Mileage Log Completeness Checker
Review an existing mileage file for missing trip fields, invalid distances and possible duplicate rows.
Interactive — edit any field
What the Checker Reviews
The checker maps your CSV columns to dates, destinations, business purposes and distances, then flags rows that need review without changing your original file.
Common mistakes to avoid
- A field check cannot verify that a trip occurred or was recorded at the time.
- Candidate duplicates remain in the supplied-distance total until you review them.
- Keep total annual vehicle miles separately; the maximum odometer value in a trip file is not an annual total.
Frequently asked questions
Does the checker upload my mileage file?
No. Parsing and review happen in this browser, and the checker does not save the file contents.
Does a report without flags prove an IRS deduction?
No. Deductibility and adequate supporting records require facts a file parser cannot establish.
Sources
We prioritize primary sources for rules, formulas, rates, limits, and definitions. See our calculator methodology and editorial policy.