How to Price Diagnostics vs Repairs Fairly
Charge fairly for diagnostic time and repairs without losing trust. Transparent pricing that works for you and the customer.
Customers often expect "free diagnostics" or don’t understand why finding the fault costs money. At the same time, diagnostic work is skilled, time-consuming, and uses expensive equipment. This guide covers how to price and explain diagnostics and repairs so customers feel fairly treated and you get paid for the work you do.
Be clear up front
1. Charge for diagnostic time—and say so
Diagnostic work is real work: plug-in tools, road tests, strip-downs, and experience. Charge for it. Options: a fixed diagnostic fee (e.g. £60–£120), or labour at your hourly rate with a minimum (e.g. 1 hour). Many garages offer to "put the diagnostic time towards the repair" if the customer goes ahead—that’s a fair incentive and still values your time.
If you don’t charge, customers assume it’s free and you absorb the cost. That encourages "just have a look" requests and undervalues your skills.
2. Separate "found the fault" from "doing the repair"
Once you’ve diagnosed, give a clear quote for the repair: parts, labour, and total. Don’t hide diagnostic cost inside the repair—itemise it. "Diagnostic: £X. Repair (parts £Y, labour £Z): £Total." If they proceed, you can show "diagnostic credited against repair" so the effective repair labour is lower. Transparency builds trust.
3. When the customer says no to the repair
If you’ve done the diagnostic and they choose not to repair (or go elsewhere), you still charge for the diagnostic. Make that clear before you start: "The diagnostic fee is payable whether or not you go ahead with the work." If they’ve signed or agreed to that, you’re on solid ground. If they refuse to pay, you’re in a difficult spot—hence the importance of clear wording and a written or verbal agreement upfront.
Consumer law
4. Use the same labour rate for diagnostics and repairs
Avoid different rates for "diagnostic" vs "repair" labour—it confuses customers and can look like you’re inventing categories. One labour rate, applied to all billable time, is simpler and easier to justify. If you want to encourage "repair with us," offer to credit diagnostic time against the repair—don’t discount the rate itself.