Six Numbers Every Auto Repair Shop Owner Should Check Each Week

Most shop owners know when a week felt busy. Fewer know whether that busy week actually made money. The gap between the two is usually hiding in a handful of numbers you can check in about fifteen minutes every Monday. This guide covers six of them, how to calculate each one without an accounting degree, what tends to move it and what to do when it slips.

Why weekly, and why only six

Monthly reports arrive too late. By the time you see a bad month, four weeks of the problem have already happened. Daily numbers swing too much to be useful. A weekly check sits in the middle: enough data to see a pattern, soon enough to act.

Six numbers is also deliberate. You can track dozens of metrics, but if you only have a few minutes, these six tell you whether cars are coming in, whether customers are saying yes, whether your bays are working and whether the work is holding up.

1. Car count

What it is: the number of repair orders you closed in the week.

How to calculate it: count invoiced repair orders from Monday to Sunday. Count each vehicle visit once, even if it had several jobs on it.

What moves it: marketing, reviews, service reminders, how fast you answer the phone and how many bays and technicians you have available.

When it drops:

• Check whether service reminders went out on schedule. Missed reminders are a common and quiet cause of a slow week.
• Look at your phone and booking response times. Calls that go to voicemail often go to another shop.
• Compare against the same week last year if you have it. Some drops are seasonal, not a problem.

2. Average repair order

What it is: how much revenue each visit brings in on average, often called ARO.

How to calculate it: total invoiced revenue for the week divided by car count. Decide whether you include tax and shop supplies, then stay consistent.

What moves it: the quality of your inspections, how clearly you explain recommended work, your labour rate and your parts pricing.

When it drops:

• See whether every vehicle is getting a full inspection, not just the job it came in for.
• Check whether recommended work is being written up with clear explanations and photos.
• Look at the mix of work. A week full of oil changes and tire swaps will naturally have a lower ARO.

3. Approval rate

What it is: the share of recommended work that customers approve.

How to calculate it: dollar value of approved work divided by the dollar value of all work you estimated, for the week. Measuring in dollars rather than line items gives a truer picture.

What moves it: trust, clarity and timing. Customers approve work they understand. Photos of a worn part, a plain-language note and a quick follow-up usually help more than a long phone call.

When it drops:

• Review a few declined estimates. Were they clear? Did they include photos or just part numbers?
• Separate “needs it now” items from “watch this” items so customers are not overwhelmed.
• Record declined work so you can follow up at the next visit or with a reminder.

4. Technician efficiency and productivity

These two are often mixed up, so it helps to track both.

Metric	Formula	What it tells you
Efficiency	Billed hours ÷ hours actually worked on jobs	How fast techs complete work compared with the labour time you charge
Productivity	Hours worked on jobs ÷ hours paid (clocked in)	How much of the paid day is spent on billable work

What moves them: efficiency depends on skill, tools and having the right parts ready. Productivity depends on workflow: waiting for approvals, waiting for parts, hunting for keys and unclear job assignments all eat paid time.

When they drop:

• If productivity is low, look for waiting time. Slow approvals and late parts are the usual suspects.
• If efficiency is low, check whether jobs are estimated with realistic labour times and whether the right tech is getting the right job.
• Keep a simple job board so everyone can see what is next without asking.

5. Parts margin

What it is: how much you keep on the parts you sell, after what you paid for them.

How to calculate it: (parts revenue − parts cost) ÷ parts revenue, for the week.

What moves it: your pricing matrix, supplier costs, returns and how often parts are sold at cost to close a job.

When it drops:

• Check whether supplier prices changed and your pricing did not follow.
• Look for parts that were ordered but not billed, or returns that were never credited.
• Watch for discounts given at the counter that were never recorded as discounts.

6. Comebacks

What it is: vehicles that return for the same problem after you worked on them.

How to calculate it: count comebacks in the week and divide by car count. Even a raw count is useful if you track it consistently.

What moves it: diagnostic time, parts quality, rushed jobs and how well the work is checked before the car goes back to the customer.

When it rises:

• Note the cause of every comeback: part failure, diagnosis, workmanship or a customer misunderstanding.
• Look for patterns by technician, job type or supplier, and address the pattern rather than the individual incident.
• Add a quick quality check or road test for the job types that come back most.

Comebacks cost you twice: the unpaid labour to redo the job and the trust you lose with the customer. They are worth tracking even when the number is small.

Making it a habit

Pick a fixed time each week, pull the six numbers into one place and write a single line next to anything that moved sharply. Over a few months, you will build your own baseline, which is far more useful than any industry average you might read online.

A few tips:

• Keep the calculations the same every week so comparisons are fair.
• Look at trends over four to eight weeks, not just this week versus last.
• Share the relevant numbers with your team. Service advisors can own approval rate; technicians can see efficiency and comebacks.

If pulling these numbers by hand takes too long, AutoSoftWay keeps estimates with MOTOR labour guides, digital vehicle inspections with photos sent by text, a job board and invoices in one place, so the data behind each metric is already recorded. For more on running a shop, see our auto repair industry guide.

The short version

Car count tells you whether customers are coming in. Average repair order and approval rate tell you whether they are saying yes. Efficiency, productivity and parts margin tell you whether the work is profitable. Comebacks tell you whether it is holding up. Check all six every week and you will spot most problems while they are still small.