Revenue Concentration (Top Client Share)

It shows how much of your income depends on one customer — high concentration means one lost contract can crater the business.

Formal definition

Revenue concentration equals the largest client's revenue divided by total firm revenue, expressed as a percentage.

Why it matters

Agencies and freelancers with more than about 30% from one client are fragile; investors and banks flag this in diligence.

Where you see it

• Agency board and partner meetings
• SBA and bank loan underwriting
• Management consulting risk reviews
• Freelancer financial planning
• MBA entrepreneurship case studies

Worked example

1. Total agency revenue: $500,000.
2. Largest client revenue:
3. Concentration = (
4. Interpretation: One client is 25% of revenue — manageable but worth monitoring.

How Business metrics calculates it

Largest client revenue ÷ Total revenue × 100.

The range we use for status labels

On Business metrics, the status band for this KPI is roughly 0 to 30. Lower values are generally healthier in this band. Your niche can sit outside it honestly — the label is a prompt to read the coaching, not a certificate.

Where people fool themselves

Concentration of 36% is not illegal; it is a single point of failure. The “fix” is not always more tiny clients — it can be a contract notice period. The ratio just makes the risk visible.

Run it on your own numbers: the Freelance & Agency calculator.