What Is The Net Promoter Score And Why It Matters

Updated October 2026 · reviewed for today

In short

The Net Promoter Score (NPS) asks customers how likely they are to recommend a company on a 0-10 scale, then subtracts the share of detractors (0-6) from the share of promoters (9-10). Fred Reichheld of Bain & Company introduced it in the December 2003 Harvard Business Review article “The One Number You Need to Grow”.

Net Promoter®, NPS® and Net Promoter Score® are registered trademarks of Bain & Company, NICE Satmetrix and Fred Reichheld; FourWeekMBA is not affiliated with or endorsed by them; this page is an independent explanation of the published model.

Table of Contents

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How it works

01

Ask one question

Customers rate their likelihood to recommend on a zero-to-ten scale.

02

Group the answers

Promoters score 9 or 10, passives 7 or 8, detractors 0 to 6.

03

Compute the score

NPS is the percentage of promoters minus the percentage of detractors; passives count only in the total.

04

Close the loop

Ask why, and route detractor feedback to the teams that can fix the cause.

Where you see it today

Reading every comment with AI

Language models can now sort thousands of open-text survey answers by theme and sentiment in minutes. That shifts the value of an NPS programme from the score to the reasons behind it.

Survey answers may not be human

A 2023 study re-ran a text summarisation task on Amazon Mechanical Turk and estimated that 33-46% of crowd workers used language models to complete it (Veselovsky et al., 2023). Open-text feedback gathered through paid panels can now be partly machine-written, so data checks matter more.

From score to earned growth

Reichheld and colleagues wrote that NPS had been gamed and misused, and that unaudited, self-reported scores undermined it (Reichheld et al., 2021). They proposed earned growth, which tracks how much revenue comes from customers won by referral, as an accounting-based complement.

The evidence debate

A longitudinal study using Norwegian customer data could not replicate the claimed clear superiority of NPS over other loyalty measures in predicting growth (Keiningham et al., 2007). Treat NPS as one useful signal, not a proven predictor.

NPS vs other customer metrics

Net Promoter Score

What it measuresWillingness to recommend

Watch out forGaming, small samples, cultural scoring differences

Customer satisfaction (CSAT)

What it measuresSatisfaction with a recent interaction

Watch out forMeasures a moment, not loyalty

Customer lifetime value

What it measuresRevenue expected from a customer over time

Watch out forDepends on retention assumptions

Earned growth

What it measuresRevenue growth from returning and referred customers

Watch out forNeeds referral tracking in accounting data

Retention rate

What it measuresShare of customers who stay

Watch out forLags the causes of churn

How to use it

• Always pair the 0-10 question with an open "why" question.
• Use AI to cluster the reasons, then read a sample of raw comments yourself.
• Track NPS by segment and touchpoint, not only as one company-wide number.
• Do not tie bonuses to the score; it invites gaming.
• Check NPS against hard data such as retention, referrals and revenue.

The Business Engineer lens

AI makes the text behind the score cheap to read, so the advantage moves from collecting a number to acting on the reasons. The Business Engineer treats feedback as a signal pipeline, where the work is separating real customer signal from noise and vanity metrics.

Read: Signal vs. Noise for Product Feedback Loops →Explore the platform →

Related: Customer satisfaction score · Customer lifetime value · Word-of-mouth marketing · North star metric · Goodhart's law

Frequently asked questions

How is the Net Promoter Score calculated?

Subtract the percentage of detractors (scores 0-6) from the percentage of promoters (scores 9-10); passives (7-8) are left out of the subtraction.

Who created the Net Promoter Score?

Fred Reichheld of Bain & Company introduced it in Harvard Business Review in December 2003.

Does NPS predict growth?

The evidence is mixed: a 2007 study failed to replicate the claim that it beats other loyalty measures, so it works best alongside hard data.

How can AI improve NPS programmes?

AI can classify open-text answers at scale, so teams can see why customers score as they do and act on the causes.

Sources

• Frederick F. Reichheld (2003), The One Number You Need to Grow, Harvard Business Review
• Bain & Company, Measuring Your Net Promoter Score, Net Promoter System
• Reichheld, Darnell and Burns (2021), Net Promoter 3.0, Harvard Business Review
• Keiningham, Cooil, Andreassen and Aksoy (2007), A Longitudinal Examination of Net Promoter and Firm Revenue Growth, Journal of Marketing
• Veselovsky, Ribeiro and West (2023), Artificial Artificial Artificial Intelligence: Crowd Workers Widely Use Large Language Models for Text Production Tasks, arXiv

The full guide

The complete explainer, cleaned up and reformatted for mobile.

