The real cost of missed calls (and how to calculate yours)

Ask the internet what missed calls cost and you will get confident numbers: 85 percent of callers never call back, US$75 billion lost a year, US$126,000 per business. We traced each figure to its source, and most trails end at a dead link, a contradiction or a study that measured something else. So this guide does two things: it shows the receipts, then gives you a formula for the cost of missed calls that runs on your own inputs instead of borrowed ones.

6 Seven Labs builds AI voice calling agents for Singapore businesses. We answer and make calls for a living, so we see missed-call data from the receiving end across thousands of real production calls, and we would rather show you honest arithmetic than a scary number with no source.

Where do the famous missed-call numbers actually come from?

Mostly from each other. We traced the five most-quoted figures back through their citation chains, and only one ends at a real study: a January 2016 count by 411 Locals, an SEO agency that monitored the phone lines of 85 US businesses for 30 days. The other four end at dead links, contradictory attributions or the wrong metric.

The claim	Where the trail leads	Verdict
85% of callers who cannot reach a business never call back	No primary study anywhere. Attributions contradict each other: pages credit two different answering vendors, Forbes, and a 2021 report that the credited company's own website does not contain.	Folklore. We decline to use it.
62% of calls to small businesses go unanswered	A real page: 411 Locals, January 2016, 85 businesses monitored for 30 days. The 62% only appears if every voicemail counts as unanswered.	Real but weak. Cite with full caveats or not at all.
US businesses lose US$75 billion a year	A May 2018 Forbes column citing a NewVoiceMedia report on customers switching after poor service in general, not missed calls. The original report is now offline. Often credited to Forrester; we found no such Forrester report.	Wrong metric, dead primary.
Missed calls cost US$62,000 to US$126,000 a year	Vendor arithmetic. The US$126,000 chain ends at a dead link (HTTP 404) on an answering vendor's blog. No inputs or methodology published anywhere.	Unsourced. We decline to use it.
80% of callers sent to voicemail leave no message	Earliest trace is a 2014 trade article citing Forbes magazine, with no study named. Verified platform data says the real number is worse.	Folklore. Use Invoca's verified figure instead.

The 85 percent claim is the most repeated and the least real. Every version we checked attributes it somewhere different: two answering vendors, Forbes, or a 2021 report by a company whose own website contains no such report. When attributions contradict each other and no study ever surfaces, the number is folklore, and we would be sceptical of any page that states it as fact.

The 62 percent figure at least has a page you can read. Here is what 411 Locals actually reported from its 85-business sample:

37.8% of calls do get answered, another 37.8% get forwarded to voicemail and 24.3% don't get any response.

Getting to 62 percent requires counting every voicemail as a missed call, and the published figures sum to 99.9 percent. The honest citation is one widely cited 2016 study of 85 businesses, in which about a quarter of calls got no response at all. That is worth knowing. It is not a law of nature.

The US$75 billion figure has a traceable chain, which is more than most. It comes from a Forbes column by Shep Hyken, published 17 May 2018, citing NewVoiceMedia's Serial Switchers report. That report measured customers switching providers after poor service of any kind, not missed calls, and it is offline: the link now redirects to an acquirer's product page. It is also routinely credited to Forrester; we could not locate any Forrester report containing it.

As for the US$62,000 and US$126,000 losses that appear in comparison tables, we found no inputs, no method and no live source for either. One citation chain simply ends at an HTTP 404 on an answering vendor's blog. And the 80 percent voicemail claim traces to a 2014 trade article citing Forbes magazine, no study named. Ironically, the verified number is worse, as the next section shows.

Which missed-call statistics survive scrutiny?

Fewer than you would hope, and none from Singapore. The most useful is Invoca's 2024 platform data from US home services: 27 percent of calls go unanswered, and fewer than 3 percent of callers pushed to voicemail leave a message. Both are the vendor's own numbers, with the sample size undisclosed.

Treat that as platform data, not a peer-reviewed study. The difference between Invoca's figures and the zombie statistics above is that Invoca states what was measured, where and when. Note what the voicemail number implies: sending callers to voicemail is not answering, because 97 in 100 of them will leave you nothing to return.

Hiya's State of the Call 2026, a survey of more than 12,000 consumers across six countries, adds the other half of the problem: 86 percent of calls from unknown numbers go unanswered. Your callback from an unfamiliar office line is, to the customer, an unknown number.

On patience, the best recent figure is British. TCN's 2025 consumer survey (run by Talker Research with 1,000 UK adults in July 2025) put average hold tolerance at 11.6 minutes and found 78 percent of British consumers are very or somewhat likely to abandon a brand after just one poor customer service experience. We cite it as a UK figure, not a Singapore one.

Now the honest gap: as far as we can find, nobody has publicly measured Singapore's missed-call rate. Not a government agency, not a telco, not an industry body. That absence is exactly why the next section matters. Instead of borrowing a US percentage, you can compute the cost from your own phone log in ten minutes.

Response-time statistics suffer the same folklore problem, by the way. The famous 5-minute rule and the 100x claim deserve their own tribunal, and we gave them one in our audit of the speed-to-lead studies.

How do you calculate the cost of your missed calls?

With five inputs you control. The formula is monthly revenue at risk = M × 4.33 × E × C × V. Nobody has published a Singapore missed-call rate, and Invoca's 27 percent covers only US home services, so your own phone log is the single trustworthy source for M, the calls you miss each week.

