Net Promoter Score (NPS)

What is Net Promoter Score (NPS)?

Net Promoter Score (NPS) measures how loyal your guests feel toward your brand, using a single question: "On a scale of 0 to 10, how likely are you to recommend us to a friend or colleague?"

The answers are grouped into promoters, passives and detractors. Your score is the share of promoters minus the share of detractors, which produces a number between -100 and +100.

NPS is used in almost every consumer industry, from restaurants and hotels to banking and software. Much of its appeal comes from its simplicity: one question that guests answer in seconds, and one number you can track over time and compare between locations.

For restaurant brands, NPS usually sits alongside other restaurant performance metrics such as sales, ticket times and online ratings. The open-text question that follows the score matters just as much, because it explains why guests answered the way they did.

How to calculate NPS

Every answer from 0 to 10 falls into one of three groups:

The score is then calculated as:

NPS = (promoters ÷ total responses × 100) − (detractors ÷ total responses × 100)

Passives are included in the total number of responses while belonging to neither group. As a result, a high share of passives keeps your score closer to zero. Bain & Company's own guide to measuring your Net Promoter Score uses the same three groups and formula.

Suppose your restaurant receives 200 responses to a post-visit survey: 120 promoters, 50 passives and 30 detractors. Promoters make up 120 ÷ 200 = 60% and detractors 30 ÷ 200 = 15%, so your NPS is 60 − 15 = 45.

NPS is always reported as a whole number, without a percent sign.

The scale is deliberately demanding. Seven of the eleven answers count as detractors and only two as promoters, so a guest who gives you a 6, which many people would consider a pass mark, lowers your score.

NPS calculator

Enter how many guests gave each answer. You'll see your score, its rating band and its margin of error at 95% confidence.

NPS margin of error and sample size

Your NPS is based on the guests who answered the survey, which makes it an estimate of how all your guests feel. Like any estimate, it comes with a margin of error.

If each answer is scored as +1 (promoter), 0 (passive) or −1 (detractor), NPS is simply the average of those values. That gives a 95% margin of error of approximately:

margin of error ≈ 1.96 × √( (p + d − (p − d)²) ÷ n ) × 100

Here p is your share of promoters, d your share of detractors and n your number of responses. In practice:

This is why a single location's monthly NPS can rise or fall by 10 or 15 points without any real change in the guest experience.

Before reacting to a movement, it helps to check whether it is larger than the margin of error. A rolling three-month average smooths out most of this noise.

An operator report that shows each location's response count next to its score makes it easier to tell a real shift from chance.

Types of NPS

Relational NPS

Relational NPS asks guests about your brand in general, independent of any particular visit. It is usually sent on a schedule, often quarterly or twice a year, to a broad group such as your loyalty members.

Because it reflects the overall health of the relationship, relational NPS is well suited to long-term trends and board-level reporting.

Transactional NPS

Transactional NPS, sometimes called touchpoint NPS, is sent right after a specific interaction: a dine-in visit, a delivery order, a catering event or a conversation with your support team.

Each response is tied to a location, date, channel and order, so it points you directly to what needs attention. Most multi-location restaurant brands rely mainly on transactional NPS for this reason.

A post-order survey workflow is a common way to send transactional NPS automatically after online and delivery orders.

Employee NPS (eNPS)

Employee NPS asks your team a similar question: "How likely are you to recommend this company as a place to work?" It is calculated in exactly the same way.

In hospitality, your front-of-house team shapes the guest experience on every shift, which is why many brands track eNPS alongside guest NPS.

How to run an NPS survey

A few practical choices shape how many guests answer your NPS survey and how useful their answers are.

Timing of the NPS survey

Surveys sent soon after the experience, ideally the same day or the next morning, tend to produce the most accurate answers.

Details such as wait times or food temperature fade quickly from memory, and response rates also decline as the delay grows. Timing and survey length together shape how many guests actually answer.

NPS survey channels

Whatever mix of channels you use, bringing every response into a unified inbox alongside your reviews and messages means each comment reaches the team that can act on it.

Wording the NPS question

Keeping the standard wording, "How likely are you to recommend [brand] to a friend or colleague?", keeps your results comparable over time and with other studies.

For restaurants, "to a friend or family member" is a common and natural variation. Showing all 11 points from 0 to 10, with the ends labeled "Not at all likely" and "Extremely likely", makes the scale clear.

A short survey that pairs the NPS question with one or two other restaurant survey questions, about food, service or speed, adds detail while keeping the survey quick to finish.

The NPS follow-up question

The open question that follows the score, such as "What's the main reason for your score?", is where most of the insight comes from. For detractors, "What could we have done better?" tends to draw out specific, actionable answers.

Once you are collecting hundreds of comments, sentiment analysis helps you group them into clear themes.

Context to attach to every NPS response

Recording the location, channel (dine-in, takeaway, delivery, catering), daypart, date, order value and, where possible, the items ordered makes every response traceable.

With that context in place, operational insights can trace a drop in your score to a specific location, shift or channel.

