Skip to main content
industry

Mechanic Invoice Template

A mechanic's invoice has to tell the same story as the estimate the customer approved: what was wrong with the vehicle, what you did, which parts went in and in what condition, and how the customer authorised any work beyond the original estimate. Customers dispute repair bills when the total does not match what they agreed, or when a line says 'misc' or 'shop supplies'. In some states the content is also set by law: in California, the Bureau of Automotive Repair (BAR) requires registered repair dealers to itemise each labour operation and each part, say whether parts are new, used, rebuilt or reconditioned, and show separate labour and parts subtotals. This template is built around that structure: vehicle year, make, model, VIN and odometer, the complaint, cause and correction, the estimate and authorisation record, diagnosis, labour operations, parts with condition and part number, core charges, disposal fees, separate subtotals and warranty terms. The download is an editable HTML invoice with invoice number, dates, a line-item table and totals. Fill it in your browser, then print it or save it as PDF. It is a layout, not legal advice: check your own state's repair-dealer and sales tax rules.

Draft this invoice
Preview this editable document

Download the HTML file to edit its fields, then print or save as PDF. Totals are entered manually.

What This Template Includes

  • Repair dealer registration number, if your state issues one
  • Vehicle year, make, model, VIN or licence plate
  • Odometer reading
  • Customer complaint, cause found and correction made
  • Estimate total and how the customer authorised it (written, oral or electronic, with date and time)
  • Additional work: revised total, who approved it and when
  • Diagnostic fee
  • Labor operations with hours and rate
  • Parts: description, part number and condition (new, used, rebuilt, reconditioned)
  • Core charges and whether they are refundable
  • Labor subtotal and parts subtotal, shown separately
  • Hazardous waste or disposal fees
  • Replaced parts returned to the customer or kept for core exchange
  • Warranty on parts and labor

How to Create Your Mechanic Invoice

  1. 01

    Describe your work

    Type a plain English description of the services you provided, the client, and the amount.

  2. 02

    AI generates your invoice

    InvoiceQuickly's AI drafts the client, line items, dates, and totals for you to review before saving.

  3. 03

    Review, download, and send

    Check every detail, download the PDF, or use Pro to email the PDF directly to your client.

Recommended Payment Terms

Retail customers normally pay when they collect the vehicle, so the invoice is due on receipt and should be ready, checked against the authorised estimate, before the customer arrives. Mobile mechanics usually take payment at the end of the job. Fleet and business accounts are the exception: they pay on terms such as net 15 or net 30 and reject invoices they cannot match, so put their purchase order or work order number and the vehicle's unit number on every invoice. If you require a deposit before ordering an expensive part, say so on the estimate and show the deposit received as a separate note on the final invoice, rather than lowering the parts price.

Need help writing payment terms? Read our guide to invoice payment terms for best practices and templates.

Tax Information

Sales tax on auto repair depends on the state, and the split between parts and labour is where it matters. In California, the Department of Tax and Fee Administration (CDTFA) says parts are generally taxable while repair labour, maintenance and services such as towing are generally not, and that labour must be listed on its own line. Core charges are taxable: for a new or used part the tax on the core is not refunded even if you refund the core, while for a rebuilt or reconditioned part you refund the tax along with the core. A hazardous waste fee tied to non-taxable repair work is not taxable. Other states tax repair labour or treat parts differently, so check your state revenue department. InvoiceQuickly applies one tax percentage to the whole invoice, so it cannot tax parts while leaving labour untaxed; for a California-style invoice you would calculate the tax yourself and enter it as its own line with the invoice tax set to 0%.

Industry context (2026)

Most mechanics work for dealers and repair shops, but a meaningful share work for themselves. The US Bureau of Labor Statistics' Occupational Outlook Handbook for automotive service technicians and mechanics (page last modified 14 September 2026) reports 825,800 jobs in 2025, median pay of $50,620 a year ($24.34 an hour), and that 15% of these workers are self-employed, with automobile dealers (32%) and automotive repair and maintenance businesses (25%) the largest employers. Those are wages, not shop labour rates, so set your posted rate from your own costs. The paperwork rules come from the states. California's Bureau of Automotive Repair publishes its 'Write It Right' guide (last updated January 2026) for registered repair dealers: estimates and authorisations before work, itemised invoices with part condition and separate subtotals, no generic shop-supply charges, and records kept for at least three years. If you work outside California, check your state's consumer protection or attorney general's office for any repair-shop rules.

