Updated October 28, 2026
This auto repair shop estimate template doubles as a work order and an approval record. It is built to the strictest common rules, California's, so the estimate, the added-work approval and the final invoice line up, and the bay does not sit idle waiting for a customer to call back.
Quick answer: An auto repair shop estimate should list the vehicle (VIN, plate, odometer), the customer's concern, any diagnostic charge, each part marked new, used, reconditioned or rebuilt, each labor operation, shop fees, sublet work, the total before tax, whether old parts are to be returned, the customer's signed authorization, and a log of added work with who approved it, how, and the date and time.
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An auto repair shop estimate is a price, a work authorization and, in many states, a legal document. California is the clearest example. Its Bureau of Automotive Repair says a shop must give a written estimate before doing any work, the estimate must give the total estimated price for parts and labor and itemize the parts and the method of repair, and if the job will cost more, the shop must contact the customer, describe the added work and cost and get permission before going on (California Bureau of Automotive Repair, A Consumer's Guide to Auto Repair). Other states have similar rules; check yours. The template below is built to meet the stricter version, so it works almost anywhere.
| Section | What to fill in |
|---|---|
| Your shop | [Shop name], [state registration number, e.g. ARD number in California], [address], [phone] |
| Estimate / work order | [Number], [date and time written], [service writer] |
| Customer | [Name], [mobile], [email], [preferred way to approve: call, text or email] |
| Vehicle | [Year, make, model], [VIN], [license plate], [odometer in] |
| Customer concern | [In the customer's words] |
| Diagnosis | [Diagnostic charge, if any], [what is covered: diagnosis only, or diagnosis and repair] |
| Parts | [Each part], [new, used, reconditioned or rebuilt], [price] |
| Labor | [Each operation], [book hours x labor rate, or flat] |
| Shop supplies / fees | [Amount and how it is calculated] |
| Sublet work | [Any work done at another shop, e.g. glass or alignment] |
| Estimate total | [Parts + labor + fees], [sales tax shown separately] |
| Replaced parts | [Customer wants old parts returned: yes/no], [core charges] |
| Authorization | [Customer signature], [date and time] |
| Added work log | [What was found], [added cost], [approved by: name and phone], [date and time], [method: call, text, email] |
These prices are assumptions for illustration. Our free auto repair estimate calculator works out book hours, parts markup, shop supplies and your effective labor rate.
| Line | Detail | Amount |
|---|---|---|
| Front brake pads, new | 1 set | $89.00 |
| Front rotors, new | 2 x $72.00 | $144.00 |
| Labor, front pads and rotors | 1.5 book hours x $145 | $217.50 |
| Shop supplies | 5% of labor | $10.88 |
| Original estimate, before tax | Signed 8:10 am | $461.38 |
| Added: front caliper, sticking (found on teardown) | 1 x $118.00 part + 0.6 hr x $145 | $205.00 |
| Revised total, before tax | Approved by text 10:42 am | $666.38 |
The added-work line is where shops lose money and customers lose trust. The car is on the lift, the tech has found a sticking caliper, and the customer is at work. If nobody reaches them, the bay sits idle. If someone does the work without approval, the shop eats it or fights over it. The fix is a fast, recorded approval: what was found, the added cost and the customer's yes, with their name, number, date and time, which is exactly what the BAR guide asks shops to note for phone approvals.
On newer cars, the first estimate is often for diagnosis only. The BAR guide notes that an estimate may cover the diagnosis alone, or the diagnosis and the repair. Write the diagnostic estimate as its own signed authorization, with the hours and the price, and say what the customer gets for it: the cause found and a written repair estimate. Then write the repair estimate as a second authorization. Customers who know the diagnosis has a fixed price are far less likely to argue about it when the repair is declined, and your tech is paid for the hour on the scan tool either way.
Unmanually is a 24/7 AI Office Manager for auto repair shops that you run by voice. The AI Office Manager answers the phones while your service writer is at the counter, books drop-offs, and when a tech finds more work it texts or calls the customer with the finding and the price, records who approved it and when, and tells the bay to go ahead. See Unmanually for auto repair shops and how much auto repair shops mark up parts.
In California, yes: the Bureau of Automotive Repair says a shop must provide a written estimate before doing any work. Many other states have similar rules, so check yours.
Under the California rules, the shop must contact the customer, describe the added work and cost, and get permission before continuing. For a phone approval, note the name and number of the person who approved it and the date and time.
In California, only if the customer asks before the work is done. Parts returned to a supplier for a core charge or warranty may not be returned, but the customer can see them.
Yes. Show the amount and how it is calculated, such as a percentage of labor, so the final invoice has no surprise line.
Home service businesses answer only about half their calls (Invoca, July 2026), and owners spend about 11 to 16 hours/week on admin. Knowing what to do is the easy part; the money leaks out in the calls you can't take, the quotes nobody chases and the invoices that sit unpaid. Unmanually is a 24/7 AI Office Manager for auto repair shops that you run by voice from your phone:
Sources: Invoca, July 2026 (52% of home-service calls answered by a person, 60M+ calls); admin hours: Time etc / Censuswide 2023 and Amex SME Barometer 2026.
Unmanually is an AI Office Manager that works 24/7 and that you run by voice from your phone. Leave your mobile number and the AI Office Manager calls you right away, the same way it would call back one of your customers. That call is the demo: it answers, books you a 15-minute time with the founder and follows up.
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