Estimate vs Quote vs Invoice: What Each One Means
Clients use “estimate” and “quote” as if they were the same word. They are not, and the difference matters the day a job costs more than expected.
The short version
- An estimate is your best guess at the price before the work is fully known. It can change.
- A quote is a fixed price for a defined job, valid for a set period. Once accepted, you are expected to hold it.
- An invoice is a request for payment for work done or goods delivered.
Estimates and quotes come before the job. The invoice comes after, or at agreed stages.
When to send an estimate
Send an estimate when you cannot know the full scope yet: a repair where you have not opened the wall, a design project whose brief is still moving.
A good estimate says what it is based on. “Based on a visual inspection, assuming no damage to the subfloor.” Give a range if you can, and say what would make the price move. That one sentence saves the awkward call later.
When to send a quote
Send a quote when the job is defined: you have measured, you know the materials, you know the hours. A quote should state:
- exactly what is included, and what is not;
- the fixed price, with taxes shown;
- how long the quote is valid, for example 30 days;
- the deposit, if you ask for one, and the payment terms.
If the client changes the job after accepting, do not absorb it. Write a new quote for the extra work, or a change order, before you do it.
In the United States, many tradespeople say “estimate” for both. In the United Kingdom and Australia, “quote” is the usual word for a fixed price. Whatever you call it, write on the document whether the price is fixed or approximate.
When to send an invoice
Send the invoice as soon as the work is done, or at the stages you agreed: deposit, midpoint, completion. It should match the accepted quote line for line, plus any approved changes. See what to put on an invoice.
A client who approved a quote for one amount and receives an invoice for another will stop and ask questions. If they match, there is nothing to discuss.
From quote to invoice without retyping
The quote already contains the client, the lines and the prices. The invoice needs the same things, with a new number, a date and a due date. Copying them by hand is where mistakes creep in: a missing line, an old price.
This is what “convert to invoice” does in invoicing tools. In Pronteo, an accepted estimate becomes an invoice in one tap, with every line carried over.
Are estimates and quotes legally binding?
It depends on your country and on what the document says. As a general rule, an accepted quote for a defined job is treated as an agreement on price, while an estimate leaves room to adjust. Local consumer rules can add requirements, especially for work in people’s homes. For large jobs, put the scope in writing and get the acceptance in writing too, even if it is a reply saying “Approved, go ahead”.
Which one should you send?
Unknown scope: estimate, with assumptions. Defined scope: quote, with an expiry date. Work done: invoice, the same day. And when you want part of the money before you start, read how to ask for a deposit.