- Invoca's 2024 data found fewer than 3% of callers sent to voicemail leave a message, so an unanswered after-hours call is usually a lost call.
- Pick between missed-call text-back, a live answering service, an AI receptionist or a mix, and check what your field service software already includes first.
- Let the system book only the services and appointment times you have approved, and give gas, CO, flooding and electrical hazards a fixed route to a person.
- At 200 calls a month, an AI receptionist vendor's October 2026 roundup puts AI receptionists at roughly $150 to $550 and live answering services at about $777 to $1,965; check each provider's own pricing before you buy.
- Judge the setup by completed jobs and profit, not by how many calls it answers.
It's 8:40 p.m. in July. A homeowner notices the air conditioner isn't cooling. They call your company.
Your technicians have gone home. Your office manager finished hours ago. The call goes to voicemail.
Maybe the homeowner leaves a message. More likely, they call the next HVAC company on Google.
The same thing happens at 6 a.m. in January when a furnace quits, or on a Sunday when water starts coming through a ceiling. You don't need to keep your whole office open all night. But you do need a clear plan for what happens when the phone rings.
| The 8:40 p.m. call | Without a plan | With a plan |
|---|---|---|
| Who picks up | Voicemail. | An answering service or AI receptionist. |
| What the caller gets | A beep, and no idea when anyone will call back. | Their details taken and a clear next step. |
| What happens next | They may call the next company on Google. | A booked slot, a promised callback, or the on-call tech for emergencies. |
How big is the missed-call problem?
Invoca, which analyzes business phone calls, put the industry-wide figure in 2024 at roughly one call in four:
of calls to home service businesses are not answered.
Invoca call data for home services overall, published in 2024. Not an after-hours-only figure or a prediction for your company.Voicemail does not rescue many of those calls. The same 2024 Invoca data shows that fewer than 3% of callers who reach voicemail leave a message. If you pay for Google ads or Local Services Ads that run after hours, every unanswered call is ad spend you paid for and lost.
It is also important not to confuse a missed call with a lost job. Some callers are existing customers. Some are outside your service area. Others want a service you don't provide.
Before buying anything, check the last 30 days of your phone records:
- How many calls came in after closing and on weekends?
- How many went unanswered?
- How many were new service requests?
- How many callers did your team reach the next day?
- How many became completed jobs?
Check daytime overflow too. HVAC and plumbing shops often miss the most calls during the first heat wave or hard freeze of the season, even with the office open.
What should happen when someone calls after closing?
Here is an example of the kind of greeting you could use:
Thanks for calling Green Valley Heating & Plumbing. I'm the company's automated assistant. Our office is closed, but I can help you request a service visit or reach the on-call technician. This call may be recorded.
Example after-hours greeting- Collect the basic detailsName, callback number, service address, and a short description of the problem, such as "no heat" or "water heater leaking". Read the address and phone number back before ending the call.
- Check whether the job fitsUse rules you have already approved: service area, job types you handle, and open appointments. Ask only what the next step needs.
- Book a real appointment, or clearly explain the callbackIf the system cannot confirm a slot, it should say so. Taking a request is fine. Calling it a confirmed booking is not.
- Pass emergencies to a personWrite down what gets escalated, who receives it, and what happens if that person does not answer.
Which calls count as emergencies
Your rules decide, but this is a sensible starting point:
| The caller says | What the assistant should do |
|---|---|
| "I smell gas" or "my CO alarm is going off" | Tell them to leave the building now and call 911 or the gas utility from outside. Then alert the on-call tech. Book nothing. |
| Sparks, smoke, or a burning smell from a panel or outlet | If there is smoke or fire, tell them to call 911. Otherwise, pass the call to the on-call electrician. |
| Burst pipe, active leak, or sewage backing up | Ask whether they can shut off the main water valve, then call the on-call plumber. |
| No heat in freezing weather, or no cooling in extreme heat with vulnerable people in the home | Pass the call to the on-call HVAC tech. |
| AC not cooling well, water heater lukewarm, one breaker tripping | Book the first available slot or take a request for a callback. |
Do not use an AI receptionist as a repair adviser. The safety lines above are the only instructions it should give. And only offer overnight service if someone is actually available to provide it.
Should you use an answering service or an AI receptionist?
