Definition · Contact centre and BPO
Customer Satisfaction Score
Definition
Customer satisfaction score (CSAT) is the percentage of surveyed customers who rate a specific interaction as satisfied, usually 4 or 5 on a 5-point scale. If 412 of 500 respondents choose 4 or 5, CSAT is 82.4%. Contact centers use it to measure how individual contacts, agents and processes land with customers.
Also called: CSAT, CSAT score, Customer satisfaction rating
Formula
CSAT % = Number of satisfied responses (4 or 5 on a 5-point scale) ÷ Total survey responses × 100
- Satisfied responses
- Responses in the top two boxes of the scale, for example 'satisfied' and 'very satisfied'. Some organizations count only the top box.
- Total survey responses
- All completed answers to the CSAT question in the period, not the number of surveys sent.
- Response rate
- Responses ÷ surveys sent. Low response rates make CSAT less reliable, especially at agent level.
Worked example
A utility's billing team handles 18,000 calls in October and sends a post-call text survey after each. 1,450 customers answer: 640 give a 5, 520 a 4, 130 a 3, 70 a 2 and 90 a 1. Satisfied = 640 + 520 = 1,160. CSAT = 1,160 ÷ 1,450 = 80.0%. The response rate is 1,450 ÷ 18,000 = 8.1%. An agent with 22 responses and a CSAT of 68% is only 4 or 5 responses away from the team average, so read that number with care.
How CSAT works
CSAT asks a direct question right after an interaction: "How satisfied were you with your experience today?" on a 1 to 5 scale. The score is the share of top-box answers, which is easier to explain than an average. A mean rating of 4.1 hides whether you have a lot of fours or a mix of fives and ones, and the second pattern points to a very different problem.
Because it is tied to a single contact, CSAT is the most actionable customer metric a contact center has. It can be cut by agent, queue, contact reason, channel, time of day and tenure band. That makes it useful for coaching and process fixes, not just for a board slide.
Designing a CSAT survey
Keep it short. One rating question and one optional open-text question ("What is the main reason for your score?") will outperform a ten-question survey on response rate and on usefulness.
Practical choices that change your numbers:
- Timing. Send within minutes of the contact. Responses collected a day later blend the agent interaction with whatever happened since.
- Channel. SMS and in-chat surveys usually get higher response than email. IVR post-call surveys depend on the agent transferring the caller, which invites cherry-picking.
- What you ask about. "Satisfied with the agent" and "satisfied with the outcome" are different questions. If policy denied a refund, the agent can do everything right and still get a 1. Some centers ask both.
- Scale. Keep the same scale for years. Changing from 5-point to 10-point breaks your trend line.
Do not let agents choose who gets surveyed. Automatic sampling is the only way to get a fair score.
CSAT benchmarks
A common benchmark for contact center CSAT is 75% to 85%, with high-performing service teams in simple, low-stress transactions often above 85%. Collections, claims denials and technical support for outages run lower, often 60% to 75%, because the reason for the contact is already a bad experience.
The benchmark that matters most is your own trend, broken down by contact reason. A 3-point drop in CSAT on password resets tells you more than a comparison with another industry's average.
CSAT vs NPS vs CES
These three are often reported together and confused with each other.
- CSAT measures satisfaction with a specific interaction. It is short-term and transactional.
- [Net promoter score](/glossary/net-promoter-score/) asks how likely the customer is to recommend the company, on a 0 to 10 scale. It measures the overall relationship and is influenced by price, product and brand as much as by service.
- [Customer effort score](/glossary/customer-effort-score/) asks how easy it was to get the issue resolved. It tends to predict repeat contacts and churn well.
In a contact center, CSAT and CES are the operational metrics agents and team leads can influence. NPS is a company metric that the contact center contributes to.
What drives CSAT in a contact center
The strongest driver is almost always resolution. Customers whose issue is fixed on the first contact typically rate far higher than those who have to call back, which is why first call resolution and CSAT move together. After resolution come wait time, the number of transfers, whether the agent understood the problem quickly, and whether the customer had to repeat information.
This matters for hiring. If CSAT lags among agents in their first 90 days, the cause is usually knowledge and system confidence, not attitude. Better training, a stronger knowledge base and nesting support will lift it faster than hiring for "friendliness." When you do assess candidates, a realistic call simulation that tests listening and problem solving predicts CSAT better than a personality questionnaire.
Common mistakes
- Ranking agents on tiny samples. An agent-level score based on 15 responses is noise. Use rolling 90-day windows and a minimum response count, often 30 or more.
- Paying bonuses on CSAT alone. It invites agents to ask for good scores, avoid difficult callers or offer concessions they should not.
- Ignoring the comments. The open-text field is where the fixable problems are. Tag and trend it by contact reason.
- Blaming agents for policy. Separate agent satisfaction from outcome satisfaction, or you will coach people for decisions they did not make.
- Surveying only resolved contacts. That inflates the score and hides the customers you are losing.
Frequently asked questions
How do you calculate customer satisfaction score?
CSAT % = number of satisfied responses (usually 4 or 5 on a 5-point scale) ÷ total responses × 100. For example, 412 satisfied out of 500 responses gives a CSAT of 82.4%.
What is a good CSAT score?
For contact centers, a common benchmark is 75% to 85%. Simple service interactions often score higher, while collections, claims and outage support usually score lower. Your own trend by contact reason is the most useful comparison.
What questions should a CSAT survey ask?
One rating question such as "How satisfied were you with your experience today?" on a 1 to 5 scale, and one optional open-text question asking for the main reason for the score. Some centers add a separate question on whether the issue was resolved.
What is the difference between CSAT and NPS?
CSAT measures satisfaction with a specific interaction. NPS measures how likely a customer is to recommend the company overall. CSAT is better for coaching agents; NPS reflects the whole relationship, including price and product.
How many CSAT responses do you need per agent?
Enough to separate signal from noise. Many centers require at least 30 responses in a rolling period before using agent-level CSAT in coaching or scorecards.
Should agent bonuses depend on CSAT?
CSAT can be part of an agent scorecard, but tying pay to it alone tends to encourage score-begging and avoidance of difficult contacts. Combine it with quality, resolution and adherence.