The Net Promoter Score (NPS) is a measure of the ability of a product or service to attract word-of-mouth advertising. NPS is a crucial part of any marketing strategy since attracting and then retaining customers means they are more likely to recommend a business to others.

Why does the Net Promoter Score matter?

While the old adage of “the customer is always right” may be somewhat outdated now, there is no denying that customer satisfaction is the ultimate benchmark of successful businesses.

Especially in the era of customer obsession.

Word of mouth (viral engine) is very powerful, and among the engines of growth, and the Net Promoter Score is one of those simple, yet powerful metrics to measure that.

How is the Net Promoter Score calculated?

A survey is usually offered to customers to gauge their willingness to recommend products or services to others on a scale of 1-10. Depending on the results of that survey, the customers will fall into these three categories:

Promoters

Loyal customers who score either a 9 or a 10 are your biggest fans and will happily tell others about their buying experience.

Passives

Satisfied customers who score a 7 or 8 but who are not enthusiastic enough to tell others. Passives may be indifferent to repeat buying and could switch to a competitor.

Detractors

Unsatisfied customers who score between 0 and 6. Detractors are likely to share bad experiences with their friends and family and so are damaging to your brand.

How do you compute the Net Promoter Score?

The NPS score, then, is simply the percentage of promoters minus the percentage of detractors.

Any score above 0 is considered a pass mark because there are more promoters than detractors.

However, the companies that experience the most growth will have scores in the range of 50-80.

Businesses can tap into this growth by incorporating NPS data into their marketing strategies.

Here are some of the benefits of doing so.

Case study: Imagine you asked 100 people to score your software. Of those, 30 were detractors, 30 passives, and 40 promoters.

Your net promoter score will be 10 (40 promoters – 30 detractors).

Clarifies customer satisfaction and marketing liabilities

Let’s face it; every business likes to think that it offers the best products in the world.

But is this reflected in reality?

The Net Promoter Score is a good way to find out because it compares the perceived level of customer satisfaction with the actual level.

If a difference of opinion exists between the marketing department and the customer, then the NPS will quickly identify where it exists.

These gaps often exist because of marketing liabilities such as

• Advertising claims that don’t live up to consumer expectations of reality.
• Product defects, weaknesses, or flaws.
• Improper or incomplete usage instructions.

The NPS allows your business to clarify where its marketing strategy is falling short.

Furthermore, it allows certain shortcomings to be rectified that have the potential to cause customer dissatisfaction and hurt the brand image.

Encourages employee investment and provides a relevant benchmark

Firstly, the NPS is easy to understand.

From the survey results, every member of the marketing department will be clear on what they are doing right and what still needs improvement. 

A high NPS not only increases customer satisfaction, but it also increases employee engagement.

Multiple studies have shown that engagement, or the emotional commitment an employee has to their employer, produces marketing campaigns that result in higher and repeated sales.

Secondly, the NPS is a universal benchmark.

It allows you to compare your efforts with publicly available data in your niche and also from your competitors.

NPS data also provides marketing teams with tangible information that they can use to demonstrate progress to clients and stakeholders associated with the company.

Fuels organic growth by identifying loyal customers

When businesses receive the results of their NPS surveys, the temptation may be to focus on customers who fall into the passive and detractor categories. 

However, it is important not to overlook the promoter category.

Research by Nielsen found that over 70% of study participants were more likely to buy a product if a friend mentioned it through email or social media.

A Harvard Business Review study also found that customers referred through word of mouth were worth 16% more in dollar terms than those who found a business through other channels.

Why are promoters so important?

There are several reasons:

Promoters fuel organic growth of your business through brand advocacy

To some extent, they become your marketing department.

They are more than happy to spread the word about your business for free.

Focus

Promoters allow your marketing strategy to focus on what matters and build a sustainable business model

By understanding what promoters love about your brand specifically, you gain clarity on what sort of marketing is most effective at recruiting new customers.

They spend more

Research by RJMetrics also suggests that promoters spend 30 times more money on your products than the once-off buyer.

Thus, developing marketing strategies that keep promoters happily engaged is important.

Loyalty programs, discounts on future purchases, and incentives for spreading the word are examples of effective strategies.

Allows your marketing strategy to be trackable

It might seem obvious, but you cannot improve what you cannot track. 

