More than 50% qualified business use
The aircraft must be used for qualified business purposes more than 50% of the time in the year placed in service and every year thereafter.
- Counts: revenue flights, business meetings, site visits, client transportation, and similar commercial activity
- Doesn’t count: personal flights, recreational use, and travel unrelated to business operations
The measurement is usage hours, not calendar days. Log the purpose of every flight from delivery forward. The IRS does not accept reconstructed records or estimates.