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Glossary · Call centre operations

What is Occupancy?

Reviewed by Sujan ThapaliyaLast updated

Definition

Occupancy is the share of an agent's logged-in time spent handling contacts, including talk time and after-call work. It measures how hard the staffed hours are working, and sustained occupancy above about 90% reliably produces burnout and attrition.
The three STIR/SHAKEN attestation levels, which underpin how occupancy behaves in practice: A asserts both that the carrier knows the customer and that the customer may use the calling number, B asserts the customer only, and C asserts neither. A shared number pool can reach B at best, which is why number ownership keeps recurring in these definitions.
Attestation is the backdrop to most caller-ID and deliverability terms, occupancy included.

In practice

How occupancy actually works

Formula: occupancy = (talk time + after-call work) ÷ logged-in time × 100.

Most centres target 80–85%. High occupancy looks efficient on a dashboard and produces longer handle times, more errors, and higher attrition within a quarter.

Occupancy and service level trade against each other: keeping queue waits short requires idle capacity by definition.

Occupancy is also the metric most easily gamed by changing what counts as available. Excluding wrap, or counting training as unavailable, moves the number without changing anyone's day. Agree the definition before the target, and publish it alongside the figure, or the trend line means nothing.

Occupancy = handling time ÷ time available to handle contacts.
OccupancyWhat it meansConsequence
Below 65%Overstaffed for the volumeCost per contact climbs
70–80%Healthy for most voice teamsRecovery time between calls survives
80–85%Busy but workableWatch quality scores
Above 85% sustainedNo recovery timeShorter calls, more transfers, attrition

Worked example

Ten agents handling calls for 6.5 hours of an 8-hour shift, with 1.5 hours of that available-but-idle, gives roughly 81% occupancy — the top of the healthy band, and the point at which quality starts trading against utilisation.

Occupancy: common questions

What is a healthy occupancy rate?
Between 75% and 85% for most voice teams. Below that and you are overstaffed for the volume; sustained above it and you get errors, shorter calls and attrition, because there is no recovery time between contacts.
How is occupancy calculated?
Handling time — talk plus wrap — divided by the time an agent was available to handle contacts. Break time and training are excluded, which is why occupancy and utilisation give different answers from the same day.
Why does high occupancy increase attrition?
Because it removes the seconds between calls that people use to reset. Sustained occupancy above the high eighties reliably produces shorter calls, more transfers, worse quality scores and higher turnover, and the cost of replacing agents exceeds the saving.

Sources

  1. Combating Spoofed Robocalls with Caller ID Authentication — Federal Communications CommissionThe STIR/SHAKEN framework, the attestation levels carriers sign calls with, and the mandate requiring providers to authenticate caller ID.
  2. 47 U.S.C. § 227 — Restrictions on the use of telephone equipment — Cornell Legal Information InstituteThe Telephone Consumer Protection Act itself — the consent requirements, calling-hours limits, and private right of action.
  3. ITU-T Recommendation E.164 — The international public telecommunication numbering plan — International Telecommunication UnionThe international number format, the 15-digit maximum, and how country codes and national numbers compose.

See occupancy in the product

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