What is Customer Effort Score (CES)?
Customer Effort Score is a survey metric that measures how much effort a customer had to expend to get an issue resolved or complete a task, typically on a numeric scale from a single post-interaction question. It's used as a predictor of loyalty and churn risk, based on research showing effort matters more to retention than delight.
TL;DR
Customer Effort Score measures how hard a customer had to work to get something done, and a low score predicts loyalty better than most satisfaction surveys.
Formula
Customer Effort Score = Average of individual effort ratings collected from a single post-interaction survey question, typically scored on a 1-to-5 or 1-to-7 scale.
Why It Matters
Customer Effort Score matters because research consistently shows reducing customer effort predicts loyalty more reliably than trying to delight customers, which runs counter to a lot of intuitive customer experience strategy. A customer who has to contact support three times or navigate a confusing process to resolve a simple issue is far more likely to churn than one who solves the same problem in a single, frictionless interaction, even if that second customer wasn't especially delighted by the experience. CES is typically captured with a single, simple question right after an interaction, making it fast to collect and easy to track trend over time. For any team investing in customer experience, CES helps separate genuine friction reduction from surface-level polish that doesn't actually move retention.
Example
A SaaS company surveys customers immediately after a support ticket is resolved, asking how easy was it to get your issue resolved on a 1-to-5 scale. A customer who had to escalate the same billing question three times before getting an answer rates the interaction a 2. That low-effort score correlates strongly with that customer's account showing elevated churn risk in the following quarter, even though the issue was technically resolved.
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