How much to charge for a service call

What the fee actually covers

A service call fee is often described as a diagnostic charge, but that undersells it. It pays for the drive, the fuel, the van and its stock, your insurance, and the expertise that lets you identify in twenty minutes what would take an amateur a weekend.

Framing it that way matters, because customers who think they are paying for twenty minutes feel overcharged, while customers who understand they are paying for a professional to show up prepared usually do not.

Working out your number

Start from what the visit costs you rather than from what competitors advertise. Add up your round-trip travel time, vehicle running costs, and the share of your overhead that each job has to carry, then add the margin you need.

Check the result against local rates afterwards, not before. If you land well above the market, the question is whether your overhead is heavier than it needs to be, not whether to undercharge. If you land well below, you have found money you were leaving on the table.

• Round-trip travel time at your hourly rate
• Vehicle cost per mile, including maintenance and depreciation
• A share of insurance, licensing and tool replacement
• The diagnostic time itself
• Your margin

Should you credit it toward the repair?

Crediting the fee when the customer approves the work the same day is common, and it converts well — it removes the feeling of paying twice.

If you do it, show it. Put the fee on one line and the credit on the next, so the customer sees a concession worth something rather than an invisible discount they never register. An invoice where the fee simply never appears teaches them it was never real.

The alternative — never crediting, and pricing the fee low enough that nobody minds — is also defensible, and simpler to administer. What does not work is deciding case by case, because word gets around and every customer starts negotiating.

After-hours and emergency rates

Charge a premium for evenings, weekends and holidays, and say so before you get in the van. Customers facing a burst pipe at 9pm accept an after-hours rate without complaint; the same customer feels ambushed if the first mention of it is on the bill.

Put the premium on its own line too. A visible after-hours charge reads as fair. An hourly rate that silently doubled reads as opportunism, even when the total is identical.