General recordkeeping education, not tax advice. Publication 463 and the substantiation rules under IRC 274(d) want a mileage record made at or near the time of the trip. A same-day note is stronger evidence than an April reconstruction. Neither record promises a deduction, a refund, or any audit outcome. Confirm the current IRS forms for the year you file.
The relief you want in April is not a clever spreadsheet. It is opening a log that already explains each work drive: when it happened, how far, and why. That calm is built in one-line notes written the day you parked — not in a weekend spent reconstructing a year you no longer remember.
GPS can stamp the date and the miles. It cannot name the stop. The purpose sentence is the part that goes missing first, and it is the part a reconstructed April file cannot honestly invent. Write it while the customer, the restaurant, or the supply run is still in your head.
The short version: a contemporaneous mileage note is a dated row written at or near the drive. Same day is the easy version. Next morning still counts as near. April does not. If a trip is already missing tonight, salvage it from proof that already exists and label the row. Then go back to writing the note as you go.
Why April you cannot do this job
A Tuesday in June is obvious while you are in it: a grocery batch, a pharmacy stop, then the app again. In April those three legs collapse into “I worked that day.” You cannot reliably split business, commuting, and personal from a calendar color nine months later. Dual-purpose drives — work plus an errand on the same road — are where memory is least trustworthy.
2026 makes the date itself load-bearing. Business miles driven January 1 through June 30 use 72.5¢ per mile; miles driven July 1 through December 31 use 76¢ (Notice 2026-10 / Announcement 2026-11). Those cents attach to the road date. A reconstructed year total times one rate is the same error as never logging. The split is walked through in the mid-year rate increase guide.
If a season is already missing, how to reconstruct a mileage log after the fact is the salvage page. This page is the habit that makes that salvage unnecessary.
What to write in a same-day mileage note
You are not writing a diary. You are leaving a sentence your future self — or a preparer — can still understand. A useful row usually has:
- Date (already there if the phone stamped the trip).
- Miles or distance for that drive or that continuous work block.
- Purpose in a short phrase that names the work.
- Destination or route when you have it — the field that makes the purpose believable.
The formal five-field list, and how long to keep the file, is in IRS mileage log requirements. The weekly loop that keeps those fields current is how to keep an IRS-ready mileage log.
Purpose examples that hold up
| Thin (avoid) | Usable same-day note |
|---|---|
| Work | DoorDash, restaurant to customer |
| Job | Uber, airport pickup — IAH |
| Business | Empty hop, downtown cell to next offer |
| Client | Showing — 412 Oak, buyer walkthrough |
| Errand | Parts run for the work van, AutoZone on 3rd |
| Home health | Visit, zip 77008 — no patient name |
“Work” is not a purpose. It does not tell anyone which miles were the paid trip, which were the unpaid hop, and which were the grocery stop with the app still open. How to sort those legs while they are still fresh is in what counts as a business mile.
If you care for patients, do not put a name in the note. A visit type and a zip code, neighborhood, or agency visit code is enough context without creating a second copy of protected health information. That industry split is in the home-health mileage guide.
When “near the time” still counts
Contemporaneous means at or near the trip, not “before you file.”
- When you park after the last drop is the easiest version. The stop is still on the screen in your head.
- The next morning, before the next shift overwrites the last one, is still near. Write the purpose on yesterday’s unclassified trips, then start today clean.
- A Friday review of that week can still sit near the drives. Fill blank purpose fields. Drop uncertain trips. Do not upgrade a personal stop because the app was open. The 15-minute version is the weekly mileage log review.
- April is not near. A spreadsheet filled the week you file does not become contemporaneous because you dated the rows carefully.
Digital timestamps help show the habit. A notebook dated as you go does too. What neither replaces is inventing a summer in September.
If you forgot to start the tracker today
Same-day salvage is still salvage. It is much closer to a live note than a March reconstruction, and it is still weaker than a trip the phone actually captured. Use records that already exist:
- a rideshare or delivery platform trip history;
- a calendar appointment, dispatch message, or work order;
- a dated receipt, parking record, or toll record;
- an odometer reading you can photograph tonight; and
- a map route used only to estimate distance after the date and purpose are established.
