What does the research actually say about lead response time?
The two most-cited studies on this are both old, and both trace back to one research lineage: a 2007 analysis of roughly 15,000 leads across six companies, run by Dr. James Oldroyd with data from InsideSales.com, and a 2011 Harvard Business Review follow-up analyzing 1.25 million leads across 2,241 companies. Both found the same shape: contact and qualification odds fall sharply as response time grows, and fall fastest in the first hour.
The 2007 study, later summarized as a collaboration with MIT’s Sloan School, where Oldroyd held a faculty fellowship, tracked three years of activity across six companies: more than 15,000 leads and over 100,000 recorded call attempts. Its two headline figures: a company that called a lead within five minutes was roughly 100 times more likely to make contact than one that waited thirty minutes, and about 21 times more likely to actually qualify that lead. The original study write-up is still hosted here.
Harvard Business Review’s 2011 follow-up, “The Short Life of Online Sales Leads” (Oldroyd, McElheran and Elkington), analyzed a far larger set: 1.25 million leads across 2,241 U.S. companies. It found the bigger problem wasn’t really the five-minute window. It was the hour around it. Only 37% of companies responded within an hour at all, 23% never responded, and average response time among the companies that did respond was 42 hours. Firms that called within an hour were about seven times more likely to qualify a lead than those that waited one more hour, and roughly 60 times more likely than firms that waited a full day.
“The lead that sits for six hours isn’t losing to a better pitch. It’s losing to whoever picked up the phone first.”
Both studies are worth reading with their limits in view. Neither is a randomized trial. They’re analyses of real call and CRM data from inbound B2B sales leads specifically, run by or with a company that sells lead-management software, not audited independent research. The underlying data is now roughly two decades old, predating smartphones, SMS-first communication, and chat as a default channel. And a lot of what gets presented online as a “current” statistic on this topic just cites the same 21x and 100x multiples back to this one 2007 dataset rather than re-deriving them, which is worth noticing when a 2026 blog post quotes a twenty-year-old number as this quarter’s finding.
One partial exception: a 2025-2026 vendor benchmark analysis of CRM timestamp data across 939 B2B software companies reports the same order of magnitude from a newer dataset: average response time of 47 hours, only 23% of companies responding inside five minutes, and roughly 2.6× higher close rates for leads contacted inside five minutes versus after 24 hours. See that analysis here. Worth flagging honestly: the exact “21 times more likely to qualify” figure this newer benchmark reports is identical to the 2007 number. That either means the underlying pattern has held remarkably stable for two decades, or means the newer figure was borrowed rather than independently derived. Nothing published settles which, and neither should you assume. What has actually held up across every dataset available, old and new, is the shape of the curve rather than any single exact multiplier: waiting costs you the lead, and the cost compounds hardest in the first hour.


