CES, or Customer Effort Score, is a metric that measures how much effort a customer had to put in to get their issue resolved or their request handled. It is collected by asking customers to rate their agreement with a statement such as “The company made it easy to handle my issue” on a scale, usually from 1 to 7. A lower effort experience is a strong predictor of customer loyalty and repeat business.
In short
- CES measures how easy or hard it was for a customer to get their issue resolved, not how satisfied they felt.
- It is usually asked as agreement with an ease statement on a 1 to 7 scale, right after the interaction.
- The score is the average of all responses, so a higher average on an ease scale means lower effort.
- Low customer effort is one of the strongest predictors of loyalty, often more so than delight.
- CES tells you effort was high or low, and conversation quality data shows where in the interaction the friction came from.
How CES is asked and calculated
CES is a survey-based metric collected right after an interaction. The customer is shown a statement about ease, such as “The company made it easy for me to handle my issue,” and rates their agreement on a scale, most often 1 to 7 where 7 is strongly agree. The score is the average of all responses, so a higher average means customers found the experience easier.
The calculation in plain text is:
| Element | Detail |
|---|---|
| Question type | Agreement with an ease statement |
| Formula | CES = sum of all response scores / number of responses |
| Scale | Commonly 1 to 7, where 7 is strongly agree |
| Interpretation | A higher average means lower customer effort |
| Worked example | Responses of 6, 7, and 5 give a CES of 6.0 |
| Timing | Sent immediately after the issue is handled |
Why low effort predicts loyalty
Research into customer experience has found that reducing effort is one of the most reliable ways to keep customers, often more predictive of loyalty than trying to exceed expectations. The reasoning is straightforward: customers rarely reward a company for a smooth experience, but a high effort one, with repeated contacts, transfers, or repeated explanations, actively pushes them toward a competitor. Lowering effort protects the relationship you already have.
How CES relates to quality assurance
CES flags that an interaction took too much effort, but not what created the friction. Quality assurance answers that by scoring the conversation itself: whether the customer had to repeat information, whether the issue was resolved on first contact, whether the agent followed the process that keeps things simple. Pairing the two turns a high effort signal into a specific coaching opportunity.
Kaizo measures internal quality through its Internal Quality Score, or IQS, and connects that conversation quality to outcome metrics like CES, so leaders can trace an effort problem back to the handling that caused it. Because Kaizo is native to Zendesk and Salesforce, it scores those conversations directly from the tools your team already works in.
Frequently asked questions
How is CES calculated?
CES is the average of all response scores. Customers rate agreement with an ease statement, usually on a 1 to 7 scale, and you add the scores and divide by the number of responses. On that scale a higher average means customers found the experience lower effort.
What is a good CES score?
On a 1 to 7 scale, an average around 5 or above generally indicates a low effort experience, while scores drifting toward the middle signal friction worth investigating. Because scale wording varies, tracking your own trend over time is more reliable than a fixed target.
Why does customer effort predict loyalty?
Customers rarely reward a smooth experience, but a high effort one, full of repeated contacts and re-explaining, pushes them toward competitors. Reducing effort removes the friction that erodes relationships, which is why low CES tends to track with higher retention.
How does CES relate to QA?
CES tells you an interaction was high effort but not why. Quality assurance scores the conversation for the specific sources of friction, such as repeated information or unresolved first contacts, so an effort problem becomes a concrete behavior a team lead can coach.
Related terms
Connect effort scores to what happens in your conversations
See how Kaizo scores the conversations behind your CES, so a high effort signal points to the friction you can coach away.
