Net Promoter Score (NPS): the one question that measures if people recommend you
A single question can tell you more about your business's health than ten long surveys. Here is how NPS works and how to use it without overcomplicating things.
If you could ask your clients just one question, which would it be? More than twenty years ago, a consultant named Fred Reichheld asked himself exactly that, and the answer he arrived at changed how thousands of companies measure success. He called it the Net Promoter Score, or NPS, and the best part is that any small business can use it.
Where it comes from
The idea became famous in 2003, with a Reichheld article in Harvard Business Review titled "The One Number You Need to Grow". Reichheld, together with the consulting firm Bain & Company, tested many different questions to predict whether a customer would return and recommend a business. Things like "how satisfied are you?" or "do you intend to return?".
The finding was striking: the question that best predicted real growth wasn't any of those, but one that was far more direct.
How likely are you to recommend this business to a friend or colleague? That single question turned out to be the best indicator that a customer would come back and speak well of you.
It makes sense. Recommending someone puts your own reputation on the line. Nobody casually recommends a dentist, a barbershop, or a real estate agent. That's why this question separates the truly happy clients from the ones who merely survived the experience.
How it works, in plain terms
You ask the client to answer on a scale from 0 to 10. Based on their answer, they fall into one of three groups:
- Promoters (9 to 10): your fans. They come back and actively recommend you.
- Passives (7 to 8): happy but lukewarm. They won't badmouth you, but they won't promote you either, and they'll leave for a competitor if they find something better.
- Detractors (0 to 6): dissatisfied clients who can hurt your reputation with negative word of mouth.
The math is easy: take the percentage of promoters and subtract the percentage of detractors. The passives don't count. For example, if 50% are promoters and 10% are detractors, your NPS is 40. The result ranges from -100 (all detractors) to 100 (all promoters).
Why it suits a small business
Long surveys scare people off, and almost nobody finishes them. NPS, on the other hand, is a single question anyone answers in seconds. That means you'll get far more responses, and therefore a more honest picture of how people see you.
Today it's used by two-thirds of the largest thousand companies in the United States, but its real power is in its simplicity. You don't need an analytics department: you need to send one question and know how to read the result.
The number isn't the point, the second question is
Here's the mistake a lot of people make: obsessing over the score and forgetting what comes next. The real value shows up when, right after the number, you ask "why?". That open question tells you what to fix with detractors and what to celebrate with promoters.
A detractor who explains what went wrong is handing you a map to improve. A promoter who tells you what they loved is showing you where to put your energy. The number tells you how you're doing; the second question tells you what to do.
How to start this week
You don't need expensive software. After each appointment or purchase, send a short message: "On a scale of 0 to 10, how likely are you to recommend us? And if you'd like, tell us why." If your customer care lives in WhatsApp, an assistant like Lidia can send that question automatically when each service wraps up and gather the answers for you.
The takeaway: NPS is powerful precisely because it's simple. One question from 0 to 10, an open "why?", and the discipline to act on what people tell you. Don't chase the perfect number; chase the clients who gave you a 6 and turn them into a 9. That's where growth lives.
Sources
- Bain & Company — https://www.bain.com/insights/net-promoter-3-0/
- Net Promoter Score (Wikipedia) — https://en.wikipedia.org/wiki/Net_promoter_score
- Qualtrics — https://www.qualtrics.com/articles/customer-experience/net-promoter-score/
- Hotjar — https://www.hotjar.com/net-promoter-score/