What Your Vehicle Logbook Must Record (And How to Stop Doing It by Hand)

Most business vehicle logbooks are reconstructed at the last minute from memory, fuel slips and guesswork. That is a problem, because a logbook is only worth anything if it is contemporaneous — recorded at the time, not invented afterwards. Here is what a defensible logbook actually contains, and why the manual version keeps failing.

What every trip record needs

Tax authorities differ in the detail, but the core of a business-mileage record is remarkably consistent worldwide:

• Date of the trip
• Opening and closing odometer readings
• Total distance travelled
• Purpose of the trip, and whether it was business or private
• Destination or route

Alongside the trips, you generally need the vehicle’s odometer reading at the start and end of the tax year, so total distance can be split between business and private use.

Why the paper book fails

Three predictable failures:

It is filled in later. A book completed in one sitting at year-end looks exactly like what it is. Round numbers, no odd distances, suspiciously tidy.

Odometer readings drift. Miss a few trips and the closing reading no longer reconciles with the vehicle. Once the numbers stop adding up, the whole record is questionable.

Private trips vanish. People record the business trips they want to claim and forget the school run. That inflates the business percentage — which is exactly the thing that gets queried.

What automation actually changes

An app that logs kilometres as you drive fixes the root cause rather than the symptom. The trip is captured when it happens, with the distance measured rather than estimated. You classify it as business or private afterwards, which takes seconds and — crucially — means the private trips get recorded too.

The useful extras, once trips are captured automatically:

• Fuel and running costs attached to the vehicle, so cost per kilometre is a real number
• Maintenance history in the same place as the distance that caused it
• A clean export — a PDF your accountant can actually use, rather than a photo of a notebook

Business or private: get the split right

The single biggest determinant of what you can claim is the business-versus-private ratio, and it is also where most records are weakest. Two rules keep you safe:

1. Commuting is usually private. Home to your regular place of work is typically not a business trip. Treating it as one is a common and expensive error.
2. Record everything, classify honestly. A logbook that shows only business trips is less credible than one showing a realistic mix.

Keep it, and keep it readable

Retention periods vary by country, but keeping records for five years is a reasonable default. A digital logbook has a quiet advantage here: it does not fade, get left in a traded-in vehicle, or become unreadable.

The short version

Record each trip when it happens. Capture date, odometer, distance, purpose and classification. Include the private trips. Keep the fuel and maintenance alongside it. Export something your accountant can read.

That is the job LogLane does — it logs your kilometres automatically as you drive, tracks fuel, maintenance and running costs, and exports a clean PDF logbook whenever you need one.

This article is general information about record keeping, not tax advice. Rules differ by country and circumstance — check your own position with a qualified accountant or tax practitioner.