Business
Customer revenue concentration Calculator
Measure dependence on the largest customers and the concentration of your revenue base. This free customer revenue concentration calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Measure dependence on the largest customers and the concentration of your revenue base.
Calculated outcomes
- Total Customer Revenue
- €220,000.00
- Customer Count
- 6
- Equal Sized Customer Equivalent
- 3.4571×
Assumptions and estimates
- Include every active customer's annual revenue on the same basis. The concentration index sums squared percentage shares (0–10,000); it measures dependence, without inferring legal competition thresholds or a universal safe level.
- Method: Concentration index = sum of squared percentage revenue shares. Equal-sized equivalent = 1 ÷ sum of squared decimal shares.
- The index is a commercial dependency measure. It does not imply legal competition thresholds or a universal safe concentration.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the customer revenue concentration calculation works
Concentration index = sum of squared percentage revenue shares. Equal-sized equivalent = 1 ÷ sum of squared decimal shares.
The index is a commercial dependency measure. It does not imply legal competition thresholds or a universal safe concentration.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review largest customer percent and top three customer percent and revenue concentration index, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Revenue by customer (€; commas)
- 100000, 50000, 30000, 20000, 10000, 10000
- Largest Customer Percent
- 45.45%
- Top Three Customer Percent
- 81.82%
- Revenue Concentration Index
- 2,892.56