Client Concentration Risk Calculator
Measure how dependent your income is on a small number of clients and the risk involved.
Client risk details
This calculator auto-updates when values change.
Measure how much revenue depends on one client or a small group of clients.
Largest client exposure
43.3%
High risk: your largest client represents 43.3% of income and the top three represent 75.8%.
Risk level
High risk
Top 3 concentration
75.8%
Largest client income
£52,000
Income at risk
£52,000
About This Client Concentration Risk Calculator
Client Concentration Risk Calculator is designed for practical business planning, not abstract spreadsheet modelling. It turns a common commercial decision into a clearer number so you can compare options before committing time, money, or client expectations.
One large client can make revenue feel stable until that client pauses, renegotiates, or leaves. Concentration risk measures how exposed the business is to that single decision.
The result is an estimate based on the inputs you provide. Real outcomes depend on taxes, contracts, payment timing, market demand, client behaviour, and operating costs.
Practical Example
If one client provides 43% of annual income, losing that client would create a major revenue gap even if total income currently looks healthy.
The useful part is not only the headline result. The supporting breakdown shows which assumption drives the outcome and where a small change would make the biggest difference.
How to Use This Strategically
Use the result to plan diversification. That might mean building a pipeline, reducing dependency gradually, creating retainers, or increasing prices for smaller clients.
Run a conservative scenario and an optimistic scenario. If the decision only works under perfect assumptions, it probably needs a stronger margin of safety.
Common Mistakes to Avoid
Avoid using best-case inputs for billable time, conversion, churn, client stability, or costs. Business calculators are most useful when they reveal risk early rather than confirming a plan you already wanted to believe.
If the result affects pricing, hiring, contracts, product direction, or cash reserves, compare it with real accounting data and professional advice before making a major decision.
How to Use This Calculator
- 1
Enter realistic inputs
Use current numbers where possible, and avoid best-case assumptions unless you are deliberately testing upside.
- 2
Review the headline result
Start with the main result, then compare the supporting metrics underneath it.
- 3
Test a second scenario
Change the weakest assumption to see whether the decision still works.
- 4
Use the output for planning
Treat the result as a planning signal, not as a guaranteed business outcome.
Frequently Asked Questions
What does the Client Concentration Risk Calculator do?v
Measure how dependent your income is on a small number of clients and the risk involved.
Are the results exact?v
No. They are estimates based on the numbers you enter and should be checked against real business records.
Can I use this for client or investor decisions?v
Yes as a planning aid, but important decisions should be supported by accounting, legal, tax, or commercial advice where relevant.
Why should I test multiple scenarios?v
Business plans are sensitive to assumptions. A low, expected, and high scenario gives a more useful range than one perfect-looking result.