Short answer: a missed call costs you roughly the number of calls you miss each month, multiplied by the share that would have turned into work, multiplied by your average job value. You won't find a reliable industry-wide figure for this, so the honest move is to work out your own number from your own call log. The fix is rarely "answer every call". It's making sure every missed call and after-hours enquiry gets a quick, useful reply and a follow-up.
The rest of this guide shows you how to estimate the cost for your business, why missed calls hurt more than they look, and the options for fixing it, from free habits to automation.
Why do missed calls matter so much for service businesses?
For most service businesses, the phone call or web enquiry is the moment someone decides who they'll book. A plumber, physio, electrician, cleaner, accountant or salon is usually being compared with a few others at the same time.
When a call rings out, the caller rarely waits. They go back to the search results and try the next name. You often won't know it happened: many people don't leave a voicemail, and a missed call from an unknown number is easy to ignore at the end of a long day.
Missed calls also bunch up at the worst times. You're on a job, with a client, driving between sites, or closed for the night. That's exactly when a new customer has time to search.
How do I work out what missed calls cost my business?
You can get a useful estimate in about half an hour. You need three numbers.
- Missed calls and unanswered enquiries per month. Check your phone's call history or your phone provider's portal, and count the calls you didn't answer and didn't return the same day. Add web forms, Facebook and Instagram messages and emails that waited more than a few hours.
- The share that would have become paying work. Look at the calls you did answer last month. Of the genuine new enquiries, how many booked? That's your conversion rate. Use the same rate for missed calls, or a lower one if you want to be conservative.
- Your average job or customer value. Use the average invoice, or the value of a typical customer over a year if people come back.
Then multiply them:
Missed enquiries per month × conversion rate × average job value = estimated monthly cost
A worked example
Here's an illustrative example, not real client data. Say a local trades business misses 20 genuine enquiries a month, usually books about 1 in 4 of the enquiries it answers, and has an average job value of $450.
20 × 0.25 × $450 = $2,250 a month in work that probably went elsewhere.
Plug in your own numbers. Even if your result is a fraction of this, it's usually more than the cost of fixing the gap.
What the simple formula leaves out
The formula only counts the first job. It doesn't include repeat work, referrals, or reviews the customer might have left. It also ignores the cost of time: chasing voicemails and returning calls late takes longer than answering an enquiry while it's fresh.
Which missed calls are you most likely to lose?
Not every missed call is a lost customer. Existing clients will usually call back. The ones most at risk are:
- New enquiries from search. They have other options one tap away.
- After-hours calls. Evenings and weekends are when many people get around to booking.
- Urgent jobs. Someone with a burst pipe or a broken lock wants an answer now.
- Web forms and DMs. These feel less urgent to the business, but the person sending them is often waiting.
If you only fix one thing, fix the reply to new enquiries outside business hours.
How can I stop losing leads from missed calls?
There are several fixes, from free to fully automated. Most businesses combine two or three.
1. Set a call-back rule
Decide on a clear rule, such as "every missed call gets a call or text back within 30 minutes during business hours", and make one person responsible for it. It costs nothing, and it often catches enquiries that would otherwise slip.
2. Use a missed-call text
Many phone systems and apps can send an automatic SMS when you miss a call, for example: "Sorry we missed you. We're on a job. Reply with what you need and we'll call you back today." It tells the caller they've been noticed and gives them a reason to wait.
3. Fix your voicemail and hours
Record a short voicemail that says when you'll call back and how to book online. Keep your opening hours accurate on your website and Google Business Profile, so people don't call when nobody can answer.
4. Answer web forms and messages quickly
Treat a web form like a phone call. Turn on notifications, send an instant acknowledgement, and follow up personally. An auto-reply that only says "thanks for your message" is better than nothing, but a reply that asks the next useful question is better again.
5. Add an AI assistant for after-hours enquiries
An AI assistant can reply to missed calls and after-hours enquiries, answer the common questions you've approved, collect the caller's details and pass them to your team with a follow-up. It doesn't replace your staff during the day. It covers the gaps when nobody can pick up.
If you go down this path, set it up carefully. The Office of the Australian Information Commissioner's guidance on using commercially available AI products says public-facing AI tools such as chatbots should be clearly identified as AI, and that your privacy policy should explain how you use AI. Keep the assistant to questions you've approved, and have a person check the leads it captures.
Does follow-up matter as much as the first reply?
Yes. A quick first reply keeps the conversation open, but many enquiries need a second nudge. People get busy, compare quotes, or forget to reply.
A simple follow-up sequence might be a reply within minutes, a check-in the next day, and a final message a few days later. Keep each message short and useful: confirm what they asked for, offer a time, and make it easy to say no.
If those follow-ups promote your services, Australia's spam rules apply. The ACMA's guide to avoiding spam says marketing messages need consent, must identify who is sending them, and must include an easy way to unsubscribe. A reply to someone who has just asked you for a quote is a different situation from a cold marketing message, but it's worth keeping the same habits: say who you are and make it easy to opt out.
What should I track once the fix is in place?
Keep it simple. Each month, note:
- how many calls and enquiries were missed
- how many got a reply within your target time
- how many of those turned into bookings
After two or three months you'll have your own before-and-after numbers, which are far more useful than any industry average.
Frequently asked questions
Is there a reliable average cost of a missed call?
Not one we'd rely on for your business. Job values and conversion rates vary too much between industries and towns. Your own call log and booking rate will give you a far better estimate than a headline figure.
Should I answer every call myself?
Usually not. It's rarely practical when you're on the tools or with a client. A clear call-back rule plus an automatic reply for missed calls covers most of the gap without interrupting the work.
Will an AI assistant sound robotic or say the wrong thing?
It depends on the setup. A good assistant sticks to the answers you've approved, says it's an AI assistant, collects details, and hands anything unusual to a person. It shouldn't promise prices, times or outcomes you haven't signed off.
How quickly should I reply to a new enquiry?
As quickly as you reasonably can, ideally while the person is still looking. Pick a target you can actually keep, such as within 30 minutes during business hours and first thing the next morning for after-hours enquiries, and use an automatic reply to bridge the gap.
Want a hand with this?
SIGNAL sets up AI replies for missed calls and after-hours enquiries, with follow-up, so new leads are less likely to go cold. You approve everything the assistant says. If you'd like to see whether it suits your business, apply here. It takes about two minutes.