In short: An AI phone assistant answers the calls that get lost on site. It asks what is broken, where and how urgent, books the survey visit into your calendar and puts real emergencies straight through to the on-call mobile. With EchoCall it starts at €75 per month for 250 minutes of conversation. You keep your number: your mobile only forwards when you do not pick up.
We rewrote this article in October 2026. The previous version quoted a rate of unanswered calls that we attributed to the German trades confederation. We could not find a source for it. The figure is gone, along with a revenue calculation built on it. Instead we show you how to run the numbers for your own business.
Features, a sample call and pricing at a glance are on our page about the AI phone assistant for trades businesses. This guide goes into the detail: which calls the assistant takes, how the emergency line works and how to set up call forwarding.
Why the phone becomes the bottleneck in the trades
According to the German competence centre for skilled labour (KOFA), the German trades are short 97,482 skilled workers, and 59 of 115 trade occupations count as shortage occupations. [1] The national trades confederation ZDH estimates around 200,000 open positions. [2] A business that stretched does not hire someone to answer the phone.
So the phone rings wherever the boss happens to be: under the sink, up a ladder, in a boiler room with no signal. In many small firms the office is the owner's partner at the kitchen table in the evening. A caller who reaches nobody calls the next firm. Immediately for a burst pipe, by the next day at the latest for a bathroom refit.
Five kinds of calls and what the agent does with each
| Call | What the caller wants | What the AI phone assistant does |
|---|---|---|
| New job | bathroom, EV charger, roof, facade: someone to come | asks type, scope, address and time frame, books a survey visit |
| Fault or emergency | heating down, water leaking, power out | recognises urgency, mentions call-out charges, connects the on-call mobile |
| "When is the engineer coming?" | confirm or move the time slot | checks the calendar, confirms or reschedules |
| Quote and invoice | has the quote gone out, can I pay in instalments? | answers what is in the knowledge base, takes the rest as a callback |
| Suppliers and wholesalers | delivery notice, question about an order | transfers to the right person or takes a message |
The biggest difference from voicemail: the caller does not hang up feeling they talked into a void. They have an appointment, an answer or a promised callback. And you do not get a mumbled voice message, but name, number, address and request as text in your dashboard.
Running your emergency line properly
An emergency service stands or falls on what counts as an emergency. You decide that in the prompt, not the agent.
- Define emergencies. For example: water leaking that cannot be shut off, heating down in freezing weather, complete loss of power, a break-in damaging a door or window. Everything else is a normal job for the next working day.
- Mention call-out charges first. If after-hours visits cost more, the agent says so before it connects. That saves arguments on the doorstep.
- Store the on-call number. For a real emergency the agent connects the caller straight to the on-call mobile. If nobody answers there, it records address, problem and callback number in full.
- Danger comes first. For a smell of gas the prompt needs a clear instruction: leave the building, do not touch light switches, call the gas emergency number or 112 from outside. The agent does not replace the fire brigade.
- Test before the first call-out. Call it yourself and play through your three most common emergencies. Only when the agent separates them cleanly does the forwarding go live.
What missed calls cost your business: run the numbers yourself
There are no reliable industry figures on missed calls in the trades. You can get your own in a week: every evening, check your mobile's call log and count the calls you neither answered nor returned.
Then calculate:
missed calls per week × share of new enquiries × share lost to competitors × average job value
An example with assumptions, not measurements:
| Assumption | Value |
|---|---|
| missed calls per week | 10 |
| of which new enquiries (rest: existing customers, sales calls) | 50 % |
| share that goes to a competitor without a callback | 30 % |
| average job value | €400 |
| lost revenue per week | €600 |
| lost revenue per month (× 4.3) | about €2,600 |
Put in your own numbers. Even if your result is a tenth of this, it is above the price of the smallest plan. More on the method in our article on what missed calls really cost.
What an AI phone assistant costs a trades business
With EchoCall you pay for minutes of conversation, about €0.30 a minute, with no setup fee. [3]
| Plan | Minutes per month | Price per month |
|---|---|---|
| Starter | 250 | €75 |
| Basic | 500 | €150 |
| Professional | 1,500 | €450 |
How much do you need? If the agent only takes the calls you miss, 15 calls a week at two and a half minutes each come to about 160 minutes a month. Starter is enough. If you also run nights and weekends for your emergency line through the agent, plan for more.
