Auto Repair Estimate Template: Parts, Labor and Sample

A customer drops off a car with a grinding noise from the front wheels. Before a technician touches a bolt, the shop needs an auto repair estimate template filled in with the vehicle details, what was found, what will be replaced, the parts and labor cost and the customer's signature. In several states that written estimate is a legal requirement, and everywhere it is the document that stops "I never agreed to that" at pickup.

This guide covers the fields an auto repair estimate needs, how labor and parts are priced, a filled-in brake job sample, how to handle additional work found mid-repair, and the state rules shops should know about.

What an auto repair estimate is

An auto repair estimate is a written statement of the repairs a shop proposes and their expected cost, given to the customer for approval before work starts. Once signed, it becomes the authorization for the repair order. The final document, the invoice, must then match what was approved plus any additional work the customer agreed to. The auto repair invoice template shows that final step.

Auto repair estimate fields

Section	Fields
Shop	Name, address, phone, state registration or licence number where required
Estimate	Estimate / RO number, date, time, service advisor, valid until
Customer	Name, phone, email, preferred contact method for approvals
Vehicle	Year, make, model, engine, VIN, plate, odometer in
Concern	Customer's description in their words
Diagnosis	What was found, with measurements where useful
Repairs	Each job with labor and parts as separate lines
Parts detail	Part description, quantity, price, type (new OEM, aftermarket, used, rebuilt)
Fees	Diagnostic, shop supplies, hazardous waste disposal
Totals	Parts, labor, fees, tax, total
Authorization	Signature, date, return-of-replaced-parts choice

At the counter, many shops record the concern and initial inspection on a job sheet, then build the estimate from it once the technician has diagnosed the car.

How labor and parts are priced

Labor

Shops usually charge labor using a standard time for each operation multiplied by the shop's hourly rate. If a job is rated at 1.5 hours and the rate is $140, labor is 1.5 x 140 = $210, whether the technician takes 1.2 or 1.8 hours. Write the hours and the rate on the estimate so customers can see the basis.

Parts

List each part with its quantity and price, and say what kind of part it is. Customers care about the difference between original-equipment, aftermarket, used and rebuilt parts, and some state rules require shops to disclose it. Clear descriptions matter; our guide on writing line item descriptions applies directly. Shops that also sell parts over the counter use a separate auto parts invoice.

Fees

Shop supplies (cleaners, rags, small hardware) are often a percentage of labor with a cap, and hazardous waste or tyre disposal fees may apply. State them as separate lines so they are not a surprise.

Auto repair estimate sample: front brakes

Main Street Auto Care - Estimate RO-58213 | 12 Nov 2026, 9:40 am | Valid 30 days
Customer: Chris Navarro, preferred contact: text | Vehicle: 2019 compact sedan, 2.0L, VIN on file, odometer 68,412
Concern: grinding noise when braking. Diagnosis: front pads worn to 2 mm, rotors scored below minimum thickness; rear pads 6 mm, OK.
Description	Type	Qty / hrs	Unit price	Amount
Labor: replace front brake pads and rotors, clean and lubricate slides	Labor	1.5 hrs	$140.00	$210.00
Front brake pad set, ceramic	New, aftermarket	1	$68.00	$68.00
Front brake rotors	New, aftermarket	2	$74.00	$148.00
Brake fluid top-off and hardware kit	New	1	$22.00	$22.00
Shop supplies (8% of labor, max $35)	Fee	1	$16.80	$16.80
Parts subtotal				$238.00
Labor and supplies subtotal				$226.80
Sales tax on parts at 8% (example rate)				$19.04
Estimated total				$483.84
Diagnostic fee $0 (included with approved brake repair). Replaced parts: [ ] return to me [ ] dispose. Customer authorization: ____________ Date ______

Math check: parts = 68 + 148 + 22 = 238. Shop supplies = 8% of 210 = 16.80, below the $35 cap. Labor and supplies = 210 + 16.80 = 226.80. Tax at 8% on parts = 19.04. Total = 238 + 226.80 + 19.04 = 483.84. Some states tax labor and supplies on vehicle repairs too; check the rule in your state, and see our guide to showing sales tax on US invoices.

Diagnostic and teardown estimates

Some faults cannot be priced until the shop has tested or partly disassembled the vehicle: an intermittent electrical problem, an engine noise, a transmission that slips. In those cases, write a first estimate for the diagnosis itself:

• Diagnostic time: for example 1.0 hr at $140 = $140, to scan codes, road test and perform pinpoint tests.
• Teardown and reassembly, if needed to inspect internal parts, with its own price, and a note on whether reassembly is included if the customer declines the repair.
• What the customer will receive: a findings summary and a repair estimate before any repair work starts.

Customers accept diagnostic charges far more readily when they know the amount in advance and what they get for it.

Urgent, recommended and monitor items

Inspections often turn up more than the customer came in for. Instead of one long list, group findings on the estimate by priority:

Priority	Example	Estimate
Safety, repair now	Front pads at 2 mm, rotors below minimum	$483.84
Recommended soon	Coolant due by mileage interval	$149.00
Monitor	Rear pads at 6 mm; recheck at next service	No charge

Ask the customer to approve or decline each group, and record declined safety items on the estimate. That record protects the shop if a declined item later fails.

Additional work found during the repair

Suppose the technician finds a leaking front caliper while replacing the pads. The right process is:

1. Stop work on the new item.
2. Contact the customer, explain the finding and price it: caliper $96 + 0.5 hrs labor $70 + tax on part.
3. Record approval on the estimate: date, time, method, name of the person approving, and the revised total.
4. Only then continue.

Writing this down protects the shop if the customer disputes the bill, and in some states it is required before additional charges can be made.

State rules on written estimates

Several states regulate auto repair estimates. In California, for example, the Los Angeles County Department of Consumer and Business Affairs explains that shops must give a written estimate before starting repairs and cannot charge more than the estimate without the customer's permission, and that repair shops must be registered with the Bureau of Automotive Repair. Other states have their own rules, some with dollar thresholds or a requirement to offer replaced parts back. Check the consumer protection agency in your state. This is general information, not legal advice.

Variations for other auto businesses

• Mobile mechanics: add a call-out or travel fee line and note any work that cannot be done roadside. See the mobile mechanic invoice template.
• Tyre shops: list tyre size, load and speed rating, mounting, balancing, valve stems, disposal and alignment. The tyre shop invoice template shows the typical lines.
• Body shops: estimates are often prepared for insurers, with panel-by-panel labor (body, refinish, mechanical) and paint materials. Keep the customer's authorization separate from the insurer's approval.

Common mistakes

• Not recording the odometer and VIN, which matter for warranty and disputes.
• Combining parts and labor into one price per job.
• Starting additional work on verbal approval with nothing written down.
• Not stating the part type, then arguing about aftermarket versus original parts at pickup.
• No authorization signature on the estimate.

Create your estimate

You can create an auto repair estimate in our invoice generator: rename the document to Estimate, put vehicle details and the diagnosis in the notes, list labor and parts as separate lines, and download a PDF for the customer to sign. It is free, and you do not need to register. When the car is ready, reuse the same lines as the final invoice.