What Is Net Promoter Score (NPS)?
Net Promoter Score (NPS) is the most widely used customer loyalty and satisfaction metric in business. Developed by Fred Reichheld at Bain & Company and introduced in 2003, NPS asks one simple question: "How likely are you to recommend us to a friend or colleague?" Customers respond on a 0–10 scale, and the NPS is calculated from the difference between the percentage of Promoters and Detractors.
NPS has become ubiquitous in business because it is simple, predictive, and comparable across industries. Research by Bain & Company found that NPS is correlated with revenue growth in most industries — companies with higher NPS tend to grow faster than competitors. This makes NPS a useful leading indicator of future business performance, not just a lagging measure of past satisfaction.
Despite its simplicity, NPS is a powerful diagnostic tool. When combined with open-ended follow-up questions ("What is the primary reason for your score?"), NPS reveals the specific drivers of loyalty and dissatisfaction that management can act on.
The NPS Formula
NPS = % Promoters − % Detractors
Respondents are categorised based on their score:
- Promoters (9–10): Loyal enthusiasts who will keep buying and refer others, fuelling growth.
- Passives (7–8): Satisfied but not enthusiastic — vulnerable to competitive offers.
- Detractors (0–6): Unhappy customers who may spread negative word-of-mouth.
Example: 200 survey responses: 120 Promoters (60%), 50 Passives (25%), 30 Detractors (15%). NPS = 60 − 15 = 45. This is a "great" NPS by general benchmarks and strong for most industries.
Important: NPS is always a whole number between -100 and +100. Passives count toward the denominator (total respondents) but are excluded from the NPS calculation itself — they are not promoters or detractors.
NPS Benchmarks by Industry
Comparing your NPS against your industry is more meaningful than comparing against a generic scale. Different industries have structurally different NPS ranges due to customer expectations, service complexity, and switching costs.
- Consumer technology: 35–50. Apple NPS historically 60+. Top-quartile SaaS: 50+.
- Retail and eCommerce: 35–55. Amazon historically 55–65 in peak periods.
- Financial services: 15–35. Banks average 15–30; fintech disruptions often 40–60.
- Healthcare: 25–40. Significant variation between primary care and specialist services.
- Telecommunications: −10 to 20. One of the lowest NPS industries globally.
- B2B software / SaaS: 30–50. Enterprise buyers have higher expectations and complex needs.
- Professional services: 40–60. Strong personal relationships drive high promoter rates.
Transactional vs. Relationship NPS
There are two ways to deploy NPS surveys, each serving a different purpose:
Transactional NPS is triggered by a specific customer interaction: completing a purchase, closing a support ticket, finishing an onboarding session, or attending a training. It measures satisfaction with that specific touchpoint and allows you to identify friction points in your customer journey. Response rates are typically higher because the survey is contextually relevant.
Relationship NPS is sent on a time-based schedule (quarterly or semi-annually) to measure overall loyalty and satisfaction independent of any specific interaction. It provides a pulse check on the health of your customer relationships and is the version typically reported to leadership as a company-level KPI.
Best practice is to run both: relationship NPS for strategic tracking, transactional NPS for operational improvement of specific touchpoints.
How to Improve Your NPS
Close the loop with Detractors. Contact every Detractor within 24–48 hours of their survey response. A personalised outreach acknowledging their feedback and offering to resolve their issue converts a surprising number of Detractors into Passives or even Promoters — and prevents negative word-of-mouth from escalating. This is the single highest-impact NPS improvement action available to most businesses.
Identify the top detractor drivers. Analyse open-ended feedback from Detractors to find the top 3 themes driving low scores. Often, 60–70% of Detractor feedback clusters around 2–3 root causes: a product gap, a support experience, or a billing issue. Fix these systematically rather than case-by-case.
Activate your Promoters. Promoters are your best marketing asset — they just need a prompt. Ask Promoters for reviews on Google, G2, or Capterra. Invite them to referral programs, case study interviews, or community ambassador roles. Promoters who are engaged and asked tend to refer far more than those who are left to act spontaneously.
Improve onboarding. Many Detractors in SaaS are customers who never successfully activated the product. A structured, milestone-based onboarding that ensures every customer reaches their first key value moment within 14–30 days significantly reduces early-stage Detractor rates.
Track NPS cohorts over time. Rather than a single blended NPS, track NPS by customer cohort (month acquired), customer segment, and product plan. This reveals whether specific cohorts or segments have structurally lower loyalty — and points to root causes in acquisition quality, product fit, or service delivery for those segments.