Should I include the vehicle info on the invoice?

Yes — year, make, model, and mileage. It ties the work to the specific car for warranty and future reference, and it's expected on any legitimate repair invoice.

Flat-rate or hourly labor?

Flat-rate per job is standard and predictable; hourly suits diagnostics. The invoice should make clear which you billed so the labor line reads cleanly.

Do shop supplies get their own line?

If you charge them, yes — a small shop-supplies line for rags, fluids, and fasteners is normal, but burying it in labor looks like padding.

Auto Repair Invoice Template (Free)

Essential line items on an auto repair invoice

An auto repair invoice is both a legal proof of service and a warranty document. To comply with state bureau of automotive repair regulations, every auto repair invoice must include:

Shop Header & State Registration: Business name, physical shop or mobile unit address, phone, email, and state motor vehicle repair facility license number.
Vehicle & Customer Metadata: Customer full name, phone number, vehicle Year/Make/Model, VIN (Vehicle Identification Number), license plate number, and incoming odometer mileage.
Diagnostic Surcharges: Computer OBD-II scanning, electrical troubleshooting, or mechanical inspection fees.
Itemized Labor Charges: Billed as flat-rate labor guide hours or actual hourly shop labor ($95–$160/hr).
Itemized OEM / Aftermarket Parts: Part numbers, descriptions, quantities, unit prices, and warranty terms for every installed component.
Shop Supplies & Environmental Fees: Itemized shop supply fee (fasteners, degreasers, shop rags) and hazardous waste recycling fees (used engine oil, coolant, battery core charges).
Payment Terms & Authorization Notice: Customer pre-repair authorization signature reference and payment due terms.

Free Auto Repair Text Template

Copy and paste the template below to build clean digital or paper invoices:

================================================================================
                          AUTO REPAIR INVOICE & RECEIPT
================================================================================
REPAIR FACILITY:                           INVOICE & VEHICLE DATA:
[Your Auto Repair / Mobile Mechanic Name]  Invoice Number: AR-2026-1049
[State Auto Repair Facility License #]    Date: August 3, 2026
[Shop Address & Phone]                     Mileage In: 114,820 / Mileage Out: 114,823

CLIENT & VEHICLE INFORMATION:
Client Name: [Customer Name]               Vehicle Year/Make/Model: 2021 Ford F-150
Phone: [555-0148]                          VIN: 1FTFW1E84MK109482
Email: [customer@email.com]                License Plate: 8XYZ942

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LINE ITEM DESCRIPTION & PARTS LIST                             AMOUNT
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1. Computer OBD-II Diagnostic & Brake System Inspection        $110.00
2. Front Brake Service Labor (Flat-rate 1.8 hrs @ $115/hr)    $207.00
3. Front Ceramic Brake Pads Set (Part #EHT1084)                $78.50
4. Front Vented Brake Rotors x2 (Part #580412 @ $65 ea)        $130.00
5. Shop Supplies Surcharge (4% of labor - cleaners, lubricants) $8.28
6. Environmental Hazardous Fluid & Metal Recycling Fee          $6.50
--------------------------------------------------------------------------------
SUBTOTAL:                                                      $540.28
State & Local Sales Tax (on parts & shop supplies):            $17.50
--------------------------------------------------------------------------------
TOTAL DUE & PAYABLE:                                           $557.78
--------------------------------------------------------------------------------

PAYMENT TERMS & WARRANTY STATEMENT:
Due Upon Completion / Vehicle Delivery. Accepted: Credit/Debit, Apple Pay, Cash.
Parts & Labor Warranty: 12 Months or 12,000 Miles (whichever occurs first).
Thank you for trusting us with your vehicle!
================================================================================

How to bill flat-rate labor vs. hourly diagnostic fees

Automotive labor pricing relies on two distinct billing mechanisms:

Flat-Rate Labor (Standard Repairs): Most mechanical work (starter replacement, brake jobs, water pump swaps) is billed using OEM flat-rate labor guides (e.g. Mitchell 1, ALLDATA, or Chilton). If a brake job pays 1.8 flat-rate hours at your $125/hr labor rate, bill $225 regardless of whether the technician completes it in 60 minutes or 2 hours.
Hourly Diagnostic Fees (Troubleshooting): Complex electrical gremlins, check engine light diagnostics, and intermittent noise troubleshooting cannot be billed flat-rate. Bill an initial 1-hour diagnostic fee ($110–$160) upfront. If further tear-down is required, get written approval before proceeding beyond the initial hour.

Calculating shop supplies and hazardous waste disposal fees

Transparent shop supply line items prevent customer confusion and cover consumable expenses:

Shop Supplies Fee (3%–5% of labor): Covers bulk shop consumables that cannot be itemized individually (brake cleaner spray, shop towels, wire ties, anti-seize lubricant, penetrating oil). Cap the maximum shop supply charge per invoice at $25 to $40.
Hazardous Waste Disposal Fees ($3–$10 flat): Required for legal disposal of toxic fluids (used motor oil, ethylene glycol antifreeze, transmission fluid, old lead-acid batteries). Always list environmental fees as an explicit line item rather than folding them into labor.

Customer authorization and pre-repair inspection

Written Customer Authorization: Under automotive repair regulations, shops must provide an initial written estimate and receive customer approval before commencing work.
Scope Change Authorization: If removing a rusted rotor reveals a leaking caliper or damaged wheel bearing, contact the customer immediately with an updated quote and document the authorization time and phone number on the invoice record.

If you are setting your shop or mobile labor rates, read our comprehensive guide on mobile mechanic labor rates. To compare mobile invoicing apps and driveway payment tools, see our review of the best mobile mechanic invoicing app.