Net Promoter Score
Definition
Net Promoter Score (NPS) is a widely adopted customer loyalty and satisfaction metric created by Fred Reichheld and Bain & Company. It measures customers' willingness to recommend a company, product, or service using a single question: 'On a scale of 0-10, how likely are you to recommend [company] to a friend or colleague?' Respondents are classified as Promoters (9-10), Passives (7-8), or Detractors (0-6). NPS is calculated as: (% Promoters) - (% Detractors). Scores range from -100 to +100; a score above 50 is considered excellent. NPS is typically collected at regular relationship intervals (quarterly) rather than after specific interactions.
Why It Matters
NPS is the de facto standard for measuring customer loyalty and predicting business growth. Because it correlates with customer referral behavior, NPS scores are leading indicators of revenue growth — companies with high NPS grow faster than competitors through word-of-mouth. NPS also provides strategic direction: qualitative follow-up questions reveal why customers give their score, identifying the most impactful improvement opportunities. For AI chatbot and support teams, NPS provides a long-term view of whether support quality is building or eroding customer loyalty over time.
How It Works
NPS surveys are distributed via email, in-app notification, or in-product modal at regular intervals — often quarterly or annually, or triggered by milestones like 90 days after signup or 30 days before renewal. The standard survey asks the numeric likelihood-to-recommend question, followed by an open-ended 'What is the primary reason for your score?' question. NPS software (Delighted, Promoter.io, or built-in CRM features) collects responses, calculates the score, and segments results by customer attribute. Follow-up workflows route Detractor responses to customer success managers for proactive outreach.
Net Promoter Score — Calculation & Benchmarks
How likely are you to recommend us? (0 = Not at all, 10 = Extremely likely)
Promoters
50%
Detractors
20%
NPS Score
+30
< 0
Needs improvement
0 – 30
Good
30 – 70
Great
70+
Excellent
Real-World Example
A 99helpers customer measures NPS quarterly and finds that their score drops from +34 to +18 after a major product update that changed the navigation structure. Detractor comments overwhelmingly mention difficulty finding features that were previously easy to access. The customer success team proactively reaches out to all Detractors offering personalized onboarding sessions for the new navigation. NPS recovers to +41 over the following quarter as customers adapt with the help of targeted support.
Common Mistakes
- ✕Treating NPS as an end in itself — the value of NPS comes from the follow-up actions triggered by the results, especially closing the loop with Detractors
- ✕Surveying too frequently — NPS fatigue sets in when customers are asked the same question every month; quarterly or semi-annual surveys are more appropriate
- ✕Not including an open-ended follow-up question — the numeric score tells you how customers feel; the qualitative response tells you why
Related Terms
Customer Satisfaction Score
Customer Satisfaction Score (CSAT) is a metric that measures how satisfied customers are with a specific interaction, product, or experience, typically collected through a simple post-interaction survey asking customers to rate their satisfaction on a numeric scale.
Customer Effort Score
Customer Effort Score (CES) measures how much effort a customer had to expend to resolve an issue or complete a task, using a simple survey question about the ease of their experience.
Customer Experience
Customer experience (CX) is the overall perception a customer forms from every interaction with a brand across the entire customer journey, from first awareness through purchase, onboarding, support, and renewal.
Voice of Customer
Voice of Customer (VoC) is a research process that captures customers' expectations, preferences, and aversions to provide qualitative and quantitative insights that drive product, service, and experience improvements.
Customer Churn
Customer churn is the rate at which customers stop using a product or service within a given period, representing lost revenue and a signal of unmet customer needs.
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