Every phone repair shop eventually hits the same wall: the bench fills up with dead iPhones, water-damaged Samsungs and laptops that "just stopped working", the tech spends half the day pulling boards apart, and a third of those customers never come back once they hear the quote. Whether to charge a diagnostic fee is one of the few pricing decisions where the answer isn't obvious, because charging one can genuinely scare off walk-ins — and not charging one can quietly cost you thousands a year in unpaid bench time. This article gives you the arithmetic to settle it for your shop, a decision rule for which jobs the fee applies to, and the exact wording to use at the counter.
What a free diagnostic actually costs you
The mistake most owners make is thinking of diagnostics as free because no parts are consumed. Parts aren't the cost. Time is. A proper diagnostic on a no-power device — visual inspection, test charge, known-good battery swap, maybe pulling the board to check for liquid indicators — is rarely under 20 minutes, and once you add writing up the findings and calling the customer, 30 to 40 minutes is realistic.
Put deliberately round, hypothetical numbers on it. Say your technician costs you $45 an hour once you load in super, leave and downtime. A 35-minute diagnostic is roughly $26 of bench cost. Say you take in 15 of these jobs a week and 6 convert to paid repairs. The other 9 are pure cost: 9 × $26 = $234 a week, call it $12,000 a year of technician time spent producing quotes that get declined. That's before you count the opportunity cost — every free diagnostic is 35 minutes your tech wasn't doing a $110 screen job.
Note what that arithmetic is really saying: the cost of free diagnostics is driven by your decline rate, not your intake volume. A shop where 90% of diagnostics convert to repairs can afford to eat the cost. A shop taking in lots of water-damaged and no-power devices, where half the quotes get knocked back, cannot. So before you decide anything, work out your own numbers — if you're logging every job properly in ticket management, pulling your quote-declined rate for diagnostic jobs takes five minutes.
Setting your diagnostic fee: the arithmetic and the rule
Here's the position: most shops that are on the fence should charge a diagnostic fee on genuine fault-finding jobs, credit it in full against the repair, and keep quick visual quotes free. That structure means the customer who goes ahead pays nothing extra, and the customer who declines has still covered your bench time. The fee isn't a profit line. It's a filter and a cost recovery.
Step 1: Calculate the floor
Your fee should at minimum cover the bench time. Loaded hourly cost × average diagnostic time, rounded up to a friendly number. Using the hypothetical figures above: $45/hr × 0.6 hours = $27, so anything from $30 up covers you. Many owners land on a number like $39 or $49 because it credits cleanly against a repair invoice — pick whatever suits your price points, but don't go below your floor or you've just converted a free diagnostic into a discounted one.
Step 2: Decide which jobs it applies to
Charging a fee to quote a visibly cracked screen is madness — you can price that from the counter in 30 seconds using your device database and the fee would only cost you the job. The fee belongs on jobs where real fault-finding is required. A workable rule:
- Free, quoted on the spot: visible damage with a known fix — cracked screens, smashed back glass, worn batteries with obvious symptoms, charge port cleaning.
- Diagnostic fee applies: no power, no display with no visible damage, liquid damage, intermittent faults, boot loops, "it just died", anything needing board-level inspection.
- Fee always credited in full against the repair if the customer proceeds. Say it in the same breath as the fee, every time.
Step 3: Decide what happens when you can't fix it
Take a position on this before the first awkward conversation, not during it. The defensible line: the fee pays for the diagnosis, not the outcome. If your tech spent 40 minutes establishing that a liquid-damaged board is beyond economic repair, that diagnosis has value — it stops the customer wasting money elsewhere and tells them to move to data recovery or replacement. Keep the fee. What you should refund is the situation where you couldn't actually diagnose the fault at all. "We found the problem but can't fix it" earns the fee; "we have no idea" doesn't.
How to say it at the counter without losing the job
The fee itself rarely loses jobs. Fumbling the explanation does. The customer needs to hear three things in one sentence: there's a fee, it becomes free if they go ahead, and it buys them something concrete. Something like:
"For a fault like this we do a full diagnostic — it's $40, and if you go ahead with the repair that $40 comes straight off the price. Either way you'll get a written quote and know exactly what's wrong with it."
A few counter rules that make this land properly:
- Quote the fee before you take the device, and record the customer's agreement on the ticket. Under the Australian Consumer Law you must not mislead customers about pricing, and springing a fee on someone at collection is exactly the kind of conduct that generates complaints. Get it agreed up front, in writing, on the intake ticket.
- Take payment at drop-off, not pick-up. This is the single biggest operational win: it kills the abandoned-device problem almost entirely, because the customer has skin in the game. Run it through your point of sale as a deposit or diagnostic line item so the paper trail is clean.
- Credit it visibly on the final invoice. A line reading "Diagnostic fee — credited: −$40" on the invoice does more for goodwill than the discount itself. The customer sees you kept your word.
- Never advertise "free diagnostics" and then charge one. If your window sticker or Google listing says free, charging anything is a misleading-conduct problem, not just a customer-service one. Update the signage before you update the policy.
One hedge worth stating plainly: pricing disclosure and refund obligations sit under the Australian Consumer Law, and the details matter. This is general guidance — check your policy wording with your own lawyer or the ACCC's small business guidance before you print it on tickets.
GST, record-keeping and reviewing the number
If you're registered for GST, the diagnostic fee is a taxable supply like any other service you sell — the $40 you quote should be GST-inclusive, and it needs to appear as its own line item so the credit against the eventual repair reconciles cleanly. Don't bury it in a lump-sum deposit. Your accountant will thank you at BAS time, and so will you when a customer disputes a charge six months later. As always, confirm your own treatment with your accountant.
Then treat the fee as a number under review, not a commandment. Every quarter, pull three figures from your reporting: how many diagnostic-fee jobs you took in, what percentage converted to paid repairs, and what percentage of quoted customers walked at the mention of the fee. If conversion on diagnostic jobs went up after introducing the fee — which is the usual pattern, because the fee filters out people who were never going to pay for a repair — the policy is working. If intake collapsed and conversion didn't move, your fee is too high for your area or your counter script needs work. Adjust one variable at a time.
The decision in one paragraph
If your quote-declined rate on fault-finding jobs is above roughly one in four, charge a diagnostic fee: set it at your loaded bench cost rounded up to a clean number, apply it only to genuine fault-finding (never to visual quotes), collect it at drop-off, credit it in full against the repair, keep it when you diagnose an unrepairable fault, and refund it when you can't diagnose at all. Put the fee on the intake ticket, keep your advertising honest, and review the conversion numbers quarterly. That's the whole method — and it's one your counter staff can run without you standing behind them.