What is Customer Effort Score?
Customer Effort Score was introduced by the Corporate Executive Board (now Gartner) in a 2010 Harvard Business Review article. The core finding was that reducing customer effort is a stronger predictor of loyalty than delighting customers. Users do not need to be wowed. They need things to work without friction.
CES is measured with a single question: "To what extent do you agree with the following statement: [Company] made it easy for me to [complete task]." Users respond on a 1-7 scale, where 1 is strongly disagree and 7 is strongly agree. The score is the average of all responses.
CES is most effective when tied to a specific interaction. Ask it after a support ticket is resolved, after a user completes onboarding, or after they use a new feature for the first time. This specificity makes the results actionable because you know exactly which experience generated the score.
Why Customer Effort Score Matters for Product Teams
High-effort experiences drive churn. Research shows that 96% of customers who have a high-effort interaction become disloyal, compared to only 9% of those with low-effort experiences. Effort is the friction between a user and the value your product delivers.
For product teams, CES highlights usability problems that other metrics miss. A feature might have high adoption (people use it) and decent CSAT (they are not unhappy) but still require too much effort. CES catches the features that work but are harder than they should be.
CES is also useful for measuring the impact of UX improvements. If you redesign a workflow to reduce steps, CES tells you whether the redesign actually reduced perceived effort from the user's perspective. Usage data alone cannot capture that subjective experience.
How to Use CES Effectively
Deploy CES surveys at moments where effort is relevant: after completing a task, after a support interaction, or after navigating a complex workflow. Do not send CES surveys randomly. The question only makes sense in context.
Segment your CES data by task type and user cohort. Onboarding effort may differ from daily-use effort. Power users may find things easy that new users struggle with. Breaking down the data reveals where to focus your effort-reduction work.
Combine CES with qualitative feedback. When a user rates their effort as high, ask a follow-up question about what was difficult. Feed those responses into your product backlog as usability improvements. Use your feedback board to track whether other users share the same friction point.
Set targets and track trends. A CES of 5 out of 7 might be your baseline. Aim to reach 6 within two quarters by shipping specific improvements. Monitor whether scores rise as you reduce friction in the areas users identified as problematic.