„Roughly what does that cost?“ – this question sits in the inboxes of countless trade and service businesses, and it usually arrives without anything you would need to answer it: no area, no quantity, no time frame, no location. The business calls back, reaches nobody, sends an email, waits. Two days pass before anyone can even start costing the job. A price estimator on your website does not solve this by calculating a price – it solves it by asking the right questions before the message is sent. What comes out is a non-binding range for the enquirer and a complete, priceable case for the business. This article covers which three to five answers you actually need, how to label a range as guidance in a legally sound way, what every additional step costs in participation, when a photo replaces three follow-up calls, and which cases deliberately belong in a conversation rather than in the estimator.
Why a vague enquiry costs both sides time
The starting point is the same in many businesses: the website brings enquiries, but the enquiries bring no basis for work. A free text box labelled „Your message“ accepts whatever the enquirer happens to have in mind – and that is rarely what a costing needs. That the website is the first point of contact is not in doubt: 97 percent of 16- to 74-year-olds in Germany use the internet (Statistisches Bundesamt), 26 percent deliberately look at company websites before hiring, and 40 percent rule out a business without a website from the outset (Bitkom Research). So the path to the enquiry works. What happens next decides whether it becomes a job.
What happens next is often a loop of follow-up questions. The business calls, writes, waits, chases. Each round costs time on both sides, and with every day the chance drops that the enquirer is still waiting for an answer – how strongly response time shapes the outcome is set out in the article on response times for enquiries. The real loss lies elsewhere, though: those follow-up questions cover almost invariably the same three to five details. They are predictable. And what is predictable can be asked before the message is sent.
That is exactly what a price estimator does – and its name is slightly misleading. Its value lies not in the figure at the end but in the structure before it. It asks the questions the business would otherwise ask on the phone, in a fixed order, with options instead of free text and with mandatory entries wherever a gap would make costing impossible. The enquirer gets something back for it: a first sense of what the job will roughly cost. How a form should be built so it does not lose enquiries along the way is described in the article on setting up contact forms properly; the price estimator is the next stage for businesses whose services can be expressed in quantities and scope.
Three to five answers, rarely more
The most common design mistake is an over-long form. Ask everything that might one day be relevant and you have built a questionnaire, not an estimator. A simple rule works as a yardstick: every question must be able to change the costing. If the answer does not move the price, it does not belong in the path – it can be settled later in conversation or during the site survey. In practice three to five details remain per type of job, and they usually fall into the same categories.
Quantity or area
Square metres, linear metres, cubic metres: the size of the job is the strongest price driver in most trades.
Units and scope
How many windows, appliances, rooms or line items? A number instead of a description makes the item priceable.
Year built and condition
New build or older stock decides preparation work, access and material effort – often more than the area alone.
Time frame
A preferred date or period shows whether the job fits your capacity and whether a surcharge for urgency is on the table.
Location and travel
A postcode or place name is enough. It determines the travel, which is a line item of its own in many costings.
Picture of the current state
A photo of the damage or a floor plan answers questions that are hard to ask in words and harder still to answer.
These categories are a menu to choose from, not a checklist to work through. A painting firm needs area, substrate and time frame; a car workshop needs vehicle, year and the nature of the job; a removals firm needs floor area, storey and distance. Three questions that fit your business carry further than eight off the shelf. And the order matters: easy, low-commitment questions first, contact details last. Asking for the phone number first demands trust before anything has been given.
The deletion test for every question
A range instead of a fixed price – and how to label it
A price estimator that outputs an exact figure promises more than it can keep – and ties the business to a statement it cannot make without a site survey. The workable route is a range: „around 2,400 to 3,100 euros“, together with a clear note on what it refers to. Legally the key point is labelling it as non-binding guidance. An estimate is, in case of doubt, not separately payable, as set out in section 632 paragraph 3 (Bürgerliches Gesetzbuch) – so the range is neither an offer nor a commitment. As soon as the estimator names prices to consumers, they must be total prices including VAT and all further components, as required by section 3 (Preisangabenverordnung). Anyone using the small business scheme adds the matching note under section 19 (Umsatzsteuergesetz). Whether prices belong on the website at all is weighed up in the article on showing prices on your website.
