Auto Repair Garage: What Does a No-Show Appointment Really Cost You in 2026?

A vehicle does not show up at the planned time. The mechanic is available, the lift is booked and the parts may already be waiting on the shelf. For an auto repair garage, the cost of a missed appointment is not limited to the absent revenue: you also need to measure the unused workshop time, the tied-up parts and the follow-up work.

There is no national no-show rate that the sources consulted allow us to confirm for French garages as a whole. L'Argus nevertheless reports that the phenomenon varies with the context and can reach 20% during private sales or open days. That figure is not an average for workshop appointments. The L'Argus article, published on 13 July 2026, was consulted on 26 October 2026.

The 10% and 15% scenarios used below are therefore working assumptions, not established market rates.

What a missed appointment really costs a garage

A missed slot has several consequences that need to be distinguished:

• Absent potential revenue: the planned labour and parts are not billed.
• Unused workshop time: the mechanic is still paid, even if the job cannot be carried out.
• Tied-up parts: they can be reused or returned, but their cost remains temporarily committed. If they are specific or slow-moving parts, the tie-up can last.
• Follow-up time: calls, messages and rescheduling take up staff time.

The amount of unrealised revenue is not automatically equal to the net loss. A part can be used for a later repair; a slot freed early enough can be given to another customer. You therefore need to separate the hoped-for revenue, the contribution that would have been generated and the costs actually added by the absence.

Hypothetical example: an oil change and a service planned for 1 h 30

Consider a 1 h 30 appointment for an oil change and a service. The garage blocks a slot and the mechanic is present, but the customer does not come.

All amounts below are teaching assumptions, not average prices or costs observed in a real garage. The labour rate chosen is 80 € excl. VAT per hour. Fiches-Auto indicates a generally billed hourly rate between 65 and 95 €, depending on the workshop; its page, updated on 13 October 2025 and consulted on 26 October 2026, presents these amounts as indicative. See the page on labour rates.

Planned revenue and tied-up parts

The garage does not necessarily lose the 37 € excl. VAT of parts: they can stay in stock and be used for a later job. However, the amount is tied up. If the references were ordered specifically, cannot be returned or sell slowly, the risk of loss increases.

The total planned revenue for the job would have been 174 € excl. VAT: 120 € of labour and 54 € of parts. This sum represents an unrealised sale, not an automatic net loss.

Mechanic time and follow-up cost

To calculate a hypothetical contribution, assume a loaded pay cost of 24 € per hour for the mechanic. This fictitious amount includes salary and employer charges; it therefore carries no VAT label, since wages are not subject to VAT.

• Cost of the 1.5 hours of mechanic time: 1.5 × 24 € = 36 €.
• Contribution of the planned labour: 120 € − 36 € = 84 €.
• Planned margin on parts: 54 € excl. VAT − 37 € excl. VAT = 17 € excl. VAT.
• Estimated contribution of the completed job: 84 € + 17 € excl. VAT = 101 €. In line with usual accounting practice, this contribution is expressed excl. VAT on the sales side, since the margin on parts is calculated on excl. VAT amounts.

Add a follow-up step after the absence: 5 minutes of administrative work at a hypothetical loaded pay cost of 24 € per hour. The calculation is 5 ÷ 60 × 24 €, i.e. 2 €.

In this scenario, the absence therefore represents about 101 € of potential contribution not generated, plus 2 € of extra follow-up. This estimate excludes the garage's fixed costs: rent, insurance, tools or software. Those still have to be covered, but their amount depends on each establishment.

What is the combined effect for a garage that plans 40 appointments per week?

To make the effect visible, take a garage that plans 40 appointments per week, i.e. about 173 per month on average (40 × 52 ÷ 12) and 2,080 per year. These volumes are assumptions too.

At 174 € excl. VAT of planned revenue per job in our example, that represents about:

• 10%: 208 × 174 € = 36,192 € excl. VAT of annual potential revenue not earned.
• 15%: 312 × 174 € = 54,288 € excl. VAT of annual potential revenue not earned.

These sums are not guaranteed net losses. They assume that every missed appointment would have led to the complete job, at the planned price, with the slot not replaced by another customer.

Using the hypothetical contribution of 101 € per job and the 2 € of follow-up after each absence, the unrecovered contribution would be 103 € per missed appointment. That corresponds to 21,424 € over 208 absences and 32,136 € over 312 absences.

How many completed appointments does it take to make up for it?

In this example, a comparable completed job would generate 101 € of contribution. To make up for 103 € of unrecovered contribution and follow-up after one absence, two completed jobs are therefore needed if each absence is considered separately: a single one would bring 101 €, i.e. 2 € short.

Over the year, the cumulative calculation gives:

• 208 absences: 21,424 € ÷ 101 € = about 213 completed jobs to cover the estimated amount.
• 312 absences: 32,136 € ÷ 101 € = about 319 completed jobs.

These results are tied to the assumptions retained. They do not predict the result of any given garage. To adapt the estimate to your workshop, replace the weekly number of appointments, the observed no-show rate, the hourly rate, the loaded pay cost and the real margin on parts with your own figures.

To vary these parameters quickly, you can use ProCalc.app Business Calculator, which calculates financial scenarios in real time. The app is sold as a one-time purchase: you pay once and keep it forever, with no subscription and no data collection. Download ProCalc.app on the App Store to test your own scenarios.

How to limit lost workshop slots

Regular tracking can help your garage spot the causes and the most exposed slots:

1. Record every absence and distinguish it from a cancellation reported in advance.
2. Confirm the appointment and remind the customer how to warn the garage if something comes up.
3. Keep a list of available customers to offer a freed slot to quickly.
4. Note the parts ordered specifically and check whether they can be returned or allocated to another vehicle.
5. Compare the affected slots: times, days and types of job can reveal trends specific to your workshop.

To go further on tracking labour costs and parts, also read our article on the hourly rate and the margin rate on parts for an auto repair garage.

Quick tip: note your workshop's actual no-show rate each month, even approximately. That figure, not a sector average, determines the number of slots to reschedule and the volume of extra jobs to plan in order to cover the absences.

FAQ

How do you calculate the cost of a no-show appointment in an auto repair garage?

First estimate the planned revenue, then separate the labour contribution, the margin on the tied-up parts and the follow-up costs actually incurred. Do not automatically count the full price of the parts as a loss if they can be reused.

Is the 10% to 15% no-show rate a verified average for French garages?

The sources consulted do not allow this range to be confirmed as a national average for workshops. It is used here only to build two hypothetical scenarios. L'Argus reports up to 20% for certain commercial events, without establishing a general average for workshop appointments.

Are parts ordered for a customer who does not show up necessarily lost?

No. They can be kept for a later job, returned to the supplier or used on another vehicle. Their cost is nevertheless tied up until they are reused or refunded, and the risk is greater for a specific or slow-moving part.

How do you calculate the slots lost per month and per year?

Multiply the number of appointments planned per week by 52 to get the annual volume, then by the observed no-show rate. For an average monthly estimate, divide the annual result by 12.

How many completed jobs does it take to make up for a missed appointment?

Divide the estimated contribution lost by the contribution generated by a comparable completed job, then round up. In the example of the article, the estimated loss is 103 € and the contribution per job is 101 €: two jobs are therefore needed to make up for one absence considered in isolation.

How can you reduce no-show appointments in an auto repair garage?

Confirm appointments, make early cancellations easy, record absences and quickly contact waiting customers when a slot frees up. Tracking the parts ordered for each job separately also helps limit their tie-up.