Forgot to Track Your Mileage? How to Reconstruct Missed Trips

Almost everyone who claims mileage has a gap somewhere: the month before the app was installed, the week the phone died, the stretch where tracking was switched off and never switched back on. A gap is not fatal. A fabricated fill-in is.

What is allowed

The standard asks for records made at or near the time of the trip, but it also allows other evidence to establish an expense — and in practice, examiners accept a log reconstructed from contemporaneous sources: documents created at the time for other reasons. Your calendar, invoices, delivery app history, appointment system, email confirmations and receipts were all written while the driving happened. They are evidence. Your memory of "roughly 200 miles a week" is not.

The distinction that matters: you are not inventing trips, you are recovering trips that happened and can be shown to have happened.

Where to find the evidence

• Your calendar. Appointments with addresses are the richest source: date, destination and purpose in one place. Recurring entries recover recurring drives.
• Client invoices and job records. Every on-site job implies a round trip with a known address.
• Platform history. Delivery and rideshare apps keep per-trip history well beyond the annual summary. Export it.
• Card statements and receipts. A fuel stop, a toll, a parking garage or a lunch on a job day places you somewhere on a date.
• Phone location history. If you have it switched on, Google Maps Timeline or the iPhone's significant-locations data can confirm where the car actually went.
• Service records. Oil-change invoices record the odometer, which brackets your total mileage between two known dates.

Turning evidence into entries

1. Rebuild the date list first. Work through the calendar and job records and write down which days had business driving and where you went.
2. Get the distance from a map, not from memory. Look up the actual route for each trip and record the real figure — 17.2 miles, not "about 20".
3. Write the purpose per trip, taken from the source document.
4. Sanity-check against the odometer. Total miles for the year should exceed your reconstructed business miles by a believable amount of personal driving. If it does not, something is wrong with the reconstruction.
5. Keep the sources. Save the calendar export, the platform history and the service invoices alongside the log. The reconstruction is only as good as the evidence behind it, and the evidence is the part someone else can check.

Adding past trips in Mile

Mile lets you add a drive manually with its own date, start and end points, distance and purpose, so a recovered trip lands in the same log as the automatic ones and is valued at the rate in force on that date — which matters in a split year like 2026. Recurring routes can be duplicated rather than retyped, and the annual export prints reconstructed and recorded drives in one dated list.

One thing worth checking before you rebuild anything by hand: drives you thought were lost may not be. If tracking was running but the app was force-quit or the phone restarted, Mile recovers the drive on the next open — it is worth opening the app and reviewing the period before assuming the record is gone.

Then close the gap for good

Reconstruction is slow, imperfect and usually undercounts, because the evidence only covers the trips that left a paper trail. The fix is not a better spreadsheet habit — it is removing the habit from the equation. Turn on automatic capture, set a work-hours rule, and next April the log will already exist.