Mechanic Invoice Template — Labour, Parts, MOT
Labour by the hour or by the job, parts at trade + markup, diagnostic time, MOT/inspection, disposal of old parts and oil. The template separates everything so the customer sees exactly what they paid for.
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What goes on a repair invoice
●Diagnostic / inspection fee. Often credited against repair if proceeded with.
●Labour (per hour or per job). State VRN/registration of the vehicle.
●Parts (with mark-up). List part number and quantity for warranty claims.
●Consumables. Oil, filters, fluids — separate or wrapped.
●MOT / annual inspection (where applicable). Statutory fee — often pass-through.
●Disposal / recycling fee. Old tyres, oil, parts.
How repair shops usually bill
Pay-on-collection is most common; invoice issued at vehicle handover.
Fleet customers: monthly statement with all jobs and 30-day terms.
Always include the vehicle registration and VIN on the invoice — required for warranty and resale records.
Tax notes
Both labour and parts are generally taxable. Some statutory fees (MOT in the UK, certain inspections in the US) are zero-rated or pass-through — list them separately.
Frequently asked questions
Should I credit the diagnostic fee against the repair?
Many shops do — it's a customer-friendly policy. State it on the invoice ('Diagnostic credited' as a negative line) so the customer sees the discount you're giving them.
How do I invoice for warranty work?
Bill the manufacturer or warranty provider per their published rate (often lower than your retail). Reference the warranty claim number; the customer's invoice may show $0 with a note.
How do I bill fleet customers?
Monthly statement listing each job by date with VRN, work done, and total. Attach individual job sheets on request. 30-day terms standard.
Should I list every part?
Yes — by part number and quantity. Customers need it for warranty, insurance, and resale. Vague invoices invite disputes and chargebacks.
A sample repair invoice, line by line
Realistic, copy-and-paste-ready line items mechanics typically use. Prices swing a lot by region, so read these as a rough guide rather than a rate card.
●Diagnostic fee — initial inspection and computer scan (1 hr labour) $135
●Brake job — front pads + rotors (parts + 2 hrs labour at $125/hr) $385
●Oil change — full synthetic, 6.0L (5 qt + filter) $95
●Air-conditioning recharge — R-134a + leak inspection (1.5 hr) $185
●Battery replacement — Group 35, 730 CCA + install + system check $245
●Shop supplies — fluid, rags, fasteners (10% of labour, capped at $35) $28
●Core charge — old brake caliper (refundable on return) (refundable): -$45
Notes: Written estimate provided and approved before work began. Labour billed in 0.25-hr increments per state regulation (Texas, NY, CA, others have specific increments). All work guaranteed 24 months or 24,000 miles on most repairs. ASE-certified technician(s) on file. Parts warranty per manufacturer (typically 12-24 months on most aftermarket; OEM warranty per maker). Core charges refunded on return of old part. Card, ACH accepted; financing available through partner.
When the money actually lands
Auto repair is largely pay-on-completion: customer pays by card or cash when the vehicle is picked up. Most repairs are under $1,500 and paid same-day. Major repairs (engine, transmission, $3-15k) require deposit on parts order and balance on completion. Insurance-funded collision-shop work is the slow-pay lane — adjuster sign-off, supplements approved separately, Net 60-90 cycles. Extended-warranty claims pay through the warranty company at the contracted shop rate (often $80-110/hr), Net 30-60.
Fleet contracts (taxi/Uber drivers, small commercial fleets, delivery services) generate recurring revenue: monthly or quarterly preventive maintenance contracts ($300-1,500 per vehicle per quarter) paid Net 15-30. Recurring residential customers (regular oil change, brake service, tire rotation) come back 2-4x per year if the work was honest. The cash-flow stabilisers are: clear written estimates (no surprise charges), 24-month workmanship warranty (customers return for warranty work, then pay for unrelated repairs), and ASE certification (signals competence to insurance and warranty companies).
