Customer Satisfaction Score is one of the oldest and most direct customer metrics. It answers a narrow, honest question: was this particular experience good or not? You ask shortly after an interaction — a purchase, a delivery, a support ticket — and the customer rates their satisfaction on a scale, most commonly 1 to 5, where the top points mean "satisfied" and "very satisfied".
Calculating it is straightforward. You take the number of people who chose the top responses and divide by the total number of responses, then express it as a percentage. On a 5-point scale, most teams count 4s and 5s as satisfied. So 85 satisfied responses out of 100 gives a CSAT of 85%. The simplicity is the point: anyone in the business can understand it instantly.
CSAT versus NPS
The two metrics are often confused, but they answer different questions. CSAT asks "How was this experience?" — it is transactional and tied to a moment. NPS asks "How do you feel about us overall, enough to recommend us?" — it is relational and tied to the whole journey. A customer can be delighted by a single fast support reply (high CSAT) while still being lukewarm about the product as a whole (modest NPS). Neither is more correct; they simply measure different things, and using them together gives a fuller picture than either alone.
Interpretation and context
A CSAT of 85% sounds excellent, but context decides whether it is. For a simple, low-stakes interaction like confirming an order, customers expect near-perfection and 85% might be mediocre. For a complex, emotional interaction like resolving a billing dispute, the same 85% could be outstanding. As with most metrics, the trend over time and the comparison to your own history matter more than the raw figure.
Limitations
CSAT has a timing bias built in: it captures how someone feels in the moment, which can swing with mood and fade quickly. It also suffers from response bias — people with strong feelings, good or bad, are more likely to answer, so the middle gets under-represented. And scale design quietly shapes the result: a 5-point scale, a 7-point scale, and a smiley-face scale will not produce comparable numbers, so you cannot benchmark across surveys that use different scales.
Common Misconceptions
Most people think
"A high CSAT means customers are loyal."
Actually
CSAT measures satisfaction with one moment, not loyalty. A customer can be
satisfied today and still leave tomorrow if the overall relationship is
weak — which is exactly the gap NPS tries to capture.
Most people think
"CSAT and NPS are basically the same thing."
Actually
They measure different things on different timeframes — a specific
experience versus the whole relationship — and a healthy programme usually
tracks both rather than choosing one.
Common mistakes
The most frequent mistake is surveying too much. Firing a CSAT request after every tiny interaction trains customers to ignore them, and your response rate quietly collapses until only the angriest reply. A second mistake is collecting CSAT and acting only on the average, never reading the reasons behind low scores — which is where the fixable problems hide.
It is worth being clear about why this helps with CSAT, because it is not what people assume. With CSAT every comment already carries a rating, so you can always filter the open answers by score after the fact — the sorting is free. The real reason to branch the question is the wording. In Dayalogs you can route a different open question depending on the rating, asking low scorers what went wrong and high scorers what worked. A question tailored to the score pulls out sharper answers than a generic comment box, which collects a hollow "all good" from happy customers and a shapeless complaint from unhappy ones. So even though the rating already sorts your feedback, branching gives you better feedback to sort — and that is what makes the final analysis cleaner.
Used with judgement, CSAT is a sharp, fast signal for individual touchpoints — the metric that tells you which specific part of the experience just got better or worse. Used carelessly, it becomes survey spam that flatters the average and buries the very feedback you needed to hear.