The NPS Scale Explained: 0-10, Promoters, Passives, and Detractors

What is the NPS scale?#

The NPS scale is the 0-to-10 rating scale a customer uses to answer the single Net Promoter Score question — "How likely are you to recommend us to a friend or colleague?" — where 0 means "not at all likely" and 10 means "extremely likely." It is an 11-point scale (every whole number from 0 through 10 is a valid answer) that sorts respondents into three fixed segments: promoters, passives, and detractors.

That segmentation is the entire point of the scale. On its own, a 0-10 rating is just a number. What makes it the NPS scale is the rule that collapses those eleven options into three behavioral groups and then turns the groups into one headline figure. For the full metric — definition, formula, and history — start with our guide to Net Promoter Score and the why behind the score.

Promoters, passives, and detractors explained#

The NPS scale divides every 0-10 answer into three segments — promoters (9-10), passives (7-8), and detractors (0-6) — grouped by how each set of customers tends to behave after they respond.

The uneven bucket sizes surprise most people. Only two of the eleven points count as a promoter, while a full seven (0 through 6) count as a detractor, and a 7 or 8 — which feels like a solid "B" on a report card — earns you nothing. The logic is behavioral, not arithmetic: Reichheld's research found that only customers scoring 9 or 10 repurchased and referred at rates high enough to drive growth, so the cut lines were drawn where behavior actually changed. For what these bands look like in practice, see our breakdown of what counts as a good NPS score by industry.

Why 0-10 and not 1-5 or 1-7?#

The 0-10 range was chosen because it produced the clearest behavioral separation between loyal and at-risk customers, and because starting at zero gives respondents an unambiguous "not at all likely" floor. Fred Reichheld, a partner at Bain & Company, introduced the metric in a 2003 Harvard Business Review article after testing eight candidate survey questions among roughly 4,000 consumers and matching their answers to actual repurchase and referral behavior across 14 case studies. The "would you recommend" question on an 11-point scale was the strongest or second-strongest predictor of that behavior in 11 of the 14 cases, per Reichheld's Harvard Business Review write-up.

Two design choices matter. The scale begins at 0 rather than 1, signaling that the low end means "no, not at all," and eleven points give enough granularity to spot the behavioral cliff between a 6 and a 9 without overwhelming respondents. Reichheld has acknowledged that "other scales seem to work" — citing Enterprise Rent-A-Car's 5-point system — but 0-10 became the convention precisely so scores stay comparable across companies and over time, as Bain & Company's Net Promoter System documentation explains. Switching to a 1-5 or 1-7 scale mid-program breaks that comparability. If you are weighing metrics with different scales, our comparison of CSAT formula, benchmarks, and limits shows how a 1-5 satisfaction scale behaves differently, and the full roster of customer experience metrics puts each scale side by side.

How the NPS scale maps to the NPS calculation#

The NPS scale maps to the score through a single subtraction: NPS = % of promoters − % of detractors, with passives counted in the response base but contributing nothing to the result.

Here is a worked example. Say 100 customers answer the recommend question:

• 50 score 9 or 10 → 50% promoters
• 30 score 7 or 8 → 30% passives
• 20 score 0 through 6 → 20% detractors

The math is 50% − 20% = an NPS of 30. The 30 passives never enter the equation directly; they only dilute the percentages by growing the denominator. Because the formula subtracts one percentage from another, the range runs from -100 (all detractors) to +100 (all promoters), and NPS is always reported as a whole number, never a percentage. For the full step-by-step method — including the mistakes that quietly inflate or deflate the number — see how to calculate your NPS score.

Passives are invisible in the headline number, and that has consequences. A company can convert detractors into passives — a real improvement — and watch its NPS climb, or slip promoters into passive territory and watch it fall, all without a single customer defecting. That is why the score should never be read without its underlying distribution, and why the open-ended follow-up on an NPS survey does more work than the rating itself.