Write what you know. If the evidence supports the date and purpose but not an exact route, use a conservative estimate and keep the supporting note. If you cannot support the trip at all, leave it out. Do not invent a tidy mile count. Label the row if you built the distance after the drive. A transparent, limited record is more useful than a confident-looking number with no basis.
Write it while parked. Do not edit a log or handle a phone while driving. The note is paperwork for after the wheels stop, not a dashboard task.
Capture is not the same job as the note
People collapse two jobs into one swipe and then wonder why April still hurts.
- Capture: record that the car moved — date, route, distance, which vehicle.
- Note: decide what the trip was for, in a phrase you would still recognize in January.
Automatic tracking does the first job. You still do the second. A pile of unclassified drives in December is how people either miss miles or guess purpose. If you run more than one delivery or rideshare app, the same physical road belongs in the log once; platform histories confirm work, they do not add the same stretch twice. That trap is tracking mileage across apps without double-counting.
Features as proof, after the habit
The outcome is a year that does not have to be rebuilt. The product is only useful if it makes the same-day note cheap to write.
TaxMiles: Mileage Tracker (App Store id 6758579463) auto-detects drives on iPhone so the date and miles are already on the row. You swipe business, commuting, or personal when you are parked, and you can attach a short purpose — typed, or a voice note with on-device transcription on Pro. The app applies 72.5¢ or 76¢ by trip date. It does not rewind a summer you already drove, prepare a return, or promise any tax result.
Free is auto-detect and swipe classification for 40 automatic trips a month, no credit card. A full-time multi-app week will blow past 40; that is a volume gate. Pro is $5.99/month, $39.99/year, or $79.99 lifetime, with a 7-day trial on the subscriptions — unlimited trips, voice notes, CPA PDF/CSV export. Buy it because you will actually write the note, not because a blog post told you to.
Write the note tonight. Skip the April rebuild.
TaxMiles captures the route so you can add a one-line purpose the same day. Recordkeeping tool, not tax advice. Free plan is 40 trips a month.
Get TaxMiles on the App StoreFrequently Asked Questions
What is a contemporaneous mileage note?
A short written record made at or near the time of the drive: the date, the distance, and a business purpose you would still recognize months later. Publication 463 describes notes made then, not a spreadsheet assembled the week you file.
Is a note written the next morning still contemporaneous?
A next-morning note, written while you still remember the stop, is much closer to “at or near the time” than a reconstruction in April. A Friday review of that week can still sit near the drives. A year-end guess does not become contemporaneous because you dated the rows carefully.
What should I write in the purpose field of a mileage log?
Name the work, not the word “work.” “DoorDash, restaurant to customer,” “Uber, airport pickup,” “parts run for the work van,” or “showing — 412 Oak” are usable. Destination or route makes the purpose believable.
What if I forgot to start the mileage tracker today?
Salvage the same evening from records that already exist: platform history, calendar, a mapped route you can still describe, a receipt, or an odometer reading. Write a dated row and label it reconstructed if you built the distance after the drive. Do not invent an exact mile count you cannot support.
Is a reconstructed April log as good as same-day notes?
No. A rebuild from independent proof can be better than a blank year. It is weaker evidence than notes made at or near each trip. Do not relabel a reconstruction as a live log. Nothing about either record promises a deduction or any audit outcome.
Related reading
How to reconstruct a mileage log after you stopped tracking is the salvage guide if a gap already exists. Weekly mileage log review is the Friday pass that keeps blank purpose fields from stacking. How to export a mileage log for your CPA is what you hand over when the year is already dated. IRS mileage log requirements lists the fields themselves.
This article is general recordkeeping education for U.S. federal filers, not legal, tax, or accounting advice and not a guarantee of any deduction. Publication 463, Treas. Reg. 1.274-5T, IRC 274(d), and IRS mileage rates can change; read the current IRS forms or work with a licensed professional. TaxMiles: Mileage Tracker (App Store id 6758579463) is a recordkeeping tool, not affiliated with the IRS, and is not MileIQ, Everlance, or Mileage Tracker for Taxes (id 6758426140).