Tesla Mileage Log: What the IRS Asks You to Record (2026)
General information, not tax or legal advice. Talk to your tax preparer about your situation.
A mileage log for business driving should record each trip's date, destination, business purpose and miles. IRS Publication 463 also shows start and end odometer readings and annual totals. It has to be kept at or near the time of the trip; a weekly log counts. A Tesla's own trip and odometer data can supply most of those fields.
If you drive a Tesla for work as a sole proprietor, 1099 contractor, rideshare or delivery driver, the mileage log is the record your deduction rests on. This guide walks through what IRS Publication 463 asks a log to show, why logs tend to fall apart, the ways Tesla drivers keep them today, and what a single log line should contain.
What the IRS asks a mileage log to show
The four elements: date, destination, purpose, miles
Chapter 5 of IRS Publication 463 (Recordkeeping) describes what "adequate records" for business use of a car look like. For each business trip, the record should show:
- Date of the trip.
- Destination: where you went (a client's address, a job site, a city).
- Business purpose: why you went, in a few words ("site visit, Smith remodel", "showing at 14 Oak St").
- Miles driven for that trip.
Publication 463 does not require a particular format. A paper diary, a spreadsheet, or an app can work, as long as these elements are recorded.
Odometer readings and yearly totals
The sample daily log in Publication 463 (Table 5-2) includes columns for the odometer reading at the start and end of each trip. Odometer readings tie each trip's miles to the car rather than to an estimate.
Totals matter too. Form 4562, Part V asks for total miles driven during the year, business miles, commuting miles and other personal miles. If your log has an odometer reading at the start and end of the year, those totals can be checked against the car. Commuting between home and a regular workplace is generally personal, not business, so a log should separate the two (Pub 463).
"Timely kept": at or near the time of the trip
Publication 463 says a record made at or near the time of the expense carries more weight than one rebuilt later. It also treats a log kept weekly as timely kept, for example, filling in the week's business trips each Friday from your calendar and the car's trip history. You don't have to write a line from the driver's seat after every stop, but you shouldn't wait until spring either.
Why logs fall apart: reconstruction in March
The most common problem isn't a wrong format. It's a log that didn't exist until tax season. Rebuilding twelve months of trips from memory, bank statements and a rough "about 40 miles a day" average produces round numbers with no odometer readings and vague purposes.
What the Tax Court has said about logs built from averages
The National Taxpayer Advocate's annual reports to Congress summarize many Tax Court cases on vehicle expenses. A pattern across them is that reconstructed logs built from estimates or averages, with no records made at the time, are often given little weight, and the deduction is reduced or disallowed. Each case turns on its own facts, so treat this as a reason to keep records as you go, not as a prediction of any outcome.
How Tesla drivers keep logs today
Trip counter and notebook
The car's trip meter tells you distance. Paired with a notebook in the door pocket, it can work. The weak spot is discipline: the meter doesn't record destination or purpose, and a missed reset mixes trips together.
Phone GPS apps
General mileage apps use your phone's location to detect drives. They're easy to start with, but miles come from GPS traces rather than the car's odometer, and trips can be missed when the phone is off, in a bag, or riding in a different car.
Car-data loggers and CSV exports
Many owners on forums describe using car-data loggers such as TeslaFi, Tessie or the self-hosted TeslaMate to record drives through their Tesla account. These keep a detailed driving history. What you usually get at tax time is a CSV of drives. You still have to add a business purpose to each trip, separate commuting, and total the year yourself.
Building the log from the car's own odometer
CyberDeduct takes the car-data approach and finishes the job: it turns the car's record into a mileage log, built around IRS Pub 463, for your tax preparer.
Trips from the car, with start and end odometer
You connect your Tesla account once through Tesla's standard account sign-in (OAuth); CyberDeduct never sees or stores your password, and you can disconnect at any time. Trips assemble from the car's telemetry with date, places, and start and end odometer readings taken from the car, not estimated. There's no tracker to start or stop, and the app can stay closed.
You confirm the purpose; home and work rules handle the rest
Each trip gets a label: Business, Commute or Personal. Your home and work addresses and route templates label most trips automatically, and you confirm the business purpose. The dashboard shows business-use percentage by month and year to date, and a reminder on the 28th tells you if you're under 50%.
Export: a log and a Form 4562 Part V worksheet
At tax time you export the mileage log as PDF or CSV, plus a Form 4562 Part V worksheet for your preparer. The worksheet is a summary for your preparer, not an e-filed form. See how the log is built, or see plans and the free trial.
Checklist: what a complete log line looks like
Here's a sample row with every element Publication 463 describes. It's illustrative, with no deduction figures.
| Date | Start odometer | End odometer | Miles | Destination | Business purpose | Type |
|---|---|---|---|---|---|---|
| 2026-10-14 | 18,402 | 18,437 | 35 | Client office, 200 Main St | Quarterly review meeting | Business |
- Date, destination, purpose and miles on every business trip.
- Start and end odometer readings, plus readings at the start and end of the year.
- Commuting and personal trips marked separately from business.
- Entries made at or near the time, weekly at the latest.
- Year totals that match Form 4562, Part V.
A note on rates
If you use the standard mileage rate, the IRS rate for 2026 is 72.5¢ per mile for January 1 to June 30 (IR-2025-128 / Notice 2026-10) and 76¢ per mile for July 1 to December 31 (IR-2026-29 / Announcement 2026-11), per the IRS standard mileage rates page. Rules for using the rate are in Pub 463.
Example: 1,000 hypothetical business miles driven in August 2026 × 76¢ = $760 of mileage at the standard rate. Estimates, not tax advice.
Frequently asked questions
Does the IRS require a specific mileage log format?
No specific format is required. A log, diary, spreadsheet or app works if it records the required elements: date, destination, business purpose and miles (IRS Pub 463).
Do I need to write my log every day?
No. IRS Pub 463 treats a log kept weekly as timely kept, so filling it in once a week from your records is acceptable.
Do I need odometer readings?
Pub 463's sample log has start and end odometer columns, and Form 4562, Part V asks for total, business and commuting miles for the year. Odometer readings are the simplest way to support those totals.
Can the Tesla app's trip counter be my log?
It gives distance but not the purpose or destination of each trip, so you still need to record those elements somewhere.
Do commuting miles count as business miles?
Generally no. Driving between your home and a regular workplace is usually commuting, which is personal (Pub 463). Talk to your tax preparer about your situation.
I didn't keep a log. What now?
Talk to your tax preparer. Reconstructed logs need supporting records and may not be accepted. Start a log made at the time going forward.
This article is general information, not tax or legal advice. Talk to your tax preparer about your situation.
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