This guide is for an HVAC shop whose phone rings more than the office can handle in the first heat wave and the first cold snap, and then goes quiet after hours. Every unanswered call is a repair worth $300 to $800 or a replacement worth $8,000 to $14,000 that goes to the next shop in the search results. The fix ranges from an AI answering line at $49 a month to a human answering service priced on quote, and a mid-size shop usually ends up with a mix.
The order matters. Measure the gap first, decide what an answered call has to produce, then buy the cheapest option that does it and connects to your dispatch software.
Count the calls you miss before buying anything
Pull the missed and abandoned call reports from your phone system for the last peak week and for an ordinary week. Split them by business hours, evenings and weekends. Look hardest at the first two weeks of a heat wave and at evenings all year, because overflow and after-hours are the two different problems the options below solve. If your phone system has no reports, a call-tracking number on the main line for 30 days gives you the count. The drawback is that this step delays the fix by a month. It pays for itself because every option below is priced on minutes or call volume, and you cannot size a plan without the number.
Decide what an answered call has to produce
An answering service can do three things, and the price rises with each. It can take a message and text it to you. It can book a call into an open slot on your dispatch board. It can triage an emergency and page the on-call tech. Write down which one you need for business hours and which for after hours. Then check the integrations. The tools on the listing page connect to ServiceTitan, Housecall Pro or Jobber, and a booking that lands on the board without a callback is what turns an answered call into revenue. The trade-off is that booking integrations sit on higher tiers. If message-taking is enough, you can pay far less.
Start with an AI answering line for overflow and after hours
AI answering is now the cheap entry point. Rosie starts at $49 a month for 250 minutes, with ServiceTitan and Housecall Pro integrations on its $299 Growth tier. Smith.ai starts at $97.50 a month, offers a human hybrid tier, and connects to ServiceTitan, Housecall Pro and Jobber, the last through Zapier. Sameday is priced flat at $449 to $789 a month, runs around the clock and books into ServiceTitan. Set the AI to pick up on overflow after a set number of rings and on every call outside office hours. The drawback is caller tolerance. Some homeowners hang up on a machine, and an AI can mishandle an unusual request such as a warranty question, so read the transcripts weekly for the first month.
Use a human answering service where callers expect a person
A no-heat call at midnight in January is the case for a human voice. Answering Service Care is a multi-industry answering service with a dedicated home services and contractor program, priced on quote. Human services bill by the minute or by the call, so the bill climbs in exactly the weeks you are busiest. Give the service a script with your service area, your emergency surcharge and the questions to ask before paging a tech. Ask for the per-minute rate, the minimum monthly commitment and the overage terms. The honest drawback is cost at scale. Per-minute billing grows with volume, so most shops use a human service for after hours and overflow and keep business hours in-house.
Keep your own people on the first ring in business hours
No outside service knows your schedule, your pricing and your repeat customers the way your office does. Keep in-house CSRs as the first line during business hours, set the overflow rule to roll to the AI or the service after three or four rings, and route after-hours calls automatically. Track the booking rate for each layer: in-house, AI and human. If the AI books a lower share of calls than your CSRs, tighten its script or move more volume to the human tier. Review the arrangement each spring before the cooling season. The limit of this setup is management time. Three layers mean three sets of reports, and someone in the office has to own them.
The full list of agencies and tools for this is at HVAC contractors: answer every call.