TL;DR: Net Easy Score (NES) measures one thing that predicts loyalty better than almost anything else: how easy it was for a customer to get what they came for. Created at BT as a clearer reworking of the Customer Effort Score, NES asks "Overall, how easy was it to get the help you wanted?" on a 1–7 scale, then nets the percentage who found it easy against the percentage who found it difficult — just like NPS nets promoters against detractors. It matters because effort is a brutal loyalty driver: Gartner (originally CEB) found 96% of customers who have a high-effort experience become disloyal, versus just 9% of low-effort ones. But NES, like every score, only tells you what — not why. This guide covers the formula, benchmarks, how NES stacks up against CES/CSAT/NPS, and how to capture the reason behind the number.
What is Net Easy Score (NES)?
Net Easy Score is a customer experience metric that quantifies how effortless a specific interaction felt for the customer. It was developed at BT (British Telecom), whose researchers found that the standard Customer Effort Score question confused people. So they reworded it into plain language:
"Overall, how easy was it to get the help you wanted today?"
Customers answer on a 1–7 scale running from extremely easy to extremely difficult. NES is then calculated as a net score, much like NPS: you subtract the percentage of customers who found the experience difficult (the bottom of the scale) from the percentage who found it easy (the top), producing a single number that can range from roughly −100 to +100. (Exact scale length and top-/bottom-box definitions vary between implementations — some use a 5-point scale — but the net logic is constant.)
The premise is simple and powerful: the easier you make it for customers to get what they need, the more loyal they become.
Why effort predicts loyalty better than delight
NES rests on one of the most influential findings in customer experience research. In 2010, Matthew Dixon, Karen Freeman, and Nick Toman of the Corporate Executive Board (CEB, now part of Gartner) published "Stop Trying to Delight Your Customers" in Harvard Business Review, based on a survey of more than 75,000 customers. Their conclusion overturned conventional wisdom: reducing effort drives loyalty more reliably than exceeding expectations.
The numbers are stark:
- 96% of customers with a high-effort experience became more disloyal — compared with only 9% of those with a low-effort experience.
- 94% of customers reporting low effort said they would repurchase, and 88% said they would increase their spending.
- 74% of people say they'll do repeat business with a company if the experience is easy.
In other words, customers rarely reward you for going above and beyond — but they reliably punish you for making things hard. NES (and its parent metric CES) exists to catch that hard-to-spot friction before it quietly erodes retention.
How NES is calculated
- Ask the ease question right after a key interaction (a support resolution, a checkout, an onboarding step): "How easy was it to get the help you wanted today?"
- Collect responses on the 1–7 scale.
- Bucket them into Easy (top-box), Neutral (middle), and Difficult (bottom-box).
- Calculate: NES = % Easy − % Difficult.
A positive NES means most customers found you easy to deal with; a negative NES is a flashing red light on a specific journey. Because it's transactional, NES is best deployed at friction-prone moments rather than as a once-a-year relationship survey. For guidance on writing the rating itself, see our scale questions guide.
NES vs CES vs CSAT vs NPS
NES doesn't replace your other metrics — it complements them. Each answers a different question:
| Metric | Question it answers | Best for |
|---|---|---|
| NES (Net Easy Score) | "How easy was this interaction?" | Transactional friction, support, checkout, onboarding |
| CES (Customer Effort Score) | "How much effort did this take?" | Effort on a specific task (NES is a clearer-worded sibling) |
| CSAT (Customer Satisfaction) | "How satisfied are you?" | Immediate reaction to an interaction |
| NPS (Net Promoter Score) | "Would you recommend us?" | Overall relationship and loyalty trend |
The short version: NES and CES are effort metrics, CSAT is a satisfaction metric, and NPS is a relationship/loyalty metric. A customer can be satisfied (high CSAT) yet have worked far too hard to get there (low NES) — and that hidden effort is exactly what predicts whether they'll churn. For a full breakdown, read our CSAT vs NPS vs CES comparison and our take on why NPS is broken.
The limitation every effort metric shares
Here's the catch with NES, CES, CSAT, and NPS alike: they're all scores. A score tells you that an experience was hard. It does not tell you why it was hard, which step caused the friction, or what would have made it easy. A NES of −20 on your billing flow is an alarm — but alarms don't fix themselves, and "add a comment box" produces a pile of vague text nobody analyzes.
Traditionally, closing that gap meant exporting low scorers, scheduling follow-up calls, and manually coding transcripts — slow, expensive, and rarely done at scale. As we cover in our voice-of-customer metrics guide, the score is the starting line, not the finish.
How Koji turns the score into the reason
Koji is an AI-native customer research platform that does what a static score never can: it finds out why. Instead of stopping at "NES = −20," Koji runs AI-moderated voice and text interviews with the customers who struggled — automatically:
- Effort rating + the "why" in one session. Combine a structured ease rating (one of Koji's six question types — open_ended, scale, single_choice, multiple_choice, ranking, yes_no) with intelligent open-ended follow-ups that probe exactly where the friction lived.
- Talk to everyone who scored low, at scale. No scheduling, no moderator bias — the AI interviews 30, 50, or 100 detractors in parallel and reaches each one while the experience is fresh.
- Automatic thematic analysis. Every transcript is coded instantly, so you see the top reasons an experience felt hard — not a spreadsheet of raw quotes.
- One-click reports. Go from "our checkout NES dropped" to a stakeholder-ready report on the root causes in hours, not weeks.
Track NES to know where effort is hurting you. Use AI-moderated interviews to learn why — and actually fix it.
What is a good Net Easy Score?
Because NES is a net metric, scores run from about −100 to +100, and "good" is relative to your baseline and journey. As general guidance:
- Positive NES means most customers found the interaction easy — a healthy sign for that specific journey.
- Negative NES flags a journey where difficulty outweighs ease — treat it as a priority to investigate, not a vanity number to average away.
- Trend over absolute. A single NES reading is far less useful than its movement over time. A checkout NES sliding from +30 to +10 across a quarter is an early churn warning, even while the number is still positive.
The most useful benchmark is your own previous score on the same interaction. Comparing your support NES to another company's checkout NES tells you nothing — different journeys, different effort profiles. Measure each friction-prone moment on its own curve, and watch the direction it's heading. For how to wire this into a broader program, see our voice-of-customer research program guide.
Measure effort, then eliminate it
Net Easy Score tells you which experiences are too hard. Koji tells you what's making them hard and what to do about it — from question to insight in hours, with no research team required. Start with Koji and turn every low score into a clear, fixable root cause.
Related reading: 7 Best NPS Alternatives in 2026 · NPS Is Broken: Better Ways to Measure Customer Loyalty · Best CSAT Software in 2026 · Best Voice of Customer Software in 2026
