Call center KPIs are the numbers that tell you how your team really serves customers, not how you imagine it does. Without them, decisions run on gut feeling: "it feels busy", "that agent feels slow". This guide defines 12 core KPIs, explains how to calculate each one in plain words, how to read it, the common mistakes, and where to find it in Klamna's cloud call center.
One note before we start: we will not hand you "industry standard" targets. Every business is different; an order confirmation call is not a technical support call or a clinic booking. Set your targets based on your own business and use your first month as the baseline.
Speed KPIs: how long do customers wait?
1. Average speed of answer (ASA)
Formula: total waiting time of answered calls divided by the number of answered calls.
How to read it: lower means customers reach an agent faster. Look at it by hour, not only as a daily average, because the peak hides inside the average.
Common mistake: forgetting that callers who hung up are not in it; always read it next to the abandon rate.
2. Abandon rate
Formula: calls where the caller hung up before an answer, divided by all calls that entered the queue.
How to read it: the clearest sign of lost customers. If it rises at certain hours, that shift is probably understaffed.
Common mistake: treating every abandoned call as final. What matters is who called back and how fast; keep a daily missed-calls report with an owner.
3. Service level
Formula: calls answered within a time limit you choose, divided by all calls.
How to read it: combines speed and coverage in one number management understands.
Common mistake: changing the time limit every month so nothing is comparable.
Efficiency KPIs: how long does a call take?
4. Average handle time (AHT)
Formula: (talk time + hold time + after-call work) divided by the number of calls.
How to read it: helps you plan staffing. Big differences between agents in the same queue usually mean a gap in training or information.
Common mistake: pushing agents to shorten calls, so problems stay unsolved and customers call again.
5. Wrap-up time
Formula: average time an agent spends after the call writing notes, choosing a wrap-up code or opening a ticket.
How to read it: if it is long, the system is probably not helping: agents search for customer data or type the same thing twice.
Common mistake: removing it entirely and losing the wrap-up codes that tell you why people call.
6. Occupancy
Formula: time an agent spent on calls or after-call work, divided by their available time.
How to read it: very low means more agents than load at that time; very high for long periods means fatigue and falling quality.
Common mistake: assuming high occupancy is always good.
Quality KPIs: was the problem solved?
7. First call resolution (FCR)
Formula: issues solved without the customer calling again about the same topic within a window you define, divided by all issues.
How to read it: one of the most important KPIs because it measures what customers actually want. Measure it from repeat calls by the same number, tickets closed on first contact, or by asking in the survey.
Common mistake: relying only on the agent saying it was solved.
8. Quality (QA) score
Formula: average score of calls evaluated on a fixed scorecard (greeting, understanding, accuracy, process, closing).
How to read it: explains the "why" behind other numbers, for example long calls because the agent does not know the procedure. In Klamna, evaluations are done in the quality module on the recording itself, and agents can acknowledge or dispute them.
Common mistake: evaluating too few or hand-picked calls.
9. Customer satisfaction (CSAT)
Formula: positive answers in the post-call or post-chat survey divided by all answers.
How to read it: by agent, queue and call type; when it drops, go back to those recordings. More in our CSAT guide.
Common mistake: judging an agent on two or three answers.
Team KPIs: who is available and working?
10. Schedule adherence
Formula: time an agent was actually available during the shift, divided by planned shift time.
How to read it: if the team is full on paper but the queue is busy, look here: late logins or long breaks. Klamna records shifts, breaks and logins, and a break automatically pauses the agent's queue calls.
11. Calls answered per agent
Formula: calls each agent answered in the period.
How to read it: useful for balancing load, but read it with handle time and quality; fewer calls can mean harder calls.
12. Conversion or completion rate
Formula: calls that ended with the desired outcome (order confirmed, booking made, lead qualified) divided by all calls of that type.
How to read it: the KPI for sales, order confirmation and outbound teams. It depends on agents choosing the right wrap-up code, so train them on the codes. For outbound work see the auto dialer.
Where to find these KPIs in Klamna
- Live wallboard: calls waiting now, longest wait, agents available, busy and on break. The supervisor's screen all day.
- Call log: each call's full journey: IVR choices, wait, who answered, talk time, wrap-up code and recording.
- Report builder: pick a source (calls, chats, tickets, leads), filter, group by agent, queue or day, show a table or chart, schedule it by e-mail or export to Excel.
- Quality module: scorecards, agent scores and disputes.
- Satisfaction survey: after calls and chats, by agent and team.
- Attendance: shifts, breaks and logins per agent.
Ticket deadlines and escalations live in the ticketing system, explained in our SLA guide.
Common mistakes when reading call center KPIs
- One KPI alone: speed without quality gives fast calls and unsolved problems. Pair every speed KPI with a quality KPI.
- Only averages: the daily average can look fine while callers hang up at the peak. Split by hour.
- Comparing different queues: complaints and sales calls are not comparable.
- Punishment instead of coaching: the team learns to improve the number, not the service.
- Wrap-up codes used badly: half your reports depend on them; keep them few and clear.
- Too many KPIs: follow five to seven that you actually act on.
A simple weekly routine
- Daily: the supervisor watches the wallboard and checks the missed-calls report at the end of the day, making sure every one was returned.
- Weekly: a short team meeting on five numbers (abandoned, speed of answer, handle time, first call resolution, satisfaction), plus one good and one improvable call from the recordings.
- Monthly: a management report with the trend against last month, top call reasons from wrap-up codes and clear decisions: more agents on a shift, a change to the IVR, a new knowledge base answer.
Start measuring properly
KPIs are not the goal; they show where customers struggle and where your team needs support. Klamna keeps calls, chats, tickets, quality and attendance in one system, so reports come from one source without manual work. Start a free trial and build your package on the pricing page, or talk to our team to choose the right KPIs for your business.