What is abandonment rate?
Abandonment rate measures the share of callers who give up before speaking to an agent. A call is counted as abandoned when the customer hangs up after entering the queue but before an agent answers.
The usual formula is abandonment rate = abandoned calls / calls offered x 100. Most contact centres set a short threshold, commonly a few seconds, below which a hang-up is treated as a misdial and excluded, so the measure reflects genuine abandonment.
It is mainly a phone metric, but the same idea applies to webchat, where customers close the chat window before an agent responds.
Why abandonment rate matters
An abandoned call is a customer who wanted something from you and didn’t get it. That has several knock-on effects:
- Frustration and lost trust. Customers who give up are less satisfied and more likely to complain, post publicly or switch provider.
- Repeat demand. Most abandoned callers ring back. That means abandonment doesn’t reduce workload; it often increases it, because the same person may count as several calls.
- Unresolved risk. On utility fault lines, an abandoned call might be someone reporting a fallen line or a medically dependent consumer whose power is off. On some lines, abandonment is a safety measure as much as a service one.
- Lost revenue. For sales and bookings lines, abandoned calls are often lost business.
What drives abandonment
Abandonment is closely tied to wait time. As average speed of answer rises and service level falls, more callers drop out. Other factors include:
- Unclear expectations. Callers who don’t know how long they’ll wait tend to give up sooner. Position-in-queue or estimated wait messages can help.
- Long or confusing IVR menus. Customers may hang up before they even reach the queue.
- The reason for calling. Customers with urgent or high-value issues wait longer; those with simple questions give up quickly and may try a website instead.
- Sudden spikes. A call avalanche after a storm or outage can push abandonment from a few percent to a large share of calls in minutes.
How to reduce abandonment rate
- Match capacity to demand. Accurate forecasting through workforce management is the foundation for normal peaks.
- Offer a callback. Queue callback lets callers hang up without losing their place, which turns would-be abandons into answered contacts.
- Answer routine calls automatically. An AI voice assistant can answer simple requests at any volume, keeping queues short for calls that need a person.
- Add overflow capacity. Overflow call handling and surge capacity cover peaks that can’t be staffed for in-house.
- Reduce avoidable calls. Proactive outage notifications and clear self-service information answer common questions before customers ring.
- Call back abandoned callers. Where caller ID is available, some organisations proactively return abandoned calls, especially on urgent lines.
Tracked by interval and alongside wait time, abandonment rate is one of the most honest indicators of whether customers can actually reach you.