Worked example

Worked example (hypothetical; the $150 hourly rate is the shop's own posted rate and 9.25% an illustrative combined California sales tax rate). A customer brings a 2015 Ford F-150, odometer 112,480, to a small California shop: battery light on, headlights dim. The estimate, authorised by phone at 9:15 am on 20 October 2026 by the owner, Dana Price, at (555) 010-0187, is $619.00 plus tax: charging system diagnosis 0.5 hours ($75.00), replace alternator 1.4 hours ($210.00), rebuilt alternator $289.00 and a $45.00 core charge because Dana wants the old alternator back. During the job the technician finds the serpentine belt cracked; the shop calls, quotes $83.50 more, and records 'Additional work authorised by phone, 20 Oct 2026, 11:40 am, Dana Price, (555) 010-0187, revised total $702.50 plus tax'. Final invoice. Labor: diagnosis 0.5 h at $150 = $75.00; replace alternator 1.4 h = $210.00; replace serpentine belt (additional, authorised) 0.3 h = $45.00; labor subtotal $330.00, not taxable. Parts: alternator, rebuilt, part no. 8318-R, $289.00; core charge for the alternator, not refundable because the customer kept the old unit, $45.00; serpentine belt, new, part no. 6K-1040, $38.50; parts subtotal $372.50. Sales tax 9.25% of $372.50 = $34.46. Total $330.00 + $372.50 + $34.46 = $736.96, due on collection. Notes: complaint, cause and correction; 'Old alternator returned to customer'; '12-month or 12,000-mile parts and labor warranty'. Every figure on the invoice traces back to an authorised estimate line.

Common mistakes to avoid

Invoice total higher than the authorised estimate

Extra work found mid-job needs approval before it is done, with the revised total and who approved it recorded. A surprise on the final invoice is the most common start of a repair dispute or chargeback.

One lump-sum 'brake job' line

Without separate labour and parts, the customer cannot check the bill and, in states like California, tax cannot be applied correctly to the parts alone.

Shop supplies as a percentage

A flat percentage for 'shop supplies' is prohibited in California. List the supplies actually used, at the price on the estimate.

Parts without condition or part number

Not saying whether a part is new, used or rebuilt invites a dispute when the customer finds out, and makes warranty claims with your supplier harder.

Cores that are never settled

If the customer returns the old part later, refund the core with a note or credit, and keep the record with the invoice.

Invoicing Tips

  • 1Write the complaint, cause and correction in plain words ('Battery light on, headlights dim. Alternator output 12.1 V at idle. Replaced alternator, tested charging at 14.2 V.'). California's BAR advises against abbreviations such as 'R&R' that the customer cannot understand.
  • 2Record the authorisation before you start: for a phone approval, the date, time, the name of the person who approved and the number you called.
  • 3Stop and get a second approval before doing extra work. Put the revised total, who approved it and when on both the work order and the invoice.
  • 4List each part with its part number and condition. A rebuilt alternator and a new one are different products at different prices, and the customer is entitled to know which went in.
  • 5Show the core charge as its own line next to the part and say whether it will be refunded when the old part is returned.
  • 6Bill sublet work, such as an alignment or glass done by another shop, as its own line naming the work, and disclose it on the estimate.

Related Resources

Frequently Asked Questions

What should a mechanic invoice include?

Your business details (and repair dealer registration number if your state requires one), the customer, the vehicle's year, make, model, VIN or plate and odometer reading, the complaint, cause and correction, each labour operation and each part listed separately with part condition, core and disposal fees, separate labour and parts subtotals, tax, the total, warranty terms and how the work was authorised.

Should parts and labor be listed separately?

Yes. Customers can check each one, and in states such as California the sales tax depends on it: CDTFA treats parts as generally taxable and repair labour as generally not, and says labour must be on its own line. California's BAR also requires separate labour and parts subtotals on registered repair dealers' invoices.

Do I need the customer's approval before extra repairs?

In California, yes: a registered repair dealer must get the customer's authorisation before exceeding the estimate, and record it on the work order and invoice. Other states set their own rules, but recording who approved extra work, when and for how much protects you anywhere.

How do I show a core charge on an invoice?

As a separate line next to the part, marked refundable or not. If the customer keeps the old part, the core charge stands; if they return it, refund the charge. In California the tax on a core for a new or used part is not refundable, while for a rebuilt or reconditioned part it is refunded with the core.

Can I charge for shop supplies?

Not as a general percentage in California: BAR prohibits generic shop supplies or miscellaneous charges and allows only supplies actually used on the vehicle, shown on the estimate and itemised on the invoice. Other states vary, but an itemised line is always easier to defend.

Can I use InvoiceQuickly for mechanic invoices?

For some mechanics. You can type or say the job and InvoiceQuickly drafts an editable invoice with up to 100 lines, notes for the vehicle, complaint and authorisation record, and partial payment tracking on every plan; Pro ($9 a month) adds estimates the customer accepts online, email delivery and payment links through your own Stripe or PayPal account. It has no VIN or odometer fields, no separate labour and parts subtotals, no parts catalogue, and one tax rate per invoice, so a shop that must produce California-style split invoices every day is better served by shop management software.