Customer satisfaction (CSAT) measures how well a product, service, or interaction meets customer expectations, usually through one survey question scored from one to five. The score is the percentage of respondents choosing the top two options. CSAT captures sentiment about a specific moment rather than long-term loyalty.
What is Customer Satisfaction (CSAT)?
CSAT is a metric that measures how satisfied customers are with a specific interaction, product, or experience. Typically through a short survey asking "How satisfied were you?" on a 1-5 or 1-10 scale.
The formula: (Number of satisfied responses / Total responses) x 100 = CSAT score. If 80 out of 100 respondents rate their experience a 4 or 5 (on a 1-5 scale), your CSAT is 80%. Simple, fast, and actionable. That's why it's one of the most widely used customer metrics.
American Customer Satisfaction Index (ACSI) data shows the national average CSAT across industries is 73%. Top performers consistently score 80%+. While the number itself matters, the trend matters more. Is your CSAT improving, declining, or flat?
Why Does CSAT Matter?
CSAT is the pulse check on your customer experience. When it drops, something's broken. When it rises, something's working.
- Early warning system. Declining CSAT catches experience problems before they become churn problems
- Ties to revenue. Satisfied customers buy more, stay longer, and refer others. A 5% increase in retention (driven by higher satisfaction) can increase profits by 25-95%.
- Specific and actionable. Unlike NPS which measures overall loyalty, CSAT can measure satisfaction with a specific touchpoint. Support call, onboarding, feature update. So you know exactly what to fix
- Easy to implement. One question, one follow-up. Customers actually complete it because it takes 10 seconds.
CSAT won't tell you everything about your customer relationships. But it tells you the one thing that matters most: are they happy right now?
How CSAT Works
Choose the Touchpoint
Decide what you're measuring. Post-purchase satisfaction? Support ticket resolution? Onboarding experience? Feature satisfaction? CSAT works best when tied to specific moments, not as a general "how do you feel about us" question.
Send the Survey
Trigger the survey immediately after the interaction. Speed matters. Responses are most accurate when the experience is fresh. Keep it to one rating question and one optional open-ended follow-up.
Act on Results
Aggregate scores reveal trends. Individual responses reveal stories. Follow up with dissatisfied customers personally. They'll tell you exactly what went wrong. Share themes with product, support, and customer success teams.
CSAT Examples
Example 1: Support ticket CSAT A SaaS company surveyed customers after every support interaction. Overall CSAT was 78%. Drilling down, live chat scored 88% while email support scored 64%. They invested in improving email response speed and quality. Six months later, email CSAT rose to 79%.
Example 2: Onboarding CSAT A B2B services company measured CSAT at the end of their onboarding process. Customers who rated onboarding 4-5 retained at 92%. Customers who rated it 1-3 retained at just 55%. CSAT became the strongest predictor of long-term retention.
How to calculate CSAT
CSAT is the share of respondents who chose one of the top two options, expressed as a percentage. On a 1-5 scale that means the 4s and 5s; on a 1-7 scale, the 6s and 7s. Middle ratings count against the score on purpose, because a 3 out of 5 is not a satisfied customer.
Worked example. A support desk closes 640 tickets in a month and sends a one-question survey after each one. 192 people answer, a response rate of 30%. Of those, 141 rate the interaction 4 or 5. CSAT is 141 divided by 192, times 100, which is 73.4%.
Two details decide whether that number is comparable to last month's. The first is response rate: at 30%, the sample leans toward people with strong feelings in either direction, so read the verbatims before you read the percentage. The second is the denominator. Some teams divide by surveys sent rather than surveys answered, which produces a much lower score that cannot be benchmarked against anyone else's. Pick one method and keep it for the full year.
CSAT vs NPS vs churn rate
The three metrics answer different questions, and using one as a stand-in for another is the most common measurement error in customer teams.
- CSAT asks about one moment that just happened. It is the fastest signal and the easiest to route to a specific team.
- NPS asks about the relationship as a whole. It moves slowly and reflects months of accumulated experience, not this morning's support ticket.
- Churn rate is the outcome. It confirms what the other two predicted, usually a quarter after anything could have been done about it.
Run CSAT at the touchpoint level, NPS quarterly at the account level, and treat churn as the scoreboard rather than a diagnostic.
CSAT for a small or local business
A small business rarely has the volume for a stable percentage. At 20 responses a month, one unhappy customer swings the score five points, so the trend line is noise. Two adjustments make it usable: track a rolling 90-day score rather than a monthly one, and treat the written comments as the primary output with the percentage as context.
There is also a public version of the same signal. For a local business, the star rating on your Google Business Profile is satisfaction data that prospects read before they ever contact you, which makes it worth more attention than a private survey. Asking for a review after a good interaction and asking for a CSAT rating after the same interaction are the same operational habit pointed at two different audiences.
Common CSAT mistakes
- Surveying too late. Send it within an hour of the interaction. Accuracy drops as memory fades.
- Asking more than one question. Each extra field cuts response rate. One rating plus one optional comment box is the whole survey.
- Reporting the score without the sample size. 90% from 10 responses and 90% from 900 are not the same fact.
- Never closing the loop. A 1 or 2 rating with no follow-up call wastes the most valuable response you received that week.
- Changing the scale mid-year. Moving from a 1-5 to a 1-10 scale resets your history and hides whatever trend you were tracking.
Frequently Asked Questions
What's a good CSAT score?
75-85% is considered good across most industries. Above 85% is excellent. Below 70% signals problems that need immediate attention. Always compare against your industry benchmark and your own historical trend.
How is CSAT different from NPS?
CSAT measures satisfaction with a specific interaction or moment. NPS measures overall loyalty and likelihood to recommend. CSAT is tactical (what just happened). NPS is strategic (what do they think of us overall). Use both.
How often should you measure CSAT?
After every measurable touchpoint: support interactions, purchases, onboarding completion, and feature releases. Don't survey the same customer more than once per month to avoid survey fatigue.
What is a good CSAT response rate?
Between 15% and 30% is normal for a post-interaction survey sent by email, and higher for in-app or in-product prompts. Below 10%, the sample is too self-selected to trend reliably, so shorten the survey and send it sooner rather than chasing the percentage.
How do I improve a low CSAT score?
Segment before you act. Split the score by channel, by team, and by request type, and the low ratings usually cluster in one place rather than spreading evenly. Fix that cluster, call every detractor who left a comment, and re-measure after a full cycle instead of week to week.
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