One of the most common questions we hear from clients is: "Our NPS has declined, but many of our other metrics are positive. What is actually causing it?"
It's a fair question. A falling Net Promoter Score (NPS) doesn't necessarily mean every part of your customer experience has worsened. The answer often lies beneath the headline score, in the themes, comments and sentiment customers leave behind.
NPS is calculated by subtracting the percentage of detractors (those scoring 6 or less) from the percentage of promoters (those scoring 9 or 10), producing a score between -100 and +100. The higher the score, the more loyal your customers are.
A declining NPS is often an early warning sign but understanding why means looking beyond the score itself. In this blog, we'll explain what a declining NPS could mean and what to investigate first.
NPS is the starting point, not the full story
NPS is one of the most valuable indicators of customer loyalty because it measures how customers feel about their overall experience with your business. However, it's only one metric.
Customers may be satisfied with the service they received while feeling less willing to recommend your business. Expectations change, competitors improve, and even small frustrations can influence whether someone becomes a promoter, passive or detractor.
For example, a customer may have received their mortgage offer on time and rated the experience highly overall, but repeated communication delays during the application process could still reduce their willingness to recommend the lender.
This is why NPS can decline before other performance metrics begin to change.
Why your other metrics may still look healthy
It's not unusual for overall satisfaction, review ratings or customer service scores to remain stable while NPS declines, because they measure different aspects of the customer experience.
• Overall satisfaction reflects how happy customers were with their experience.
• Numerical ratings such as value for money measure how customers rate the service they receive.
• NPS measures whether customers feel positively enough about the experience to recommend your business.
A customer can be satisfied without becoming an advocate. For example, some older customers may be uncomfortable recommending financial products, choosing a neutral or even zero score despite being satisfied with the service.
Likewise, a small increase in customers giving scores of 7 or 8 (passives), or a handful of additional detractors, can reduce your NPS even if most customers remain happy.
This is why it's important not to focus solely on the headline score.
Look beyond the score - this is where the real insight begins
When NPS changes, the next step isn't simply to ask "What was our score?"
Instead, ask:
• What are customers talking about?
• Have particular themes become more negative?
• Are the same issues appearing repeatedly?
• Which products are driving the change?
• What are promoters praising and has that changed over time?
This is where customer feedback becomes incredibly valuable.
For example our analytics dashboard helps providers to look beyond the score by uncovering the themes, sentiment and customer comments influencing their NPS.
Which themes are driving customer feedback?
The theme breakdown on our analytics dashboard groups customer feedback into common topics, making it easier to understand what customers are discussing most frequently.
These themes might include areas such as customer service, communication, price/rates, complaints, branch environment or product attributes.
Has sentiment shifted?
Sentiment analysis classifies customer comments as positive, neutral or negative, helping you understand how customers feel about each aspect of their experience.
Looking at sentiment alongside your themes allows you to identify whether customer perception is changing, even when review ratings remain stable.
For example, communication may still be one of your most discussed themes, but an increase in negative sentiment could suggest that customers are becoming less satisfied with updates or response times.
Theme split by sentiment
In addition, “theme split by sentiment” shows whether customers are talking positively or negatively about each area of your business.
For example, customer service may continue to receive overwhelmingly positive feedback, while comments relating to communication become increasingly negative.
This helps you prioritise where improvements are likely to have the greatest impact on customer advocacy.
Is the issue linked to a particular product?
Not every product performs in the same way. Product sentiment allows you to identify whether certain products or journeys are generating more positive or negative feedback than others.
This can help pinpoint whether a decline in NPS is being driven by one particular part of your business rather than reflecting the customer experience as a whole.
That’s it for now and in my next blog, I’ll go into more detail and help you turn insight into action.
