Disputes over hours on the invoice happen when the customer cannot check the hours they are billed for. You prevent them by recording hours during the job with start and end times, separating work and travel time, adding photos and having the customer sign off digitally on site before the invoice is sent.
"Your engineer was here an hour at most, not three." Every installation, building or service business knows the call that follows the invoice. You have no proof apart from a timesheet filled in from memory on Friday, so you give a discount to end it. That costs margin, time and sometimes a customer.
This article covers why disputes over hours happen, what a work order needs to prevent them and how digital sign-off settles the discussion before it starts.
Why do disputes over hours happen?
Customers rarely dispute hours they watched being recorded. Disputes arise when the invoice is the first time the customer sees the hours. Four causes keep coming back:
- Hours are filled in afterwards: the timesheet is written on Friday from memory, without start and end times.
- Work and travel time are mixed: the customer sees "3 hours" and does not know an hour of that was driving.
- The description is too vague: "fault fixed" does not explain why it took three hours.
- The customer signed nothing: there was never a moment where they agreed.
What should be on the work order?
- Date and technician name.
- Start and end time for each work period, not just a total.
- Work and travel time separately.
- A specific description: what was the problem, what was done, what is still needed.
- Materials used, with quantities.
- Photos before and after.
- The customer's signature, with their name.
How a digital work order makes hours verifiable
Timestamped hours instead of memory
On the OutSmart digital work order, the technician starts a timer, chooses work or travel time and stops at the end. Start, end and duration are stored. If something needs correcting, the technician adjusts it before saving, not a week later. Hours can then be reviewed in Timesheets.
Photos and materials on the same work order
Photos show why a job took longer than expected: a corroded pipe section, an inaccessible unit, a second fault. Materials go straight onto the work order, so they end up on the invoice too.
Sign-off on site
Once the job is done, the customer signs on the technician's phone or tablet. With sign and send the technician chooses the recipients and the work order goes to the customer, with the PDF attached if you set it up that way. In the PDF layout you decide whether work periods are shown and which columns the customer sees.
Mandatory fields
Make a signature and photos mandatory before a work order can be sent. Then no work order comes back without the customer's approval.
Worked example: Two disputed invoices a month of £1,300 each, settled with a 10% discount, cost £260 a month in pure margin. Add the phone calls, the digging around and sometimes a free return visit. Over a year that is easily more than £3,000.
Billing hours without vs. with OutSmart
The same job, two very different conversations afterwards.
| Process step | Timesheet or Excel | With OutSmart |
|---|---|---|
| Recording hours | Afterwards, rounded, no start or end time | Timer on the work order with start, end and work or travel time |
| Evidence | "Fault fixed" | Description, materials and photos on the work order |
| Customer approval | None, the customer first sees the hours on the invoice | Digital signature on site, work order emailed to the customer |
| In a dispute | Your word against theirs, often ends in a discount | Signed work order with work periods and photos as the answer |
End disputes over hours in 3 steps
Step 1: Agree a fixed work order standard. Decide what must be on every work order: work periods, work and travel time, description, materials, photos and signature. Make the key fields mandatory.
Step 2: Have the customer sign on site. Train technicians to go through the work order with the customer before they sign. Two minutes at the kitchen table saves a phone call after the invoice.
Step 3: Invoice from the signed work order. Let the invoice come from the same data the customer signed. Then the invoice always matches what the customer has already seen.
Also read which record-keeping rules apply to hours and materials.
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