How do you make a quote and is it legally binding?
TL;DR, the essentials
- A quote is an offer, not a contract. On its own it does not bind either side: you are not obliged to do the work, and the client is not obliged to pay.
- A quote becomes legally binding once the client accepts it. A contract then exists, built on offer, acceptance, consideration and an intention to be bound.
- A quote is a fixed price, while an estimate is only an approximation that can change. Naming the document correctly protects you.
- Protect yourself with a detailed scope, a validity (expiry) date, a reference to your terms and conditions and written acceptance.
Before you win a job or start a project, you almost always send a quote. But a quote is not just a price on a page: it has real legal weight, and once your client accepts it, it becomes a binding contract. Here is how to make a quote for a client the right way and, just as important, whether a quote is legally binding: what it commits you to, when it turns into a contract, how it differs from an estimate, what to include and how to set a validity date, updated for 2026.
What is a quote, exactly?
A quote (or quotation) is a document in which a business describes a job or a sale and states a firm price, before the work is carried out. In legal terms, it is an offer: you propose specific work, at a fixed price, on set terms, which the client is free to accept or decline.
A quote sits upstream of the invoice. It formalises what you will do, at what price and on what conditions, before the first hour is billed. It should not be confused with a proforma invoice, which is a provisional document, nor with the final invoice, which records a sale that has already taken place.
In one line
A quote is a firm, detailed proposal: it does not force the client to buy, but it commits you to your price for the validity period you state.
Is a quote legally binding?
This is the core question, and the answer hinges on one thing: has the quote been accepted? A quotation, on its own, is an offer, not an agreement. It does not oblige either party to proceed. The business is not legally required to perform the work, and the client is not required to pay simply because a quote was issued.
That changes the moment the client accepts the quote. English law (and most common-law systems) requires four ingredients for a binding contract: a clear offer, acceptance of that offer, consideration (the work in exchange for payment) and an intention to create legal relations. A quote supplies the offer. Acceptance completes the contract.
So a quote is not automatically binding, but it is the foundation of a binding agreement. Because it fixes the price and the scope, an accepted quote becomes the proof of what was agreed, which is exactly why it deserves care.
When does a quote become a contract?
A quote turns into a contract when the client accepts it clearly. Acceptance does not strictly have to be in writing to be valid, a verbal “go ahead” can count, but in a dispute a written acceptance is far easier to prove. In practice, acceptance is shown by:
A written confirmation
An email reply saying “approved” or “go ahead”, or a signature on the quote itself.
A clear date
Which shows the quote was accepted while it was still valid.
Payment of a deposit
Paying an agreed deposit is strong evidence that the client accepted your offer.
Once accepted, the quote binds both parties: you must deliver the work on the terms stated, and the client must pay the agreed price. Changing the price or the scope afterwards requires a fresh agreement, which protects the client and you alike.
Worth remembering
A quote that has been accepted in writing is no longer a proposal, it is a mutual commitment. If a disagreement arises, this is the document a court will look at.
Quote vs estimate: what’s the difference?
People use the words interchangeably, but they carry different weight. Naming the document correctly is one of the simplest ways to protect yourself:
| Quote | Estimate |
|---|---|
| A fixed price you commit to | An approximate figure that can change |
| Binding once the client accepts it | A best-guess, not a firm commitment |
| Best when the scope is clear and defined | Best when the scope is uncertain (open-ended work) |
| The final bill should match the quote | The final bill may differ, within reason |
If you label a document a “quote”, expect to be held to that price once it is accepted. If genuine unknowns mean the price may move, use “estimate” and say so plainly, so the client understands the figure is indicative.
Good habit
Never leave it ambiguous. State clearly on the document whether it is a fixed quote or an estimate. That single word decides how binding the price is.
What should you include in a quote?