Five billing mistakes that hold up your payment
●Not providing a written estimate before work begins. Most states require written estimates approved by customer signature before work over a threshold (often $100-200). Without it, customer can refuse to pay the difference. Written estimate every time; signature on file.
●Lumping diagnostic and repair into one line. Diagnostic work is billable labour — separate from the repair itself. State on the work order: 'Diagnostic — 1 hr at $135.' Then 'Repair — 2 hr at $125 + parts.' Bundling diagnostic into repair lets customers refuse the diagnostic if they decline the repair.
●Forgetting shop supplies as a line item. Fluid, rags, fasteners, gloves, sealants — these add up. Industry standard is 5-15% shop supply on labour (often capped at $25-50). State on every invoice: 'Shop supplies (10% of labour, capped at $35): $X.' Customers who see it as line item accept it; surprise charges generate disputes.
●Not photographing the failed parts. Worn brakes, cracked CV boots, leaking gaskets — photograph them and show the customer. Documented evidence builds trust and prevents the 'did you really replace it?' question. Phone-camera photo of the worn part next to the new part takes 30 seconds and saves hours of explanation.
●Quoting flat-rate without specifying labour hours. Many independent shops compete with dealerships by quoting flat-rate ('Brake job: $385') but failing to disclose what's included. State: 'Brake job: front pads, rotors, machined (if applicable), labour 2 hr. Excludes calipers, hoses, or fluid flush unless added.' Transparency builds trust.
US tax notes for mechanics
Auto-repair labour taxation varies: Texas (residential auto repair labour is taxable), Connecticut (taxable), Hawaii (GET on all services), New Mexico (GRT), South Dakota (services), West Virginia (services). Most states exempt repair labour but tax parts at retail. California: materials only. New York: depends on repair type (capital repair vs maintenance). The unique tax issue: 'shop supply' line is typically taxable (treated as materials).
Federal: Most auto-mechanic shops are sole-prop, LLC, or S-corp. Mechanic deductibles often missed: ASE certification and re-certification (every 5 years; multiple ASE areas), state-license fees, tool depreciation (Snap-on, Mac, Cornwell — substantial annual investment in mechanic tool box), shop equipment (lifts, compressors, alignment machines — Section 179), continuing-ed (manufacturer-specific training), liability and garage-keepers insurance (substantial annual premium), and the under-claimed line — tool replacement (mechanics buy and replace tools constantly; documented business-use is fully deductible).
Not tax advice — confirm specifics with your CPA or state department of revenue.
A few more questions from the shop floor
How do I invoice diagnostic time when the customer refuses the repair?
Bill the diagnostic separately from the repair. State on intake: 'Diagnostic fee: $135 covers initial inspection and computer scan. Diagnostic fee applied to repair if proceeding; charged separately if customer declines.' Customer pays the diagnostic regardless; you stop arguing about whether the diagnostic is 'free with repair.'
Should I list 'shop supplies' as a percentage or a flat fee?
Both are acceptable industry practices. Percentage (5-15% of labour) scales with the size of the job; flat fee (often $15-50 depending on shop and state) simplifies the invoice. Cap percentage models at a maximum ($25-50) to avoid sticker shock on big repairs. State the basis clearly so customers understand.
Can I charge for working on a vehicle the customer brought in 'not running'?
Yes — vehicles that arrive on a tow are billable. Add a line: 'Towing pass-through (per tow company invoice): $X' and 'Vehicle assessment with no-start condition: 1 hr labour.' Bring-it-on-a-tow vehicles often have major issues that justify higher diagnostic fees; quote a range upfront.
How do I handle a customer who claims the repair was unnecessary?
Photo and parts evidence. Save the worn-out parts and offer them to the customer; many states require shops to retain worn parts for X days (varies). Show the diagnostic findings ('measured 2.5mm pad thickness vs spec minimum 3mm') in writing. If the customer remains unconvinced, refer to a third-party (state automotive board, BBB, or written written estimate from another shop). Document everything.
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