Blog · · 5 min read
Invoice vs Estimate vs Quote
These three documents describe the same job at three different moments, and using the wrong word at the wrong moment is expensive.
Estimate: an approximation
An estimate is your considered guess before the work is scoped. It is not binding, and a client who receives one understands the final figure may move. State what could change it — that sentence is the whole value of calling it an estimate.
Quote: a commitment
A quote is a fixed price you are prepared to be held to, usually for a stated period. Once accepted it generally forms a contract on price and scope. That makes the scope wording, not the number, the risky part of the document.
Invoice: the bill
The invoice comes after the work and creates the debt. It should reference the quote or estimate it follows, so the client can see the agreed figure carried through — and so any variation is visible as its own line rather than an unexplained increase.
The usual sequence
Estimate or quote, then work, then invoice, then receipt. Skipping the first step is what turns a scope disagreement into a payment dispute.
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