The limits of the 11-point scale#

The biggest limitation of the 11-point scale is that it records where a customer lands without recording why they landed there. The scale is exceptional at bucketing people and useless at explaining them.

Consider two customers who both give you a 4. One is furious about a billing error support never resolved; the other loves the product but finds it too expensive. Both are detractors, both count identically against your score, and the scale erases the fact that they need completely different responses. Aggregate that erasure across thousands of ratings and you get the familiar CX predicament: a precise number that moves quarter to quarter and a leadership team that cannot say what to do about it. This is the ceiling that traditional NPS surveys hit, and much of why some product teams are sunsetting NPS as their primary loyalty metric. A single digit cannot capture how customers actually feel or the reasoning behind the rating, which is where the actionable customer feedback lives.

The scale does not have to be abandoned to be fixed — the reasons just have to be put back. Instead of pairing the 0-10 rating with a comment box most customers skip, Perspective AI runs the recommend question as the opening of an AI-moderated conversation that follows up in the customer's own words: a detractor who says "4" is asked what went wrong, and a promoter who says "10" is asked what to protect. That is the difference between survey-based CX measurement and conversational voice of customer, and the logic behind the conversational NPS survey alternative that keeps the familiar segments while recovering the reasons underneath them.

Frequently Asked Questions#

Is the NPS scale 0-10 or 1-10?#

The NPS scale is 0-10, not 1-10. The standard Net Promoter Score question uses an 11-point scale running from 0 ("not at all likely") to 10 ("extremely likely"). Starting at 0 rather than 1 gives respondents a clear "no" floor and is the convention Fred Reichheld defined in 2003. Some tools display a 1-10 version, but that non-standard scale makes your results incomparable to published benchmarks.

What does a 7 or 8 mean on the NPS scale?#

A 7 or 8 on the NPS scale marks a passive — a customer who is satisfied but not loyal enough to actively recommend you. Passives are excluded from the NPS calculation entirely: they count toward your total response base but add neither to your promoter nor detractor percentages. Despite feeling like a good grade, a 7 or 8 signals a customer who could switch to a competitor without much persuasion.

Why are detractors 0-6 and not 0-5?#

Detractors are scored 0-6 because Reichheld's research showed that customers scoring 6 behaved far more like unhappy 0-5 customers than like satisfied 7-8 passives. The cut line was drawn based on actual repurchase and referral behavior, not on splitting the scale evenly. This is why the detractor band covers seven points while the promoter band covers only two — the boundaries follow behavior, not arithmetic symmetry.

Can you use a different scale for NPS?#

You can technically use a different scale, but you lose comparability — the main reason to use NPS at all. A 5-point or 7-point scale shifts where the promoter and detractor thresholds fall and makes your score meaningless against published benchmarks; moving even one boundary (say, counting 8s as promoters) inflates the number and breaks comparison with everyone on the standard 9-10 / 7-8 / 0-6 split. If you want a lighter-weight loyalty signal, it is cleaner to switch to a different metric — see the alternatives to Net Promoter Score — than to bend the 0-10 scale.

The bottom line on the NPS scale#

The NPS scale is an 11-point, 0-10 rating that sorts customers into promoters (9-10), passives (7-8), and detractors (0-6), then feeds a single subtraction — promoters minus detractors — ranging from -100 to +100. Understanding it means holding two facts at once: the segmentation logic is behavioral rather than symmetrical, and the number tells you what and who without ever telling you why. The scale buckets people; it erases their reasons.

The teams getting the most out of NPS in 2026 keep the scale and recover the reasons — treating the 0-10 rating as the start of a conversation, not the end of a survey. Pair the familiar score with AI-moderated interviews that follow up on every rating, so a detractor's "4" and a promoter's "10" each arrive with the context you need to act. It is the same conversational approach CX teams use to close the loop a static scale leaves open, and the fastest way to turn an NPS number into a decision — including which levers actually move customer retention.