Decide what your after-hours calls need before you choose the technology. Here is how the options compare:
| Option | Consider it when… | Typical cost | Check before choosing |
|---|---|---|---|
| Missed-call text-back | You want the cheapest way to stop callers going cold. It texts back automatically when a call is missed. | Often included in phone systems and field service software. | Does someone actually reply to those texts before morning? |
| On-call phone rotation | Volume is low, and your techs are willing. | $0, plus a tired technician. | Who covers when the on-call tech is on a job? |
| Live answering service | You want a person handling after-hours conversations. | About $777 to $1,965 a month at 200 calls, per one AI receptionist vendor's roundup. | Can they book jobs, or do they only take messages? |
| AI receptionist | You want to automate a defined process for collecting details and booking approved jobs. | Roughly $150 to $550 a month at 200 calls, per the same roundup. | Does it work with your actual schedule, service area, and booking rules? |
| A mix of AI and people | You want routine requests handled automatically, with people taking over emergencies. | AI cost plus your on-call arrangement. | Does the handoff work, and who answers it overnight? |
Check what your field service software already offers
The three big field service platforms all sell their own AI answering. Review yours before paying to build a separate tool.
| Platform | Built-in option | What to know |
|---|---|---|
| ServiceTitan | AI Voice Agent | Books jobs using configured job types and availability, supports after-hours and overflow routing, and escalates to a person. Bills per handled call; Carly, an AI receptionist vendor, reports $2.75 a call. |
| Housecall Pro | CSR AI | Answers and summarizes calls; its dashboard reports jobs and estimates booked during and after hours. No published price; text answering was in early testing in 2026. |
| Jobber | AI Receptionist | A $29 a month add-on with 30 conversations included, then $0.79 each; unlimited on the Plus plan. Needs a Jobber dedicated phone number and books through your online booking form. |
A custom setup should solve a clear gap, such as an emergency rule, a booking rule, or a software connection your existing tools cannot handle. Ask any implementation partner, including us, to explain that gap before recommending a build.
How much does an after-hours answering service cost?
Carly, a company that sells AI receptionists, compared list prices in an October 2026 roundup. It reports $2.75 per handled call for ServiceTitan's Voice Agent, which is $550 at 200 calls a month. ServiceTitan's own FAQ says all handled calls count toward billing, regardless of the caller's intent or the outcome. The same roundup puts other AI receptionists at about $149 to $385 for that volume, and live answering services at about $777 to $1,965. Treat these as a starting point, and check each provider's own pricing page and account requirements before purchasing.
Ask what a heat-wave or cold-snap month would cost. Per-call and per-minute pricing can double your bill in the weeks your phone rings most.
Your quote should also spell out:
| Cost item | What to ask |
|---|---|
| Setup fee | Is there one, and what does it cover? |
| Phone or software subscription | Is one required to use the assistant? |
| Usage charges | What counts as a billable call? ServiceTitan bills every handled call, whatever the outcome. |
| After-hours and weekend rates | Is a 2 a.m. call priced like a 2 p.m. call? |
| Connecting other systems | Is connecting your scheduling or CRM software priced separately? |
| Ongoing support and changes | Who updates the rules and scripts, and what does that cost? |
| Testing | Are test calls billed? Ask before you start testing. |
Work out what makes sense for your business
Here is the math for a shop taking 120 after-hours calls a month at $2.75 per call:
| Line | Example |
|---|---|
| After-hours calls a month | 120 |
| Cost at $2.75 per call | $330 |
| Profit per completed job after direct costs | $150 |
| Completed jobs needed to cover the cost | 3 (2.2, rounded up) |
a month cover the cost of 120 after-hours calls at $2.75 each, when each completed job leaves $150 after direct costs.
A simple worked example, not a Softpers client result. Every job past the third begins to produce a return.Use your own job margins in this calculation. A $500 invoice does not mean you have $500 available to pay for the service. If you charge an after-hours dispatch fee, count only what is left after paying the technician who answers it.
What rules apply to recording and texting callers?
Most AI receptionists record or transcribe every call. That is useful for checking bookings, but it brings three rules into play:
| Rule | What to do |
|---|---|
| Recording | About a dozen states, including California, Florida, Illinois, Pennsylvania and Washington, require everyone on the call to consent to recording. A line in the greeting such as "this call may be recorded" is the usual way to cover it. |
| Texting | If the assistant texts confirmations or reminders, ask the caller on the call: "Can we text updates to this number?" Marketing texts need separate, explicit consent. |
| Disclosure | Say the caller is talking to an automated assistant. It is honest, it sets expectations, and some states have rules on bots that do not identify themselves. |
This is general information, not legal advice.
A practical 30-day pilot
A pilot is worth running if most of these are true for your company:
Is your company ready for an after-hours pilot? 30 seconds
If your schedule is out of date or nobody owns follow-up, fix that first. Answering more calls will not solve a broken booking process.
- Week 1: Write down your rulesHours covered, services it can book, areas you serve, fees it may mention, which calls are emergencies and who gets them, and what to say when no slot is open. One location and a few common job types are enough.
- Week 2: Test difficult callsCall it yourself with the awkward cases below and fix every failure before customers reach it.
- Week 3: Turn on after-hours coverageKeep daytime unchanged. Each morning, review summaries and bookings for wrong addresses, duplicate bookings and promises your team cannot keep.
- Week 4: Check the resultsCompare completed jobs and profit against the cost. Fix errors before expanding to daytime overflow or more locations.
