Money · Guide · 4 min read

Quoting vs estimating: the difference, and which to send

A quote binds you to the price, an estimate does not, and mixing the two up is how trades end up working for free. When each is right, and the wording that keeps you covered.

By Trade PA · Published 21 September 2026 · Reviewed 15 September 2026

The difference in one paragraph

A quote is a fixed price for defined work. When the customer accepts it, you have a deal: that work, that money. If it takes longer or costs more than you thought, that is your problem, and that risk is exactly what the customer is paying a fixed price for. An estimate is your professional judgement of what the work will probably cost. It is not a fixed price, the final bill can differ, and everyone is supposed to know that going in. The trouble starts because "can you give me a quote" is how every customer opens, whatever they actually need, and because a final bill that wildly exceeds an estimate is not a free pass either: customers are entitled to a reasonable price, and an estimate you knew was fantasy will not protect you.

When to quote

Use a fixed quote when you can define the scope: the fence dimensions, specified fittings or agreed repair. State assumptions and exclusions. Give the offer a validity period, but remember that an accepted quote does not become repricable just because that period later ends. Agree a priced variation before extra work. A validity date controls acceptance of the offer; it is not a general escape from an agreed contract.

When to estimate

Estimate when the job contains genuine unknowns: what is behind the tiles, under the floor, inside the walls of a 1930s semi. Guessing a fixed price across an unknown is not confidence, it is gambling with your own margin. A proper estimate says three things: that it is an estimate, roughly what drives the uncertainty, and that you will flag it before exceeding the figure. That last promise is what keeps the relationship intact when the unknown turns out to be expensive: nobody minds the damp being worse than hoped; everybody minds hearing about it on the final invoice.

The professional move: quote the known, carve out the unknown

Most real jobs are a mix, and the strongest paperwork reflects that: a fixed quote for the defined work, with the unknowables explicitly excluded and priced separately if found. "Excludes any remedial work to joists discovered once the floor is lifted; if required, this will be quoted before proceeding." Now the customer has the certainty they wanted on the known scope, you are not carrying risk you cannot see, and the moment of discovery triggers a conversation and a written variation instead of a dispute. This one structure, quote plus named exclusions plus written variations, prevents most of the arguments the other two approaches create.

The wording that keeps you covered

Label the document, in the title, as the thing it is: Quotation or Estimate. Describe the work specifically enough that "the work" cannot be argued about later, and list what is excluded as clearly as what is included. Put your payment terms on it, deposit, stages, due dates, because the accepted document is where you should present the terms for agreement. Date it, give quotes their validity window, and get acceptance in writing, an explicit reply identifying the version is a useful record. And the habit that costs the most: never let a verbal ballpark float away unrecorded. The number you said on the doorstep becomes the customer's anchor; follow it up the same day in writing, labelled as the estimate it was.

Price it before you paper it

Neither document helps if the number underneath is wrong. Before pricing anything, know what your time actually costs: our real day rate calculator shows what you genuinely earn per hour once admin and costs come out, and it is a sobering input into every quote you write. Confident paperwork on top of an underpriced job just gets you held to the underpricing.

Trade PA can help you prepare a quote from your instructions and keep it with the customer record. You remain responsible for the scope, price and contract wording. Keep a separate written record of agreed changes; do not assume a draft, a voice instruction or an internal note proves the customer accepted them.

Two examples for the same repair

The useful difference is visible uncertainty. Do not use the word “estimate” to conceal a price that you already know is unrealistic. Make tax treatment, disposal, access and the finish clear in both versions. These examples are scope-writing aids, not complete terms.