Machine Service History Records for Workshops

A machine service history is the running record of everything done to one piece of equipment over its life: dates, work carried out, parts fitted, hours or mileage at the time, and who did it. For a workshop, the record is built for someone else's machine — the customer's tractor, telehandler, compressor, or press — which makes it both an operational tool and something the customer genuinely values.

Most workshops already produce the raw material for this on every job card. Far fewer assemble it into a per-machine history, and that gap is where the value sits.

Why the Per-Machine View Matters

A job card answers "what did we do on this visit?" A service history answers "what has ever been done to this machine?" — a different and more useful question.

Diagnosis gets faster. When a machine comes back with a related fault, knowing what was replaced eight months ago and at what hour reading changes where you start looking. Reactive workshops see a lot of returning equipment, so this compounds.

Quotes get grounded. Pricing a rebuild is guesswork unless you can see what the last three cost in parts and hours.

Warranty questions get settled. If a part fails, the record shows when it went on and which one it was. Without that, the conversation is two people trying to remember.

The customer values it. Documented service history is widely understood to support resale value on expensive equipment, and owners of expensive machines know it. A workshop that hands over a clean history is doing something most don't.

Recurring work gets predictable. Once you can see intervals across a customer's fleet, you can tell them what's coming rather than waiting for it to break.

The Columns Worth Having

This is the structure to aim for. It works as a spreadsheet, a printed log kept with the machine, or a view inside a job system.

Column	What goes in it	Why it earns its place
Date	Date work completed	The spine of the record
Job reference	Your job card number	Links back to the full detail
Hours / mileage	Reading at time of work	Turns dates into intervals — the single most useful column after date
Work carried out	Short plain description	What a future reader actually scans
Parts fitted	Description and part number where known	Warranty, recurrence, and identifying what's already been replaced
Technician	Who did the work	Follow-up questions have somewhere to go
Labour hours	Hours on the job	Grounds future quoting
Faults found not actioned	Anything noted but deferred	Where the next job usually comes from
Next due	Interval or date, if applicable	Turns the log into something forward-looking

Two of these get left out most often and are worth defending.

Hours or mileage at time of work is what converts a list of dates into service intervals. Without it you know a filter was changed in March; with it you know it was changed at 4,180 hours, which is what tells you whether the next one is due.

Faults found but not actioned is the commercially valuable one. A technician notices a weeping seal while doing something else, mentions it, and it's forgotten. Recorded against the machine, it's a conversation next time it's in — and it's the kind of thing customers are glad you flagged.

Building the Record Without Extra Work

The point is not to maintain a second document. Everything above is already captured on a well-structured job card — the history is a different arrangement of the same data.

If you're on paper, the practical approach is a single sheet per machine kept in the customer's file, with one line added when a job closes. It's a minute per job. The weakness is that it only works if someone does it every time, and it can't be searched.

If you're on a spreadsheet, one row per job with a machine identifier column gets you most of the way — filter by machine and you have the history. Our job tracking spreadsheet guide covers the wider structure this fits into.

If you're on a job system, the history should assemble itself, provided every job is tagged to a machine identity rather than just a customer. That tagging step is the one to get right, and it's where systems designed around road vehicles cause trouble.

Identifying the Machine

This is the part that quietly decides whether the history is usable in five years.

Registration numbers only exist for road vehicles. For everything else you need the serial number from the plate, and plates get painted over, corroded, or removed. Practical approach:

• Record the serial number whenever it's legible, and photograph the plate the first time you see it — a photo attached to the record settles later arguments about which machine was which.
• Add make, model and a distinguishing feature as a fallback ("JD 6155R, green cab roof, customer calls it the yard tractor"). Not elegant, and it's what actually lets someone match a phone call to a record.
• Keep the customer's own name for it. Owners refer to machines by nickname or fleet number, not serial. If your record only holds the serial, the phone conversation stalls.
• Never key the history to the customer alone. Machines change hands, and a history that follows the owner rather than the machine loses most of its value.

What This Is Not

A workshop service history is a commercial and operational record. It is not, on its own, a statutory inspection record.

Certain equipment carries separate legal inspection regimes with their own documentation requirements. Under the Lifting Operations and Lifting Equipment Regulations 1998, regulation 9, every employer must ensure that lifting equipment exposed to conditions causing deterioration which is liable to result in dangerous situations is thoroughly examined. Regulation 3 is what sets out who that requirement lands on: an employer, in respect of lifting equipment "provided for use or used by an employee of his at work", and — "to the extent of his control" — a person who has control of the equipment, or of how it is used, in connection with a trade or business. So it can be a hirer, or the workshop itself if it uses its own lifting gear (a vehicle lift or engine hoist) at work. It is not automatically the equipment's owner: regulation 3(5) expressly disapplies the requirements to a person in respect of equipment "supplied by him by way of sale, agreement for sale or hire-purchase agreement". These Regulations apply in Great Britain (regulation 3(1)); Northern Ireland has its own equivalent regulations. And it is not automatically someone else's obligation just because the workshop is doing the repair. If you carry out that kind of inspection as a service, that certification is a distinct document with its own rules — keep it separate from the general service log rather than assuming one covers the other.

For your own business records, HMRC's guidance on business records if you're self-employed sets out what you need to retain; limited companies should check the company and accounting records guidance, which differs.

Frequently Asked Questions

What should a maintenance log include? At minimum: date, work carried out, parts fitted, and hours or mileage at the time. Adding technician, labour hours, and deferred faults turns it from a record into something you can plan and quote from.

How is a service record different from a job card? A job card covers one visit in full detail. A service record is the per-machine summary across every visit. The job card is the source; the service record is the view.

Should the customer get a copy? Yes, and it's worth making a point of it. Documented history is widely understood to support resale value on expensive equipment, and it's a straightforward way to be more useful than the workshop down the road.

The Short Version

• The per-machine view answers a different question from the job card, and a more valuable one.
• Hours or mileage at time of work is the column that turns dates into intervals.
• Record faults found but not actioned — that's where the next job comes from.
• Key the history to the machine, not the customer. Machines change hands.
• Photograph the serial plate the first time you see it.
• A service history is a commercial record, not a statutory inspection certificate. Keep those separate.

If you're setting up the underlying job card first, our free workshop job card template generates a complete structure as a PDF, and the job card format guide explains what each section is for. Because the history is also what grounds a quote, our guide to job costing software for workshops covers turning that record into per-job margin figures.

Sources

• Business records if you're self-employed — GOV.UK
• Running a limited company: company and accounting records — GOV.UK
• Lifting Operations and Lifting Equipment Regulations 1998, regulation 3 (application — who the requirements fall on) — legislation.gov.uk
• Lifting Operations and Lifting Equipment Regulations 1998, regulation 9 (thorough examination) — legislation.gov.uk

This post covers service history as a commercial record-keeping practice for UK workshops. It is not guidance on statutory equipment inspection regimes — those carry their own documentation requirements, and the duty holder depends on who employs the people using the equipment or has control of it (which can include the workshop itself), so check with the relevant regulator or a qualified inspector where they apply.

We're building JobCardApp so machine history assembles itself — every job tagged to a machine by serial number, searchable across years, with photos and parts attached to the record. Join the waitlist for early access.