“Roughly how much will it cost?” is reasonable: a client wants to know whether a project is affordable before arranging a visit. Risk arises when a figure given without enough information is remembered as final. Explain what you know and what is missing.
You need not refuse every indication. Explain the method, collect facts and assess whether an estimate has a reliable basis. If decisive information is missing, the next step can be checking rather than inventing a number.
Distinguish three levels
A rough indication concerns a hypothetical case. An estimate uses gathered but unconfirmed information. A final quote describes scope, price and terms checked through your process. Explain these words rather than relying on labels.
The client should understand what may change. “Estimate” without assumptions and limits leaves almost the same ambiguity as a bare price. Communication content and context still matter for an offer's effects, not its title alone.
Questions that change the calculation
- What result do you need?
- How many products, rooms, workstations or visits are involved?
- Which materials or characteristics are selected?
- Is the site accessible and are necessary provisions available?
- Does the service include installation, configuration or other work?
- Are there special deadlines or conditions?
For cleaning, ask about areas and frequencies as well as square metres. For consulting, ask about deliverables and available data. For equipment, verify model and service. Questions should follow the job rather than one universal form.
Offer a useful estimate
Describe the assumed case first. “For three standard devices on an existing network with one visit, I can estimate that configuration. Final price requires model and infrastructure checks.” The client knows what information to provide.
If giving a range, connect its limits to concrete conditions. An excessively broad range is unhelpful. Do not invent average prices without reliable data: explain cost components and the time needed to check them instead.
A progressive calculation example
Suppose the selected product has an illustrative €300 selling price but installation work is unknown. Separate known supply from the service needing assessment. Do not turn a product into a complete package using an arbitrary extra amount.
If checks reveal two person-hours and an accessory, build the offer from those facts. If extra work arises, explain the initial indication against the new scope. Retained assumptions allow fair comparison.
When to pause for checks
If safety, compatibility or access depends on hidden factors, a generic uplift cannot replace inspection. Technical work may need a visit or competent assessment. Precise uncertainty is more useful than an apparently reliable number.
For initial guidance, explain the process and any assessment fees beforehand. Do not introduce a visit fee after calling it free. Agree conditions in advance.
Confirm the summary in writing
After the call, summarise the request, gathered facts and next step. State needed information and expected response time. This reduces numbers being remembered outside context.
In the proposal, remove superseded assumptions and visibly retain unresolved ones. A draft organises items; a shared document should clearly identify an estimate or defined offer for the checked case.
The first figure is not a reference for everything
When new information arrives, recall the standard-case assumptions. The client may remember only the number. Explain changes concretely: higher quantities, another product, an additional site or previously excluded service.
“It was only indicative” is not enough. Show the new scope and checking process. Do not reinterpret a precise commitment retrospectively: assess the relationship and applicable terms. A useful estimate can be explained and updated rather than merely attracting enquiries with the lowest figure.
Prepare items in PreventivOk after gathering data and explain outstanding checks in notes before sharing an estimate. Create your next quote with PreventivOk.