Aim for 30-45 minutes in B2B sales: 25 minutes for SMB, 30-40 for mid-market, 45-60 for enterprise. Shorter calls leave pain uncover unsurfaced; longer ones lose buyer attention after 47 minutes.
Thirty to forty-five minutes is the sweet spot for a B2B discovery call. Shorter than 30 minutes and you won't surface enough pain; longer than 45 minutes and your prospect's attention collapses.
The exact length depends on deal size. A 25-minute call works for SMB deals ($5K-$25K ACV) where the buyer is often the founder and has a shorter attention window. Mid-market deals need 30-40 minutes to uncover impact and timeline. Enterprise deals—where you're mapping multiple stakeholders and complex problems—should run 45-60 minutes.
The hard stop is around 47 minutes. After that, buyers disengage rapidly. You can see it in conversation patterns: questions get shorter, responses get thinner, and the prospect starts checking the clock.
The call needs three things: diagnosis of the problem, clarity on how big it is, and agreement on next steps. You cannot do any of these in 15 minutes. You also cannot do them well if you are still talking at minute 55.
Most of the call should be spent on questions—about 60% according to top performers. The remaining 40% is listening, responding, and setting up next steps. If you are pitching or presenting during discovery, you have already lost the structure.
The research shows the difference. Discovery calls at optimal duration (25-45 minutes depending on segment) close at 32%. Calls under 15 minutes close at 18%. Rushing does not save time; it wastes it.
Three habits extend calls beyond useful:
Asking lazy questions and then recovering. You realize question 3 was not good, so you ask question 4 to clean it up. You have now burned 8 minutes. Prepare your questions beforehand so you ask them once.
Letting the prospect educate you. A strong credibility statement—60 to 90 seconds, targeted to their role and industry—usually triggers a 2-3 minute monologue where they lay out the problem themselves. If your opener is vague, they spend 15 minutes teaching you about their company instead.
Pitching or demoing during discovery. The call is for qualification, not persuasion. Save the demo for after you have confirmed fit. Every minute spent explaining your product is a minute not spent understanding their problem.
A time-boxed agenda keeps the call tight:
The Pain and Impact section is the engine of the call. This is where reps get the information that determines whether you move forward. It is the only section worth extending.
A few situations demand more time:
Complex enterprise deals with multiple stakeholders or regulatory constraints may legitimately need 60 minutes. But this should be rare—usually a second call or a working session, not the initial discovery.
A prospect is willing to go deep. If they are still talking at minute 45 and still answering questions—not time-checking—keep going. But watch for the shift from engaged to obligated.
You have uncovered something unexpected that changes the scope of the deal. You may need 10 extra minutes to re-qualify. That is fine. But use it to confirm the new reality, not to explore it.
Discovery is not complete when the call ends. Send a personalized summary within 24 hours that reflects back what you heard, confirms your understanding of the pain and impact, and lays out the next step with a date.
Reps who do this see higher close rates because the prospect re-enters the follow-up with clarity instead of vagueness. You have already structured the thinking. The next conversation is about solutions, not re-explaining problems.
Do not end discovery with "Let me know if you want to talk" or vague talk of next steps. Know what happens next before you hang up. State it. Send it in writing. The format—a short email with a link to book the next call—takes 2 minutes and anchors everything that follows.
No. Calls under 30 minutes rarely surface enough pain to qualify properly and close at only 18% versus 32% for optimal duration. Even for SMB deals, 25 minutes is the minimum; mid-market and enterprise need longer.
The difference is deal size and stakeholder complexity. A 30-minute call works for mid-market deals with one or two decision-makers; a 45-minute call is for enterprise deals with multiple stakeholders and broader impact. Longer calls give you time to map the full buying group.
Yes. Calls under 15 minutes fail to uncover real pain or build credibility, resulting in 18% close rates. You need at least 25-30 minutes to ask good questions, listen to answers, and confirm fit before moving to a demo or next step.
Attention and patience are finite. After 45 minutes, cognitive load increases and most buyers start mentally checking out, even if they stay on the call. Extending past this point adds listening fatigue, not information.
Leave buffer time. A 30-40 minute call plus 5-10 minutes to update notes and CRM before the next one prevents fatigue and sloppiness. Running calls back-to-back means poor notes and worse follow-up—the opposite of what discovery should deliver.
Part of our guide to Discovery calls.
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