Quoting fundamentals
Quote vs estimate: what is the difference?
Understand when to give a fixed quote, when an estimate is more appropriate, and how to explain uncertainty clearly to a client.
An estimate is an informed approximation of likely cost. A quote is a more definite offer for a defined scope, normally valid for a stated period. The exact legal effect can depend on local law and the wording used, so the safest approach is to label the document accurately and explain its assumptions.
The practical difference
| Estimate | Quote | |
|---|---|---|
| Purpose | Give an early indication of cost | Offer a price for defined work |
| Detail available | Some scope or quantities may be uncertain | Scope, quantities and specification are sufficiently known |
| Price | Expected range or approximate total | Stated total subject to written terms and approved changes |
| Best used for | Exploratory, hidden or early-stage work | Surveyed, measurable and repeatable work |
Neither document should be intentionally vague. An estimate should state what makes the price uncertain; a quote should define what the fixed price covers.
When an estimate is sensible
Use an estimate when important facts cannot yet be confirmed. Examples include tracing a concealed leak, repairing unknown wiring faults, or discussing a renovation before drawings and finishes have been selected.
A useful estimate might say:
Based on the visible condition and an anticipated two days of labour, the work is expected to cost €650–€850 plus tax. This estimate excludes concealed damage. A revised price will be provided after access is opened and the condition is confirmed.
That is more helpful than a single approximate number with no explanation.
When to send a quote
A quote is appropriate when you have surveyed the job, confirmed the specification, measured quantities and checked the main supplier costs. It should include the scope, line items or price breakdown, tax treatment, validity date, payment terms and a process for variations.
For example, replacing six identified sockets with a specified product is usually easier to quote than troubleshooting intermittent power loss across an unknown installation.
Changes after a quote is approved
Even a carefully prepared quote can encounter a client request or hidden condition. Do not quietly add work to the final bill. Pause where practical, describe the change, state the cost and time impact, and obtain approval in a durable form before proceeding.
This is often called a variation or change order. Your original terms should explain the process.
Avoid these confusing labels
- “Quote/estimate”: choose the document you actually intend to provide.
- “Fixed estimate”: this mixes two different expectations.
- “Subject to everything”: broad disclaimers do not replace a clear scope.
- “From €500” without conditions: explain what the starting price includes.
Quick decision checklist
Choose a quote if you can answer yes to these questions:
- Is the result clearly defined?
- Have the important quantities been measured?
- Are the product choices or allowances recorded?
- Can you price the foreseeable labour and access?
- Are the main exclusions and assumptions written down?
If several answers are no, provide an estimate, a paid survey or a defined investigation stage first.
Once the scope is clear, follow the seven-step professional quote process and use the quote contents checklist. For legal or tax treatment specific to your business, seek local professional advice.