A quote states a price for a defined scope, while an estimate is an informed indication of what the work is likely to cost. In the UK in 2026, either document can affect the agreement with the customer, so the label must match the wording, scope and assumptions.
This is general information, not legal advice. The legal effect depends on the full communication and contract, not the heading alone.
Quote vs estimate in the UK
| Point | Quote | Estimate |
|---|---|---|
| Purpose | Price defined work | Indicate likely cost where details remain uncertain |
| Scope | Should be specific | Can rely on stated assumptions |
| Price movement | Controlled by agreed changes or terms | Can change when measured facts differ |
| Best used for | Work that can be priced with confidence | Investigation, hidden conditions or evolving scope |
| Customer decision | Accept the stated offer | Decide whether to proceed on the stated basis |
Calling a document an estimate does not give unlimited freedom to change the price. Explain what is uncertain and how the final amount will be calculated.
What is a quote?
A quote sets out the work you will provide and the price attached to that scope. A useful 2026 quote names:
- customer and site
- quote number and validity date
- work included
- materials or specification
- exclusions and assumptions
- price and VAT treatment
- deposit and payment stages
- how variations are approved
- acceptance record
The builders quotation template provides a copyable structure.
What is an estimate?
An estimate gives the customer a likely cost where the final scope or quantity cannot yet be confirmed.
State:
- the information available when the estimate was prepared
- the assumptions used
- items that remain unmeasured
- rates or allowances used
- what will trigger a revision
- when you will provide a firmer price
“Estimate: £3,000” is weak. “Estimated £3,000 based on 24m² measured from the plan; final price will use the site measurement and chosen paving” tells the customer what can move.
When should a builder use a quote?
Use a quote when you can define and price the job with reasonable confidence, such as:
- fitting specified internal doors
- replacing a stated number of radiators
- decorating named rooms to an agreed finish
- installing a consumer unit to an agreed scope
- laying a measured area of flooring
The quote should still cover hidden defects and customer changes. Those are controlled through assumptions and variations, not a vague permission to change any price.
When should a trade use an estimate?
An estimate fits work where inspection or opening-up is needed before the scope is known, such as:
- tracing an intermittent fault
- exposing a concealed leak
- opening a roof to assess rotten timber
- diagnosing drainage beneath the ground
- pricing from incomplete drawings
You can estimate the first stage, then issue a quote for the repair after the condition is visible.
Can a quote change?
A quote can change where the contract allows it or the customer agrees a variation. Common reasons include:
- the customer changes the specification
- measured quantities differ under an agreed measurement basis
- hidden conditions fall outside a stated assumption
- statutory or design requirements change the work
- an allowance is replaced by the selected item’s actual cost
Record the change before carrying out non-urgent extra work. State the price and programme effect and obtain approval.
Can an estimate be exceeded?
An estimate can change, but the customer should not receive a surprise final invoice with no explanation. Tell them when the assumptions fail and provide the revised likely total before continuing where possible.
Keep evidence of:
- original estimate
- condition discovered
- revised scope
- rates or quantities used
- customer’s instruction
- updated payment plan
Fixed price, daywork and provisional sums
These are different pricing methods.
Fixed price
A stated amount for the defined scope, subject to the written terms and agreed changes.
Daywork
Time and materials charged at agreed rates. Record hours, people, materials and signed sheets.
Provisional sum
An allowance for work or materials that cannot yet be priced finally. Explain what the allowance includes and how the replacement figure will be established.
Do not mix the methods without labels. A customer should see which lines are fixed and which remain open.
Worked example
A roofer inspects a leak but cannot see the deck beneath the covering.
Estimate: £600–£900 for access, opening the affected area and renewing a local section, assuming rafters are sound.
After opening, two rafters are found damaged. The roofer stops, records the condition and issues a separate quote for the structural repair before proceeding.
The estimate handled the uncertain investigation. The later quote priced the newly visible work.
What should the customer accept?
Ask the customer to accept the document, scope, price basis and terms. Acceptance can be recorded by signature, email or an online action, depending on your process.
Do not start from a message saying only “sounds fine” when the customer has not seen the exclusions or payment stages.
Sendinvo lets the customer open and accept or decline a quote online. An accepted quote opens a draft invoice with the customer, lines and prices carried across.
How does the invoice relate to the quote?
The invoice should follow the accepted scope and approved variations. Do not rename the work so completely that the customer cannot match the two documents.
For stage work, show the original job value, previous invoices, current milestone and balance remaining. The stage payment invoice template gives the layout.
Five mistakes to avoid in 2026
Using both words together
“Quote/estimate” avoids the decision and leaves the price basis unclear. Pick one.
Hiding assumptions
Put the assumptions you have made beside the scope and price, not in an unrelated footer.
Leaving VAT unstated
Say whether the figure includes VAT and show the applicable treatment.
Doing variations on a verbal nod
Record the work, price and approval before invoicing it.
Replacing the accepted document
Keep the original. Issue a referenced variation or revised document so the history remains visible.
FAQ
Is a quote legally binding in the UK?
An accepted quote can form part of a contract, but the legal result depends on the wording and surrounding agreement. Get advice for a disputed or high-value job.
Is an estimate legally binding in the UK?
An estimate is normally an indication rather than a fixed promise, but it still needs an honest basis and clear assumptions. The heading alone does not decide every dispute.
Should a quote include VAT?
State clearly whether VAT is included and apply the correct treatment. A VAT-registered business should show the relevant VAT details when the invoice is issued.
Can I charge for preparing a quote?
You can agree a survey or design fee before doing the work. Tell the customer the amount and whether it is credited against the job.
Final decision
Use a quote when the scope and price can be fixed. Use an estimate when quantities or conditions remain uncertain, and state exactly what will turn the estimate into the final price.
Start a free Sendinvo account to issue the 2026 quote, record acceptance and carry the agreed lines into the invoice.