For the wording that means: stay concrete without committing yourself. Sentences such as „This range is non-binding guidance based on your answers. The binding price follows after the on-site survey.“ have proved their worth. After that, what counts is that the range holds. If 2,400 to 3,100 euros regularly turns into an invoice for 4,500 euros, that is not only a trust problem: misleading statements about price are a frequent ground for complaint under competition law. 57 percent of the legal questions examined in 2025 concerned misleading practices under sections 5, 5a and 5b of the German act against unfair competition, across 241 court proceedings (Wettbewerbszentrale). An estimate may typically rise by 15 to 20 percent before the business must expressly point this out (Verbraucherzentrale); if the overrun becomes substantial, the right of termination under section 649 (Bürgerliches Gesetzbuch) applies. Which price details are otherwise mandatory on a website is set out in the article on price details and advertising claims.
Scroll table sideways
| Aspect | Guided questions with a range | Blank box „Your message“ |
|---|---|---|
| Details per enquiry | Three to five, structured | Whatever comes to mind |
| Follow-ups before quoting | Rarely needed | Two to four rounds typical |
| Enquirer's expectation | Range known, frame set | Open until the first phone call |
| Comparability of enquiries | Same fields, same structure | Every message built differently |
| Handover into the quote | Fields move into the template | Retyping from prose |
| Effort for the enquirer | Four taps and a photo | An empty box and a lot of doubt |
What every additional step costs
Every extra question lowers the number of people who make it to the end. The most solid figures come from online retail, where abandonment has been studied systematically for years: an average checkout showed 11.3 form fields in 2024, although eight would be enough for most cases (Baymard Institute). Around 70 percent of started purchases are abandoned (Baymard Institute), and 18 percent of those who abandon name an overly long or complicated process as the reason (Baymard Institute). These values cannot be transferred one to one to an enquiry path – somebody looking for a tradesperson typically brings more patience than somebody buying a pair of shoes. The direction still holds: length costs participation.
In practice that means three to five steps with one manageable question each, rather than one long page with twelve fields. A progress indicator makes the route visible – somebody who knows two steps remain abandons less often than somebody clicking into the unknown. Selectable options beat typing, especially on a phone. And mandatory fields stay the exception: anything not strictly needed for the range may be left empty. If visitors arrive but enquiries do not, it is also worth looking at the usual causes collected in the article on visitors without enquiries.
- Three to five steps, one question per step – not one page with twelve fields at once.
- Show a progress indicator so the remaining route is visible.
- Easy questions first, contact details last.
- Selectable options instead of free text wherever the possible answers are known.
- Limit mandatory fields to what the range genuinely needs.
- Offer a step back without losing answers already given.
- Buffer entries so a dropped connection does not cost the whole process.
- Show what will be transmitted before sending – including the files.
Photos, floor plans and other files
For many jobs a picture is the most effective answer. A photo of the leaking connection, the rust damage on a wheel arch or the facade to be painted answers in two seconds what would take three follow-up calls in words. A floor plan as a PDF saves measuring up over the phone. Technically little is needed: a field that accepts several files, a restriction to common image and document formats, a size limit in the range of a few megabytes per file and downscaling of large phone photos so the upload does not fail over the mobile network. A visible confirmation that the file has arrived also matters – otherwise the same enquirer uploads their photo three times.
In data protection terms, uploaded files are enquiry data like any other: processed to handle the enquiry, collected sparingly and deleted once that purpose is fulfilled. State briefly in the form what the files are used for and how long they are kept. If the enquiry turns into a job, retention extends anyway: received business letters must be kept for six years (Handelsgesetzbuch), and tax-relevant documents accordingly (Abgabenordnung). Enquiries that come to nothing do not need that period – a deletion run after a fixed number of months keeps the inbox clean.
