Every repair shop produces the same four pieces of paperwork, and almost every shop calls at least one of them something different. Some of that is country (a UK or Irish garage writes a job card, an American shop a repair order), some is software, and some is habit. The documents themselves do four distinct jobs, and mixing them up is how a shop ends up billing work nobody agreed to, or doing work nobody billed.
The short answer
- An estimate (or quote) says what the work should cost, before anyone has agreed to it.
- A repair order (RO) is the working record of a job the customer has authorized: what is being done, by whom, and for how much.
- A work order is the same idea in general-trades and fleet language. In most independent shops it means the repair order, and in the UK and Ireland the paper version is usually called a job card.
- An invoice bills the customer for the work that was actually done.
The dividing line that matters is authorization: nothing moves from estimate to repair order until the customer has said yes to it.
The estimate: the price before the yes
An estimate is a proposal. It should give the customer everything they need to decide, and nothing on it should happen until they do:
- the customer and the vehicle, with its mileage when it came in
- the concern, in the customer's own words
- each proposed job on its own line, with labor and parts shown
- taxes, shown the way customers in your market expect to see them
- how long the price holds
Keep what the car needs now apart from what can wait. A customer looking at one large total tends to decline all of it; a customer who can see which lines are urgent usually approves those and puts the rest off, which is still work you would otherwise have lost.
The repair order: the job itself
Once the customer has approved and the work starts, the estimate becomes the repair order, and the repair order is what the workshop works from. A good one carries:
- The vehicle: VIN, plate and the mileage in.
- The three Cs for each job: the customer's concern, the cause the technician found, and the correction that was made. Written down, they are the difference between "did brakes" and a record anyone can follow a year later.
- Labor and parts lines: hours at the rate that applies, and each part actually fitted.
- The authorization: who approved, when, how (in person, by phone, by a signed link) and the amount they approved.
- Who is doing it, and when the customer was told it would be ready.
Work found halfway through the job needs its own approval, recorded on the repair order the same way as the first. That is the step most often skipped on a busy day, and it is the one that turns into an argument at the counter.
Warning
In some places a written estimate and the customer's authorization are a legal requirement before work starts, not just good practice. California's Automotive Repair Act is a well-known example. Check the consumer-protection rules where your shop operates.
Work order, job card: same job, different word
Work order comes from fleet maintenance and the general trades, where the person approving the work is often an internal manager rather than a paying customer. In an independent repair shop the terms are used interchangeably, and nothing is gained by keeping two documents.
Job card is the everyday term in UK and Irish garages, and it usually means the physical sheet that travels with the car around the workshop. It does the repair order's job, and it has the same weakness when it lives on paper: it is only as current as the last time someone wrote on it.
The invoice: what was actually done
The invoice should match the repair order: the approved work that was done, the parts that were fitted, the mileage out, and what is owed. Work the customer declined does not belong on it. Once it has been sent, it should not change quietly; a correction is a documented reopening or a credit, so the customer's copy and yours always agree.
How one job moves through all four
Booking
The customer describes the concern and books a time. Write their words down; they become the first C.
Estimate
After diagnosis or an inspection, price each job on its own line and send it.
Approval
The customer approves some or all of it. Record who, when, how and how much.
Repair order
The approved work goes to the workshop. Parts are fitted, hours are recorded, and any extra work goes back for its own approval.
Invoice and payment
The finished job is billed for exactly what was approved and done, and paid.
On paper, every one of those arrows is a copy: the estimate rewritten onto a job card, the job card retyped into an invoice. Every copy is a chance to lose the extra half hour, the part fitted late or the approval that was only ever given over the phone.
One record instead of four documents
Shop software can remove the copying by treating the four documents as stages of one record instead of four pieces of paper. The record starts as the estimate, becomes the repair order when work begins and ends as the invoice, and the approval, parts and hours stay attached the whole way.
That is how GarageFlow works: one order keeps one number and changes its prefix as it moves (EST-1042, then RO-1042, then INV-1042). If you want to see it in detail, read how our repair order software handles each stage.