Part VI · Cases & Precedents · No. 05

Aircraft personal-use audits

In February 2024 the IRS announced an expanded compliance campaign targeting personal use of business aircraft. The campaign focuses on §280F listed-property substantiation, §274 entertainment-use disallowance, and the §4261 transportation excise on aircraft management arrangements — areas of long-standing IRS attention now amplified by flight-tracking data.

Facts and the audit pattern

The IRS audits aircraft personal use through several intersecting provisions. The recurring fact pattern: an operating business (closely held) owns a business jet. Executives and family members use the jet for both business and personal flights. The business deducts depreciation, fuel, crew, and operating costs. The IRS audit examines:

• Whether the §280F predominant-business-use test (more than 50%) is met in each year.
• Whether contemporaneous substantiation supports business-use claims.
• Whether §274 entertainment-use flights have been properly disallowed.
• Whether the company has properly imputed compensation to executives for personal-use flights.
• Whether management-company arrangements have produced uncollected §4261 transportation excise.

Issue

Section 280F requires that listed property (including aircraft used for personal transportation) be used more than 50% in qualified business use. Failure produces recapture of accelerated and bonus depreciation. Section 274 disallows deduction for entertainment-related flights. The interaction of these provisions with management-company-operated and time-share arrangements produces complex audit positions.

Outcome / IRS positions

The IRS announced in February 2024 ("Large Business and International Compliance Campaign on Business Aircraft Use") a coordinated examination program. Public reports indicate dozens of audits initiated immediately and many more contemplated. The program uses flight-tracking data from public sources (FAA registry, third-party flight trackers such as ADS-B Exchange) cross-referenced with corporate returns to identify mismatches.

Recurring deficiency issues:

• Disallowance of depreciation and operating costs allocable to entertainment-use flights.
• Imputation of additional compensation to executives.
• Assessment of §4261 transportation excise on management arrangements characterized as commercial transportation.
• Substantial-understatement penalties.

Reasoning

The IRS applies §280F substantiation rigor strictly. Logbook entries, calendars, manifests, and purpose codes are required. The 2017 amendments to §274 expanded the disallowance for entertainment expenses and tightened the rules for entertainment-aircraft flights. Sutherland Lumber-Southwest, Inc. v. Commissioner, 255 F.3d 495 (8th Cir. 2001), addressed the pre-TCJA framework for measuring imputed-income and disallowance amounts; post-TCJA the disallowance is broader.

Significance

The campaign has reshaped business-aircraft compliance practice:

• Logbook and flight-purpose documentation is now standard at higher rigor than historically.
• Imputation of additional compensation to executives for personal flights — under the SIFL (standard industry fare level) formula — has been routinized in many operations.
• Management agreements have been restructured to clarify operational-control allocation and excise-tax responsibility.
• Bonus-depreciation timing decisions on aircraft acquisition now factor in the heightened audit risk if subsequent personal use is material.

Subsequent treatment

The 2024 campaign continues through 2025-2026. Tax Court litigation on personal-use aircraft issues has produced ongoing case law on the §280F-§274-§4261 intersection. The IRS Compliance Campaign infrastructure suggests sustained attention; practitioners anticipate continued enforcement.

Reviewed May 2026