How to interpret your NPS

NPS rating bands

Many survey providers use the following rule of thumb:

These bands are a convention shared by survey providers. Scores vary widely by country, industry, channel and survey method, so published industry averages are best treated with caution.

Comparing NPS across your locations

NPS is most informative when you compare your own locations, measured in the same way.

A location 20 points below your brand average with a few hundred responses has a genuine gap to close. A location 8 points below with 30 responses may simply reflect chance. The comments from your weaker locations usually reveal whether the same themes keep recurring.

An operator report that lists each location's score, response count and top themes side by side makes these comparisons part of your weekly routine.

Watching your NPS trend

The direction of your score over several months is more meaningful than week-to-week movement.

Marking operational changes on the timeline, such as a new menu, staffing changes, a refurbishment or a new delivery partner, makes it much easier to see their effect. Pairing NPS with sales and other restaurant data analytics shows whether a change in score comes with a change in visits.

Criticism and limitations of NPS

NPS is widely used, and it also has well-documented weaknesses:

• Predictive power. Academic studies, notably Keiningham and colleagues in the Journal of Marketing (2007), found that NPS predicted company growth no better than other satisfaction and loyalty measures, such as the American Customer Satisfaction Index.
• Lost detail. Grouping an 11-point scale into three categories discards information. A guest moving from 0 to 6 leaves the score unchanged.
• Cultural differences. In some countries people rarely give top marks on any scale, which makes cross-country comparisons misleading.
• Fit with everyday purchases. Guests may love a neighborhood spot and still rarely "recommend" it, so the question can work less well for frequent, low-involvement visits.
• Vulnerability to gaming. Asking for a 10, surveying only happy guests or tying bonuses to the score can all raise NPS without improving the experience.

Most practitioners address these concerns by treating NPS as one signal among several, always reading it alongside the comments, and focusing on trends and differences between locations.

NPS vs. other CX metrics

Each metric answers a different question. NPS tracks loyalty, CSAT highlights touchpoint problems, and CES shows how easy you make it to order, book or get help. Your public star rating, the focus of restaurant reputation management, reflects how all of this appears to someone who hasn't visited yet.

How to improve your NPS

Improving NPS usually comes down to responding well to unhappy guests and steadily removing the causes of their frustration.

1. Following up with detractors quickly. Reaching out to unhappy guests within a day, acknowledging the specific problem and offering to put it right can turn a detractor into a regular.
2. Addressing the most common reasons first. Grouping comments by theme, such as wait times, food temperature, order accuracy, staff friendliness or value, reveals which issue affects the most guests.
3. Giving every location its own results. Managers improve what they can see, so weekly scores and comments for each location tend to drive more change than a brand-wide average.
4. Learning from your best locations. Comparing what promoters praise at your strongest locations with what detractors mention at your weakest often shows which practices are worth spreading across the brand.
5. Moving passives toward promotion. Passives are satisfied but not excited. Recognizing regulars, consistent quality and a personal follow-up are often enough to move them up and retain them as customers.
6. Inviting promoters to share their experience. Guests who score 9 or 10 are the most likely to leave positive public reviews, which strengthens your online reputation. Inviting every guest in the same way keeps you within platform rules on review requests.

Best NPS tools for restaurants

When choosing an NPS tool, the most important considerations are how surveys reach your guests (receipts, SMS, email, apps), whether results can be broken down by location and channel, and how easily comments flow to the teams who can act on them.

Each of these tools takes a slightly different approach, so it is worth comparing them against your own channels, number of locations and reporting needs before committing.

Common NPS mistakes

• Reporting the score without the comments. The number alone rarely explains what to change.
• Reacting to noise. Small samples move considerably by chance, so the margin of error is worth checking first.
• Changing the question or scale. Even small wording changes make earlier and later scores incomparable.
• Surveying only some guests. Sending surveys only after "good" visits, or only to loyalty members, inflates the score.
• Tying bonuses directly to the score. Direct incentives tend to encourage score requests at the table, which hides real problems.
• Overlooking passives. They are often your largest group and the easiest to win over.

History of NPS

NPS was introduced by Fred Reichheld, a partner at the consultancy Bain & Company, in the December 2003 Harvard Business Review article "The One Number You Need to Grow".

Reichheld's team tested a range of survey questions against what customers actually did afterwards. They reported that "likely to recommend" was the best single predictor of repeat purchases and referrals in most of the industries they studied.

He developed the idea further in his book The Ultimate Question (2006) and its second edition, The Ultimate Question 2.0 (2011, with Rob Markey). Together they describe the wider Net Promoter System, which pairs the score with a routine of collecting feedback, following up with customers and fixing root causes.

In 2021, Reichheld, Darci Darnell and Maureen Burns published "Net Promoter 3.0" in Harvard Business Review. The article introduced Earned Growth Rate, which measures how much of a company's revenue growth comes from returning customers and their referrals.

The same three authors developed these ideas further in their 2021 book Winning on Purpose, published by Harvard Business Review Press.

Net Promoter, NPS and Net Promoter Score are registered trademarks of Bain & Company, NICE Systems (which acquired Bain's original partner, Satmetrix) and Fred Reichheld.