Quote vs estimate: what's the difference?
An estimate is an informed guess and a quote is a firm price for defined work, and customers often mix them up. Here's when to use each, what to write, and what can make a quote binding.
An estimate is your best guess at what a job will cost, and the price can move. A quote is a fixed price for a defined piece of work, open for a set time, and if the customer accepts it you're generally expected to stick to it.
Use an estimate when you can't yet see the full job. Use a quote when you can. The label on the page helps but doesn't settle it. What you actually wrote, and what the customer reasonably understood, carries more weight than the heading.
Side by side
| Estimate | Quote | |
|---|---|---|
| Price | An approximate figure or a range | An exact figure |
| Scope | Outline of the likely work | Written out, with what's included and excluded |
| Can the price change? | Yes, within what you've explained | Only if the scope changes and the customer agrees |
| Time limit | Usually none, though it helps to add one | A valid-until date |
| Acceptance | Leads to a quote or a go-ahead | The customer says yes and you have a deal |
| Best for | Early conversations, unknown conditions | Work you've seen and can price |
A third word causes confusion: a "bid" is usually a quote submitted in competition with others. And "ballpark" is an estimate with even less behind it. Tell people which one they're getting, because customers tend to remember the lowest number you said out loud.
When to use each
Give an estimate when
- You haven't seen the job and are pricing from a phone call or photos.
- The cost depends on something hidden, like what's behind a wall or under a floor.
- The customer is still deciding whether the job is worth doing at all.
- Materials prices are likely to move before work starts.
Give a quote when
- You've visited, measured and know what's needed.
- The scope can be written down in plain sentences.
- You can hold your prices until the valid-until date.
- The customer needs a firm figure to compare or to get a budget approved.
A good habit is a two-step process: give an estimate to see if the customer is serious, then visit and give a quote. It stops you spending Saturday mornings pricing jobs for people who were only ever going to spend half of what the work costs.
A worked example
A homeowner asks about replacing 90 feet of wooden fence. From photos you say:
Estimate: for 90 feet of 6-foot fence, removal of the old one included, expect $3,800 to $4,800. The final price depends on the ground, access and whether the existing posts can stay. This is an estimate, not a fixed price. I can give you a firm quote after a visit.
You visit. The posts are rotten, access is fine and the ground is soft. Now you can put a price on it:
| Item | Qty | Rate | Amount |
|---|---|---|---|
| Posts, panels, concrete and fixings | 1 | $2,360 | $2,360 |
| Labour, two people | 32 hours | $55 | $1,760 |
| Removal and disposal of old fence | 1 | $160 | $160 |
| Total | $4,280 |
That lands inside the range you gave, which is what a good estimate should do. If the visit had pushed it to $5,200, you'd want to explain why before the customer sees the number, not after.
Sample wording
An estimate line that can't be misread:
This is an estimate based on what we know today. The final price may be higher or lower. If it looks like going over $4,800, we'll stop and talk to you before doing any more.
Quote terms:
This quote is for the work described above at a fixed price of $4,280, valid until December 1, 2026. It doesn't include moving plants or repairing paving. If we find something we couldn't reasonably have seen, or you ask for changes, we'll agree any extra cost with you in writing before doing the work. To accept, reply "accepted" or tap Accept and pay the 25% deposit of $1,070.
Exclusions, the part that saves arguments:
Not included: permits, utility locating, and painting or staining the new fence. We can add any of these at your request.
What can make a quote binding
This is general information and the law differs from place to place. For a specific contract, ask a local lawyer.
In the US, contracts are mostly state law, but the broad shape is familiar. An offer is a commitment made so that a reasonable person would expect a deal if they say yes. Acceptance is judged objectively and can be stated outright or shown by conduct. So a detailed quote with a fixed price and an Accept button looks like an offer, and a customer who says "go ahead" has likely accepted it. Before they accept, you can generally withdraw it, unless you've promised to keep it open. Paying a deposit or letting you start work may count too.
Three things to know:
- A promise to hold a price on goods can bind you. Under UCC section 2-205, as adopted by states, a merchant's signed written offer for goods that says it will stay open can't be withdrawn during that time, up to three months. Services follow general contract rules instead, but "valid until" is still a promise your customer will take seriously.
- Some trades have their own rules. In California, for example, an auto repair dealer must get the customer's authorization before going over a written estimate. There, "just an estimate" doesn't mean free to change it. Home improvement work has rules of its own in many states too.
- Written contract laws apply. California requires a written contract for home improvement jobs over $500. A one-line quote wouldn't meet that.
In the UK, the Consumer Rights Act 2015 makes this very direct for services sold to consumers. Under section 50, what you say or write about your service can become a term of the contract if the customer took it into account. So a figure in a quote, and possibly in an estimate, can hold you to it. Under section 51, if no price was fixed, the customer must pay a reasonable price and no more. Without a clear number in writing, you may end up arguing about what "reasonable" means.
Common mistakes
- Calling a fixed price an estimate. It feels safer, but it won't help if everything else on the page reads as a firm offer.
- Giving a single number as an estimate. A range sets the right expectation. "About $4,000" gets remembered as $4,000.
- No valid-until date. Without one, a customer can come back in eight months expecting last year's materials prices.
- Vague scope. "Replace fence" leaves room for argument. Length, height, materials and disposal do not.
- Leaving out exclusions. What you didn't price is as important as what you did.
- Treating scope changes as a chat. When the job grows, put the new price in writing first. That's what a change order is for.
- Taking no deposit on big jobs. A signed quote with no money down is an easy thing to walk away from. See how to ask for a deposit.
If you want a quote the customer can accept from their phone, the Programmable Page quote template shows the scope, itemised costs and a valid-until date, with an Accept button and an optional deposit. After that date it can't be accepted, so an old price can't come back to bite you. There's also an instant estimate page that asks a few questions, gives a range and lets the customer ask for a firm quote.
Questions
Is a quote legally binding?
It can be. A detailed quote with a fixed price often works as an offer, and once the customer accepts it you may be held to it. It depends on the wording and local law, so take advice on anything large.
Can I change a quote after it's accepted?
Not on your own. If the work changes, agree the new price with the customer in writing before doing it. If you simply underpriced, you may have to honour the quote or ask the customer to agree a change.
Is an estimate binding?
Usually less so than a quote, but not always free of consequences. Some trades and places have rules about going over a written estimate, and in the UK what you tell a consumer can become part of the contract.
How long should a quote be valid for?
Long enough for the customer to decide and short enough that your costs won't move. Thirty days is a reasonable place to start. Use less if your materials prices change quickly.