NPS — Net Promoter Score
Definition, calculation, interpretation and African market specificities — the complete guide by IMMAR, Customer Experience specialist since 1999.
Definition
The Net Promoter Score (NPS) is a customer loyalty indicator developed by Fred Reichheld and Bain & Company. It is based on a single question: "How likely are you to recommend [brand/company] to a friend or colleague?" Responses on a 0–10 scale are used to calculate a score that summarises the loyalty profile of a customer portfolio.
NPS calculation
Respondents are classified into three groups according to their score:
| Category | Score | Profile |
|---|---|---|
| Promoters | 9 – 10 | Loyal customers, active ambassadors, likely to recommend |
| Passives | 7 – 8 | Satisfied but not enthusiastic, vulnerable to competitor offers |
| Detractors | 0 – 6 | Dissatisfied, potentially harmful to brand reputation |
Formula: NPS = % Promoters − % Detractors
The NPS can range from −100 (all detractors) to +100 (all promoters). Passives are excluded from the calculation but monitored as a potential conversion lever.
NPS in African markets: specific considerations
Interpreting NPS in African and Mediterranean markets requires market-specific calibration:
- Response scale bias — in certain cultural contexts, extreme response tendencies (high scores by courtesy or low scores by distrust) can distort raw NPS values. Calibration against local benchmarks is essential.
- Sectoral benchmarks — NPS reference values differ significantly between telecoms, banking, FMCG and public services in African markets
- Collection channel — face-to-face (CAPI) and telephone (CATI) collection can produce different NPS distributions from online collection for the same brand on the same market
NPS, CSAT and CES: which indicator for which need?
| Indicator | What it measures | When to use it |
|---|---|---|
| NPS | Loyalty and recommendation intention | Strategic vision, portfolio health, longitudinal tracking |
| CSAT | Satisfaction with a specific interaction | After a purchase, call, repair, or service touchpoint |
| CES | Ease of customer interaction | After a support interaction, self-service journey, or app use |
Looking to deploy an NPS tracking programme across your African or Mediterranean markets?
Talk to an IMMAR expertFrequently asked questions
What is the Net Promoter Score (NPS)?
The NPS is a customer loyalty indicator based on a single question: "How likely are you to recommend us?" Responses on a 0–10 scale classify customers as Promoters (9–10), Passives (7–8) or Detractors (0–6). NPS = % Promoters − % Detractors.
What is a good NPS score?
An NPS above 0 is positive, above 30 is good, above 50 is excellent. Benchmarks vary significantly by sector and cultural context. In African markets, local calibration is essential for meaningful interpretation.
What is the difference between NPS, CSAT and CES?
NPS measures loyalty and recommendation intention (long-term relationship). CSAT measures satisfaction with a specific interaction. CES measures the ease of a customer interaction. The three indicators are complementary: NPS for strategic vision, CSAT and CES for operational monitoring.
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