NPS (Net Promoter Score): Measuring Customer Loyalty

NPS, or Net Promoter Score, is a customer loyalty metric designed to measure the degree of satisfaction and the likelihood of a customer recommending a company, product, or service to others. The beauty of NPS lies in its simplicity. It is based on a single question, known as “the ultimate question”: “On a scale of 0 to 10, how likely are you to recommend [Company Name] to a friend or colleague?”

Based on the answer to this question, customers are classified into three categories:

1. Promoters (Score 9 or 10): These are loyal and enthusiastic customers. They are extremely satisfied with the company and act as brand ambassadors, actively recommending it and driving growth.
2. Passives or Neutrals (Score 7 or 8): These are satisfied but not loyal customers. They like the product but are not engaged enough to promote it. They are vulnerable to competitors' offers and can easily switch providers.
3. Detractors (Score 0 to 6): These are dissatisfied customers. They had a bad experience and, in addition to having a high probability of churning, can actively harm the brand through public complaints and negative word-of-mouth.

The NPS calculation is simple: NPS = % of Promoters - % of Detractors. The result is a number that can range from -100 (if all customers are detractors) to +100 (if all are promoters). Companies typically track their NPS evolution over time as one of the main indicators of the health of their customer relationships.

But the power of NPS goes beyond the number. Most NPS surveys include a second open-ended, qualitative question: “What is the main reason for your score?” The answers to this question are a goldmine of feedback. Promoters tell you what the company is doing right and what should be reinforced. Detractors pinpoint exactly what problems need urgent resolution.

Example in an entrepreneur's routine:

An e-commerce company, “CasaBonita,” decides to implement NPS. After each purchase, the customer receives an email with the survey. In the first month, they receive 1,000 responses:

• 600 customers gave a score of 9 or 10 (60% Promoters)
• 250 customers gave a score of 7 or 8 (25% Passives)
• 150 customers gave a score of 0 to 6 (15% Detractors)

CasaBonita’s NPS is: 60% - 15% = 45. An NPS of 45 is considered good in most industries. But the CEO is not content with just the number. He delves into the open-ended question responses.

He discovers that Promoters consistently praise “packaging quality” and “delivery speed.” He realizes these are important differentiators and decides to highlight them in his marketing campaigns.

Upon analyzing the Detractors’ responses, he identifies an alarming pattern. Most complaints are about the “difficulty of making returns.” The process was confusing, time-consuming, and required the customer to pay for return shipping. The CEO realizes this friction was creating furious customers. He immediately gathers his operations team and defines a new policy: free returns and a simplified process that can be initiated with a single click on the website.

Three months after implementing the change, they run the NPS survey again. The percentage of detractors drops from 15% to 5%. The new NPS rises to 55. The company not only improved its metric but used NPS feedback to identify and fix a serious flaw in its operation, transforming detractors into potentially satisfied customers and strengthening the business long-term.