Lead response time statistics: what the studies really say

October 02, 2026

The most quoted lead response time statistics come from two sources: a March 2011 Harvard Business Review article and a 2007 phone study by James Oldroyd and InsideSales.com. The HBR authors found that firms that tried to contact a web lead within an hour were nearly seven times as likely to qualify it as firms that tried an hour later, and the 2007 study found the odds of reaching a lead by phone dropped 100 times between five and 30 minutes. Several other popular figures, including “78% buy from the first company to respond”, have no source we could find.

The short version

We opened every source below on 2 October 2026.

37% of companies replied to a web lead within an hour. 23% never replied. The average, among those that replied within 30 days, was 42 hours. Sample: 2,241 US companies. (Harvard Business Review, March 2011)
Nearly seven times as likely to qualify the lead. That compares firms that tried within an hour with firms that tried an hour later. Against firms that waited 24 hours or longer, the gap was more than 60 times. Sample: 1.25 million leads at 42 US companies. (Same HBR article.)
100 times lower odds of contact. Calling a web lead after 30 minutes instead of five cut the odds of reaching them by 100 times, and of qualifying them by 21 times. Sample: over 15,000 leads at six companies. (Lead Response Management Study, 2007)
391% better conversion when called within a minute. This is a vendor figure from Velocify, based on its own clients’ leads in 2012.
No source found: “78% of customers buy from the first company to respond” and “35 to 50% of sales go to the vendor that responds first”.

The 2011 HBR study

“The short life of online sales leads” by James B. Oldroyd, Kristina McElheran and David Elkington appeared in Harvard Business Review in March 2011. The HBR page is partly paywalled, so we checked the figures against a reprint of the full text. The article reports two separate pieces of research, and many roundups blend them.

The audit of 2,241 companies

The authors sent a web-generated test lead to 2,241 US companies and timed each reply. 37% responded within an hour, 16% within one to 24 hours, 24% took more than 24 hours and 23% never responded. Among companies that responded within 30 days, the average response time was 42 hours.

The “47% did not respond within 24 hours” you see elsewhere is a fair sum of the last two groups.

The 1.25 million leads

The second dataset covers 1.25 million sales leads received by 29 B2C and 13 B2B companies in the US. Firms that tried to contact a potential customer within an hour of the query were “nearly seven times as likely to qualify the lead” as firms that tried an hour later, and “more than 60 times as likely” as firms that waited 24 hours or longer.

Three details matter when you quote it:

The outcome is qualifying, which the authors define as a real conversation with someone who can make the decision. It does not measure closed sales.
The clock measures when the firm first tried to make contact.
The article never mentions five minutes or “100 times”. Those figures come from the 2007 study below.

The 2007 Lead Response Management study

The five-minute figures come from a study presented on 16 October 2007 at MarketingSherpa’s B2B Demand Generation Summit by Dave Elkington, CEO of InsideSales.com, and James Oldroyd, credited as a faculty fellow at MIT. The study’s own website summarises it.

It examined three years of data from six companies: over 15,000 leads captured through web forms and over 100,000 call attempts, all drawn from the InsideSales.com system. The headline finding is that the odds of contacting a lead drop by 100 times when the first call comes at 30 minutes instead of five. Over the same gap, the odds of qualifying a lead drop 21 times. The odds of contact fall by more than 10 times within the first hour.

“Contact” means a call that connects with a live person for a set number of seconds. “Qualify” means the lead is willing to enter the sales process.

Before you quote it, know four things:

HBR did not publish it. People call it the “MIT study” because of Dr Oldroyd’s affiliation. The data and the co-presenter came from a software vendor.
Forbes did not research it. The Forbes credit points to a July 2012 contributor article by Ken Krogue, co-founder of InsideSales.com, which repeats the study’s figures.
The 100 is about reaching someone by phone. One roundup says leads are 100 times more likely to qualify. The study’s figure for qualifying is 21.
It is phone data from 2007 or earlier. Six companies, web forms, outbound calls.

Later vendor reports

Each report below comes from a company that sells sales or marketing software. Check the sample before you repeat the number.

Report	Sample	What it reports
Velocify, “The ultimate contact strategy” (leads from the first half of 2012)	Nearly 3.5 million leads from more than 400 Velocify clients	Calling within one minute: 391% improvement in conversion rate. Two minutes: 160%. One hour: 36%. The copy we opened does not state the baseline.
Drift, 2017	Lead forms sent to 433 B2B software companies	7% responded within five minutes. 55% had not responded after five business days.
InsideSales, 2021	5.7 million inbound leads at more than 400 companies	Conversion rates eight times greater in the first five minutes. 57.1% of first call attempts came after more than a week.
RevenueHero, March 2024	Demo requests sent to 1,000 B2B software companies	63.5% never responded. Among those that did, the average was 1 day, 5 hours and 17 minutes.

