Abandonment rate calculator
See how many callers and chat visitors leave before you answer, what it costs you, and how many your target would win back. Free, no sign-up.
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The formulas
How to calculate abandonment rate
Abandonment rate is the share of calls or chats that reached your queue and left before an agent answered.
Before and after your service level threshold
Lost contacts, value and the what-if
9.18%
(220 − 40) ÷ (2,000 − 40) = 9.18%
11% if you count the 40 short abandons.
150 calls
220 − 70 = 150
7.5% of all offered calls waited past the target and then left.
+82 answered
180 − 0.05 × 1,960 = 82
About 55 calls you would otherwise lose, worth $2,460.
Definitions
Service level: three common definitions
Service level is the share of contacts answered within your threshold, for example 80% within 20 seconds. The answer changes a lot depending on what you divide by.
| Definition | How abandons count | In the example |
|---|---|---|
| 1. ÷ offered | Every abandon counts as a miss | 1,350 ÷ 2,000 = 67.5% |
| 2. ÷ offered without short abandons | Abandons count as a miss, except the first few seconds | 1,350 ÷ 1,960 = 68.88% |
| 3. ÷ answered | Abandons are left out | 1,350 ÷ 1,780 = 75.84% |
Definition 1 is the strictest and the one Call Centre Helper gives as the basic formula. Definition 3 is the one SQM Group gives, and it can look good while many customers hang up, because the people who left are not in it.
Phone systems add their own variants. Cisco Unified Contact Center Enterprise, for example, lets you choose whether calls abandoned within the threshold are ignored, counted against you or counted in your favour. If your service level and abandonment rate seem to disagree, check which definition your report uses before you change anything.
To see how many agents you need to reach a service level, use the Live Chat Staffing Calculator. This page measures what already happened.
Interpretation
How to read your result
The headline rate tells you how many customers gave up. The other numbers tell you why and what it costs.
The gap between the two rates
If the rate with short abandons is much higher than the rate without them, many contacts leave almost at once. Look at your phone menu, your chat widget and wrong numbers before you hire anyone.
Within or after the threshold
If most abandons happen after your service level threshold, customers waited and ran out of patience. That points to too few agents at busy times. If most happen early, customers may not like what they hear or see first: a long recorded message, a form before the chat, or no sign of a wait time.
Service level and abandonment together
A low abandonment rate with a weak service level means patient customers, not a good queue. A good service level by definition 3 with a high abandonment rate means the people who stayed were fast, while many others left.
The outcome bar
The bar splits every offered contact into answered in time, answered late, abandoned within the threshold, abandoned after it and other outcomes. Green should be the longest part.
Intervals
A weekly rate can hide one bad hour. If one interval holds a large share of all abandons, move breaks, shifts or an AI agent to cover that time first.
Lost value
The value is only as good as your value per contact. Use average order or deal value multiplied by the share of contacts that buy, not the full order value. For a support line, use the cost of a repeat contact or a cancellation instead.
Worked example
One week of calls, step by step
A support line receives 2,000 calls in a week. Its target is to answer within 20 seconds and to keep abandonment at 5% or less.
220 callers hung up before an agent answered. 40 of them hung up within 5 seconds, and 70 in total within 20 seconds. 1,350 calls were answered within 20 seconds. The team later reached 60 of the callers who hung up. One lost call is worth about $45 to the business.
1. Answered: 2,000 − 220 = 1,780 (89%)
2. Abandonment rate, all abandons: 220 ÷ 2,000 = 11%
3. Without short abandons: (220 − 40) ÷ (2,000 − 40) = 180 ÷ 1,960 = 9.18%
4. Abandoned within 20 s: 70 ÷ 2,000 = 3.5% of offered
5. Abandoned after 20 s: 220 − 70 = 150; 150 ÷ 2,000 = 7.5% of offered
6. Service level ÷ offered: 1,350 ÷ 2,000 = 67.5%
7. Service level ÷ answered: 1,350 ÷ 1,780 = 75.84%
8. Lost calls: 180 − 60 = 120, worth 120 × $45 = $5,400
9. Allowed at 5%: 0.05 × 1,960 = 98, so 82 abandons above target
10. Kept at 5%: 82 × (120 ÷ 180) = 54.7 calls, worth $2,460
So 68% of abandons (150 of 220) came after the 20-second target. This team mainly needs more people answering at busy times, not a shorter phone menu. The intervals show where:
| Interval | Offered | Abandoned | Short | Rate without short |
|---|---|---|---|---|
| 08–10 | 250 | 12 | 3 | 3.64% |
| 10–12 | 420 | 38 | 7 | 7.51% |
| 12–14 | 480 | 92 | 12 | 17.09% |
| 14–16 | 380 | 40 | 8 | 8.6% |
| 16–18 | 300 | 26 | 6 | 6.8% |
| 18–20 | 170 | 12 | 4 | 4.82% |
The lunch hours from 12 to 14 hold 80 of the 180 abandons that count, 44%. Covering that block, for example with staggered lunch breaks, does more than adding a person all day.
Press Show example in the calculator to load these numbers, including the intervals, and change any of them.
Benchmarks
What is a good abandonment rate?
Only figures we could trace to a named source on November 7, 2026. None of them says how short abandons were treated, so compare them with care.
Phone: about 5%, lower is better
SQM Group, a contact center research firm, writes that the industry average call abandonment rate is 5% and, in a separate article, that the industry standard is 6%. It adds that below 5% is generally good and that most centers with great customer satisfaction have 3% or less. SQM does not publish the data behind these figures, so treat them as a rule of thumb.
