Plumber job sheets: what they must include so you don’t lose money

The job sheet is the only document that links what you did to what you’ll get paid. When it’s filled in properly, the moment the job finishes, the bill writes itself and the customer has nothing to dispute. When it’s written up in the evening from memory — or not at all — materials go missing, hours go missing and bills stay unpaid.

In this guide we’ll look at the fields a plumber’s job sheet should have, which of them are systematically forgotten, and how the picture changes when you record everything on site, from your phone, instead of on a pad on the van’s dashboard.

What a job sheet is and how it differs from a receipt

The receipt or invoice says how much the customer owes. The job sheet says why they owe it: what problem you found, what you did, what materials went in and how long it took. It’s the technical history of the call-out, not the tax document.

This distinction matters in practice at three moments: when the customer asks “why so much?”, when the same fault comes back six months later, and when you need to prove that the part that failed wasn’t one you fitted.

The fields that should always be there

A job sheet that covers the following leaves no gaps in either billing or documentation:

• Customer and property details: name, phone, full address, floor and — in a block of flats — which flat. The address is the key you’ll use to find the installation again.
• Arrival and departure date and time: not for the sake of paperwork, but because labour is charged by time and time is the first thing forgotten.
• The fault as the customer described it: in their own words (“it’s dripping under the sink”). It shows what was originally asked for.
• Findings: what you actually found. Very often it differs from the description, and that’s where the price difference comes from.
• Work carried out: with clear verbs — replaced, repaired, cleaned, pressure-tested.
• Materials with quantities: every fitting, every metre of pipe, every washer. This is the field that costs the most when it’s left out.
• Labour: hours per tradesperson, separately if two people worked.
• Before and after photos: the strongest evidence you have, and the cheapest.
• Outstanding items and recommendations: what wasn’t done today and what the customer should keep an eye on.
• Signature or confirmation of completion: even a digital confirmation on a phone will do.

Why materials get lost more often than labour

You remember the hours because you lived through them. Small parts, not so much: three compression fittings, two elbows, half a metre of flexible hose and a bit of PTFE tape leave no trace in your memory, but they do leave one in the till. For a business doing six to eight jobs a day, ten euros of unrecorded materials per job adds up to more than a thousand euros a month.

The rule that works: a part is recorded the moment it comes out of the van, not at the end of the job. If you log it in an app with a list of the materials you use most often, it takes two taps on the screen and doesn’t interrupt the work.

When to fill it in: on site, not in the evening

A job sheet filled in down in the basement, in front of the customer, has three advantages the evening version never gets:

1. It’s accurate, because the findings and the materials are still in front of you.
2. It’s accepted, because the customer sees what you’re writing and agrees there and then — not when the bill arrives.
3. It doesn’t leave you a second job for the evening. Paperwork that’s put off is paperwork that multiplies.

If you use paper, the only way it works is a carbon-copy pad with one copy for the customer. The problem shows up three months later, when you need to find what you did at a particular address — and the pads are filed by date, not by property.

From job sheet to invoice, without typing it all again

The biggest gain from a digital job sheet isn’t the recording; it’s that nothing has to be written out again. The materials and labour you logged become billing lines, the bill becomes an invoice and the customer’s balance updates itself.

In PlumbPro, the job sheet is linked to the installation record for each property: whatever you wrote today at 84 Station Road you’ll find there in two years’ time, along with the photos and the parts you fitted.

A practical template

If you’re starting from scratch, this order of fields covers almost every call-out:

1. Job sheet number and date.
2. Customer, phone, address, floor/flat.
3. Arrival time — departure time.
4. Reported problem (in the customer’s words).
5. Findings on inspection.
6. Work carried out.
7. Materials: description, quantity, unit price.
8. Labour: tradesperson, hours, hourly rate.
9. Before / after photos.
10. Outstanding items and recommendations to the customer.
11. Total, payment method, balance.
12. Customer’s confirmation of completion.

Conclusion

The job sheet isn’t paperwork — it’s the point where the work becomes money you can collect and a documented history. Two minutes on site save an hour in the evening, a dispute a month and a good deal of unrecorded materials a year. All it takes is filling it in where the work is done, with a tool that doesn’t slow you down.