The most effective marketing strategies are backed up by hard data.

Tracking your Net Promoter Score allows the marketing team to refine their strategies based on how well certain changes are received.

With this feedback, they can devote more resources to strategies that work and less to those that do not.

So that you can build a viable business model, quickly.

Regular tracking also allows trends and seasonal changes to be identified quickly.

Technology, for example, is constantly evolving and some consumers will inevitably become passive or unsatisfied customers if they are left with outdated products.

Passive customers, as we have learned, are indifferent to your products and can be lost to competitors easily.

Since it is much easier to retain existing customers than it is to recruit new ones, marketing efforts must be directed toward converting passives into promoters.

Here, NPS survey data is invaluable.

It enables businesses to refine their products and associated marketing strategies.

Such strategies become more flexible to current trends and stand a better chance of retaining customers who might be potentially lost forever.

The net promoter score in the growth hacking context

The next promoter score is an important metric also in the context of growth hacking.

In short, in the growth hacking process, there are two elements which are crucial to develop a growth strategy — as explored in the emerging fifth paradigm of scaling — :

• The “aha experience.”
• And the must-have product.

The “aha experience” represents the moment in which users or potential customers realize the full potential of your product.

This is critical, as no growth strategy can be built on a mediocre product.

From there, it’s critical to understand whether your product is a must-have.

In short, how much would people be disappointed if your product were withdrawn from the market tomorrow?

From there, the net promoter score helps grasp how much built-in viral growth the product has, and therefore you have the basis to push as much as possible!

Case Studies

Key takeaways

• Considering the ease with which NPS data can be collated, the benefits of using it to deliver marketing strategies are tremendous.
• NPS data clarifies customer satisfaction and addresses gaps in a marketing message or product development.
• NPS data is also easy to digest, increasing buy-in across different departments and increasing employee engagement.
• It also provides a relevant benchmark that businesses can use to judge their efforts against others in their industry.
• Perhaps most importantly, it allows businesses to devote their resources to where it matters most – their promoters.
• Businesses with effective marketing departments understand that promoters are enthusiastic brand evangelists.
• They offer a low-cost, high-profit opportunity for growth and by tracking the relative proportion of promoters over time, businesses can stay one step ahead of trends and prevent brand desertion before it occurs.

Key Highlights on Net Promoter Score (NPS)

NPS Definition and Importance

• The Net Promoter Score (NPS) measures a product or service’s ability to attract word-of-mouth advertising.
• Customer satisfaction is a key benchmark for successful businesses.
• Word-of-mouth is a powerful growth engine, and NPS is a simple yet effective metric to measure it.

Calculation of NPS

• Customers are surveyed to determine their willingness to recommend products/services on a scale of 1-10.
• Three categories: Promoters (9-10), Passives (7-8), Detractors (0-6).
• NPS is calculated as the percentage of promoters minus the percentage of detractors.
• A positive score indicates more promoters than detractors, and scores in the range of 50-80 are considered highly growth-oriented.

Benefits of NPS in Marketing Strategy

• Clarifies Customer Satisfaction and Marketing Liabilities:
  • Compares perceived and actual customer satisfaction.
  • Identifies gaps caused by marketing claims, product issues, or improper usage instructions.
  • Helps rectify shortcomings that could damage brand image.
• Encourages Employee Investment and Provides a Benchmark:
  • Easy-to-understand metric for marketing teams.
  • High NPS boosts both customer satisfaction and employee engagement.
  • Provides a universal benchmark for industry and competitor comparison.
• Fuels Organic Growth by Identifying Loyal Customers:
  • Focusing on promoters is important for organic growth.
  • Word-of-mouth referrals are valuable; referrals spend more and bring higher value.
  • Promoters become brand advocates and spread positive word-of-mouth.
• Allows Tracking and Refinement of Marketing Strategies:
  • Data-backed marketing strategies are effective.
  • Regular tracking refines strategies based on feedback.
  • Enables identification of trends and seasonal changes for quick adaptation.
• Improves Focus and Retention of Existing Customers:
  • Helps in converting passives into promoters.
  • Retaining customers is easier and more cost-effective than acquiring new ones.
  • NPS survey data refines products and marketing strategies, retaining potentially lost customers.
• NPS in Growth Hacking Context:
  • NPS plays a role in growth hacking by understanding the “aha experience” and product’s must-have nature.
  • Identifies viral growth potential and informs growth strategies.