Provenance
Where the five-minute rule actually comes from
Two studies, four years apart, routinely merged into one and attributed to the wrong publisher.
The claim, as it circulates: “Respond to an online lead within five minutes and you are far more likely to make contact and to qualify it”
The five-minute odds come from Dr James Oldroyd's Lead Response Management study, run with InsideSales.com and associated with MIT, published in 2007. They are not from Harvard Business Review. HBR published a separate study in March 2011, and that is where the 42-hour average and the qualification odds by hour come from.
The trail
| Step | Publisher | Kind | Attributes it to | Status |
|---|---|---|---|---|
| 01 | Vendor and agency content, ongoing | Vendor marketing | usually Harvard Business Review, sometimes nobody | |
| 02 | Aggregator statistics pages | Aggregator | a mix of HBR, MIT and InsideSales, frequently in the same sentence | |
| 03 | Oldroyd, McElheran and Elkington, Harvard Business Review | Academic | its own audit of US firms, plus a separate analysis of inbound leads | |
| 04 | Oldroyd, Lead Response Management study, MIT and InsideSales.com | Academic | its own dataset of tracked inbound leads | Primary source |
01 · Vendor and agency content, ongoing — undated. “Speed to Lead: Why the First 5 Minutes Make or Break Your Sale”
02 · Aggregator statistics pages — undated. “Lead Response Time Statistics (2026): The 5-Minute Rule”
03 · Oldroyd, McElheran and Elkington, Harvard Business Review — 2011-03-01. “The Short Life of Online Sales Leads”
04 · Oldroyd, Lead Response Management study, MIT and InsideSales.com — undated. “Lead Response Management Study”
How it appears in circulation
| As published | Where | What changed | Observed |
|---|---|---|---|
| 100x more likely to connect, 21x more likely to qualify | Attributed to Harvard Business Review across vendor and agency content | Attribution moves from Oldroyd's MIT and InsideSales study to Harvard Business Review, which published a different study four years later with different figures. | 2026-08-08 |
| 42 hours | Restated widely as a current median response time | The basis changes. It is a mean from the Harvard Business Review audit and is requoted as a median, which describes a different firm and hides the tail entirely. | 2026-08-08 |
| 47 hours | Restated as the average B2B lead response time | The value itself moves, with no new measurement identified and no basis stated for the change from the figure it appears to descend from. | 2026-08-08 |
What the evidence supports
- That responding faster to an inbound web enquiry raises the odds of reaching a person, measured on tracked inbound leads by Oldroyd with InsideSales.
- That firms in the Harvard Business Review audit were, on average, slow to answer an ordinary web enquiry, and that a large share never answered at all.
What it does not support
- That Harvard Business Review measured the five-minute effect. It did not; a separate study four years earlier did, and it measured contact rather than qualification.
- That the 42-hour figure is a median, or that it describes response times in any year after the audit was run.
- That the effect has been re-measured recently. No current primary measurement of US firm response latency was located during this trace.
Two separate pieces of research sit underneath every speed-to-lead claim in circulation, and almost nothing that quotes them keeps them apart. The first is Oldroyd's Lead Response Management study, run with InsideSales.com and associated with MIT, which measured how the odds of reaching and qualifying an inbound lead changed with response delay. The second is the Harvard Business Review audit published in March 2011, which sent an ordinary web enquiry to a large set of US firms and measured how long they took to answer, alongside an analysis of a much larger set of inbound leads. Different authors overlap between them, which is probably how the merge started.
The merge matters because the two studies answer different questions. The five-minute finding is about contact, not conversion, and it is a statement about odds rather than about outcomes. The Harvard Business Review audit is about how a population of firms behaves, and its headline number is an average across that population. Quoting the first as Harvard research and the second as a median produces a sentence that sounds more authoritative than either study and describes neither.
The 42-hour figure is the one worth watching, because its basis drifts rather than its value. A mean and a median say different things about a distribution whose whole problem is its tail: the enquiry that arrives on a Friday evening, the form routing to an unwatched mailbox, the channel nobody monitors. An average is designed to absorb those. Reporting it as a median implies that half of firms answered inside 42 hours, which the audit does not establish and which a reader building a case for their own team would reasonably act on.
The practical consequence for anyone about to cite this: both findings are real and both are old. Neither has been re-measured on a current lead population as far as this trace could establish. If a current figure matters to a decision you are about to make, the honest options are to cite the original studies with their dates attached, or to measure your own response times, which takes an afternoon and produces a number that is actually about your business.
What we could not establish
- The sample size of the original Lead Response Management study is reported inconsistently across restatements, and we have not confirmed a figure against the study itself.
- Whether either study has been replicated on a modern lead population, including channels that did not exist when they ran.
Listed rather than omitted. A trail that reports only what it settled is a trail whose gaps a reader has to find for themselves.
METHOD
Every figure below carries its source and the date it was verified. Nothing on this page is asserted.
The numbers on this page.
| What | Value | Specific to |
|---|---|---|
| Odds of making contact — replying within 5 minutes vs within 30 | 100× | This page |
| Average B2B first-response time | 42 hours | This page |
| US firms sent a test web enquiry in the HBR lead-response study | 2,241 | This page |
| Inbound leads analysed in the HBR lead-response study | 1.25 million | Category-wide |
| Firms that never responded to a web enquiry at all | 23% | Category-wide |
Oldroyd, J. B. — MIT / InsideSales.com Lead Response Management Study (2007) · the original five-minute finding; contact, not qualification · verified
Oldroyd, McElheran & Elkington, "The Short Life of Online Sales Leads", Harvard Business Review (March 2011) · 1.25M inbound leads across 2,241 US firms · verified
Start with the measurement.
Reading about a benchmark is not the same as knowing your own number. The audit produces yours, measured rather than estimated.
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