Quick reference
Memory aid
One question: Would you recommend us? 9-10 = Promoters. 0-6 = Detractors. NPS = %P - %D.
TL;DR
Ask 'How likely are you to recommend us?' on a 0-10 scale. Calculate NPS = %Promoters - %Detractors. Follow up with 'Why?' Close the loop with detractors. Analyze patterns. Improve systematically.
What Is Net Promoter Score (NPS)?
Ask customers one question: 'On a scale of 0-10, how likely are you to recommend us?' Score 9-10 = Promoters (loyal enthusiasts). Score 7-8 = Passives (satisfied but unenthusiastic). Score 0-6 = Detractors (unhappy). NPS = % Promoters - % Detractors.
NPS is both a metric and a system. The metric provides a simple, comparable score. The system includes the follow-up: asking 'Why?' after the score, closing the loop with detractors, analyzing root causes, and driving organizational improvement. Bain & Company, where the metric was developed, reports that the NPS leader in a market grows on average more than twice as fast as its competitors, though independent researchers dispute how well NPS predicts growth. The true value is not the number itself but the organizational discipline of listening and responding to customer feedback.
NPS Score Classification
A 0-10 scale showing the three customer categories and how NPS is calculated.
Origin & context
Published in the Harvard Business Review article 'The One Number You Need to Grow.' Reichheld argued from his research at Bain that this single question was the strongest available predictor of growth — a claim that has been influential and contested in roughly equal measure.
Core Components
The Question
The core NPS question on a 0-10 scale.
Example
'How likely are you to recommend [Company] to a friend or colleague?'
Classification
Grouping respondents into Promoters (9-10), Passives (7-8), and Detractors (0-6).
Example
100 responses: 50 Promoters, 30 Passives, 20 Detractors. NPS = 50% - 20% = +30.
Follow-up Question
Asking 'Why?' to understand the reason behind the score.
Example
'What is the primary reason for your score?' — providing qualitative data for improvement.
Closed-Loop Process
Reaching out to detractors to understand and resolve their issues.
Example
A dedicated team contacts every detractor within 24 hours to understand their issue and attempt resolution.
Reichheld and the research firm Satmetrix tested standard customer survey questions against later customer behavior and company growth. The 'likelihood to recommend' question was the best or second-best predictor of growth in 11 of the 14 industries in Reichheld's data, while a question on overall satisfaction was not a significant predictor. Later independent studies have questioned whether NPS predicts growth better than other loyalty measures.
When to Use Net Promoter Score (NPS)
Customer loyalty tracking
Problem it solves: Provides a simple, comparable measure of customer loyalty over time.
Real-world application
Apple's retail stores use Net Promoter feedback that reaches store employees within hours of a visit. Teams discuss it in daily shift huddles, and follow-up calls with customers become coaching material for staff.
Customer retention improvement
Problem it solves: Identifies detractors before they churn and provides insights into why.
Real-world application
A SaaS company adopting closed-loop NPS has a customer success manager call every detractor within 48 hours, turning each low score into a chance to resolve the issue before the customer churns.
NPS without follow-up is just a number. The real value is in the 'Why?' and the closed-loop process. Every detractor contact is an opportunity to save a customer and learn about systemic issues.
How to Apply Net Promoter Score (NPS): Step by Step
Before you start
- →Customer contact database
- →Survey delivery mechanism
- →Process for acting on feedback
Design the Survey
Set up the NPS question with the follow-up 'Why?'
Tips
- ✓Keep it short — the NPS question plus one open-ended question is ideal
Common mistakes
- ✗Adding too many questions, reducing response rates
Deploy at Key Touchpoints
Send NPS surveys at strategic moments in the customer journey.
Tips
- ✓Relationship NPS (periodic) and transactional NPS (after interactions) serve different purposes
Common mistakes
- ✗Over-surveying — sending NPS too frequently causes fatigue
Close the Loop
Contact detractors to understand and address their concerns.
Tips
- ✓Respond within 24-48 hours while the experience is fresh
Common mistakes
- ✗Collecting NPS data without ever contacting detractors
Analyze and Act
Identify patterns in feedback and drive systematic improvements.
Tips
- ✓Categorize 'Why' responses to find the top themes
Common mistakes
- ✗Focusing on the score rather than the underlying feedback
Value & Outcomes
Primary benefit
Provides a simple, actionable measure of customer loyalty that predicts growth.
Additional benefits
- ✓Easy to benchmark across industries
- ✓Drives a discipline of listening and responding to customers
What you'll learn
- →How to measure customer loyalty simply and effectively
- →How to build a closed-loop customer feedback system
Typical outcomes
Best Practices
📋 Preparation
- •Define survey timing and cadence
- •Build the closed-loop process before launching
🚀 Execution
- •Keep the survey short
- •Close the loop with every detractor
🔄 Follow-Up
- •Track NPS trends over time, not just snapshots
- •Share NPS feedback across the organization
💎 Pro Tips
- •The most important metric isn't the NPS score — it's the percentage of detractors who become promoters after the closed-loop process
Don't game NPS by only surveying happy customers or coaching customers to give high scores. This defeats the purpose and creates a false sense of security.
USAA, the financial services company serving military members and their families, builds empathy for members into onboarding. New-hire orientation includes eating MREs (military field rations), reading deployment letters, and hearing from veterans who work at the company, so that employees learn to see their work through members' eyes.
Limitations & Pitfalls
A single score can oversimplify complex customer relationships
Mitigation: Use NPS alongside CSAT, CES, and qualitative research
Cultural differences affect how people use rating scales
Mitigation: Benchmark within regions/cultures rather than globally
Where this comes fromFred Reichheld / Bain & Company, in The One Number You Need to Grow (2003).
Sources & further reading
- Frederick F. Reichheld (2003). The One Number You Need to Grow. Harvard Business Review.The article's central claim — that likelihood-to-recommend is the strongest available predictor of growth — has been influential and contested.
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