Setup: your number stays, your mobile only forwards when needed
- Create an account. In the EchoHub with 30 voice minutes and 30 chat conversations for 14 days. The credit card is verified with €1.
- Fill the knowledge base. Services, area covered, opening and emergency hours, call-out charges, what you do not do. Quickest with your website address plus a short document.
- Connect your calendar. Google Calendar, Outlook, Cal.com or Calendly. The agent only books into the slots you open for survey visits.
- Book a number for the agent. A number in the EchoHub. This is where you forward to in the next step.
- Set up call forwarding on your mobile. With the standard GSM codes, dialled like a phone number: [4]
| When to forward? | Code |
|---|---|
| when you do not answer | **61*agentnumber# |
| when you do not answer, after 20 seconds | **61*agentnumber**20# |
| when the phone is off or has no signal | **62*agentnumber# |
| when you are on another call | **67*agentnumber# |
| in all three cases | **004*agentnumber# |
| delete all forwarding again | ##002# |
Enter the number in international format, for example with +49 or +44. Whether forwarding costs extra on your tariff is in your contract. On an office phone system, set up forwarding in the system's menu.
- Call it yourself. Three normal jobs, two emergencies, one invoice question. Wherever the agent struggles, something is missing from the knowledge base.
Where the agent reaches its limits
- Remote diagnosis. The agent records error codes and descriptions like a good call handler, not like an engineer. What is broken is decided on site.
- Prices on the phone. A fixed price for a bathroom refit without a survey is unprofessional, whether a person or an AI gives it. The agent quotes guide prices you approve and books the survey.
- Complaints. An annoyed customer wants the boss. The agent takes the matter seriously, records it in full and makes sure the callback happens.
- Danger. Gas, fire, electric shock: the agent points to the emergency services. It does not replace them.
Data protection and AI disclosure
Since 2 August 2026 callers in the EU must learn that they are talking to an AI (Article 50 EU AI Act). [5] In EchoCall the disclosure is a ready-made building block in the first sentence. Servers are in Frankfurt and Karlsruhe, Germany, and the data processing agreement, technical and organisational measures and subprocessor list are on the GDPR page. Audio recording can be switched off per agent.
Frequently asked questions about AI phone assistants for tradespeople
Do I need a new phone number?
No. Your customers keep calling the number they know. You book an extra number for the agent and set up forwarding on your mobile or phone system, for example only when you do not answer.
What does an AI phone assistant cost a small trades business?
From €75 per month for 250 minutes of conversation, about €0.30 a minute, with no setup fee. For a business that only forwards missed calls, that is usually enough.
Can the agent tell whether it is an emergency?
Yes, by the rules you set. You describe in the prompt what counts as an emergency. For an emergency the agent connects the on-call mobile, otherwise it books a normal appointment.
Can the agent book jobs into my calendar?
Yes, into Google Calendar, Outlook, Cal.com or Calendly, and only into the slots you open for survey visits. Job management software without a direct connection can often be linked through Zapier, Make or n8n.
How do I forward calls to the AI assistant?
On a mobile, dial **61* followed by the agent's number and #. Calls are then forwarded when you do not answer. ##002# deletes all forwarding again. On a phone system, use the system's menu.
Will my customers notice they are talking to an AI?
Yes. In the EU the AI Act requires it since August 2026, and the agent says so in its first sentence. What matters to the customer after that is having an appointment instead of talking to voicemail.
Does the AI assistant replace my office?
No. It answers when nobody can and sorts the calls. Writing quotes, ordering materials and handling complaints stays with you.
Sources
- KOFA Kompakt 7/2026, skilled labour in the German trades (97,482 missing skilled workers, 59 of 115 shortage occupations), German Economic Institute: kofa.de
- ZDH, statement of 3 November 2025 (around 200,000 open positions): zdh.de
- EchoCall pricing: echocall.de/en/pricing
- teltarif.de, GSM control codes for call forwarding (in German): teltarif.de
- Regulation (EU) 2024/1689 (AI Act), Article 50: eur-lex.europa.eu
All links were checked on 6 October 2026.
Read next
- AI voice agent for trades businesses: features, a sample call and pricing
- What missed calls really cost
- Easing the skills shortage with AI telephony
- AI receptionist 2026