Unlike some countries that impose a fixed legal format, the UK and most jurisdictions leave the layout to you. But a professional, protective quote should always cover:
| Element | Why it matters |
|---|---|
| The word “Quote” and a date | States the nature of the document and when it was issued |
| Your business details | Name, address, contact and, if VAT registered, your VAT number |
| The client’s details | Name and address of the customer |
| A detailed scope of work | Each item or service, with quantities and unit prices, described precisely |
| Totals | Net total, VAT (if applicable) and the total payable |
| A validity (expiry) date | How long the price holds good |
| Payment terms | Schedule, any deposit, and how to pay |
| Reference to your terms & conditions | T&Cs covering liability, delays and dispute resolution |
| An acceptance area | A space for the client to sign or confirm agreement |
Note: exact requirements vary by country and by whether you are VAT registered, so check the rules for your jurisdiction. The elements above reflect widely accepted good practice as of Q3 2026. For the invoice equivalent, see our guide on what to include on an invoice.
Why set a validity date on your quote?
Always include a validity (expiry) date, for example “valid for 30 days”. It does two things. First, it gives you room to update prices, so a client cannot come back months later expecting the old figure after your costs have risen. Second, it creates a clear deadline that nudges the client to decide.
While the quote is valid, you are effectively holding your price open. Once the date passes, the offer lapses and you are free to reissue with updated pricing. Leaving out a validity date is one of the most common and costly mistakes: it can leave your offer open indefinitely.
The mistake to avoid
A quote with no expiry date can be accepted at any time, even after your costs have changed. Always state how long the quote stands.
Want clients to accept quotes online?
Our comparison ranks the tools that turn an accepted quote into an invoice in one click, with e-signature built in.
How to make a quote, step by step
Beyond the rules, here is the practical order for building a clear, professional quote:
Add the details
Your business details and the client’s, plus a quote number and date.
Describe the scope
One line per product or service, with quantity, unit price and a precise description.
Work out the totals
Net total, VAT where it applies, and the total payable.
Set terms and validity
Validity date, payment terms, any deposit and a reference to your T&Cs.
Add an acceptance area
A space for the client to sign or reply to confirm agreement.
How to make your quote more binding
To turn a quote into a solid contract and avoid disputes, follow four simple rules:
- Be specific. A vague quote invites arguments later about what was actually agreed. Detail protects you, not the client.
- Get written acceptance. A signature or an email reply saying “agreed” is far easier to prove than a verbal go-ahead.
- Reference your terms and conditions. They cover payment terms, liability and dispute resolution.
- Set a validity date. It lets you update prices and stops a client returning months later at the old amount.
Should you make quotes by hand?
For a one-off quote, a good template will do. But as the volume grows, doing it by hand multiplies the risks: a missing detail, no validity date, inconsistent numbering, and re-keying everything when the quote becomes an invoice. Each gap weakens your contracts and wastes time.
Invoicing software builds the quote from your products and prices, applies the right VAT, offers e-signature and converts an accepted quote into an invoice with no re-keying. It also keeps a clear audit trail of who accepted what and when, which is exactly the kind of evidence that settles a dispute in your favour.
Your next step
Ready to automate your quotes and invoices? See our comparison of the best invoicing software for 2026, or explore our invoicing hub to master quotes and invoices end to end.
Frequently asked questions
Is a quote legally binding?
Not on its own. A quote is an offer, so it does not bind either party until the client accepts it. Once the client accepts, a contract exists, built on offer, acceptance, consideration and an intention to be bound, and both sides are then committed: you must do the work at the stated price and the client must pay it.
What is the difference between a quote and an estimate?
A quote is a fixed price you commit to, and it becomes binding once the client accepts it. An estimate is only an approximation that can change as the work develops. Use a quote when the scope is clear, and an estimate when there are genuine unknowns, but always say clearly which one it is.
Does a client have to accept a quote in writing?
No, acceptance can be verbal and still form a valid contract. But written acceptance, such as a signature or an email reply saying “agreed”, is far easier to prove if a dispute arises later. Paying an agreed deposit is also strong evidence of acceptance.
How long is a quote valid for?
There is no fixed legal duration in most jurisdictions, so you set it yourself, commonly 30 days. Always include a validity or expiry date. It lets you update prices and stops a client accepting the old figure months later after your costs have changed.
What should a quote include?
A clear label (“Quote”) and date, your business details and the client’s, a detailed scope of work with quantities and prices, the net total and VAT where applicable, payment terms, a validity date, a reference to your terms and conditions, and a space for the client to accept. Exact requirements vary by country and by VAT status, so check your local rules.