Auto Repair Invoice Generator
Auto repair is the most consumer-regulated invoicing in the trades: written estimates, authorization before overages, parts disclosure. This invoice (for shops and mobile mechanics billing before payment. See the repair receipt for the paid record) carries the compliance structure: estimate reference, authorization notes, OEM/aftermarket/used parts identified per line.
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| Description | Qty / hrs | Rate | Amount |
|---|---|---|---|
| Diagnostic. Charging system trace (credited on repair) | 1 | $89.00 | $89.00 |
| Alternator, new OEM (Denso) | 1 | $412.00 | $412.00 |
| R&R alternator. Labor | 1.8 | $120.00 | $216.00 |
| Diagnostic credit | 1 | -$89.00 | -$89.00 |
| Subtotal | $628.00 | ||
| Tax (8.9%) | $55.89 | ||
| Total due | $683.89 | ||
What to Know About Auto Repair Invoices
- Many states require written estimates and customer authorization before exceeding them. Some by a fixed percentage, some for any overage; the invoice referencing the estimate and authorization date is the shop's compliance evidence.
- Parts disclosure rules in several states require identifying parts as new OEM, aftermarket, rebuilt, or used. Per line, on the invoice, not in a verbal aside.
- Diagnostic time is billable work product; shops that show it ('diag 1.2 hrs. Code P0455 trace') and credit it on approved repairs have measurably fewer invoice disputes.
- Storage fees for vehicles left after completion are lawful in most states only when disclosed in advance, a standing invoice line and posted policy, not a surprise.
- Shop supplies percentages and hazardous-waste fees are permitted where disclosed; regulators in multiple states have acted against shops treating them as hidden profit lines.
Frequently Asked Questions
What authorization does a shop need before billing more than the estimate?
State rules vary from 'any overage needs consent' to fixed tolerance percentages. But the safe practice everywhere is the same: get authorization (noted with date and method, as this template's notes line does) before the work, and reference it on the invoice.
Why do parts say OEM or aftermarket on the invoice?
Because several states require the disclosure, warranties differ by part type, and the resale/insurance value of the repair depends on it. Identify each part's type on its line. It also justifies price differences customers see online.
Can a shop charge storage fees?
Generally yes for vehicles left after the completion notice. But only where the policy was disclosed up front. The defensible pattern is a posted policy, a dated completion notification, and the fee appearing as its own labeled line.
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