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The "speed-to-lead" rule

Last reviewed 19 May 2026 | Growth Check editorial team

One of the most replicated findings in B2B lead research: responding to a web enquiry within 5 minutes makes you 9× more likely to convert it than responding after 30 minutes (Harvard Business Review, Lead Connect, InsideSales).

Why

When someone fills in a web form, they've usually opened 3–5 other tabs and filled in 2–3 other forms. The first business that calls back wins. By the time the second one calls, the customer has already booked someone.

What this means for trades

  • Get notifications instantly, push to a phone, not just an email that sits in an inbox.
  • Have someone who can answer between 8am and 8pm at minimum.
  • If you can't respond fast, at least send an automated text acknowledging the enquiry and giving an ETA.
  • Track your response time, most businesses say "we reply fast" without measuring it.

The blunt maths

If you generate 20 leads/month and convert 30%, you get 6 customers. Cut response time to 5 minutes and convert 50%, 10 customers. Same traffic, 65% more revenue. Speed-to-lead is usually a bigger lever than more SEO.

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