Estimate vs. quote vs. bid: what's the difference for a small contractor?

An estimate is your best informed guess at the price and can change if the job turns out different. A quote is a fixed price for a clearly defined scope, usually good for a stated time. A bid is a price submitted to compete for a job. Whichever you send, write the scope, exclusions, and how long the price holds.

This is general guidance, not legal advice. Rules on estimates, quotes, and contracts vary by state and country, so check your state's rules (for example, your state's contractor licensing board).

The short answer

A bid is a price offered to win work in a competition, usually against a set scope that the customer, a builder, or a property manager wrote. On small residential jobs, customers may use all four words loosely, so what matters most is what your document actually says about the price.

Which one should you send?

Call it an estimate when parts of the job can't be seen or measured until you start, and a quote when you can scope the whole job on site and are ready to stand behind one price. Either way, the wording on the page matters more than the word at the top.

Repair calls where you can't see the whole job

Behind a wall, under a floor, inside an old panel: you may not know the full job until it's opened up. Send an estimate, and say plainly what could change the price and what you'll do if you find something. If you'll bill by the hour plus materials instead, say so on the estimate and bill with the time and materials invoice template.

Estimate wording for hidden conditionsThis is an estimate based on what I could see on [date]. If we find [hidden damage / something different] once the work is opened up, I'll stop, show you, and give you a price for the extra work before doing it. If something has to be made safe right away, I'll do only that and tell you the same day.

Jobs you can fully scope on site

A fence line you've walked and measured, a room you can paint wall to wall, a set number of windows: when the scope is clear, a quote with one fixed price can make the customer's decision easier. Set a date the price holds until, because materials and your schedule change.

Quote wording for a fixed priceQuote #[number]: [scope of work] for $[amount]. This price covers only the work listed above and holds until [date]. Anything outside it will be priced and approved in writing before it's done.

Is an estimate binding?

It depends on the wording and on local law, so write clearly which one it is. Some places have rules about how far a final bill can go past a written estimate, and those rules differ by state and country, so check yours rather than relying on what you read online. On your side, a good habit anywhere: label the document, say what could change the price, and get the customer's written OK before any change.

If a customer later says "but you said it would be $[amount]," your estimate's own wording is what you'll both look at. That's why the next section matters.

What to write so nobody argues later

• Scope. What you'll do, in plain words, one line per task or material. More on this in how to write a contractor estimate.
• Exclusions. What's not included, such as permits, hauling, or repairs you can't see yet.
• Valid-until date. When the price expires, such as 30 days out.
• What could change the price. On an estimate, say it in one sentence. On a quote, say the price covers only the listed work.
• Changes in writing. "Changes to the scope will be priced and approved in writing before the work is done."
• Deposit and payment terms. How much is due before you start and when the rest is due. See putting the deposit on the estimate.
• Sign-off. A signature, or a written "yes" by text or email, and the date. Some states require a signed contract for home-improvement work, so check yours.

Start from the free estimate template, or pick your trade from the estimate templates by trade. Each one prints with your scope, line items, and totals laid out.

When the price changes mid-job

Whether you sent an estimate or a quote, a change in the work means a change in writing. Write down what's changing, the price of the change, and the new job total, get the customer's written OK, and only then do the changed work. See how to write a change order for wording you can copy. If the customer pushes back on the price before the job starts, see what to say when a customer says your estimate is too high.

Frequently asked questions

What's the difference between an estimate and a quote?

An estimate is your best informed guess at the price and can change if the job turns out different. A quote is a fixed price for a clearly defined scope, usually good until a stated date.

What is a bid?

A bid is a price you submit to compete for a job, often against other contractors and usually against a scope someone else wrote, such as plans or a spec sheet.

Is a written estimate legally binding?

It depends on the wording and on the law where you work. Rules vary by state and country, so check yours, and label your document clearly as an estimate or a quote.

Can a contractor charge more than the estimate?

Get the customer's OK first. Put the change, its price, and the new total in writing, and get their approval before doing the extra work. Some places also limit how far a final bill can go past a written estimate, so check your local rules.

Should I call my document an estimate or a quote?

Call it an estimate when parts of the job are unknown until you start, and a quote when you can scope the whole job and stand behind one price. Then make sure the wording inside matches the label.

What's the difference between an estimate and a proposal?

A proposal usually includes the price plus more: your approach, materials, schedule, and sometimes options. For most small jobs, a clear estimate or quote with scope, exclusions, and a valid-until date is enough.