A repair estimate does two jobs at once. It sells the work today, and it is your evidence if the customer disputes the bill in four months. Most estimates are built for the first job and quietly fail the second.
Here is every field that belongs on one, and what it is actually doing there.
Who it is from
- Shop or business name, exactly as it appears on your registration.
- Address, phone number, and email.
- Your licence or registration number, if your state or province issues one.
This is not decoration. A customer deciding between you and a name they found on a marketplace is looking for evidence that you are a real business with a fixed address.
Who it is for, and what they drive
- Customer name and phone number.
- Year, make, model.
- VIN. The one field most solo shops skip and most regret.
- Odometer reading at drop-off.
The VIN and the mileage are the two fields that make an estimate hard to argue with. They pin the document to one specific vehicle on one specific day. Mileage in particular is what defeats “it was already like that” six months and eight thousand miles later.
Identifiers
- A unique estimate number.
- The date it was issued.
- An expiry date. Fourteen days is standard — parts pricing moves, and an open-ended estimate is a promise you did not mean to make.
The work itself
Every line needs four things, and one plain-English sentence above them all:
- What the part or operation is, in words a customer understands.
- Quantity.
- Unit price.
- Line total.
Split parts from labour. Show labour as hours × rate, never as a lump sum — the reasoning is in how to write an estimate that gets approved.
If you are quoting used, aftermarket, or reconditioned parts, say so on the line. Discovering it later is one of the most reliable ways to turn a satisfied customer into a chargeback.
The money
- Parts subtotal and labour subtotal, separately.
- Shop supplies or environmental fees, itemised — never folded into labour.
- Tax.
- Grand total.
- Deposit required, if any, and what it covers.
The parts that protect you
These are the lines nobody enjoys writing and everybody eventually needs:
- That it is an estimate. State that additional necessary work will be quoted and approved separately before it is performed.
- Your authorisation threshold. A named figure — say, anything over $100 above the estimate — that triggers a fresh approval.
- Warranty terms. How long, covering what, on parts and on labour.
- Storage and diagnostic fees, if the customer declines the work.
- The approval record. Customer name, the date and time they approved, and ideally a signature.
That last one is the whole point. An estimate a customer verbally agreed to is a memory. An estimate with a recorded, timestamped approval is a document — and it is what turns a dispute into a two-minute conversation.
What happens next
Once the work is done, most of these fields carry straight over to the invoice. What has to change — and what has to be added — is covered in what every auto repair invoice must include.