What is Net Promoter Score?
Net Promoter Score was introduced by Fred Reichheld in a 2003 Harvard Business Review article. It measures customer loyalty with one question: how likely are you to recommend us on a scale of 0 to 10? The simplicity of the question is its strength. It is easy to deploy, easy to answer, and easy to track over time.
Respondents fall into three groups. Promoters (9-10) are loyal enthusiasts who will keep buying and refer others. Passives (7-8) are satisfied but unenthusiastic. They are vulnerable to competitive offers. Detractors (0-6) are unhappy users who can damage your brand through negative word of mouth.
The NPS formula is straightforward: subtract the percentage of detractors from the percentage of promoters. If 60% of respondents are promoters and 20% are detractors, your NPS is 40. Passives are not included in the calculation but still matter for overall customer health.
Why NPS Matters for Product Teams
NPS gives product teams a longitudinal measure of customer sentiment. Tracking NPS over time reveals whether product changes are improving or degrading the user experience. A rising NPS after a major release confirms you built the right thing. A declining NPS is an early warning that something needs attention.
The follow-up question is where NPS becomes actionable. After the numerical score, ask "what is the primary reason for your score?" The open-ended responses reveal specific product issues, missing features, and unmet needs that the number alone cannot communicate.
NPS also segments your user base. Promoters are candidates for case studies, referrals, and beta programs. Detractors need immediate outreach to understand and resolve their issues before they churn. This segmentation helps teams allocate attention where it has the most impact.
How to Use NPS Effectively
Send NPS surveys at consistent intervals, typically quarterly. Avoid surveying after positive events like a successful onboarding because it inflates scores. You want a representative sample of your user base, not a cherry-picked one.
Always include a follow-up question. The score tells you how users feel. The follow-up tells you why. Analyze the text responses for patterns, then feed those patterns into your product prioritization process.
Combine NPS with other feedback channels. NPS captures sentiment at a single point in time. A feedback board captures ongoing demand signals. Together, they give you both the temperature of your user base and the specific actions that would raise it.
Act on detractor feedback quickly. Reach out to detractors personally when possible. Understand their issues and demonstrate that you are working on them. Converting a detractor into a promoter has outsized impact on both your score and your retention rate.