Talkdesk's 2021 benchmarking report, as reported by CXM Magazine, found that the average abandonment rate across its customers rose from 4.21% to 5.91% during 2020, when the pandemic pushed call volumes up. The report itself is behind a sign-up form, so we could not check the method.
Short abandons
SQM Group writes that false abandons happen within the first 10 seconds and can be up to 2% of call volume. That is why a rate with and without short abandons can differ by a full point or more.
Live chat: no reliable benchmark
We found no published chat abandonment benchmark with a clear method and data set. Many pages quote numbers without a source. Compare your chat rate with your own last months and with your phone rate, measured the same way.
Service level: 80/20 is a convention
SQM Group and Call Centre Helper both describe 80% of calls answered within 20 seconds as the usual phone standard. SQM argues that from the customer's point of view a better measure is the share answered within 120 seconds. Pick a threshold your customers accept, not only the familiar one.
Avoid these
Common abandonment rate mistakes
Most disagreements about abandonment rate come from counting different things. Check these before you compare teams or tools.
Not saying how short abandons are treated
Some systems include them, others remove them, and the threshold can be 5, 10 or 20 seconds. Genesys Cloud, for example, includes short abandons in its abandon rate, while Talkdesk removes them from inbound contacts when the short-abandon setting is on. Write the rule next to the number.
Setting the short-abandon threshold too high
Call Centre Helper describes a center that only counted calls abandoned after 20 seconds. That makes the rate look better without helping a single customer. Keep the threshold short and fixed.
Leaving out phone menu abandons
Callers who hang up in the phone menu never reach the queue, so most queue reports do not show them. Call Centre Helper cites one company that found 18% of calls were abandoned in the menu. Track menu abandons as a separate number.
Counting voicemail or callbacks as abandons
A caller who chooses voicemail or a callback did not give up on you. Put them under other outcomes, so they lower neither the answered rate nor inflate abandonment.
Mixing up missed and dropped chats
In Zendesk, a missed chat is one where the visitor leaves before any agent reply. That is chat abandonment. A dropped chat is one where the visitor leaves after talking to an agent. It is a different problem and does not belong in this rate.
Looking only at the monthly average
A 6% month can be 3% most of the time and 20% at lunch. Use the interval table to find the hours that need cover.
FAQ
Abandonment rate questions
What is abandonment rate?
Abandonment rate is the share of calls or chats that reached your queue and ended before an agent answered. 220 abandoned out of 2,000 offered is an 11% abandonment rate.
How do you calculate call abandonment rate?
Divide abandoned calls by calls offered to the queue and multiply by 100. To exclude short abandons, subtract them from both numbers first: (abandoned − short abandons) ÷ (offered − short abandons).
What is a short abandon?
A short abandon is a call or chat that ends within a few seconds of entering the queue, usually 5 or 10. Many are wrong numbers or accidental clicks, so many teams leave them out of the abandonment rate. Always state the threshold you use.
What is a good call abandonment rate?
SQM Group calls 5 to 6% the industry average and says most call centers with great customer satisfaction have 3% or less. These are rules of thumb without published data, so compare yourself with your own past months first.
What is chat abandonment rate?
Chat abandonment rate is the share of chats where the visitor leaves before any agent replies. In Zendesk these are called missed chats. Chats where the visitor leaves after talking to an agent are dropped chats, a different metric.
How is service level different from abandonment rate?
Service level is the share of contacts answered within a time threshold, such as 20 seconds. Abandonment rate is the share that left before an answer. They move together, but a service level calculated only over answered contacts can look good while many customers hang up.
Should abandoned calls count in service level?
It depends on the definition. Dividing by all offered contacts counts every abandon as a miss and is the strictest. Dividing by answered contacts leaves abandons out. This calculator shows three versions side by side so you can see the difference.
How do I reduce abandonment rate?
Find the hours with the most abandons, then add cover there, offer a callback instead of a long wait, show the expected wait time, and let an AI agent answer simple questions at once so fewer people wait in the queue at all.
Does the calculator store my data?
No. Everything runs in your browser. The share link keeps your numbers in the address after the # sign, which is not sent to our server.
References
Sources
- Abandon rate formula, short abandons, phone menu abandons, and the 20-second example: Jonty Pearce, Call Centre Helper, "How to Measure Call Abandon Rate", modified September 30, 2025
- Service level formula ÷ offered, 80/20 and Cisco's three abandon methods: Jonty Pearce, Call Centre Helper, "How to Calculate Contact Centre Service Level", modified January 23, 2026
- Service level ÷ answered and treatment of early abandons: Amelia Colquhoun, SQM Group, "Contact Center Service Level: How Is It Calculated?", April 22, 2025
- 5% industry average, 3% or less with great CSAT, false abandons up to 2% of volume: Mike Desmarais, SQM Group, "What Is Abandoned Calls Rate?", November 16, 2022
- 6% industry standard, 80% in 20 seconds and the 120-second view: SQM Group, "Industry Standards for Top Call Center KPIs", January 19, 2023
- Talkdesk 2021 benchmark, 4.21% to 5.91%: CXM Magazine, "What does Talkdesk's 2021 global contact centre report have to teach us about benchmarking?", February 17, 2022
- Three service level calculations for abandoned calls: Cisco, "How to Perform Service Level Calculation", updated November 15, 2020
- Abandon rate with and without the short-abandon setting: Talkdesk Support, "Abandon Rate", checked November 7, 2026
- Abandons include short abandons, flow-outs are not abandons: Genesys Cloud Resource Center, "What type of situations do abandons include in Genesys Cloud?", checked November 7, 2026
- Missed and dropped chats: Zendesk Help, "What is the difference between dropped chats and missed chats?", checked November 7, 2026
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