A client asks for "a rough idea of the price", another wants "a firm quote", and a third uses both words for the same thing. The difference matters more than it seems: a quote and an estimate do not commit you in the same way, and mixing them up is a common source of disputes at the end of a job. Here is how to tell them apart and when to use each.
What an estimate is
An estimate is your best judgement of what the job is likely to cost, based on what you know at the time. It tells the client the order of magnitude, not a guaranteed figure.
Estimates are useful when:
- the client is still deciding whether to go ahead at all;
- the scope is not yet known, for example before opening up a wall or a floor;
- you are giving a figure over the phone, without a site visit.
An estimate should say plainly that it is an estimate and explain what could make the final price change.
What a quote is
A quote is a price for a clearly described piece of work. Once the client accepts it, both sides are expected to stick to it: you do the work described for the price stated, and the client pays that price.
A quote suits jobs where you have seen the site, measured, and can describe each task precisely. It usually includes:
- 1a detailed list of the work and materials;
- 2the price of each line and the total;
- 3how long the price is valid;
- 4start date, duration and payment terms;
- 5a place for the client to accept and sign.
How binding a quote is, and what happens if the work changes, depends on the law where you work and on what the document says. When in doubt, check local rules or ask a professional adviser.
The practical differences
| Estimate | Quote | |
|---|---|---|
| Price | Approximate, can change | Fixed for the defined scope |
| Detail | Often summarised | Line by line |
| Site visit | Not always | Usually |
| Client signature | Rarely | Yes, to accept |
| Best for | Early discussions, unknown scope | Decided projects, defined work |
Words are not enough: the content decides
Clients, and sometimes courts, look at what a document says, not only at the word in the title. A document titled "estimate" that lists every task with a total and a signature box can be read as a firm offer. A "quote" full of vague lines leaves room for argument.
So whatever you call it, make three things explicit:
- Is the price fixed or approximate? Say it in a sentence.
- What exactly is included, and what is not? For example, "removal of existing tiles included; repairs to the wall behind not included."
- How long does the offer stand? Material prices move, so a validity date protects you.
Handling changes during the job
Even a precise quote meets surprises: a rotten joist, a pipe in the wrong place, a client who changes their mind. The clean way to deal with it is to stop, explain, and put the change in writing before doing the extra work: a short additional quote, accepted by the client, for the new work only.
This protects the relationship as much as your margin. A client who approved the change in advance does not discover it on the final invoice. And when that final invoice goes out, our checklist on what to put on an invoice helps you get it right first time.
Which one should you send?
My recommendation: give an estimate when the client is exploring and you cannot yet see the whole job, then move to a quote as soon as the scope is clear. Clients generally prefer a firm price, and a detailed quote is also your best protection if the job is ever questioned. If a client is slow to pay once the work is done, our guide on chasing late payers takes over from there.
Summary
| Situation | Send | Make sure it says |
|---|---|---|
| Phone call, no visit | Estimate | That the figure is approximate and why |
| Scope unknown until work starts | Estimate, then quote | What could change the price |
| Site visited, work defined | Quote | Detailed lines, validity, payment terms |
| Change during the job | Additional quote | Only the new work, accepted before starting |