Speed to lead statistics: response time data, sourced

By Parvez Zoha, founder and CEO of Novacall AI · Published November 1, 2026 · Updated November 1, 2026 · Editorial policy

Speed to lead is how long a business takes to reply to a new inquiry, and the research agrees that the first minutes matter most. In the InsideSales.com and MIT study, the odds of qualifying a lead fell 21 times when the first call came at 30 minutes instead of 5.

Below is every speed-to-lead figure this site uses, with its source, year, sample and the source’s own wording. They are industry benchmarks, not Novacall AI results.

Industry benchmarks, not Novacall AI results. Every figure was checked against its source on November 1, 2026.

Key speed-to-lead statistics

Leads called within 60 seconds converted 391% above average (Velocify, formerly Leads360). This is an industry benchmark, not a Novacall AI customer result. (Leads360 white paper)
Leads first called 1 to 2 minutes after the inquiry converted 160% more often than the average lead (Leads360).
Firms that tried to contact a lead within an hour were nearly seven times as likely to qualify it as firms that tried an hour later (Harvard Business Review, 2011).
Of 2,241 U.S. companies sent a web lead, 37% replied within an hour and 23% never replied (Harvard Business Review, 2011).
The odds of reaching a lead fell 100 times when the first call came at 30 minutes instead of 5 (InsideSales.com and MIT, 2007).
A person answered 56% of calls to businesses, across 70 million calls in 10 industries (Invoca, 2026).
40% of law firms answered a secret-shopper phone call in 2024, down from 56% in 2019 (Clio Legal Trends Report 2024, via 2Civility).

