The ten KPIs that actually describe a call centre

There are dozens of things you can measure. These ten cover the ground that matters, and they sort neatly into three jobs a call centre has to do: get the caller to an agent, run the floor efficiently, and leave the customer sorted.

Access: can callers reach you?

Service level is the headline access number: the share of calls answered within a set time. Average speed of answer (ASA) is the average wait before an agent picks up. Call abandonment rate is the share of callers who give up before reaching anyone. Together they tell you whether your queue is a bottleneck, and they move on the same lever: staffing against the peak, not the daily average.

Efficiency: are you running the floor well?

Average handle time (AHT) is how long an agent spends on a call plus its wrap-up work. Occupancy is the share of logged-in time agents spend actually handling contacts rather than waiting. Schedule adherence is how closely agents stick to their planned shifts and breaks. These three keep cost and coverage honest, but they are inputs, not goals. Push any of them too hard and quality drops.

Outcome: did the customer leave sorted?

First contact resolution (FCR) is the share of issues solved in a single interaction, no call-back or transfer. QA score is your internal scorecard of how well agents handled the call. CSAT captures satisfaction with a specific interaction; NPS captures longer-term loyalty. These are the numbers customers actually feel, and every other metric on the list exists to move them.

Every KPI: definition, formula and target

One reference table. The formula is how you calculate it; the target is a labelled industry benchmark to aim towards, not a law. Adjust for your sector and call mix.

How to actually move each number

A target you cannot influence is just pressure. Here is the practical lever behind each KPI, grouped the same way as the metrics themselves.

Lift service level and cut abandonment

Both are staffing-and-flow problems. Forecast demand by half-hour and schedule agents to the peak rather than the daily average, because the half-hour when everyone phones at once is where the queue overflows. Offer a call-back instead of a hold, route simple queries to self-service, and flatten the IVR so callers reach a person in two or three choices. If abandonment spikes at a predictable time each day, that is a rostering gap, not a caller problem.

Bring down speed of answer without burning agents

ASA falls when more of the right agents are available at the right moment. Skills-based routing gets the caller to someone who can help first time, which frees capacity across the floor. Watch ASA and occupancy together: if you cut wait times by running agents at 90%+ occupancy, you are borrowing against burnout and attrition, and it comes back as sick days and errors.

Manage handle time and occupancy as a balance, not a race

Shorten AHT by fixing the causes of long calls, not by rushing agents: better knowledge-base search, screen-pop so the agent starts with the caller’s history, and cleaner after-call work. Hold occupancy in the 75–85% band. Above that, quality and morale slide; well below it, you are overstaffed. Adherence improves with realistic schedules and clear break discipline, not surveillance.

Raise first contact resolution, QA and satisfaction together

These move as a set. FCR climbs when agents have authority, a searchable knowledge base, and the context to solve an issue in one call. A QA scorecard that rewards connection and resolution, not just script compliance, coaches agents toward the behaviours that lift CSAT. Close the loop on feedback: a low CSAT verbatim that triggers a coaching moment is worth more than a dashboard nobody reads. FCR is the single strongest driver of satisfaction, so if you improve one outcome metric first, make it that one.

Setting up KPI tracking in four weeks

You do not need a reporting overhaul. Four focused weeks take you from scattered numbers to a cadence that changes decisions.

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