# Estimate vs. Quote vs. Bid: What's the Difference?

An estimate is an approximate price that can change once work starts. A quote is a fixed price for a defined scope, usually valid for a set period. A bid is a formal price submitted to compete for a job, often against other contractors on the same plans. A proposal adds scope, options and terms around the price.

## Key takeaways

- Estimate = best guess, can change. Quote = fixed price for a defined scope. Bid = competitive offer on someone else's specs.
- What you call it matters less than what it says. State the scope, what can change the price, and how long the price is valid.
- Use estimates when the job has unknowns, and quotes when you can see the whole job.
- Most residential jobs are won on quotes, not bids, and the follow-up decides more of them than the price does.

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

**Estimate vs. quote vs. bid vs. proposal**

|  | Estimate | Quote | Bid | Proposal |
| --- | --- | --- | --- | --- |
| What it is | Approximate price | Fixed price for a set scope | Formal competitive price | Price plus scope, options and terms |
| Can the price change? | Yes, within stated limits | Only through a change order | Only per the bid terms | Depends on the terms written in it |
| Who writes the scope? | Contractor | Contractor | Usually the owner, architect or GC | Contractor |
| Typical use | Repairs with unknowns, early budgeting | Most residential service and install work | Commercial, public and new-construction work | Larger residential jobs, multiple options |
| Detail level | Low to medium | Medium to high | High, follows bid documents | High |
| Becomes a contract when | Usually it doesn't on its own | Customer signs or accepts it | Owner awards and both sign | Customer signs it |

## What is an estimate?

An estimate is the contractor's best calculation of what a job will cost, given what can be seen before work starts. It's useful when there are real unknowns: a leak behind a wall, a drain line you haven't scoped, a roof deck you can't see under the shingles. A good estimate says what it's based on and what could change it, often with a range or a not-to-exceed amount.

> **Example: an estimate with honest limits**
>
> Illustrative. A plumber is called about water staining on a ceiling below a bathroom. 'Estimate: $450–$900 to open the ceiling, locate and repair the leak, depending on what we find. If the leak is in the shower valve or drain, we'll stop and quote the repair before continuing. Drywall patching not included.'
>
> The customer knows the likely range, where the price could jump, and that they'll get a firm number before it does.

## What is a quote?

A quote is a firm price for a defined [scope of work](https://www.brix.so/learn/scope-of-work). If the customer accepts it within the stated validity period, you do that work for that price, and anything outside the scope becomes a [change order](https://www.brix.so/learn/change-order). Quotes work best when you can see the whole job: a water heater swap, an AC replacement, a panel upgrade, a fence.

Many trades shops quote in [good, better, best](https://www.brix.so/learn/good-better-best-pricing) options, which lets the customer choose a price rather than a yes or no. Quoting from a [flat-rate](https://www.brix.so/learn/flat-rate-pricing) pricebook keeps prices consistent across techs.

## What is a bid?

A bid is a formal price submitted to win a contract, usually against other contractors pricing the same plans and specs. Bids are standard in commercial, public and new-construction work, where the owner, architect or general contractor writes the scope and the lowest qualified or best-value bid wins. Bid terms often say how long the price holds and how it can be withdrawn.

## What is a proposal?

A proposal is a quote dressed for a bigger decision. It includes the price, a detailed scope, options, timeline, warranty, payment terms and often a short case for why you. Remodelers, roofers and HVAC replacement salespeople commonly send proposals, and the signed proposal frequently becomes the contract.

## Which one should you use?

**Which to use, by trade and job**

| Trade | Usually an estimate | Usually a quote or proposal | Usually a bid |
| --- | --- | --- | --- |
| HVAC | Diagnosing intermittent problems | System replacements, repairs after diagnosis | New construction and commercial installs |
| Plumbing | Hidden leaks, drain and sewer work before camera | Water heaters, fixture installs, repipes | New construction rough-in |
| Electrical | Troubleshooting, older homes with unknown wiring | Panel upgrades, EV chargers, generators | Commercial tenant buildouts |
| Roofing | Repairs where decking condition is unknown | Full replacements (with per-sheet decking price) | Commercial reroofs, multi-family |
| General contracting and remodeling | Early budgeting before design is final | Fixed-scope remodels after design | Public and commercial projects |
| Landscaping and lawn care | Cleanups of unknown size | Installs and seasonal maintenance contracts | HOA and commercial maintenance contracts |
| Cleaning | One-time deep cleans of unknown condition | Recurring residential service | Commercial janitorial contracts |

## Is an estimate legally binding?

An estimate on its own usually isn't a binding promise to do the work at exactly that price, but once a customer signs it or you start work on it, it can become part of a contract. What protects you is the wording: say it's an estimate, state what it's based on, give a range or not-to-exceed amount, and require written approval before exceeding it. Rules vary by state, especially for home improvement and auto repair.

> **Signing quotes in the customer's home**
>
> The FTC's Cooling-Off Rule gives buyers until midnight of the third business day to cancel certain sales made at their home (covered sales start at $25 at the buyer's home). It excludes sales made because the customer asked you to come and repair or maintain their personal property, though items sold beyond that repair are covered, and sales needed to meet an emergency.
>
> That means a replacement or upgrade sold during an in-home visit can carry a three-day right to cancel, with required notice. Read the FTC's summary and check your state's home solicitation and home improvement rules, which may add more.

