Interview six to ten recent, best-fit customers plus a few lost or churned ones. Ask about the problem (what they were trying to do, how they handled it, what it cost), the trigger (what changed that made them act then, where they looked first), and the decision (what else they considered, who approved it, what nearly stopped them). Then check your own data for which customers got value fastest, stayed longest, and referred others. Map the most common answers, in customers’ own words, onto each line of your profile.
The best ideal customer profiles are not written in a strategy meeting. They are assembled from what your best customers say when you ask them the right questions — and, just as usefully, from what your worst-fit customers say too.
Below are the questions to ask, grouped by what each set tells you, followed by the questions to ask yourself about your own customer data and how to turn the answers into a profile you can use.
Who to ask
Interview people who bought recently enough to remember why. Six to ten conversations are usually enough to see patterns; after that the answers start to repeat. Aim for a mix:
- Your best customers: got value quickly, pay on time, stayed, and would recommend you. They define the profile.
- Recent buyers: signed up in the last few months, so the trigger and the alternatives they considered are still fresh.
- Lost prospects and churned customers: they show you where the edges of the profile are and which disqualifiers you need.
If you have no customers yet, ask people who have the problem and are solving it some other way. Use a draft from the ideal customer profile generator to decide who to approach, then let the interviews correct it.
Ask for twenty minutes, explain that you are trying to understand the problem rather than sell, and record or take notes on exact phrases. Their wording is the most valuable thing you will collect.
Questions about the problem
These tell you what the customer was struggling with, in their words, before your product existed for them.
- What were you trying to get done when you started looking for something like this?
- How were you handling it before? What did that involve, week to week?
- What was the most frustrating part of that?
- What did it cost you — time, money, stress, missed opportunities?
- How would you describe the problem to a colleague who had never heard of us?
- Who else in your organisation or household felt the problem?
Listen for the difference between a mild annoyance and a real cost. “It was a bit tedious” describes a customer who can live without you. “I was losing a day a week to it” describes an ideal one.
Questions about the trigger
These are the questions most interviews skip, and they produce the most useful line in the profile: the event that makes someone ready to buy.
- You had this problem for a while. What changed that made you decide to fix it then?
- Was there a specific moment or event? A new hire, a deadline, a bad week, a new client?
- What would have happened if you had left it another six months?
- Where did you look first for a solution? What did you search for?
- Who did you ask for recommendations?
- Weak answer
- “We just thought it was time to get organised.”
- Useful answer
- “Our office manager quit in March and I realised nobody else knew how the booking system worked.”
When several customers describe the same kind of event, you have found a trigger you can watch for in public: job ads, announcements, reviews, or posts. That turns your profile from a description into a way of finding people at the right moment — the idea behind treating customer finding as a timing problem.
Questions about the decision
These tell you who buys, what they compared you against, and what nearly stopped them.
- What other options did you consider, including doing nothing or building it yourself?
- Why did you choose us over those?
- Who else was involved in deciding? Who had to approve the cost?
- What almost stopped you from buying?
- What did you need to see or hear before you were comfortable going ahead?
- What result made you feel it was worth it? How long did that take?
- Who else do you know with the same problem?
The answers to question 14 tell you whether you need a separate buyer persona for the person who approves the spend. The answers to question 18 are often your first referrals.
Questions to ask about your own data
Interviews tell you why customers buy. Your own records tell you which customers are actually worth having. Answer these before you finalise anything:
- Which customers got value fastest after signing up?
- Which pay the most, or have grown their spend over time?
- Which stayed longest, and which left early? What did the early leavers have in common?
- Which customers need the most support relative to what they pay?
- Which ones referred someone else?
- Where did your best customers first hear about you?
Look for the overlap: customers who show up on the “fast value, stayed, referred” lists and not on the “heavy support, left early” lists. That group is your ideal customer. Everyone else is useful mostly for writing your disqualifiers — see signs you are targeting the wrong customers.
Turn the answers into a profile
Map each group of questions to a line of the profile and fill it with the most common answer, in the customer’s own words:
They areThe shared situation among your best customers (data questions, question 6)
They struggle withTheir description of the problem (questions 1–5)
Urgent whenThe most common trigger (questions 7–9)
They currently useThe alternatives and workarounds (questions 2 and 12)
Find them inWhere they looked and who they asked (questions 10–11, 18)
IgnoreWhat your churned and poor-fit customers had in common
Write it, then test it. Use the profile to search for ten new prospects and see how many genuinely match. Revise from what you learn. For worked results in different industries, see these ideal customer profile examples; when you are ready, move on to finding your ideal customers.