Every business mile you drive is worth money back at tax time, but only if you can prove you drove it. That’s what a mileage log is for: a simple, ongoing record that turns your driving into a deduction the IRS will actually accept.
What the IRS Actually Requires in a Mileage Log
A mileage log is only useful if it captures what the IRS asks for, and the requirement is refreshingly specific. For the longer version, our guide covers what the IRS actually requires in a mileage log alongside the full calculation.
Under IRS Publication 463, a business mileage log should include, for each trip:
- Date of the business trip
- Destination. A city, general area, or specific address all work. “Out of town” does not.
- Business purpose, specific enough to connect the drive to your work. Think “showing at 445 Oak Ave, buyer clients” or “client meeting, Acme Corp Q3 proposal,” not just “work.”
- Miles driven. Total trip miles are fine. Odometer readings are optional but welcome.
Log it while it’s fresh. The IRS wants records made “at or near the time” of the trip. In plain terms, that means a log recorded at or near the time you drove it, not one you rebuild from a calendar weeks or months later. That single rule is the reason an easy tracking habit matters so much.
Your Free Mileage Log Template
Need a simple mileage log template you can use right away? Here’s the link to download our free mileage log template. This mileage tracker spreadsheet works as a printable mileage log sheet, mileage log template excel file, or a mileage tracker template, whichever format you’re most comfortable with. The format lines up with the fields IRS Publication 463 requires for the standard mileage method. Multiply your total business miles by the 2026 IRS mileage rate to turn the log into a dollar figure.
Here’s a template you can use to start logging your miles. The link above is a downloadable version that will add up your total miles for you.
| Date | Destination | Business Purpose | Miles | Odometer Reading Start/EndOdometer |
|---|---|---|---|---|
| 3/14 | 445 Oak Ave, Springfield | Showing, buyer clients | 18.4 | 12,048 / 12,066 |
Top row is an example, shown in gray. Delete it before you print or copy this.
Tips for filling it out correctly:
- Log each trip at or near the time you make it. The IRS wants a contemporaneous record, meaning one recorded at or near the time you drove it.
- Be specific on business purpose. “Client meeting re: Q3 proposal, Smith Consulting” beats “work meeting” every time.
- One row per trip, not per day. Three separate business drives on Tuesday means three rows.
- Keep the log with your tax records for at least 3 years after filing.
Where Paper and Spreadsheet Logs Break Down
A printed or spreadsheet log works beautifully, as long as you actually fill it out. Here is where the system tends to fall apart:
You forget. The “at or near the time” rule exists because memory fades. The longer you wait to log a trip, the shakier the details get.
It’s tedious. At year-end you are hand-adding rows, multiplying by the rate, and reformatting the whole thing into something your tax professional can use.
No running total. A handwritten log won’t show you how much your deduction has grown. You only learn the number when you sit down and do the math in April.
The Faster Way: Let FuelMath Build Your Log
FuelMath turns a sentence into a logged trip. You describe the drive in plain language, FuelMath reads the details, and a trip card appears filled in with the date, where you started, where you went, the miles, the purpose, and an estimated deduction at the current rate. You glance it over and tap save. That’s it. Log a trip in seconds, and it builds the same record without handing over a location trail.
Instead of filling in a five-column table, you just type:
FuelMath fills in a dated trip card, you confirm it looks right, and your running deduction total updates the moment you save. No rows to hand-fill, no miles to calculate yourself, no reformatting before tax time. On FuelMath Pro you can skip the typing entirely and just say the trip out loud, hands free.
Compare that to the template above: for every drive, you would be writing the date, looking up the address, estimating the distance, and doing the multiplication by hand. FuelMath does the fiddly parts and leaves you the easy part, a quick review and a tap.
The date-stamp advantage: every FuelMath entry is stamped with the date you enter it, which supports the kind of at-or-near-the-time record the IRS is looking for.
And because privacy is built in, FuelMath does none of this by tracking you. There’s no GPS following your car around, and your data is never sold.
At tax time, FuelMath Pro exports a clean PDF or CSV, already totaled, sorted by date, every entry date-stamped. Hand it to your tax professional or drop it into common tax software.
Paper Template Versus FuelMath: When Each Makes Sense
- You’re disciplined about logging in real time rather than reconstructing later
- You don’t need to share the log or export it
- You genuinely like keeping paper records
- You want eyes on your running deduction total without doing the math
- You want a date-stamped record made at or near the time you drove
- You need a formatted report to send a tax professional or employer (FuelMath Pro)
- You want mileage and expenses like meals, parking, and supplies in one place (FuelMath Pro)
What FuelMath Costs
Free covers unlimited manual logging, plus up to 30 trips where you describe the drive and FuelMath fills in the card for you. You get a live running deduction total, and no credit card to start.
Pro is $7.99 per month, or $69 per year, which works out to about $5.75 a month. It unlocks unlimited AI trip parsing, hands-free voice logging, full expense tracking, and PDF, CSV, and email export. Google Calendar integration is coming soon.
For the wider picture, see mileage and taxes for the self-employed.