Quote vs estimate is a distinction owners blur and contractors pay for. An estimate is the contractor's figure for what the work will probably cost, built from quantities and rates, offered so the owner can decide whether to proceed; it is expected to be close and it is not a promise. A quote is a price the contractor offers to do the work for and will hold for a stated time; when the owner accepts it, it is the contract sum. The same arithmetic produces both, which is why they get confused, and the difference is in what the document says and what it binds. This page sets out that difference, the words each document uses, and how a small contractor moves from one to the other on the $449,075 job used across this site.
An estimate: a figure, its basis and its range
An estimate says: based on the drawings dated such, the quantities below and our current rates, we expect this work to cost about this figure. It shows the lines, because an estimate without lines cannot be checked, and it states what it assumes: no rock, no hazardous materials, owner supplies the appliances. It may state a range or a contingency line, and the estimating software page on this site treats a visible contingency as the test of an honest estimate. An estimate is sent when the owner is deciding whether the project is affordable, before the drawings are final, and it says on its face that it is not a quote. The construction cost estimator on this site produces exactly this document from your own cost per square foot and rates.
A quote: a price, its scope and how long it holds
A quote says: we will do the work described for this price, and this price holds until this date. It carries a scope precise enough that a change is recognisable, exclusions, and terms, because the owner's acceptance makes it a contract. It does not show a range; it shows one number, and the contractor bears the risk that the number is low unless the scope changes. A quote is sent when the drawings and selections are final enough to price, and it is the document the construction quote template on this site prints. The federal payment clause linked below is written for exactly this kind of fixed price: the sum is fixed, the draws are progress against it.
Moving from the estimate to the quote on the worked job
On the worked job the estimate was $449,075 with site work, contingency and markup shown as lines. When the drawings were finalized and the owner made the selections the allowances covered, the contractor re-priced the lines at current supplier quotes, resolved the contingency into either scope or margin, and issued a quote at a fixed sum with a validity date. The difference between the two documents was not the arithmetic but the risk: the estimate said about, the quote said for. A contractor who sends an estimate and later finds the owner treating it as a quote has usually sent a document that did not say which it was.
The words on the page, and the record behind them
Write estimate or quote in the title, say what the document binds and for how long, and keep the lines. An estimate that becomes a quote should be a new document with a new date, not the old one with the word changed, because the owner needs to see that the figure was re-priced. DrawScheduleWorks Pro keeps the estimate's lines, the quote's lines and the contract's schedule of values as one history, so the question of what was promised when has an answer in the record rather than in memory. The IRS's guidance on independent contractors, linked below, is unrelated to the price but is the other document an owner sometimes confuses with a quote when the contractor is a sole proprietor: it decides status, not price.
Questions people ask about quote vs estimate
Is an estimate binding?
No. An estimate is the contractor's expected figure, offered with its basis and assumptions so the owner can decide whether to proceed. A quote is the binding price, held for a stated time, and it should say so.
When should I send a quote instead of an estimate?
When the drawings and selections are final enough to price at a fixed sum and the contractor is prepared to hold that sum. Before that, an estimate with visible contingency is the honest document.
Can an estimate turn into a quote?
Yes, as a new document: re-price the lines at current quotes, resolve the contingency, fix the scope and exclusions, set a validity date, and title it a quote. Changing the word on the old document is how disputes start.