Customer discovery interviews, and how many are enough
B2B customer discovery interviews: the sample size the research converges on, why your segments change that number, and the questions that get honest answers.
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The three month assumption is right for one of the two sales jobs and roughly half the truth for the other. The gap is not effort, it is arithmetic, and your own sales cycle sets the floor.
The number a founder has in mind for a new salesperson is usually three months. It is rarely written down and it is almost never where the figure came from, which matters, because the plan built on it decides when you hire the second one and when you start worrying about the first.
There is published research on this, with a disclosed sample, and it says the honest answer depends almost entirely on which job you hired for. A prospecting hire and a closing hire do not ramp on the same clock, and treating them as one number is how a reasonable hire gets written off two months before they were ever going to produce.
The Bridge Group has run biennial research on these roles since 2006 and publishes the sample. Its 2026 report on account executives, published in June 2026 from a survey of 158 B2B companies run across the first two quarters of the year, puts average ramp time for a closing rep at 6.2 months, which it notes is the highest in the study's history.
Its 2025 report on sales development, from 351 B2B companies, puts average ramp for a prospecting rep at 3.0 months, the lowest since 2010. Same research house, same method, two roles, and a gap of more than three months between them.
So the three month assumption is not wrong. It is right for one of the two jobs and roughly half the truth for the other. If you hired someone to find conversations, three months is a fair expectation. If you hired someone to close deals, you have budgeted for less than half the ramp the market reports.
The mechanism is not effort, it is arithmetic. A prospecting rep performs their main activity dozens of times a day, so they accumulate repetitions fast and the feedback arrives within a week. The same research puts the median prospecting rep at 112 total activities a day and 4.1 quality conversations.
A closing rep's unit of work is a deal, and a deal takes as long as your sales cycle. They cannot have run twenty of them by month two if your cycle is ninety days, because the first ones have not finished yet. Ramp for a closer is therefore bounded below by your own sales cycle, and no onboarding programme compresses it past that.
Two other figures from the 2026 report point the same way. Median quota is $960K against a median on target earnings of $200K, a quota to OTE ratio of 4.6 times, up from 4.2 in 2024. And the share of reps hitting quota fell to 48% from 51% in 2024. Rising quotas against falling attainment is the context your ramp plan sits inside: the bar moved, which is part of why the reported ramp is the longest it has been.
Since a closer's ramp is governed by cycle length, the usable rule is to derive it rather than adopt it. Take your own median time from first conversation to signature, double it, and that is roughly when you should expect a representative month from a new closer. Doubling it accounts for the fact that their first deals start from a cold pipeline rather than an inherited one.
| What you hired for | Reported average ramp | What governs it | First honest review point |
|---|---|---|---|
| Prospecting (SDR or BDR) | 3.0 months | Repetitions per week | Week 6, on activity and conversation quality |
| Closing (account executive) | 6.2 months | Your sales cycle length | One full cycle, on pipeline created |
| Closing, long cycle over six months | Longer than reported | Cycle, plus committee access | Half a cycle, on meetings with real buyers |
| Founder handover, no playbook | Longest in practice | What was never written down | Week 2, on whether they can retell the pitch |
The bottom row is the one that quietly breaks plans. A hire following a documented motion is ramping; a hire reverse engineering a motion that only exists in the founder's head is doing discovery work and calling it onboarding. That distinction is the subject of the founder led sales playbook, and writing it down is the cheapest ramp reduction available.
The practical problem with a six month ramp is that revenue tells you nothing for most of it, so teams either fly blind or panic early. The fix is to review leading indicators on a schedule and to say in advance which ones.
Those four reviews need numbers that are current rather than assembled by hand the night before. On the tooling for that, and specifically on how little of it needs to be live, rivl has a useful read in a real-time dashboard for a sales team, and what real means.
Tenure is the reason the schedule matters. The same sales development research puts average tenure in the role at 1.9 years, the highest since the early 2010s. Against a three month ramp that is a reasonable return on the investment. Against a six month ramp for a closer who leaves at eighteen months, you have spent a third of their time with the company getting them ready, and the review schedule is what stops you discovering a mis-hire at month five.
Two cases where the figures above should not drive the decision.
The first is a first sales hire. Nothing ramps if founder led selling was never repeatable, because there is no motion to transfer, and the ramp conversation is premature. The readiness tests that come before it are in when to hire your first salesperson.
The second is when you are hiring for prospecting and considering buying it instead. A three month ramp you pay a salary through has a real alternative, and the comparison is not just cost per meeting: outsourced SDR vs in house sets out what each option actually buys. And if you have not yet settled which of the two jobs you are hiring, the split and the ratios are in how to structure a small B2B sales team.
These figures are survey medians and averages, and the researchers say so themselves: the 2026 report states plainly that this is observational survey data rather than a controlled experiment, and that the sample skews towards organisations with engaged revenue leadership. Both samples are also heavily North American and heavily software, with the sales development study reporting a median company revenue of $47M and a median deal size of $50K. If you sell services in the Gulf at a different deal size, treat the numbers as a direction and the mechanism as the transferable part.
The mechanism is the part that travels. Prospecting ramps on repetitions, closing ramps on cycles, and nothing written down ramps on hope. Those hold regardless of market.
Last caveat, and it is the one that costs the most. A long ramp is not evidence of a good hire any more than a short one is evidence of a bad fit. The number tells you when to judge, not what to conclude. If you have no documented pipeline expectation for month three, extending the ramp just extends the time before anyone has to form a view, and that is usually the more expensive mistake.
Send three things: your median time from first conversation to signature over the last ten deals, whether the hire is prospecting or closing, and what is already written down that they can follow. We will come back with a review schedule by week and the one leading indicator worth watching at each point.
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