Quote vs Estimate: What's the Difference for Tradespeople?
Customers use “quote” and “estimate” as if they mean the same thing. They don’t — and as the person doing the work, the difference is the one that lands on you. Give a fixed quote when you meant a rough estimate and you could be stuck doing the job at a loss. Give a vague estimate when the customer expected a firm price and you’ve got a dispute waiting to happen.
Here’s exactly what each one means, where you stand legally, and how to use both without getting caught out.
What a quote actually is
A quote is a fixed price for a clearly defined piece of work. When you give a quote and the customer accepts it, you’ve effectively formed a contract: that’s the price, and you’re expected to honour it.
You can only charge more than the quoted figure if:
- The scope changes — the customer asks for extra work, or something genuinely unforeseeable turns up (rot behind the plaster, a problem you couldn’t have seen).
- You both agree the change in writing before you do it.
That’s why a quote should only ever be given for work you can see and define. Quote a bathroom you’ve surveyed — yes. Quote a “damp problem” you haven’t investigated — you’re asking for trouble.
What an estimate actually is
An estimate is your best, honest guess at what a job will cost, given what you know so far. It’s not a fixed price and it isn’t binding in the same way — it’s an informed approximation, useful when there are real unknowns you can’t price until you’re in.
But “not binding” doesn’t mean “make it up.” The figure has to be reasonable and given in good faith. As a rule of thumb, if the final bill comes in wildly above the estimate with no good reason, a customer can reasonably challenge it — so an estimate that’s deliberately low to win the job, then padded later, is both bad practice and a fast route to a complaint.
If you genuinely can’t tell where the price will land, say so, give a range rather than a single number, and explain what would push it up or down.
Where you stand legally
Two things worth knowing in plain terms:
- An accepted quote is a binding agreement. Price the job properly before you send it, because once it’s accepted, that’s the number.
- Where no fixed price was agreed, the customer is required to pay a reasonable price for the work and materials (this is the default position under UK consumer law). “Reasonable” is judged against what other tradespeople would charge for the same job — which is exactly why a clear, itemised estimate protects you: it’s your evidence of what reasonable looks like.
This isn’t legal advice for your specific situation — if a job is large or unusual, it’s worth getting proper terms in place. But for day-to-day work, the principle is simple: be clear which one you’re giving, and put it in writing.
Quote or estimate — which should you use?
| Use a quote when… | Use an estimate when… | |
|---|---|---|
| The job is | Defined and you’ve seen it | Uncertain or you can’t fully inspect it |
| You can | Price every element confidently | Only price part of it for now |
| The customer gets | Certainty — a firm price | A realistic ballpark, clearly flagged |
| Best for | Bathrooms, rewires, patios, most fixed jobs | Diagnostics, “find and fix”, phased work |
For most defined jobs, a fixed quote wins more work — customers value knowing exactly what they’ll pay, and a firm price reads as confidence. Save estimates for when there’s genuine uncertainty, and be upfront about it.
How to protect yourself, whichever you send
- Label it clearly — write “Quotation” or “Estimate” at the top. Don’t leave it ambiguous.
- List your assumptions — “price assumes existing pipework is sound”, “excludes making good/decoration”. Assumptions are where disputes are won or lost.
- Add a validity period — “valid for 30 days”. It protects you when material prices move.
- Put variations in writing — any extra work gets priced and agreed before you do it, not sprung on the invoice.
- Itemise it — a broken-down price is clearer, more trustworthy, and far harder to argue with than one lump sum. (More on that in how to write a quote for trade work.)
The takeaway
A quote is a promise; an estimate is a prediction. Both are fine — as long as the customer knows which one they’re holding. Be explicit, itemise it, note your assumptions, and give firm quotes for the jobs you can define. Do that and you’ll have fewer arguments, get paid what you’re owed, and look more professional than the competitor who scribbled “approx £2k” on a text.
Queezy builds clear, itemised, clearly-labelled quotes on your phone while you’re still on the job — join the waiting list to quote like this from day one.