An estimate does two jobs. It tells a customer what they are buying and what it costs, and it tells both of you what happens when the job turns out different from what you could see on the day. Most estimates do the first well and the second not at all, which is why most disputes are about the second.
What has to be on it
1. Who you are, properly
Business name, address, phone, email, and your licence number where your state requires it on written estimates. A quote without a licence number is the easiest thing for a careful customer to reject.
2. Who it is for, and where the work is
The customer's name and the property address, which are frequently not the same address. Landlords, property managers and adult children arranging work for a parent are all common, and billing the wrong party is a slow way to get paid.
3. A number and a date
An estimate number you can reference on the phone, the date it was prepared, and the date it expires. Thirty days is the usual default.
4. An expiry date that you mean
Material prices move. An estimate with no expiry can be accepted four months later at a price that now loses money, and you are in the awkward position of either honouring it or explaining why not.
5. The scope, in plain language
What you are going to do, in terms the customer understands. "Replace 50 gallon gas water heater, including expansion tank, new flex connections, pan and drain, and haul away of the old unit." Not "WH R and R".
6. What it costs
Whether you break it down line by line is a real decision and not an obvious one. See below.
7. Exclusions
The most valuable section and the one most often missing. Covered in detail further down.
8. What happens if you find something
One sentence: work not listed here that is found once the job begins will be quoted separately and started only with your approval. That sentence prevents most arguments.
9. Permits, and who pulls them
State whether the permit is included in the price, whether the customer is paying it at cost, and who is responsible for arranging inspection.
10. Payment terms
Deposit if you take one, when the balance is due, and what you accept. "Net 14" means nothing to a homeowner; "due on completion" does.
11. Warranty
Separate the manufacturer's warranty on the equipment from your warranty on the labour. They are different lengths and customers routinely assume they are the same.
12. Acceptance
A signature line, or a link they can click. The act of accepting should take under a minute.
The exclusions that prevent most disputes
Almost every plumbing dispute is about something the customer assumed was included. Being specific costs you a small number of jobs and saves you the arguments on the rest.
| Exclusion | Why it is worth stating |
|---|---|
| Work behind finished surfaces | Opening a wall is the single most common surprise, and closing it again is somebody else's trade |
| Drywall, tile and paint repair | Customers assume the hole gets put back. Say who does that |
| Pipe found to be in worse condition than visible | Particularly on repipes and old galvanised |
| Code upgrades triggered by the work | An inspector can require an upgrade you did not quote |
| Anything concealed, buried or inaccessible | You priced what you could see |
| Landscaping and hardscape reinstatement | Relevant to any outside work |
| Mould or asbestos remediation | Not your trade and not your licence |
Line by line, or a single price?
There is a real trade-off here and the right answer depends who is reading.
A breakdown builds trust with a cautious customer and makes a high price feel reasoned. It also invites line by line negotiation, tells a competitor your labour rate if the customer shows them, and encourages "can you leave the expansion tank off".
A single price with a described scope keeps the conversation on the outcome. It asks for more trust, which is easier to earn when the document looks professional and you got there on time.
The common middle ground is grouped scope rather than component pricing: "Water heater and installation, $1,950. Permit and inspection, $85." You have explained where the money goes without publishing your markup.
What to leave off
Your cost. Obvious, and still gets printed occasionally when a price book is exported carelessly.
Apologetic language about the price. "I know this seems like a lot, but" invites a negotiation that had not started yet.
Vague ranges on a fixed job. "$1,800 to $2,600" on a job you have seen reads as not knowing. If it genuinely is variable, say what makes it variable and price the variables.
Terms you have not read. A page of boilerplate copied from another company is worse than none, because you cannot explain it when challenged.
A workable order
- Your details and licence number
- Customer and property address
- Estimate number, date, expiry
- Scope of work
- Price
- Permits
- Exclusions
- What happens if something is found
- Payment terms and warranty
- Acceptance
The free estimate generator lays a quote out in roughly this order and prints it to PDF, if it is useful to work from something rather than a blank page.
This is general guidance, not legal advice. What has to appear on a written estimate, and what makes one binding, varies by state and by contract value. Have a local attorney review your template before you use it at volume.
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