Popular Call Centre Metrics: The 10 KPIs That Matter Most
Contact centres are among the most measured workplaces on earth, so the hard part was never finding popular call centre metrics — it's choosing the right ones, using them well, and understanding how they interact. Popular is not the same as important.
Because roughly three in four contact centre leaders start their careers on the phones, many inherit a legacy scorecard and a set of targets without the why behind them. This guide cuts through the noise so your scorecard drives performance — not behaviour you never intended to reward.
Key takeaways
- There is no universal "standard" scorecard — your metric mix should reflect your channels, demand, technology, staffing model and customer expectations.
- Never judge performance on a single metric in isolation. The best KPIs are linked, and a move in one ripples through several others.
- Benchmarks are context, not targets. An industry average tells you where you sit, not what you should aim for.
- Several "agent" metrics — AHT, Abandonment, Occupancy — are largely driven by process, technology and staffing, not individual effort. Fix the system before you coach the person.
Contact centre standards and benchmarks
There's no single global "standard" scorecard you can copy-paste. But in Australia there are two high-value sources that provide evidence and context for what "good" looks like — and, just as importantly, how to use it intelligently.
Annual benchmarking (self-reported)
The Australian Contact Centre Industry Best Practice Report aggregates KPI and practice data from hundreds of centres. It's useful for understanding trends, ranges and peer comparisons across GOS, AHT, FCR, occupancy and shrinkage.
Independent assessment (outside-in)
The Australian Call Centre Rankings evaluate real customer experiences against the Australian Call Centre Quality Standards across 80+ metrics via mystery shopping — how service is actually delivered, not just how it's reported.
How to use both together
Benchmark reports tell you where you sit; service standards tell you what customers feel. Use them together to pick KPIs that balance operational efficiency with customer outcomes.
The modern contact centre: more than calls
Today's leaders juggle people, technology, budgets, analytics, compliance and stakeholder expectations while delivering outcomes across multiple channels — phone, email, live chat, SMS and proactive messaging, written correspondence, social media, chatbots and virtual agents, and (in some industries) video or co-browse support.
Each channel has different demand patterns, handle times and quality expectations, which means the "right" KPIs vary by mix. Keep that in mind as we step through the most popular metrics below.
The KPIs Australian managers value most
In the 2026 Australian Contact Centre Industry Best Practice Report, managers rated how important each metric is to them. Customer Feedback (NPS, CSAT and similar) topped the list by a clear margin — 63% called it "very important" — followed jointly by Average Speed of Answer and Abandonment Rate (46% each), First Interaction Resolution (43%), Average Handle Time (35%), After Call Work (32%), Grade of Service (30%), Sales / Conversions (24%) and Shrinkage (23%).
The overlap is the point
There's plenty of overlap between that list and our top ten below — but remember, no single KPI tells the whole story. The skill is combining the right metrics for your mix of channels, demand and business goals.
The top ten call centre KPIs and metrics
Here's what I believe are the most popular and widely used call centre metrics today.
I can't stress this enough: never judge performance by a single metric in isolation. The best leaders look for patterns, relationships and cause-and-effect.
Most KPIs on this list are linked — a shift in one ripples through several others. Understanding those connections is where experienced managers make their mark.
Didn't make the cut (but still worth tracking)
Narrowing to ten was tough. Adherence, Absenteeism, Hold Time, NPS, Customer Effort Score, CSAT, Forecast Accuracy, Employee Satisfaction and Calls Blocked all matter too — you'll find definitions, pros/cons and usage tips in the ACXPA CX & Call Centre Glossary.
How the metrics connect
No KPI lives in isolation — a shift in one ripples through the rest. Read them as a system, not a checklist:
Push one lever — say, cut staff to save cost — and occupancy climbs, service level drops, abandonment rises and quality slips. That chain reaction is the whole reason to read metrics together.
📞 1. Service Level (Grade of Service)
Service Level is the percentage of contacts answered within a set number of seconds. It's the globally recognised measure of accessibility, and it applies across every channel — voice, chat, even email response windows.
In Australia you'll often hear the voice-specific version called Grade of Service, or "GOS", written as "80/30" — 80% of calls answered within 30 seconds. Same idea, local name.