• M is missed calls a week: rang out, sent to voicemail or arrived outside opening hours. Count it from your phone log. Do not guess.
• 4.33 converts weeks to months (52 weeks divided by 12).
• E is the share of missed calls that are genuinely new enquiries, not existing customers, suppliers or spam.
• C is your conversion rate: of the new enquiries you do answer, the share that book or buy.
• V is the average value of a first transaction.

Here is the dental arithmetic in full, using the inputs from the table below. 10 missed calls a week × 4.33 = 43.3 a month. Times 0.4 (enquiry share), 17.3 lost enquiries. Times 0.5 (booking rate), 8.7 lost bookings. Times S$130 a first visit, about S$1,126 a month, or roughly S$13,500 a year. We carry full decimals through the working, which is why the final figure reads S$1,126 rather than 8.7 × 130.

If a first booking usually becomes a repeat customer, there is a lifetime variant: replace V with V × R, where R is the number of transactions a typical customer makes with you. We report the first-transaction figure in every example below because it is the conservative one.

What do missed calls cost a Singapore business?

Here is the formula applied to three common Singapore businesses, every assumption labelled. The only official prices in the table come from MOH's dental fee benchmarks, updated 28 November 2025: consultation S$21 to S$31, scaling S$35 to S$60, polishing S$26 to S$38, X-ray S$16 to S$33. Everything else is a stated assumption for you to replace.

Scenario	Inputs	Assumptions	Revenue at risk
Dental clinic	M = 10, E = 40%, C = 50%, V = S$130	V uses midpoints of the MOH fee benchmarks for a consultation, scaling, polishing and an X-ray. The ranges are MOH's; the midpoints are ours. M, E and C are illustrative.	About S$1,126 a month; about S$13,500 a year
Aircon servicing	M = 15, E = 60%, C = 40%, V = S$120	No official price benchmark exists for aircon servicing, so V is a neutral assumption. Replace it with your own invoice average.	About S$1,871 a month; about S$22,400 a year
Property agent	M = 5, E = 30%, C = 5%, V = S$11,000	V assumes a 2% commission on a S$550,000 resale; both the rate and the price are illustrative assumptions. CEA confirms commissions are not fixed. Very high variance; read as an expected value.	About S$3,572 a month; about S$42,900 a year

The dental V of S$130 is built from MOH midpoints: S$26 for the consultation, S$47.50 for scaling, S$32 for polishing and S$24.50 for the X-ray. S$26 + S$47.50 + S$32 + S$24.50 = S$130. If your clinic's typical first visit differs, swap in your own figure; the formula does not care where V comes from, only that you can defend it.

The property row needs the most caution. At C = 5 percent, the working is 5 × 4.33 = 21.65 missed calls a month, times 0.3, then times 0.05, which is 0.32 lost transactions: roughly one lost deal every three months, not a steady S$3,572 of monthly cash. And the commission is an assumption, not a rule. CEA states that commissions are not fixed and you are free to negotiate the amount or rate.

The aircon row sits in between: steadier volume than property, higher ticket than a first dental visit, and no official price source at all. 15 × 4.33 = 64.95 missed calls a month, times 0.6, times 0.4, times S$120, gives about S$1,871. If your average job is S$90 or S$180, the answer moves in direct proportion.

What does this formula overstate or miss?

This formula overstates some things and understates others. The biggest overstatement is recovery: some missed callers do reach you later. The biggest understatement is the callback problem. Hiya's 2026 survey of more than 12,000 consumers found 86 percent of calls from unknown numbers go unanswered, and your return call is exactly that: an unknown number.

On recovery, we will not invent a figure. Some callers ring again, WhatsApp you or walk in, and we could not find a single verified study measuring that recovery rate anywhere. So subtract your own estimate from the result, and keep E and C conservative for the same reason. An honest smaller number beats an impressive one you cannot defend.

The understatement runs the other way. The formula counts first transactions only, ignores repeat business unless you apply the V × R variant, and ignores the second-order cost: for many customers an unanswered ring is a first poor experience, and the UK abandonment figure above suggests one of those can end the relationship.

One disambiguation before you quote any of this. In contact-centre metrics, cost per call means total operating cost divided by calls handled. It measures how efficiently a team answers, not what a missed call loses you. The two get blended in vendor tables constantly; keep them apart.

What you do with your number is a separate decision: tighten routing, add staff or answer around the clock. Our plain-English guide to what an AI receptionist is walks through the third option, and if you are weighing people against software for outbound work, we priced both in AI callers vs hiring a telemarketer in Singapore. Prefer to hear it live? Book a 20-minute demo.

Frequently asked questions

How much are missed calls costing your business?

No universal figure exists, and most numbers online trace to dead links or misread studies. Multiply missed calls a week by 4.33, then by your new-enquiry share, your booking rate and your average transaction value. A dental clinic missing 10 calls a week risks about S$1,126 a month on MOH fee benchmark midpoints.

Do missed calls cost money?

Yes, though less than some vendor arithmetic claims. Invoca's US platform data shows 27 percent of home-services calls go unanswered and fewer than 3 percent of voicemail callers leave a message. Hiya found 86 percent of unknown calls go unanswered, and a 2025 UK survey found 78 percent would abandon a brand after one poor experience.

What is the formula for cost per call?

There are two different formulas. In contact-centre metrics, cost per call is total operating cost divided by calls handled, an efficiency measure. The cost of a missed call is different: missed calls a month, times the share that are new enquiries, times your booking rate, times your average transaction value.

How do I stop missing calls?

Measure first: pull one month of phone logs and count calls that rang out, hit voicemail or arrived after hours. Then fix routing for the hours you cover and add answering for the hours you cannot. Our plain-English guide to what an AI receptionist is walks through the 24/7 option.