Every statistic, with its source and wording

Speed-to-lead and lead-response statistics. Every figure last checked against its source on November 1, 2026.
Statistic	Source	Year	Sample	Wording in the source
Leads called within 60 seconds converted 391% above average (Velocify, formerly Leads360).	Leads360 (now Velocify), Beyond Qualification: The impact of speed on lead conversion rates	Undated white paper (file created 2010)	Several million internet-generated leads	The executive summary gives this as the improvement from responding to leads within 1 minute. This is an industry benchmark, not a Novacall AI customer result.
Leads first called 1 to 2 minutes after the inquiry converted 160% more often than the average lead.	Leads360 (now Velocify), Beyond Qualification: The impact of speed on lead conversion rates	Undated white paper (file created 2010)	Several million internet-generated leads	“Leads called between 60 and 120 seconds after they were generated converted 160% more often than the average.”
Leads first called within 3 minutes converted 98% above the average lead.	Leads360 (now Velocify), Beyond Qualification: The impact of speed on lead conversion rates	Undated white paper (file created 2010)	Several million internet-generated leads	Chart label: “+98% Leads called in under 3 minutes.”
Calling within 30 minutes raised conversion 62% above the average.	Leads360 (now Velocify), Beyond Qualification: The impact of speed on lead conversion rates	Undated white paper (file created 2010)	Several million internet-generated leads	“calling within the first 30 minutes was found to increase conversion rates by an average of 62%”
Calling within 1 hour raised conversion 36% above the average.	Leads360 (now Velocify), Beyond Qualification: The impact of speed on lead conversion rates	Undated white paper (file created 2010)	Several million internet-generated leads	“calling within 1 hour was found to improve conversion by an average of 36%”
Leads called within 24 hours were 17% more likely to convert.	Leads360 (now Velocify), Beyond Qualification: The impact of speed on lead conversion rates	Undated white paper (file created 2010)	Several million internet-generated leads	“leads called within 24 hours are still 17% more likely to convert than those that are not”
88% of leads that eventually converted had been called within the first 24 hours.	Leads360 (now Velocify), Beyond Qualification: The impact of speed on lead conversion rates	Undated white paper (file created 2010)	Several million internet-generated leads	“88% of all leads that eventually convert were called within the first 24 hours.”
Firms that tried to contact a lead within an hour were nearly seven times as likely to qualify it as firms that tried an hour later.	James B. Oldroyd, Kristina McElheran and David Elkington, “The Short Life of Online Sales Leads,” Harvard Business Review; wording checked in SmartCompany, July 2011	2011 (March issue)	1.25 million sales leads received by 29 B2C and 13 B2B U.S. companies	“Firms that tried to contact potential customers within an hour of receiving a query were nearly seven times as likely to qualify the lead (which we defined as having a meaningful conversation with a key decision maker) as those that tried to contact the customer even an hour later”
Firms that tried within an hour were more than 60 times as likely to qualify the lead as firms that waited 24 hours or longer.	James B. Oldroyd, Kristina McElheran and David Elkington, “The Short Life of Online Sales Leads,” Harvard Business Review; wording checked in SmartCompany, July 2011	2011 (March issue)	1.25 million sales leads received by 29 B2C and 13 B2B U.S. companies	“and more than 60 times as likely as companies that waited 24 hours or longer”
Of 2,241 U.S. companies sent a web lead, 37% replied within an hour, 16% within 1 to 24 hours, 24% after more than 24 hours, and 23% never replied.	James B. Oldroyd, Kristina McElheran and David Elkington, “The Short Life of Online Sales Leads,” Harvard Business Review; wording checked in SmartCompany, July 2011	2011 (March issue)	2,241 U.S. companies, each sent one web-generated test lead	“Although 37% responded to the lead within an hour, and 16% responded within one to 24 hours, 24% took more than 24 hours — and 23% of the companies never responded at all”
Among companies that replied within 30 days, the average first response took 42 hours.	James B. Oldroyd, Kristina McElheran and David Elkington, “The Short Life of Online Sales Leads,” Harvard Business Review; wording checked in SmartCompany, July 2011	2011 (March issue)	2,241 U.S. companies, each sent one web-generated test lead	“The average response time, among companies that responded within 30 days, was 42 hours.”
The odds of reaching a lead fell 100 times when the first call came at 30 minutes instead of 5.	InsideSales.com and James Oldroyd, PhD (MIT Sloan), Lead Response Management Study summary, presented at MarketingSherpa’s B2B Demand Generation Summit	2007	Three years of data from six companies: more than 15,000 web leads and 100,000 call attempts	“The odds of contacting a lead if called in 5 minutes versus 30 minutes drop 100 times.”
The odds of qualifying a lead fell 21 times when the first call came at 30 minutes instead of 5.	InsideSales.com and James Oldroyd, PhD (MIT Sloan), Lead Response Management Study summary, presented at MarketingSherpa’s B2B Demand Generation Summit	2007	Three years of data from six companies: more than 15,000 web leads and 100,000 call attempts	“The odds of qualifying a lead if called in 5 minutes versus 30 minutes drop 21 times.”
In the first hour, the odds of reaching a lead fell more than 10 times and the odds of qualifying it more than 6 times.	InsideSales.com and James Oldroyd, PhD (MIT Sloan), Lead Response Management Study summary, presented at MarketingSherpa’s B2B Demand Generation Summit	2007	Three years of data from six companies: more than 15,000 web leads and 100,000 call attempts	“The odds of calling to contact a lead decrease by over 10 times in the 1st hour. The odds of calling to qualify a lead decrease by over 6 times in the 1st hour.”
A person answered 56% of calls to businesses, and 65% of calls longer than 15 seconds.	Invoca, Lead Conversion Benchmarks Report 2026	July 2026	70 million calls to Invoca customers in 10 industries	“Across all industries, 56% of calls to businesses are answered by a person.” For calls longer than 15 seconds, “the answer rate climbs to 65%.”
52% of callers to home services businesses spoke with a person.	Invoca, Home Services Lead Conversion Benchmarks Report 2026	July 2026	Calls to Invoca’s home services customers	“52% of callers to home services businesses speak with a person”
A person answered 54% of calls to healthcare businesses.	Invoca, Healthcare Lead Conversion Benchmarks Report 2026	July 2026	Calls to Invoca’s healthcare customers	“Across healthcare, 54% of calls are answered by a person.”
Missed-call rates: healthcare 32%, legal 28%, home services 14%.	CallRail, From Conversations to Conversions	January 2025	1.1 million leads at CallRail customers in seven industries; missed calls reported for four	“Healthcare has the highest missed call rate at 32%, followed by Legal at 28%, Home Services at 14%, and Real Estate at 9%.”
40% of law firms answered a secret-shopper phone call in 2024, down from 56% in 2019; 33% replied to emails, down from 40%.	Clio, Legal Trends Report 2024, as reported by 2Civility (Illinois Supreme Court Commission on Professionalism)	October 2024	Secret-shopper calls and emails to U.S. law firms	“Only 40% of firms answered the phone calls (down from 56% in 2019).” “Just 33% of firms responded to the emails (down from 40% in 2019).”
14% of 824 New Jersey dental practices could not be reached after two attempts.	New Jersey Health Care Quality Institute	January 2025	All 824 general and pediatric dental practices in five Medicaid plan directories	“14% of the practices were unreachable, with no answer after two attempts.”

How response time changes conversion

The Leads360 study compared the conversion rate of leads by how soon they were first called with the average across all leads. The gain is largest in the first two minutes and shrinks with every hour after:

Within 1 minute: Leads called within 60 seconds converted 391% above average (Velocify, formerly Leads360). (Leads360)
1 to 2 minutes: 160% above the average lead (Leads360).
Within 3 minutes: 98% above the average (Leads360).
Within 30 minutes: 62% above the average (Leads360).
Within 1 hour: 36% above the average (Leads360).
Within 24 hours: 17% more likely to convert (Leads360).

The InsideSales.com and MIT Lead Response Management study points the same way. The odds of reaching a lead fell more than 10 times in the first hour, and from 5 to 30 minutes the odds of reaching a lead dropped 100 times and the odds of qualifying it 21 times. After 20 hours, every additional call attempt made it less likely to reach and qualify the lead (study summary).

Harvard Business Review’s research, across 1.25 million leads at 42 U.S. companies, found that firms trying to reach a lead within an hour were nearly seven times as likely to qualify it as firms that tried an hour later, and more than 60 times as likely as firms that waited a day or longer (HBR, 2011).