One photo replaces three follow-up calls
Selection paths instead of one form for everything
A business with several services cannot build one set of questions for all of them. The details that make a bathroom refit priceable have little in common with those for a heating service. The answer is not a longer path but a branch at the first step: the enquirer picks the type of job, and the following questions follow from it. Three to six paths cover the usual ground in a small business, plus one path for „something else“ that leads into a short free text box.
It gets better still when the page brings the preselection with it. Somebody starting the path from the „Bathroom refit“ service page should not have to answer the first step again – the page topic presets the path and the enquirer joins one step later. For existing customers a separate, shorter path pays off, because address and equipment details are already known; how to separate the two is described in the article on service forms for existing customers. For businesses that mainly allocate appointments rather than price quantities, the route via the service catalogue fits better, as described in the article on the website for service providers.
From the questions into the quote template
An enquiry path is only finished when its answers can be reused without retyping. In practice that means the enquiry arrives as a structured message, with a subject line carrying the type of job and the location, and with fields in the same order as the quote template. If your quote lists items in the order area, scope, condition, date, travel, the questions should be ordered the same way – then an enquiry becomes a quote in a few minutes. Attachments belong in the same message, not in a separate storage location that has to be searched for later. The range that was displayed belongs in the message too: it is the expectation with which the enquirer will read your quote. How enquiries that arrive by phone instead can be assigned to the same evaluation is shown in the article on calls from the website.
Usable on a phone and without barriers
An enquiry path that is hard to operate on a phone loses exactly the people who research in the evening on the sofa. Tap targets of at least 24 by 24 pixels are the minimum under the web content accessibility guidelines at level AA (W3C), and larger areas are advisable. Every field needs a visible, permanently readable label – placeholder text is not enough. That this is frequently missing is shown by the annual analysis of home pages: 33.1 percent of the form fields found were not correctly labelled (WebAIM Million). Since 28 June 2025 the German accessibility strengthening act (BFSG) also applies to many services in electronic commerce; who is affected is set out in the article on the accessible website under the BFSG. What else makes for good operation on a phone is collected in the article on the website on a mobile device.
Edge cases belong in a conversation
Not every job can be calculated, and an estimator that tries anyway produces ranges nobody can hold to. Listed facades, conversions with an unclear substrate, bespoke work, expert-report cases, insurance damage and anything requiring a survey deliberately do not belong in the path. The clean way to handle them is a visible exit: an option reading „My case is unusual“, or a threshold beyond which the path stops giving a range and offers a call back instead. That is not a failure of the function but its honesty – and it guards against an expectation that is hard to meet later.
A second edge case is your own capacity. When the order book is full for the coming months, a quick range is not an advantage but an invitation to disappointment. Then the path needs a note about the next free slot, or a preselection that only shows the services actually being taken on – how to steer demand through the website is described in the article on the full order book. That, too, is qualification: it sorts not only by scope but also by feasibility.
The value of a price estimator lies not in the figure it produces but in the answers it gathers before anyone reaches for the phone.
How XICflow builds the enquiry path
In XICflow the enquiry path is a block of its own, not a form bolted on. You set up the paths by type of job, attach three to five questions to each path, switch on the file upload for damage photos or floor plans and store the calculation rule for the range. If a visitor starts the path from a service page, the first step is preset from the page topic. The path runs on your own domain without embedding any third-party service, and the pages are delivered as static HTML – which keeps loading times short. Which blocks are included is shown in the overview of XICflow services; how a site comes together step by step is described in how XICflow works.
The calculation rule stays your decision – what a square metre costs at your business and where the limits of costing lie is known only inside the business. XICflow takes on the implementation and makes sure the path works with a keyboard and a screen reader, works on a phone and delivers every enquiry complete to your inbox. How finished sites with an enquiry path look can be seen in the example websites in the demos; what building one costs is shown in the price overview. For trade businesses that need the groundwork first, the article on the tradesperson website remains the right starting point – the enquiry path is the step after that.
Sources and Studies