What Is a Job Sheet? And What Belongs on One
A job sheet is the record of what actually happened on a job — hours, materials, variations and sign-off. It's also the difference between an invoice you can defend and one you can only hope about.
The quote says what you're going to do. The invoice says what to pay. The job sheet is the bit in the middle that records what actually happened — and it's the one most tradies do in their head. That works right up until a client queries an invoice, a crew member's hours don't add up, or you try to work out why a job made half what you expected. This guide covers what a job sheet is, what belongs on one, and why the paper version keeps failing.
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What a job sheet is for
A job sheet travels with the job. It tells whoever's on site what they're doing, and it comes back carrying what they did — the hours worked, the materials used, anything that changed, and the client's acknowledgement that it happened.
It does four jobs at once:
- Instruction — the crew knows the address, the access, the scope and what to bring.
- Record — what was done, by whom, for how long, using what.
- Evidence — signed acknowledgement and photos, for when someone remembers it differently.
- Invoice source — everything the invoice needs, captured while it was happening.
The last one is the point. An invoice built from a job sheet is an invoice you can stand behind line by line. An invoice built from memory a fortnight later is a guess — and it's almost always a guess in the client's favour, because the things you forget are the things you did for them.
What belongs on one
| Section | What goes in it |
|---|---|
| Job details | Job number, date, client name, site address, contact on site |
| Access | Gate codes, parking, who has the key, dog on site, best arrival time |
| Scope | What was quoted, in the same wording the client accepted |
| Who attended | Names, start and finish times, breaks |
| Materials used | Quantities and items actually consumed, including from van stock |
| Variations | Extra work, why it was needed, who approved it and when |
| Photos | Before, during (especially anything about to be covered), after |
| Compliance | Certificates, test results, permits — attached, not filed elsewhere |
| Sign-off | Client acknowledgement that the work is complete |
The two most valuable and most commonly missing sections are variations and photos. Between them they resolve almost every invoice dispute a trade business will have.
Why the paper version keeps failing
Nearly every tradie has tried a paper job sheet or a carbon docket book. They fail in the same predictable ways:
- It doesn't come back. The sheet stays in the ute, goes through the wash, or arrives on Friday for a job invoiced on Tuesday.
- It gets filled in at the end. Reconstructed hours and materials from memory at 5pm, which is where variations quietly disappear.
- Photos live somewhere else. Site photos end up in a camera roll with no link to the job, so nobody can find the right one months later.
- Only one person can see it. You can't answer a client's question about a job whose sheet is in someone else's van.
- It gets typed up twice. Once on paper, once into the invoice — with a transcription error somewhere in between.
What a digital job sheet changes
The shift isn't really about paper versus screen. It's about capture happening at the moment the thing happens, rather than being reconstructed later.
- Hours logged as they're worked, not remembered at the end of the week.
- Photos attached to the job automatically, so they're findable a year later.
- Variations recorded when agreed, with a timestamp — which is what makes them billable without an argument.
- Visible to the office in real time, so someone can answer the client's call.
- Flows into the invoice without being retyped.
ServiceYak keeps the job sheet as the job record itself — scope from the accepted quote, hours, materials, photos and variations all on one job that turns into the invoice when the work's done.
Frequently asked questions
What's the difference between a job sheet and a work order?
A work order authorises the job — it's the instruction to go and do it. A job sheet records what happened when you did. In practice many trade businesses run one document that does both, which is fine as long as it captures the outcome as well as the instruction.
Does the client need to sign the job sheet?
It's not required, but a sign-off is worth having on anything larger than a quick call-out. An acknowledgement that the work was completed, taken on site while the client is standing there, resolves most disputes before they start.
What's the most important thing on a job sheet?
Variations. Extra work agreed on site and never written down is the biggest single source of lost revenue in trade businesses. If your job sheet captures nothing else reliably, make it that — with what was agreed, by whom, and when.