Statistics with no traceable source

We tried to trace each of these to a study with a sample and a year. We could not.

“78% of customers buy from the first company to respond.” Usually credited to a “Lead Connect survey”. Vendasta links it to a LeanData article that does not contain the figure. Verse links to another LeanData article, which does not contain it either. Chili Piper states it with no source. Casey Response credits it to the 2007 study, where it does not appear. We found no survey report.
“35 to 50% of sales go to the vendor that responds first.” Credited to InsideSales.com as far back as a 2013 blog post, with no link. It is not in the 2007 study, the 2012 Forbes article or InsideSales’s current response-time page.
“An 80% drop in lead quality after five minutes.” The same Casey Response page credits it to HBR’s 2011 article. The HBR article does not mention five minutes.

The 391% figure does trace, to Velocify’s study. It describes phone calls to one vendor’s clients’ leads, so quote it with that context.

If you want to see where leads slip in your own process, the 2-minute Leak Score quiz gives you a score and the first thing to fix.

What this means for WhatsApp leads

Every study above measured web forms answered by phone or email, mostly at US companies. We searched for a published study of response time to WhatsApp leads and found none as of 2 October 2026. If someone quotes a WhatsApp figure, ask for the sample.

What you can take from the research is direction. In both main studies, delay reduced the chance of a real conversation. A person who has just messaged you on WhatsApp still has the chat open, so expect the same direction. We found no published figure for its size.

Two WhatsApp details add to the case for speed:

The 24-hour window. On the WhatsApp Business Platform, Meta’s documentation says a 24-hour customer service window opens when a person messages you. After it closes, you can only send pre-approved template messages (checked 2 October 2026). Our guide to the WhatsApp 24-hour rule explains the details.
Who sees the chat. If one phone holds the number, reply time depends on one person. See how several agents can share one WhatsApp number, and how to follow up click-to-WhatsApp ad leads.

How to measure your own response time

Your own numbers tell you more than a 2007 phone study can.

Define it. Response time is the gap between the lead’s first message and the first reply from a person. Record automatic replies separately.
Take a sample. Use your last 50 leads, or every lead from the last 30 days.
Record two timestamps per lead. First message in, first human reply out. Add the channel and the rep.
Use the median. One lead answered after four days distorts an average.
Count three groups. Replied within five minutes, within an hour, and never.
Split by time of day. Working hours and outside working hours behave differently.
Compare outcomes. Of the leads answered within an hour, how many reached your next stage? Compare that with the rest.

Say Kite Travel received 60 WhatsApp enquiries in September. Amaka lists them and finds a median reply time of 47 minutes in working hours and 11 hours for messages after 18:00. The evening gap is the first thing to fix.

A CRM records both timestamps for you. Socianet, for instance, sends new leads an automatic first reply in about 5 seconds on WhatsApp, SMS or email, and reports activity per rep. While your volume is low, a spreadsheet does the job. Next, look at how many times you follow up.

Frequently asked questions

What did Harvard Business Review say about lead response time?

In March 2011, HBR published an audit of 2,241 US companies: 37% responded to a web lead within an hour and 23% never responded. A second dataset of 1.25 million leads showed that firms trying within an hour were nearly seven times as likely to qualify the lead as firms that tried an hour later.

What is the MIT lead response time study?

It is the 2007 Lead Response Management Study by James Oldroyd, credited as a faculty fellow at MIT, and InsideSales.com. It analysed over 15,000 web leads and 100,000 call attempts at six companies. It is a vendor study of phone calls, and HBR did not publish it.

What is a good lead response time?

No study sets a standard. HBR’s threshold was one hour and the 2007 phone study’s was five minutes. A practical target (our suggestion) is an automatic acknowledgement within seconds and a reply from a person within five minutes in working hours.

What is the 5-minute rule for lead response?

It is shorthand for the 2007 finding that the odds of reaching a web lead by phone were 100 times lower at 30 minutes than at five. The odds of qualifying were 21 times lower. It describes phone contact, so treat it as a guide for other channels.

Do these studies apply to WhatsApp?

Not directly. They measured web forms followed by phone calls or email, and we found no published study of WhatsApp response time. The direction is likely to hold. The size of the effect is unknown, so measure your own.

Plan the first hour before the next lead arrives

The First-Hour Follow-Up Kit gives you scripts for the first hour after a lead comes in, plus a 7-day rhythm for what follows. It is one of the free tools on the Socianet site.

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Sources

Patrick Nwafor

Patrick Nwafor is Chief Marketing Officer at Socianet, the CRM for growing sales teams. He has worked on lead generation, event registration and digital campaigns since 2016, for organisations including Africa’s Young Entrepreneurs, Dr Clear Aligners UK and the Inshort Film Festival.

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