Speed-to-lead: what does good actually look like?
5 minutes is the widely cited target. The hard benchmark is what firms really do. A 2011 Harvard Business Review audit found a 42-hour average, with 23% never responding at all.
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The short answer
- The 5-minute target comes from research most often credited to MIT and InsideSales.com. Contacting a lead within 5 minutes versus 30 minutes changed contact odds by roughly 100 times and qualification odds by roughly 21 times, across more than 15,000 leads and 100,000 dials.
- A separate 2011 Harvard Business Review audit of 2,241 US firms found the real-world average response time was 42 hours. 23% of firms never responded at all. That is the honest baseline most businesses work from.
- The same Harvard Business Review analysis found firms responding within the first hour were nearly 7 times more likely to qualify the lead than those responding later. A more modest gap than the MIT/InsideSales figures, but still substantial.
- In practice, a good time means you move far faster than the 42-hour average most firms run at. It does not have to mean a perfect 5-minute response on every lead around the clock.
The gap between the target and reality
Two studies get cited together on this topic, and it is worth being precise about which is which. The 5-minute figure, and the roughly 100x contact odds and 21x qualification odds between a 5-minute and 30-minute response, trace to research commonly attributed to MIT and InsideSales.com. It analyzed more than 15,000 leads and over 100,000 dials across six companies. This is the number most often quoted as the target.
A separate and more sobering data point comes from a 2011 Harvard Business Review analysis of 2,241 US firms. It checked how firms really respond, not what a fast reply does for you. It found an average response time of 42 hours, with 23% of firms never responding at all. The same analysis found that firms responding within the first hour were nearly 7 times more likely to qualify the lead than those responding later. A different finding, but pointing the same way. People often mix up the two studies and wrongly give Harvard the 100x and 21x figures. Cite each correctly.
What the research shows
| Source | Finding |
|---|---|
| MIT / InsideSales.com (2007), 15,000+ leads, 100,000+ dials | 5-minute vs. 30-minute response: ~100x higher contact odds, ~21x higher qualification odds |
| Harvard Business Review (2011), 2,241 US firms audited | 42-hour average response time; 23% never responded; response within 1 hour: ~7x more likely to qualify |
People often credit the 100x and 21x figures to Harvard Business Review. They come from the MIT and InsideSales work. Cite sources correctly.
What a realistic target looks like
Treat 5 minutes as the ideal ceiling for a hot inbound lead during staffed hours. Treat any real improvement over a multi-hour or next-day response as progress. The research shows the biggest drop-off happens in the earliest minutes and hours, not only at the extreme end. For hours when no one is watching for new leads, an automated acknowledgment closes some of the gap until a human follow-up happens.
Disclosure: SalesCrew is our product. Speed-to-lead actions, like an automatic acknowledgment or round-robin assignment on a new inbound lead, run from the same inbound channel where forms and Calendly bookings arrive with the rest of the pipeline.
Cite the correct study for each figure
Questions
- What is a realistic target if 5 minutes is not achievable?
- The research shows a steep drop-off. Even moving from a multi-hour or next-day response to a same-hour response captures meaningful gains. Treat 5 minutes as the ideal ceiling, not an all-or-nothing bar.
- Does the target change outside business hours?
- The studies measured response time generally, not only in business hours, and leads do not stop arriving outside them. An automated acknowledgment for after-hours submissions helps close the gap when a live 5-minute response is not staffed.
- Is the 5-minute number realistic for every business?
- It is a strong benchmark grounded in real research. Whether it is achievable depends on staffing and lead volume patterns specific to your business. Track your own response-time-to-conversion relationship for the most accurate target.