By Michael K. Adonteng

August 18th, 2026

Know Your 20%: The Pareto Principle in B2B Sales

Every commercial leader can name their biggest client.

Far fewer can tell you what percentage of total revenue their top ten clients represent.

Or what those clients have in common beyond paying their invoices.

That gap in self-knowledge is expensive.

It means territory and senior selling time get allocated on instinct, not evidence.

The Audit

List your top ten clients by value.

Note sector. Whether it genuinely fits your ideal customer profile. Estimated revenue contribution.

Circle the two or three that drive roughly 80% of results.

The value here isn’t the ranking. Most leaders have a rough sense of who their biggest clients are.

It’s the pattern that emerges once you look honestly at what the top 20% share.

Sector. Company size. Origination channel. Deal cycle.

Almost always a pattern is there.

Almost always the business hasn’t built its go-to-market motion around it deliberately.

Where This Goes Wrong

Fast-growing businesses fall into a specific trap.

Because early revenue came from wherever it could be found, the sales motion never specialised.

The team runs three or four different sales processes simultaneously.

None of them optimised.

The account that looks best in the pitch deck is often not the account making the most money.

Headwinds and Tailwinds, Mapped Honestly

A useful companion exercise: map the forces working against you and in your favour, stated plainly.

Not diplomatically. Honestly.

Three or four entries each is usually enough to reshape a territory conversation.

From Insight to Territory Decisions

Once the pattern is identified, score prospective accounts against what your best clients actually share.

Deal size potential. Sales cycle length. Strategic fit. Payment reliability.

Reallocate senior selling time toward the top-scoring segment before adding headcount anywhere else.

This is uncomfortable.

It usually means deprioritising accounts that feel important, often because they’re large or visible, in favour of a segment that’s smaller but disproportionately profitable.

That discomfort is the point.

Prioritisation that doesn’t cost you something isn’t really prioritisation.

A Caution

The Pareto principle is a tool for focus. Not a licence to abandon diversification entirely.

Particularly where concentration risk in a single sector or client is a real, separate concern.

This Week

Complete the ten-client audit honestly. Including the uncomfortable parts.

Write down, in one sentence, what your top 20% have in common.

Make it the first filter your team applies to every new prospect this quarter.

If you want the Pareto audit and sector scoring model we use with clients, request it and you’ll get the structured template.

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Explore our articles section for other topics of interest.

Michael K. Adonteng
Founder, ASA 

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