Speed to Lead
Speed to Lead: What Response Time Actually Does to Conversion
The research on how fast a business responds to an inbound lead, and what happens to conversion odds as that response gets slower — drawn from published studies, not internal benchmarks.
Executive Summary
The relationship between response speed and conversion isn't a new theory — it's one of the more consistently replicated findings in B2B sales research, and it hasn't changed much in over a decade. A 2011 Harvard Business Review study that tracked 1.25 million sales leads across 42 companies found that contacting a lead within an hour made a company nearly seven times more likely to qualify it than contacting the same lead just one hour later, and more than 60 times more likely than waiting 24 hours. A 2024 follow-up test of 1,000 B2B companies found the underlying behavior largely unchanged: 63.5% never responded to an inbound enquiry at all, and the ones that did took over a day on average.
The gap between what the research shows and what most businesses actually do is the leak this report is about.
The Original Study
The most-cited source in this space is James B. Oldroyd, Kristina McElheran, and David Elkington's 2011 Harvard Business Review study, _"The Short Life of Online Sales Leads."_ The researchers audited response behavior at 2,241 U.S. companies: only 37% responded within an hour, another 16% responded within one to 24 hours, and 23% never responded at all. Among companies that did eventually respond within 30 days, the average response time was 42 hours.
The more striking part of the study looked at outcomes, not just response time. Across 1.25 million leads at 42 companies, firms that attempted contact within one hour of a lead coming in were nearly seven times as likely to qualify that lead — meaning have a meaningful conversation with a real decision-maker — compared to firms that waited just one hour longer. Compared to firms that waited 24 hours or more, the first-hour responders were more than 60 times as likely to qualify the lead.
Has Anything Changed Since 2011?
Not much, based on more recent testing. In a 2024 study, RevenueHero submitted live demo requests to 1,000 B2B SaaS companies and tracked what happened next. The results:
- 63.5% of companies never responded at all
- Among the 36.5% that did respond, the average response time was 1 day, 5 hours, and 17 minutes
- Only 17.2% of all companies tested responded within two minutes
Separately, a 2024–2025 audit of 114 B2B companies by Workato found that over 99% failed to respond within five minutes, with average email responses taking close to 12 hours and phone callbacks averaging over 14 hours. The same audit found one meaningful lever: companies using automated lead-routing cut their average response time to roughly 3.5 hours — about a quarter of the time of companies without routing automation.
Read together, the 2011 and 2024 data describe the same pattern from two different angles: the advantage of responding fast is large and well established, and most businesses still aren't set up to capture it.
Why This Happens
None of this is really about effort. A sales team checking a shared inbox every few hours, a receptionist who's on another call, a form submission that lands after the office has closed — these are structural gaps, not failures of individual attention. The lead doesn't know or care why the delay happened; it only registers that nobody answered yet, and moves on to whichever business does.
What This Means, Not What It Promises
We can't tell you what switching to instant response will do for your specific close rate — that depends on your market, your offer, and what your competitors are doing. What the research above supports is narrower and more defensible: the businesses that respond in minutes convert a meaningfully larger share of the leads they're already paying for than the businesses that respond in hours. Whether that gap is costing your business five figures or fifty is a question for your own lead data — which is what a Revenue Leakage Audit is built to answer.
The Data at a Glance
| Finding | Detail | Source |
|---|---|---|
| Companies responding within 1 hour | 37% (of 2,241 audited) | Oldroyd, McElheran & Elkington, HBR, 2011 |
| Companies that never responded | 23% (2011 study) / 63.5% (2024 study) | HBR 2011; RevenueHero 2024 |
| Qualification odds, contact within 1 hour vs. 1 hour later | ~7x more likely | HBR, 2011 (1.25M leads, 42 companies) |
| Qualification odds, contact within 1 hour vs. 24+ hours | 60x+ more likely | HBR, 2011 |
| Average response time among responders | 1 day, 5 hrs, 17 min | RevenueHero, 2024 |
| Companies failing a 5-minute response test | 99%+ (of 114 tested) | Workato, 2024–25 |
| Response-time cut from automated lead routing | ~4x faster (3.5 hrs vs. ~13 hrs) | Workato, 2024–25 |
Sources
- Oldroyd, J. B., McElheran, K., & Elkington, D. — _The Short Life of Online Sales Leads_, Harvard Business Review (March 2011) — hbr.org
- RevenueHero — _We Tested Lead Response Times of 1,000 B2B Sales Teams_ (2024) — revenuehero.io
- Workato lead-response audit findings, as reported in _Speed to Lead: The B2B Guide to Faster Lead Response_ (2026) — ivristech.com