Of the three commonly used customer contact metrics, CES (Customer Effort Score) is the strongest predictor of customer loyalty. Research from the customer service world consistently shows that the effort a customer must expend to resolve an issue correlates more directly with repeat purchases and retention than satisfaction or willingness to recommend alone. NPS and CSAT are valuable supplements, but they measure different dimensions. In this article, we answer the most frequently asked questions about these three metrics, so you’ll know exactly which ones to use when and how to combine them into actionable insights. Want to get a head start on what a modern customer experience approach looks like? Then read on.
What exactly do CES, NPS, and CSAT measure?
CES, NPS, and CSAT each measure a different aspect of the customer relationship. CES (Customer Effort Score) measures how much effort a customer had to put in to get something done. NPS (Net Promoter Score) measures the willingness to recommend an organization. CSAT (Customer Satisfaction Score) measures satisfaction with a specific moment or interaction.
Specifically, each metric works as follows:
- CES is measured immediately after an interaction, such as a phone call or a chat conversation. The customer answers a question like “How easy was it to resolve your issue?” on a scale of 1 to 7.
- NPS is typically measured periodically or after a milestone in the customer relationship. The classic question is: “How likely are you to recommend us to someone else?” on a scale of 0 to 10. Scores are categorized into promoters, passives, and detractors.
- CSAT is usually conducted immediately after a specific transaction or point of contact. The customer gives a rating or selects a smiley face to indicate how satisfied he or she was.
Because each metric is measured at a different point in time and addresses a different question, each one provides insight into a different part of the customer journey. That is exactly why the three metrics complement each other rather than replace one another.
Which metric has the strongest link to customer loyalty?
CES has the strongest direct link to customer loyalty. The reasoning is intuitive: customers who don’t have to go to much trouble are more likely to stay and make repeat purchases. A high level of effort—such as having to call multiple times or repeat your story—is a concrete reason to switch to a competitor.
NPS measures intent and sentiment at a higher level. A high NPS is valuable as an indicator of brand preference, but it says less about the day-to-day friction in customer interactions. Someone might recommend an organization and still end up leaving if resolving a problem is a hassle every time.
CSAT measures a snapshot in time. A customer might give a high CSAT score after a pleasant conversation, but if that same conversation was the fourth call about the same problem, the underlying loyalty has already been eroded. CSAT lacks that context.
CES gets to the heart of customer loyalty: convenience. Organizations that consistently see low CES scores know that there is friction in their processes, their workflows, or their communication. Those are exactly the issues that cause customers to drop off.
When should you use NPS, CSAT, or CES?
The choice between NPS, CSAT, and CES depends on what you want to measure and at what point in the customer journey. Use NPS for strategic relationship metrics, CSAT for transaction-oriented feedback, and CES for identifying friction in service processes.
A practical overview:
- Use NPS for: quarterly surveys, after a contract renewal, after onboarding, or if you want to know how customers feel about your brand over the long term.
- Use CSAT for: immediate feedback after a purchase, after a support ticket, after a chat session, or after a visit to a location.
- Use CES to: evaluate a complaint process, measure the ease of use of your IVR menu or self-service options, and after every interaction in which the customer had to make an arrangement or resolve an issue.
For customer service teams that handle a large number of interactions every day, CES is the most useful operational tool. It provides immediate insight into which contact types or channels cause the most dissatisfaction, allowing you to make targeted improvements.
What are the drawbacks of each customer engagement metric?
Every metric has its blind spots. CES says little about the emotional connection to your brand. NPS is sensitive to timing and context. CSAT measures only a snapshot in time and fails to capture underlying patterns.
More details per metric:
- CES drawbacks: The score says nothing about why something was difficult—only that it was difficult. Furthermore, the interpretation of “difficulty” varies by customer group and culture. CES also does not measure proactive customer experiences in which the customer did not have to take any action themselves.
- NPS drawbacks: The score is heavily influenced by recent experiences. Someone who has just had a bad experience will give a low score, even if the long-term relationship is good. Furthermore, NPS doesn’t tell you what to improve; it only tells you that something is wrong.
- CSAT drawbacks: Response rates are often low and selective. Customers who respond tend to be at the extremes: very satisfied or very dissatisfied. The silent majority in the middle remains out of sight. Furthermore, a high CSAT score says nothing about long-term retention.
The solution to all these limitations is not to perfect a single metric, but to use the three metrics together as a complementary system.
How do you combine CES, NPS, and CSAT into a single report?
