Most ICPs I review were written in a workshop. They sound reasonable ("mid-sized financial institutions undergoing digital transformation") and they change nothing, because they describe half the market.
An ICP is only valuable if it changes decisions: which accounts you target, which leads sales prioritises, which messages you lead with, and which deals you walk away from.
Step 1: Pull three lists from your CRM
- Closed-won in the last 12–24 months
- Closed-lost, with loss reasons where you have them
- Churned or downgraded customers
The insight lives in the contrast between these lists, not in any one of them.
Step 2: Compare the patterns
For each list, look at firmographics (industry, size, region, tech stack), situational triggers (new regulation, a funding round, a leadership change, a legacy system reaching end of life) and deal behaviour (cycle length, deal size, number of stakeholders).
You're looking for answers like: "Deals with companies replacing a legacy system closed 40% faster than greenfield deals." That's a finding you can act on. (Your numbers will differ. The point is to find yours.)
Step 3: Talk to customers and to the ones who got away
Five to eight short interviews with best-fit customers, plus two or three with lost prospects, will tell you what data can't: the trigger that started the search, the alternatives they considered, the words they use to describe the problem, and the moment they decided.
Capture their exact language. It becomes your messaging.
Step 4: Score segments on four dimensions
| Dimension | Question |
|---|---|
| Fit | Does our product solve their problem better than the alternatives? |
| Urgency | Is there a trigger forcing a decision this year? |
| Value | Deal size, expansion potential, retention |
| Reachability | Can we find and reach them efficiently? |
Prioritise the one or two segments that score highest. Name the segments you will not target. That's where the savings come from.
Step 5: Map the buying committee
B2B purchases, especially in financial services, involve several people with different concerns: an economic buyer, a champion, technical evaluators, risk and compliance, and procurement. For each, document what they care about, what they fear, and which questions they ask.
Step 6: Turn it into rules
An ICP becomes real when it turns into:
- Targeting criteria for LinkedIn, Google and outbound lists
- Qualification rules that sales and marketing agree on
- Messaging priorities by persona
- Content topics built around the triggers you found
Revisit it every quarter
Markets move. A quarterly refresh using new closed-won and lost data keeps the ICP honest, and keeps marketing from drifting back to "everyone."
Key takeaways
- Build your ICP from closed-won, closed-lost and churned deals, not workshop assumptions.
- Check the patterns with customer and lost-prospect interviews.
- Score segments on fit, urgency, value and reachability, then turn the ICP into targeting and qualification rules.
Frequently asked questions
How do you create an ideal customer profile for B2B SaaS?
Compare closed-won, closed-lost and churned accounts in your CRM, interview best-fit customers and lost prospects, score segments on fit, urgency, value and reachability, then document the winning segment and turn it into targeting rules.
How often should you update your ICP?
Review it every quarter using new closed-won and closed-lost data, and immediately after major changes such as a new product, a new market or a pricing change.
What data do you need to build an ICP?
Firmographics, situational triggers, deal behaviour (cycle length, deal size, stakeholders) and retention data for won, lost and churned accounts, plus qualitative insight from customer interviews.
About the author
Manika Gupta is the founder of Dominize Consultancy, an AI GTM and growth consultant for B2B SaaS. She works across product marketing, GTM, demand generation, analytics and AI automation, including global product launches in banking technology. She also built an AI competitive-intelligence product. More about Manika →
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