## How do you write an estimate or quote customers say yes to?

1. **Send it fast.** Same day, ideally before you leave the driveway. A quote that arrives in four days competes with the contractor who quoted on site.
2. **Write the scope in plain words.** The customer should understand exactly what they're buying.
3. **Offer options.** Two or three choices beat a single take-it-or-leave-it number.
4. **State validity and what changes the price.** 'Valid 30 days. Hidden rot priced at $95 per sheet.'
5. **Make it easy to accept.** E-signature and a deposit link, not 'call us to schedule'.
6. **Follow up.** Most unsold quotes aren't lost to price; they're lost to silence. See [how to follow up on an estimate](https://www.brix.so/learn/how-to-follow-up-on-an-estimate).

## Common mistakes

- **Calling a fixed price an estimate (or the reverse).** Customers hear 'estimate' as 'it might go up' and 'quote' as 'that's the price'. Use the word that matches what you mean.
- **No expiry date.** A quote accepted 8 months later at last year's material prices loses money.
- **One-number quotes.** No options means no upsell and a yes-or-no decision.
- **No follow-up.** Sending the quote is half the sale. Following up is the other half.
- **Free estimates for jobs that need real diagnosis.** Charge a diagnostic fee where finding the problem is the work.

BRIX builds quotes on site and follows up on every open estimate automatically by text and email, so quotes don't die in the customer's inbox. Accepted quotes turn into scheduled jobs and then invoices.

- [Quotes and estimates](https://www.brix.so/features/quotes-estimates): Builds accurate quotes on site and follows up on every open estimate.
- [Sales automation](https://www.brix.so/features/sales-automation): Follows up every lead and open estimate automatically by text and email, and asks every customer for a review after the job.
- [Invoicing and payments](https://www.brix.so/features/invoicing-payments): Turns finished jobs into invoices and politely chases unpaid ones until the money is in your account.

## Frequently asked questions

### Is a quote more binding than an estimate?

Generally yes. A quote is a fixed price for a stated scope, so once accepted you're expected to do that work for that price, and changes go through change orders. An estimate is an approximation that can change, ideally within limits you've stated in writing.

### Should contractors charge for estimates?

Many contractors offer free estimates for straightforward installs and replacements, where the estimate is a sales visit. For diagnostic work, where finding the problem is the job, charging a diagnostic or trip fee is common and fair. Some credit the fee toward the repair if the customer goes ahead.

### How long should a quote be valid?

Commonly 15 to 30 days for residential work, shorter when material prices are moving. State the validity period on the quote so you're not held to old pricing months later.

### Can a contractor charge more than the estimate?

It depends on the wording and your state's rules. If the estimate states what could change the price and you get the customer's written approval before going over, charging more is normal. Going over without approval invites disputes, and some states limit it for certain types of work.

### What's the difference between a bid and a proposal?

A bid prices a scope someone else wrote, usually in competition with other contractors. A proposal is written by the contractor and sells their own scope, options and approach along with the price. Residential work mostly runs on proposals and quotes.

### Do estimates or proposals sync to QuickBooks?

Many field service and quoting tools can send accepted estimates or the resulting invoices to QuickBooks. Check whether the sync carries estimates themselves or only invoices and payments, and whether it's one-way or two-way. See [QuickBooks for contractors](https://www.brix.so/integrations/quickbooks).

## Related

- [What Is a Scope of Work?](https://www.brix.so/learn/scope-of-work)
- [What Is a Change Order?](https://www.brix.so/learn/change-order)
- [How to Follow Up on an Estimate](https://www.brix.so/learn/how-to-follow-up-on-an-estimate)
- [What Is Good-Better-Best Pricing?](https://www.brix.so/learn/good-better-best-pricing)
- [What Is Close Rate?](https://www.brix.so/learn/close-rate)
- [Contractor Estimate Template](https://www.brix.so/templates/estimate-template)
- [Estimate Follow-Up Templates (Text and Email)](https://www.brix.so/templates/estimate-follow-up-templates)
- [Contractor estimating software that quotes on site and chases every open estimate](https://www.brix.so/features/quotes-estimates)
- [How to Price Contracting Jobs for Profit: The Complete Guide](https://www.brix.so/guides/how-to-price-jobs)
- [Scheduling and Dispatch Software That Puts the Right Crew on Every Job](https://www.brix.so/features/scheduling-dispatch)

## Sources

- [FTC: Buyer's Remorse: The FTC's Cooling-Off Rule May Help](https://consumer.ftc.gov/articles/buyers-remorse-ftcs-cooling-rule-may-help) (checked 2026-10-12)
- [FTC: FTC Approves Changes to Cooling-Off Rule ($25 in-home threshold retained)](https://www.ftc.gov/news-events/news/press-releases/2015/01/ftc-approves-changes-cooling-rule) (checked 2026-10-12)

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Written by BRIX Editorial Team. Last updated 2026-10-12. General information, not tax, legal or financial advice.
Canonical: https://www.brix.so/learn/estimate-vs-quote-vs-bid