vague entries like “client meeting” fall short. The log should identify the specific client, what the meeting was about, and how it relates to the business. The IRS accepts four methods for allocating costs between business and personal use: flight-by-flight hours, flight-by-flight miles, occupied seat miles, and occupied seat hours. Whichever method a taxpayer picks must be applied consistently across all aircraft for the whole tax year.

Without adequate logs, the consequences compound. The IRS can reclassify flights as personal, which simultaneously disallows the expense deduction, potentially pushes business use below 50% and triggers recapture, and creates unreported fringe benefit income for the passengers. A 20% accuracy-related penalty applies to underpayments involving negligence or a substantial understatement of income.¹⁰ For fraud, the penalty is 75% of the underpayment attributable to the fraudulent conduct.¹¹

The 2024 IRS Audit Campaign

In February 2024, the IRS announced a dedicated audit initiative targeting business aircraft use by large companies and high-net-worth individuals. The campaign focuses on three questions: whether personal travel expenses are being kept out of business deductions, whether personal flights are being reported as taxable income to the people who took them, and whether recordkeeping meets the standards above. It began with dozens of audits and was designed to expand as findings came in.

The practical effect is a higher audit risk than in prior years, with examiners now working from standardized practice units that spell out exactly what documentation to request. Owners who have been informal about flight logs, or fuzzy about the business purpose of particular trips, are the ones most exposed. The combination of large dollar amounts, precise documentation rules, and an active enforcement team means loose compliance is more likely to be caught than it has been in years.

1
Internal Revenue Service. One Big Beautiful Bill Provisions
2
Office of the Law Revision Counsel. 26 USC 168 – Accelerated Cost Recovery System
3
Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill
4
Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses
5
Office of the Law Revision Counsel. 26 USC 280F – Limitation on Depreciation for Luxury Automobiles; Limitation Where Certain Property Used for Personal Purposes
6
Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment, Etc., Expenses
7
eCFR. 26 CFR 1.61-21 – Taxation of Fringe Benefits
8
Internal Revenue Service. 2026 Publication 15-B – Employers Tax Guide to Fringe Benefits
9
Internal Revenue Service. Allocation Methods of Personal Use of Aircraft
10
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
11
Office of the Law Revision Counsel. 26 US Code 6663 – Imposition of Fraud Penalty