Occupancy calculator

How this is calculated

Occupancy is time spent handling contacts divided by time logged in. Contacts multiplied by handle time gives the numerator; agents multiplied by the length of the period gives the denominator. Everything outside logged-in time — breaks, training, absence — is shrinkage, and belongs in a different calculation.

handlingMinutes = contacts × AHT
loggedInMinutes = agents × periodMinutes
occupancy       = handlingMinutes / loggedInMinutes

Worked example

Twenty agents logged in for an eight-hour shift handle 1,200 contacts at six minutes each. That is 7,200 minutes of handling against 9,600 logged-in minutes — 75% occupancy, inside the healthy band. The remaining 2,400 minutes are not waste: that is the spare capacity that lets the queue be answered quickly.

Occupancy is not utilisation

Occupancy measures only logged-in time, so breaks, training and meetings sit outside it — those belong to shrinkage. Utilisation measures against the paid shift and includes them. An agent can be 85% occupied while being available for phone work barely half of what you pay for, so quoting one when you mean the other misleads badly in both directions.

Occupancy and service level pull against each other by construction. Answering calls quickly requires agents sitting idle waiting for them, so a queue staffed to answer 95% within 20 seconds will necessarily run lower occupancy than one staffed to 70%. Treat 83% as a ceiling rather than a target: sustained operation above it is associated with burnout and attrition, and attrition is far more expensive than idle time.

Frequently asked questions

How do you calculate occupancy in a call centre?

Divide the time agents spent handling contacts by the time they were logged in. Handling time is contacts multiplied by average handle time, including after-call work. If 20 agents are logged in for an eight-hour shift and handle 1,200 contacts at six minutes each, that is 7,200 minutes of handling across 9,600 logged-in minutes — 75% occupancy.

What is a good occupancy rate?

Between 75% and 85%, with roughly 83% observed as a practical working maximum. Below 70% you are either over-staffed or agents are logged in while doing other work. Sustained above 85% is associated with burnout and attrition — it is a number to treat as a ceiling rather than a target.

What is the difference between occupancy and utilisation?

Occupancy measures only logged-in time, so breaks, training and meetings sit outside it. Utilisation measures against the paid shift and therefore includes them. An agent can be 85% occupied while being available for phone work barely half of what you pay for — which is why quoting one when you mean the other misleads badly.

Why can't I have high occupancy and high service level at once?

Because answering calls quickly requires agents sitting idle waiting for them. Service level is bought with spare capacity, and spare capacity is exactly what low occupancy looks like. A queue staffed to answer 95% of calls within 20 seconds will necessarily run lower occupancy than one staffed to 70%.

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