Abandonment rate is a contact center measure of the share of customers who give up before reaching an agent: callers who hang up while waiting in a queue, or chat users who close the window before an agent joins. It is usually expressed as a percentage of contacts that entered the queue. A rising abandonment rate is one of the clearest signs that customers are waiting longer than they will tolerate.
At a glance
- Abandonment rate is abandoned contacts divided by contacts offered to the queue.
- Short abandons (callers who hang up within a few seconds) are often excluded, and companies set their own threshold.
- It typically rises when staffing falls short of demand or when handle times increase.
- Callbacks, wait-time announcements and better scheduling are common ways to reduce it.
- In outbound dialing, “abandoned call” has a separate meaning that may be limited by regulation.
What problem it solves
Customers who give up waiting are often the ones with a reason to call: an order to place, a problem to fix, a payment to make. Some call back later, adding to volume; some switch to another channel; some simply leave. Without measuring abandonment, a contact center sees only the customers it served and misses the ones it lost.
Abandonment rate makes that lost demand visible. Combined with average speed of answer (ASA), it shows how customers respond to wait times. Broken down by queue and time of day, it tells managers when staffing is short, which feeds back into workforce management (WFM) forecasts and schedules.
How it works
The contact center platform records when each contact enters a queue and whether it is answered, transferred or abandoned. Abandonment rate is then calculated for each queue, interval, channel or day.
Choices that change the number:
- Short-abandon threshold. Callers who hang up within a few seconds may have dialed the wrong number; many centers exclude them.
- Where the clock starts. Callers who hang up in the IVR menu, before entering a queue, may or may not count.
- Self-service. Customers who complete their task in the IVR or with a bot shouldn’t be counted as abandoned.
- Callbacks. Customers who accept a virtual hold callback leave the queue on purpose; they should be tracked separately.
Abandonment usually rises when contact volume exceeds what scheduled agents can handle, or when average handle time (AHT) increases and agents stay busy longer. Common responses include adjusting schedules, offering callbacks, announcing expected wait times so customers can decide, routing overflow to other teams, and moving simple requests to self-service.
Outbound abandonment. When an outbound dialer places more calls than there are free agents, some people answer and find no one there. These are also called abandoned calls. If no agent connects within the applicable time limit, the call may count as abandoned. In the US and some other jurisdictions, regulators limit the abandonment rate and require a recorded message in that event; playing the message does not remove the call from the abandonment calculation. The rules depend on the jurisdiction and type of call, so check with counsel.
When it matters for buyers
- When customers complain about waiting, or sales teams suspect calls are being lost.
- When choosing a contact center platform, because callback, queue announcement and reporting features vary.
- When outsourcing or setting service levels, where abandonment is a common contractual measure; agree on the definition up front.
- When running outbound campaigns, where dialer abandonment needs to be monitored for compliance.
Our contact center as a service page covers queueing and reporting features to compare.
Questions to ask vendors
- How does your platform define an abandoned contact, and can we set the short-abandon threshold?
- Are callers who hang up in the IVR, or who choose a callback, counted separately?
- Can we report abandonment by queue, interval, channel and wait time before abandoning?
- What callback and expected-wait-time announcement features are included?
- For outbound: how does the dialer measure and limit abandoned calls, and can it play a message when no agent is free?
How it differs from average speed of answer (ASA)
Average speed of answer (ASA) measures how long answered customers waited. Abandonment rate measures how many customers didn’t wait long enough to be answered. The two are best read together: a low ASA can look good while many callers abandon, because the ones who gave up don’t count in the answered average. Most contact center reporting shows both side by side.