Start from your best existing customers

Open your invoices and list your twenty best customers. Rank them by a mix of profit, payment behaviour, repeat orders and how pleasant they are to work with. Do not rank only by revenue. A customer who is large but demands heavy discounts and pays late may be worse for you than a smaller, steady one.

Now look for patterns. What industries are they in? How big are they? Who makes the buying decision? How did they find you? What problem were they trying to solve when they came to you?

Also study the customers who went wrong

Make a second short list: customers who left quickly, caused disputes, needed constant support or never paid on time. Compare them with the first list. The differences are often more revealing than the similarities.

For example, a software training provider may find that small firms with a single decision maker sign quickly and complete the course, while large firms with committees stall for months and cancel. That is useful guidance on where to focus.

Do not skip the awkward customers. Owners often avoid analysing them because it feels negative, yet the pattern is plain once you look: the same type of buyer who negotiates endlessly, changes requirements late and pays slowly. Naming that type lets you either price for the extra effort or politely decline.

Write the profile on one page

A good ICP is specific enough that a salesperson could decide in two minutes whether a lead fits. It combines facts about the business with facts about the buyer and the situation.

  • Type of business: sector, size, location, how it operates
  • Buyer: role, what they care about, what worries them
  • Trigger: the event that makes them look for a supplier now
  • Problem: what is not working for them today
  • Warning signs: traits that usually lead to trouble

Use the profile to change what you do

A profile that stays in a document changes nothing. Use it to choose where you advertise, which events you attend, what your website says, and which leads your team follows up first. Give your sales team a short checklist so they can qualify leads quickly and politely drop poor fits.

It also shapes your offer. If your best customers all value fast response, make that visible in your promise and your service process. Do not keep pitching speed to people who only want the lowest price.

Try a simple exercise with your team. Each person describes the last good lead they met and the last poor one, using only the profile's headings. Where they disagree, refine the wording until a new joiner could apply it without asking you.

Keep it alive

Your best customer today may not be your best customer in two years. Revisit the profile every six to twelve months, using fresh data. Check whether the people you are winning match the profile, and whether the profile still delivers the margin you want.

You can also have more than one profile, as long as each is clear. A business serving both retail shops and institutions may need two, with different messages for each.

An ideal customer profile is a sharper way of saying who you serve best. Build it from evidence, write it on a page, and let it guide your marketing, sales and service choices. Start this week by listing your twenty best and ten worst customers, and see what they tell you.