What is Customer Effort Score?
Customer Effort Score (CES) measures how much effort a user had to spend to complete a task, resolve an issue, or reach a specific outcome inside your product. Users answer a single question, usually on a 1-to-7 scale, agreeing or disagreeing with a prompt like "This was easy to do." The average of those responses is your CES.
CES is a diagnostic metric rather than a relationship one. Where CSAT asks whether a user is satisfied, CES asks a narrower question: did friction get in the way? That specificity is what makes it useful to product teams, not only customer experience teams.
Why Customer Effort Score matters
Low-effort experiences are one of the strongest predictors of loyalty in software products. A user who has to fight through a confusing flow to accomplish a simple task remembers the friction long after the task is done, even if they eventually succeeded. High-effort moments accumulate across a customer's lifecycle: a hard onboarding step here, a confusing settings page there, until the cumulative weight shows up as churn with no single obvious cause.
CES gives teams a way to catch that accumulation before it becomes a churn statistic, because it is collected close to the moment of friction rather than months later in a broad relationship survey.
How to calculate CES
The standard formula is straightforward:
Ask users to rate agreement with a statement such as "[Company] made it easy for me to [complete task]," typically on a 1–7 scale.
Sum all responses.
Divide by the number of respondents.
Some teams use a simplified version: the percentage of respondents who rated 5 or higher, treated as the "low effort" share. Either method works as long as it stays consistent across survey waves so scores are comparable over time.
Where CES fits in a broader feedback program
Satisfaction metrics like CSAT answer whether a user is happy; loyalty metrics like Net Promoter Score answer whether they'd recommend you. CES fills the gap between them by pointing at a specific flow, screen, or step that cost a user more effort than it should have.
Where to place CES prompts
CES is most useful attached to specific in-product moments rather than sent as a standalone campaign: right after a user completes onboarding, sets up an integration, or responds to an in-app survey prompt. Pairing a low score with a session recording of the same flow turns it into a specific, fixable problem instead of a number without context.
