What is Net Promoter Score (NPS)?
Net Promoter Score (NPS) is a customer loyalty metric calculated from a single survey question: “On a scale of 0 to 10, how likely are you to recommend [Company/Product] to a friend or colleague?” Respondents are classified into Promoters (9-10), Passives (7-8), and Detractors (0-6).
Formula
NPS = % Promoters – % Detractors
Range: -100 to +100. Above 0 = more promoters than detractors. Above 50 = excellent. Above 70 = world-class (Apple, Costco, Tesla territory).
Relational vs Transactional NPS
- Relational NPS: Quarterly/annual survey to your full customer base; measures overall sentiment
- Transactional NPS (tNPS): Survey triggered after a specific event (purchase, support ticket close, onboarding); measures sentiment about that interaction
Industry benchmarks (B2B SaaS, 2025)
- Below 0: At risk — most customers would actively recommend AGAINST you
- 0–30: Needs improvement
- 30–50: Healthy
- 50–70: Strong
- 70+: Industry-leading
Pitfalls
- Single-question = limited diagnostic insight; always add “Why?” follow-up
- Sample bias — only happy/angry users respond
- Cultural variance — same satisfaction yields different scores by region
- Gaming risk — tying executive bonuses to NPS encourages survey manipulation
Practical implications
Track NPS quarterly + transactional NPS at key touchpoints. In an investor pitch, NPS is a credibility signal — but only if you also report sample size, response rate, and methodology. A “60 NPS from 12 respondents” is meaningless.
NPS in contracts and claims
NPS migrates into legal documents more than any other satisfaction metric: SLA bonus/malus schemes, earn-out components, partnership QBR thresholds. Drafting around it requires respecting its mechanics — survey methodology (scale, sampling, channel) must be fixed contractually, because methodology moves scores more than performance does; minimum response volumes belong in the clause (an NPS computed on nine answers is noise); and gaming controls (survey timing, segment exclusion) need to be auditable. In marketing, quoted scores and “#1 rated” claims derived from NPS sit under comparative-advertising substantiation rules. The honest contractual use is trend-based: obligations triggered by sustained deltas against a baseline rather than absolute scores imported from another industry’s benchmark.
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