Calculate your 2024/2025 per diem tax deduction for meals & incidentals
A full per diem day is any 24-hour period you're away from your tax home. Partial days (departure and return days) are calculated at 75% of the full rate.
Your "tax home" is your regular place of business, not necessarily where your family lives. If you have no regular place of business, your home may be your tax home.
Transportation workers can deduct 80% of per diem (vs. 50% for most professions) due to DOT hours of service regulations limiting meal timing.