NPS
Net Promoter Score (NPS) measures customer loyalty through a single question: "How likely are you to recommend this product or service to a friend or colleague?" Answers come on a 0–10 scale, and the score is the percentage of promoters minus the percentage of detractors. Introduced by Bain & Company and Fred Reichheld in 2003, it has become the standard customer experience metric worldwide.
Net Promoter Score (NPS) measures customer loyalty through a single question: "How likely are you to recommend this product or service to a friend or colleague?" Answers come on a 0–10 scale, and the score is the percentage of promoters minus the percentage of detractors. Introduced by Bain & Company and Fred Reichheld in 2003, it has become the standard customer experience metric worldwide.
Why It Matters
Bain research shows NPS leaders grow revenue 2–2.5x faster than industry averages. NPS has two advantages: a single-question format that's cheap to run, and a number that execs, marketing, and product teams all instantly understand. From an inbound marketing standpoint, a high NPS is a leading indicator of referral traffic, word-of-mouth expansion, and repeat purchases — the stamina metric of long-term growth.
How to Calculate NPS
Respondent segments:
- 9–10: Promoters — enthusiastic advocates
- 7–8: Passives — satisfied but not actively recommending
- 0–6: Detractors — unhappy customers
Formula: NPS = % Promoters − % Detractors
Example: 60 promoters, 30 passives, 10 detractors out of 100 → NPS = 60% − 10% = 50
Range: −100 to +100. Generally 30+ is "good," 50+ is "excellent," 70+ is "world-class."
Survey Design Tips
Timing: Right after users experience the core value. For SaaS, 2–4 weeks after onboarding; for e-commerce, 3–7 days after delivery.
Follow-up open question: Pair the score with "What's the main reason for that score?" The qualitative answer is what drives real improvement.
Segment analysis: Don't stop at overall NPS. Cut by plan, industry, and tenure to find which segment is dragging the score.
Regular measurement: At least quarterly. A single score is noise, but 3–4 quarters of trend data is a real signal.
Using NPS
Promoters: First-in-line for referral programs, case studies, and review requests. They already want to recommend you.
Passives: Most vulnerable to competitors with better offers. Moving them to promoters — through new value or onboarding fixes — is the biggest leverage point.
Detractors: Mine qualitative comments for recurring complaints. Use 1:1 recovery calls or free extensions to prevent churn and set product priorities.
Limitations
NPS has response bias issues and varies by cultural norms in how scores are given. Compressing experience into one number also hides detail. Use NPS alongside CSAT, CES, and qualitative feedback instead of as a standalone KPI.
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