Per Diem Deduction: The Tax Break Truckers Often Miss

What Is Per Diem?

Per Diem (Latin for "per day") is an IRS-approved deduction for meals and incidental expenses when you travel away from home overnight for work. For long-haul truck drivers, it's one of the most valuable — and most overlooked — tax breaks available.

Who Qualifies?

• Self-employed drivers (Owner Operators): Deduct directly on Schedule C
• Company drivers (W-2 employees): Currently cannot deduct unreimbursed business expenses on personal returns due to the 2017 tax reform suspension, unless the employer provides reimbursement
• Drivers under an SMLLC or S-Corp: Deduct through the business return

How to Calculate

The IRS publishes standard per diem rates annually. You have two methods:

• Simplified method: Use the IRS standard daily rate multiplied by the number of overnight travel days
• Actual expense method: Keep all meal receipts and deduct actual spending

Most truckers prefer the simplified method — it's easier and usually provides a solid deduction amount.

Key Considerations

• You must be away from your tax home overnight — same-day trips don't count
• Keep a driver's log or similar records to document your days on the road
• Per Diem reduces your Schedule C net profit, which lowers your self-employment tax
• However, it also reduces the Social Security wage base, which could slightly affect future benefits

Practical Tips

1. Record your departure and return dates for every trip
2. Use a simple spreadsheet or mobile app to track overnight days
3. List Per Diem as a separate line item when filing for easy review

FAQ

What are the two ways to calculate per diem, and which should I use?

The simplified method multiplies the IRS standard daily rate by your number of overnight travel days; the actual expense method has you keep every meal receipt and deduct actual spending. Most truckers use the simplified method because it's easier and usually provides a solid deduction — check the current IRS rate for the exact figure.

Can a W-2 company driver deduct per diem?

Generally not right now. The 2017 tax reform suspended the personal deduction for unreimbursed employee business expenses, so company drivers can't claim it unless their employer reimburses them. Self-employed Owner Operators deduct it directly on Schedule C, and drivers under an SMLLC or S-Corp deduct it through the business return.

Does a same-day trip qualify for per diem?

No. You have to be away from your tax home overnight for work — same-day trips don't count.

Does claiming per diem affect my future Social Security benefits?

It can, slightly. Per diem lowers your Schedule C net profit, which lowers your self-employment tax, but it also lowers the wage base that counts toward Social Security, which could modestly affect future benefits.

What records do I need to keep?

Keep a driver's log or similar record documenting your days on the road. It helps to record departure and return dates for every trip, track them with a spreadsheet or app, and list per diem as a separate line item when you file so it's easy to review.

This article is general tax education and does not constitute personalized tax advice. Please consult a qualified tax professional for your specific situation.