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Diesel mechanics tax write-offs

Varies

What Can Diesel mechanics Write Off?

Short answer: Employed diesel techs can't deduct tools federally; independent and mobile diesel mechanics deduct service trucks, diagnostic software, and heavy tools.

W-2 employees can't deduct unreimbursed job expenses on a federal return through at least 2026 (the miscellaneous itemized deduction is gone); ask your employer for an accountable-plan reimbursement instead.

Records to keep: Keep receipts, 1099s or W-2s, a mileage log, and a note of the business purpose for each expense.