Estimate vs. Quote: What's the Difference for Contractors?
An estimate is an approximate price for a job, and the final cost can change. A quote is usually a fixed price for a clearly defined scope that you commit to if the customer accepts. Customers often use the two words as if they mean the same thing. They don't, and the difference matters when the final bill arrives.
Estimate vs. quote at a glance
| Estimate | Quote | |
|---|---|---|
| Price | Approximate. It can change. | Usually fixed for the stated scope. |
| Best for | Jobs with unknowns: repairs, hidden conditions, old buildings | Jobs you can fully define before you start |
| What changes the price | Changes in scope, site conditions or materials, as the estimate states | Normally only an agreed change to the scope |
| Customer expectation | "About this much" | "Exactly this much" |
These are common meanings in the trades, not fixed legal definitions. What protects you is what your document actually says, not only the word at the top.
What is an estimate?
An estimate is your best professional judgment of what a job will cost, based on what you know when you write it. It is common when you can't see everything up front. A plumber can't see inside a wall. An electrician may not know the condition of old wiring until the cover plate comes off.
A good estimate says what it is based on and what could change it. For example: "Final pricing may change if the scope, site conditions, or material selections change."
What is a quote?
A quote is a firm price for a defined piece of work. Once the customer accepts it, they will usually expect to pay that amount and no more, unless you both agree to change the scope. Quotes suit jobs you have done many times and can define exactly, like installing a customer-supplied fixture.
Because a quote is a commitment, it needs a clear scope. If the work turns out bigger than described, you may have to absorb the cost or negotiate a change with the customer.
What about a bid or a proposal?
A bid is an offer to do work at a stated price, often in competition with other contractors. It is common on commercial and public projects. A proposal is usually a longer document. It can include the price, plus your approach, schedule and terms. Depending on how they are written, both can act like an estimate or like a quote.
Which one should you give?
- Give an estimate when parts of the job are unknown, when material prices move, or when the customer hasn't chosen fixtures or finishes yet.
- Give a quote when the scope is fully defined, you have seen everything you need to see, and you are confident in your costs.
- Not sure? Give an estimate and state your assumptions. You can always firm it up once the unknowns are gone.
How to word an estimate so it protects you
- Call it an estimate and use that word throughout. Don't switch between "estimate" and "quote" in the same document.
- List your assumptions. For example: "Assumes existing shut-off valves are in working order."
- List exclusions, such as permits, patching or painting.
- Say what changes the price: scope, site conditions or material choices.
- Add a valid-until date, so an old price doesn't come back months later.
- Agree changes in writing before you do the extra work. A short written change order avoids surprises on the final bill.
For the full list of what belongs on the page, see what to include in a job estimate.
Common questions
Is an estimate legally binding?
It depends on what the document says, what you and the customer agreed, and the law where you work. An estimate is generally understood as an approximation, not a guaranteed price. That does not mean it carries no obligations: once a customer accepts it, the estimate can be part of a binding agreement to do the work on its terms. Also, some states and industries have specific rules for written estimates. For example, some limit how far a final bill can go above a written estimate without the customer's consent. If you are unsure, ask a local attorney or your state licensing board.
Can the final price be higher than the estimate?
Often, yes, when the scope or conditions change. The best practice is simple: tell the customer as soon as you know, explain why, and get their approval before you do the extra work.
Is a quote legally binding?
A quote that the customer accepts can become a binding agreement at that price, depending on its terms and local law. That is why a quote needs a clearly defined scope.
Is an approved estimate the same as a contract?
Not necessarily. In many states, home-improvement work above a certain amount needs a written contract with specific terms. If the customer agrees at their home, they may also have a right to cancel within a few days, for example under the FTC's Cooling-Off Rule. Use a proper contract and give any required notices.
Why DraftForth writes estimates, not quotes
DraftForth is an iPhone app for creating, sending and tracking job estimates. It uses the word "estimate" on purpose. Its default terms say that final pricing may change if the scope, site conditions or material selections change. You can edit those terms to match how you work.
Your customer opens the estimate in a browser and can tap Approve or Decline. Those buttons record a tracking status in your app. They are not an electronic signature, and they don't by themselves prove a contract was formed.
This article is general information, not legal advice. Laws on estimates, quotes and home-improvement contracts vary by state and industry. For advice about your situation, talk to a licensed attorney where you work.