Most ICP documents sit in a Google Doc that nobody reads. Here's how to build one that makes a real difference to what your team does every day.
Every sales team has an ICP document. Very few teams actually use it. It sits in a Notion page, gets referenced in onboarding, and then quietly ignored in favour of whoever is easiest to reach this week. The problem usually isn't that the ICP is wrong — it's that it's not connected to anything actionable.
What makes an ICP usable?
A usable ICP has three properties. First, it's specific enough to filter with — you can apply it to a list of businesses and get a meaningful subset. Second, it's connected to real evidence — your best customers, not your wishlist. Third, it's operationalised — it shows up in your tooling, not just your documentation.
Start with your best customers
Pull your ten best customers — highest LTV, fastest time-to-value, most referrals, fewest support tickets. Look at what they have in common: industry, size, technology, team structure, the trigger that made them buy. This is your ICP in embryo.
- Industry and sub-vertical
- Employee count and revenue band
- Tech stack (especially tools that indicate fit)
- Geography and language
- Organisational triggers (funding, headcount growth, new leadership)
- The role and seniority of your champion
Make it a filter, not a description
The test of a good ICP is: can you feed it into a data tool and get a list of matching businesses? If your ICP says 'growing companies that value data' you can't filter for that. If it says '50–250 employees, Series A–C funded, using Salesforce, in B2B SaaS' you can.
“The ICP isn't a description of who you'd like to sell to. It's a machine for generating lists of who you should call next.”
Operationalise it
The ICP becomes valuable when it's in your tooling. Aonsight's ICP Matching feature lets you codify your criteria and apply them automatically against the full dataset — so every prospect already has a fit score before your reps look at it. The ICP becomes a ranking system, not a document.
Aonsight Personas lets you build your ICP as an addressable segment — real businesses and contacts that match, ready to prospect from day one.
Review and iterate
Your ICP should change as you learn. Review it quarterly against win/loss data. If you're consistently winning in a segment you didn't define as ICP, update it. If a segment that looked promising is churning fast, remove it. A living ICP is far more valuable than a perfect static one.