Net Promoter Score (NPS)
A customer loyalty metric based on asking customers how likely they are to recommend your product on a 0-10 scale. High NPS correlates with strong referral potential — promoters (9-10) are natural candidates for your affiliate or referral program.
Net Promoter Score Fundamentals
Net Promoter Score (NPS) measures customer loyalty and willingness to recommend a product. It rests on a single survey question: 'How likely are you to recommend this product?' answered on a 0-10 scale.
Responses fall into three categories:
- Detractors: 0-6
- Passives: 7-8
- Promoters: 9-10
NPS equals the percentage of promoters minus the percentage of detractors, so the score ranges from -100 to +100. NPS is critical for SaaS because customers willing to refer friends become natural affiliates. High-NPS companies achieve 2-3x more organic referrals than low-NPS companies.
How to Calculate NPS
Take a survey of 100 customers made up of 60 promoters, 20 passives, and 20 detractors. NPS is 60% minus 20%, which equals 40.
Calculate NPS quarterly and track trends over time. Increasing NPS indicates improving product satisfaction and referral potential, while declining NPS signals customer satisfaction issues requiring attention.
NPS Benchmarks
Typical benchmark scores for SaaS companies:
- SaaS average: 30-50
- Strong SaaS: 50+
- Exceptional SaaS: 70+
A negative NPS (below 0) indicates more detractors than promoters, a concerning indicator for growth. NPS above 50 indicates strong referral potential.
NPS also varies by segment. Enterprise customers often score higher than SMB customers due to better support and deeper integration.
NPS and Affiliate Program Health
NPS directly predicts affiliate program success, because customers rating 9-10 become natural referrers. Identify promoters in your customer base and invite them into the affiliate program: they already recommend you, and the program formalizes and incentivizes that behavior.
High-NPS customer cohorts generate 3-4x more referrals than low-NPS cohorts even with identical commission rates. Measure NPS by customer acquisition source and compare affiliate-sourced customer NPS against paid acquisition. Affiliate-sourced customers often score higher due to better fit and pre-sales credibility.
Use NPS data to identify detractors, then follow up to understand their dissatisfaction. Reducing detractors strengthens the affiliate program by improving overall customer quality.
Make improving NPS an organizational priority: it drives both retention and affiliate recruitment simultaneously. Target 50+ NPS for a healthy SaaS company with strong affiliate potential. Most SaaS companies at 50+ NPS achieve 15-25% of new customers from affiliate referrals.