- 67% of customers who had a great experience with an employee said they would buy again from that organisation, compared to 11% who had a bad experience.
- 63% of customers who had a great experience with an employee said they would recommend that organisation, compared to 10% who had a bad experience.
Investing in service improves customer satisfaction, drives retention, and ultimately boosts revenue.
The methodology
The following outlines the recommended steps to implement this metric:
- Collect your CSAT/NPS data ā Gather all your customer satisfaction (CSAT) or Net Promoter Score (NPS) data, ensuring it is directly linked to individual customers.
- Analyse the correlations ā Track customer retention and churn over time, identifying statistical relationships between CSAT/NPS improvements and changes in retention rates. Isolate an improvement and see how this has impacted CSAT/NPS and retention.
- Establish the business impact ā Quantify the effect of higher CSAT/NPS on retention specifically, demonstrating how an increase in satisfaction leads to a reduction in churn and an increase in customer loyalty.
- Calculate the financial consequenceĀ ā Determine the revenue impact of improved retention, translating increased customer lifespan into additional business revenue.
- ROI Calculation ā Compare the financial benefit of increased retention-driven revenue against the initial investment in service improvements.

An example of how an organisation might use the CSAT and Retention metric
A subscription-based company wanted to understand how customer satisfaction (CSAT/NPS) impacted retention. They tracked CSAT scores alongside churn rates over six months, identifying a clear correlationāhigher CSAT led to lower churn.Ā By quantifying this link, they found that a 10-point NPS increase reduced churn by 5%, translating to Ā£4M in retained revenue. With a Ā£1M investment in service improvements, their net ROI was Ā£3M.
This analysis proved that investing in customer experience directly drives retention, revenue, and long-term business growth.
Things to consider
This method is most effective in sectors with recurring revenue, such as Insurance, Energy, and Telecoms, where customer retention and churn significantly impact long-term profitability.
While proving this metric demonstrates the business value of improving CSAT, it does not pinpoint which service strategies will drive the greatest improvement. Additional analysis is required to identify the most effective initiatives.