How fast businesses actually reply

When the Harvard Business Review authors sent a web-generated test lead to 2,241 U.S. companies, 37% replied within an hour, 16% within 1 to 24 hours and 24% after more than 24 hours, while 23% never replied. Among the companies that replied within 30 days, the average first response took 42 hours (HBR, 2011; wording checked in SmartCompany).

Law firms are slower to pick up than they were. In Clio’s 2024 secret-shopper test, 40% of law firms answered the phone, down from 56% in 2019, and 33% replied to emails, down from 40% (Clio Legal Trends Report 2024, via 2Civility).

Dental offices can be hard to reach too. When the New Jersey Health Care Quality Institute called all 824 general and pediatric dental practices in five Medicaid plan directories, 14% could not be reached after two attempts (NJHCQI, January 2025).

How many calls reach a person

Across 70 million calls to its customers in 10 industries, Invoca found that a person answered 56% of calls to businesses, rising to 65% for calls longer than 15 seconds (Invoca, July 2026). The rate was 52% in home services (Invoca home services report) and 54% in healthcare (Invoca healthcare report).

CallRail’s analysis of 1.1 million leads put the missed-call rate at 32% for healthcare, 28% for legal and 14% for home services (CallRail, January 2025). Each vendor counts an answered or missed call in its own way, so compare a figure only with its own source.

How to read these numbers

Leads360 measured several million internet-generated leads at consumer-facing businesses with a consultative sale. Its figures compare conversion with the average lead, not with a lead that was never called.
The InsideSales.com and MIT study covered six companies, more than 15,000 web leads and more than 100,000 call attempts over three years. It measured contact and qualification, not closed sales.
Harvard Business Review’s audit sent one web-generated test lead to each of 2,241 U.S. companies. Its qualification finding came from a separate set of 1.25 million leads at 42 companies.
Invoca and CallRail report on their own customers’ calls, and the Clio and New Jersey figures come from secret-shopper studies. Each defines a reached or missed call in its own way.
These are correlations in other companies’ data. They show the direction, not what any one business will see, and none of them is a Novacall AI result.

Figures left out, and why

Some speed-to-lead numbers are repeated widely but could not be traced to a primary source, or are misquoted. This page does not use them:

The claim that most buyers choose the first company to respond, usually given with a precise share and no traceable study behind it.
The claim that up to half of sales go to the vendor that responds first, which circulates without a primary source.
The claim that leads called within five minutes are 100 times more likely to convert. The InsideSales.com and MIT study measured the odds of reaching a lead, not of converting it.
The Leads360 benchmark credited to Harvard Business Review. It comes from Leads360, now Velocify.

How to measure your own speed to lead

Export a month of leads with two timestamps: when the inquiry arrived and when the first reply went out.
Subtract to get each lead’s response time, and report the median, not the average. One lead left over a weekend can hide how fast the rest were answered.
Split the result by lead source, by hour of day, and by business hours versus evenings and weekends. After-hours leads are worth checking first.
For each response-time band (under 5 minutes, 5 to 30 minutes, 30 to 60 minutes, later), count how many leads were reached and how many booked.
Compare the bands with each other. Then put your own numbers into the speed-to-lead calculator for an illustrative estimate based on the Leads360 benchmark.

Method and sources

Each figure was taken from its primary source where that source is publicly readable: the Leads360 white paper, the Lead Response Management study summary, Invoca’s 2026 benchmark reports, CallRail’s January 2025 report and the New Jersey Health Care Quality Institute release. The Harvard Business Review article is behind a paywall and Clio’s press page blocks automated access, so those figures were checked against secondary sources that quote them: SmartCompany (July 2011) for the HBR article, and 2Civility, the Illinois Supreme Court Commission on Professionalism (November 2024), for Clio’s report. Both are linked in the table.

Every figure was last checked on November 1, 2026. The wording column quotes the source, or the secondary source named beside it. To report an error, email legal@novacallai.com; corrections follow the editorial policy.

Speed-to-lead questions

What is a good speed to lead?

Under five minutes, and under one minute where you can. In the InsideSales.com and MIT study, the odds of qualifying a lead fell four times between 5 and 10 minutes, and 21 times between 5 and 30 minutes.

What is the average lead response time?

In Harvard Business Review’s audit of 2,241 U.S. companies, the average first response among companies that replied within 30 days was 42 hours, and nearly a quarter of the companies never replied at all.

Where does the Leads360 speed-to-lead statistic come from?

Leads called within 60 seconds converted 391% above average (Velocify, formerly Leads360). It comes from a Leads360 white paper based on several million internet-generated leads, and it is often wrongly credited to Harvard Business Review. This is an industry benchmark, not a Novacall AI customer result.

Are these Novacall AI results?

No. Every figure on this page is third-party industry research or a vendor benchmark, credited to its source. None of them is a Novacall AI customer result.

How do I measure my own speed to lead?

Export a month of leads with the inquiry time and the first reply time, take the median gap, and split it by lead source and hour of day. Then compare how many leads were reached and booked in each response-time band.