You combine CES, NPS, and CSAT into a single report by linking each to a different stage of the customer journey: operational (CES), transactional (CSAT), and relational (NPS). By comparing the three scores side by side, you can see whether an operational issue affects satisfaction and, ultimately, willingness to recommend.
A practical approach in real life:
- Link each metric to a measurement point: CES after each touchpoint, CSAT after completed transactions, and NPS periodically or after milestones.
- Segment by contact type: Analyze the scores by channel (phone, chat, email) and by type of inquiry. This will help you identify where the most friction lies.
- Uncover correlations: Is your CES score rising, but your NPS falling? If so, your operations team is resolving issues effectively, but something else is undermining the relationship. That combination tells a story that no single metric can convey on its own.
- Make it reportable to management: Consolidate the three metrics into a single dashboard overview that shows trends over time, so that the executive team and management team can also steer the organization toward customer experience goals.
Without a centralized overview of all channels, this type of combined reporting is practically impossible. Fragmented systems, in which phone calls, chat, and email each generate their own data, make it difficult to identify connections. That is exactly where an integrated contact center solution makes a difference.
How Pegamento Helps Measure and Improve Customer Loyalty
We understand that metrics are only valuable if you can actually do something with them. Pegamento offers organizations an integrated approach in which CES, NPS, and CSAT are not isolated metrics, but part of a cohesive system that provides actionable insights when it matters most.
What we offer specifically:
- Omnichannel contact center technology that consolidates all customer interactions—via phone, chat, WhatsApp, and email—into a single view, allowing you to link metrics to channels and contact types.
- Smart routing and self-service that immediately reduce CES by connecting customers to the right person or the right answer more quickly, without unnecessary transfers or having to repeat their story.
- Reports and dashboards that combine CES, CSAT, and NPS into a single overview, so that management and executives can also focus on customer loyalty.
- Agentic AI assistants that handle repetitive questions on their own, thereby reducing the workload on employees so that specialists can focus on complex issues that really matter.
Our solutions aren’t expensive custom work, but a smart combination of proven modules that you purchase as a complete package from a single provider. From implementation to management and support: one point of contact, no silos. Want to know what this looks like for your organization? Contact us, and we’d be happy to work with you to find the right solution.
Frequently Asked Questions
How many questions can I combine in a single survey without affecting the response rate?
Limit yourself to a maximum of one primary metric per survey round. After a touchpoint, this should preferably be the CES, possibly supplemented with one open-ended question. As soon as you combine multiple scaled questions, the response rate drops noticeably and the reliability of the data decreases. Fewer questions, higher quality—that’s the practical rule of thumb.
What is a good CES score, and how do I know if my score needs to improve?
There is no universal benchmark that applies to every industry, but on a scale of 1 to 7, an average score of 5.5 or higher is generally considered good. More important than the absolute score is the trend over time and the comparison by channel or contact type. If you see that phone consistently scores lower than chat, you know exactly where to start making improvements.
What should I do if my NPS is high but my CES is low?
This pattern indicates that customers value your brand but find the day-to-day service processes cumbersome. In the short term, that’s not a problem, but in the long term, structural friction can undermine even the strongest brand preference. Use the low CES as a priority signal to simplify your contact processes, routing, or self-service before loyalty actually starts to erode.
How do I prevent customers from getting survey fatigue if I want to measure multiple metrics?
Spread your measurements strategically across the customer journey and link each measurement point to a logical touchpoint. Send the CES immediately after a service interaction, the CSAT after a purchase or completed transaction, and the NPS only a few times a year. This way, the customer perceives each question as relevant and contextual, rather than as a generic survey that always comes at the wrong time.
Does it make sense to also use CES for proactive customer communication, such as a status update or a proactive notification?
CES was originally designed for reactive service interactions where the customer had to take action themselves. For proactive communication where the customer doesn’t need to do anything, CSAT is a better choice because it measures appreciation for the initiative. So use CES specifically for moments when the customer had to take the first step, not for moments when you took the initiative.
How do I handle cultural differences in the interpretation of rating scales?
Customers from different cultures use rating scales differently: some groups consistently rate more conservatively, while others rate more extremely. Therefore, always segment your data by customer segment or region before drawing conclusions, and preferably compare trends within a group rather than absolute scores across groups. Also consider having the questions and scale descriptions adapted by a native speaker for each language region.
What first step can I take if my organization isn’t using these metrics at all yet?
Start with CES at a single specific and common touchpoint, such as after every completed support interaction via phone or chat. This will quickly provide you with actionable data without a major implementation effort. Once you see which patterns emerge, you can gradually add CSAT and NPS and link the three metrics together in a combined dashboard.