Week 2: the test calls to run
Tick off each scenario once the assistant handles it correctly.
| Test call | What should happen |
|---|---|
| ☐ The caller says they smell gas | It tells them to leave and call 911 or the gas utility from outside, alerts the on-call tech, and books nothing. |
| ☐ The address is outside your service area, or the job is one you do not do | It says so and books nothing. |
| ☐ There are no appointments left | It takes a request and says when someone will call back, without promising a slot. |
| ☐ The caller asks for an exact repair price | It quotes only fees you approved, such as a dispatch fee. |
| ☐ The caller asks for a person, or the on-call tech does not answer | It follows your escalation route and backup contact. |
| ☐ The caller changes their address halfway through | It reads back the final address before ending the call. |
| ☐ The caller speaks Spanish | It switches language, or takes the details and routes the call the way you decided. |
Week 4: what to measure
Track after-hours calls answered, qualified requests, appointments booked, jobs completed, profit from those jobs, and errors or complaints. Profit is the one that decides whether to keep going. Do not count every booking as new business: some callers would have booked with you the next morning anyway.
Want help with your after-hours calls?
Softpers builds voice AI for service businesses and has built voice agents for roofing companies. Projects start from $3,000 and take 2 to 8 weeks, beginning with a fixed-price pilot of 1 to 2 weeks. Calls forward from your current number, all the time, only after hours, or only when your lines are busy. A free after-hours call review covers three things:
- Where callers drop off. We read 30 days of your call records and show how many after-hours and overflow calls were missed, how many were new service requests, and when they came in.
- What you already own. We check what your phone system and field service software (ServiceTitan, Housecall Pro, Jobber, or another) can already do, so you don't pay twice for the same thing.
- What a pilot must prove. If there is a real gap, we scope a small pilot: one location, after-hours only, with the success measure agreed before anything is built.
If your existing tools already cover the gap, we will tell you.
Frequently asked questions
Who builds AI receptionists for HVAC and plumbing companies?
Three kinds of companies. Field service platforms sell their own: ServiceTitan's Voice Agent, Housecall Pro's CSR AI and Jobber's AI Receptionist. Standalone AI receptionists such as Smith.ai, Rosie and Sameday work beside your software. Custom builders, including Softpers, build an agent around your own rules and systems when neither fits; Softpers projects start from $3,000 and take 2 to 8 weeks. Check what your platform already includes first.
Is an AI receptionist better than a live answering service?
It depends on the work. An AI receptionist is usually cheaper: an October 2026 roundup by an AI receptionist vendor puts it at roughly $150 to $550 a month at 200 calls, against about $777 to $1,965 for a live service. It can also book straight into your schedule when connected to your software. A live service handles messy or emotional calls better. Many HVAC and plumbing shops use AI for routine bookings and send emergencies and exceptions to a person.
Does it work with ServiceTitan, Housecall Pro or Jobber?
All three sell their own AI answering. ServiceTitan's Voice Agent books into the platform using configured job types and availability and bills per handled call; Carly, an AI receptionist vendor, reports $2.75 a call. Housecall Pro's CSR AI answers calls and reports jobs booked during and after hours, with no published price. Jobber's AI Receptionist is a $29 a month add-on that includes 30 conversations, then $0.79 each, and it is included with unlimited use on the Plus plan. A custom build only makes sense where these fall short.
Will customers know they are talking to AI, and will it annoy them?
They should know. Say so in the greeting, for example: 'I'm the company's automated assistant.' Annoyance usually comes from the script, not the AI: owners on Jobber's community forum report callers getting frustrated when the receptionist asked form questions instead of finding out what was wrong. Keep the questions short, let callers ask for a person, and listen to real calls in the first weeks.
What counts as an emergency call?
You decide, and you write it down before the pilot. Common examples: gas smell or a CO alarm (tell the caller to leave and call 911 or the gas utility first), no heat in freezing weather, a burst pipe or active leak, sewage backing up, and burning smells or sparking from electrical equipment. Everything else can usually wait for a booked slot.
- See How Much Missed Sales Calls Cost Home Services Businesses (Invoca, May 2024)
- AI Voice Agent overview (ServiceTitan)
- AI Voice Agent for Basic Phones and Phones Pro: FAQ (ServiceTitan Help Center, 2026)
- Configure your Voice Agent Settings in ServiceTitan (ServiceTitan Help Center, 2026)
- Manage job types and dispatch fees for Voice Agent calls (ServiceTitan Help Center, 2026)
- CSR AI Overview (Housecall Pro Help Center, 2026)
- Jobber pricing and add-ons (Jobber)
- Receptionist, powered by Jobber AI (Jobber Help Center, 2026)
- Jobber AI Receptionist: Pricing, Review and Alternatives (Carly, an AI receptionist vendor, October 2026; cites Jobber community forum feedback)
- HVAC Answering Service: Options and Costs (Carly, an AI receptionist vendor, October 2026; source of the ServiceTitan $2.75 figure and the cost ranges)