It's popular because it's easy to grasp and immediately says something about the experience you're offering.
But here's the truth: there is no universal industry-standard target. Some sectors — emergency services, certain regulated industries, government contracts — have mandated targets. In most cases, yours should be set to your own business requirements.
Emergency services
Might aim for 100/5 — 100% answered within 5 seconds — because lives depend on it.
Sales-driven lines
Often aim high to minimise lost revenue from callers who hang up while waiting.
Service / complaint lines
May tolerate longer waits if resolution quality is the higher priority.
The target isn't the hard part — meeting it is (2026 Best Practice Report)
80/30 remains the most widely adopted target — the industry baseline, not an aspirational stretch.
Yet across the centres that reported both a target and a result, roughly three-quarters fell short of their own goal. Of 14 centres targeting 80/30, only three met it.
So read benchmarks as context, not a target to copy — and treat your own target as a planning input, not a reporting footnote. The centres consistently hitting theirs win on forecasting discipline and real-time management, not simply more staff.
Find your own target
Use the free online Erlang C Calculator to model scenarios: if volume rises 10%, how many extra agents to hold your SL? If AHT drops 30 seconds, how many fewer agents? If budget is cut 15%, what happens to SL? The calculator also previews the deeper modelling tools inside the Workforce Management (WFM) Hub.
⏱️ 2. Average Speed of Answer (ASA)
Average Speed of Answer is the average time it takes for answered calls to reach an agent. If answered calls take 25 seconds on average, your ASA is 25 seconds. It matters because relying only on Service Level (e.g. 80/30) hides what happened to the other 20% — but ASA has traps of its own.
✕ What ASA hides
- It excludes abandons. Callers who hang up before an agent answers aren't in the average — pair ASA with Abandonment Rate or you get a flattering half-truth.
- Averages hide pain. A 25-second ASA can still have a long tail of callers waiting 5+ minutes.
✓ How to read it well
- Add a 90th-percentile or longest-wait view to expose outliers.
- Define where your clock starts (queue entry vs including IVR) and use it consistently.
- Track alongside Service Level, Abandonment and Occupancy for cause-and-effect.
Industry ASA for voice (2026 Best Practice Report)
What this means
The gap between a 149-second average and a 55-second median is the whole lesson. Most centres answer reasonably fast, but a long tail of slow-answering operations drags the average up — exactly the outlier problem percentiles are built to expose.
For an outside-in view, the Australian Call Centre Rankings capture actual wait time from live mystery shops. Across 2025 the industry answered 91.3% of calls within 10 minutes, with an average wait of 1:49.
That isn't ASA — it includes everyone, abandons included — but it's a strong indicator of the experience customers actually feel.
📉 3. Abandonment Rate
Abandonment Rate is the percentage of callers who enter a queue but hang up before they're connected. In the 2026 Best Practice Report it sits right near the top of the metrics managers value — 46% rate it "very important", level with Average Speed of Answer — because it's often the clearest signal that service levels, staffing or routing need attention.
How to calculate it
Abandoned Calls ÷ Total Incoming Calls = Abandonment Rate. If 100 calls join the queue and 10 hang up before reaching an agent, your abandonment rate is 10%.
When a higher abandonment rate isn't bad
Not all abandons are negative. If an IVR or hold message resolves the customer's need — say a recorded outage update — hanging up can mean they got what they needed without using an agent's time. "We're aware of the outage, power back within 30 minutes" earns a happy hang-up, not an annoyed one.
Benchmarks & 2025 rankings data
The 2026 Best Practice Report puts the self-reported voice abandonment average at 9%, with a median of 5% (and a range from 0% all the way to 45%). The lower median again signals a long tail of poor performers dragging the average up. Sector-wise, Automotive and Insurance sit lowest (5–6% average) while Education and Healthcare run highest (10–12%). For the outside-in view, the Australian Call Centre Rankings measure what customers actually experienced across 2025: the industry answered 91.3% of calls within 10 minutes, but the worst sector — banks — answered only 74.4% within 10 minutes, including home-loan enquiries.
Queue experience is a lever most centres underuse — even hold music affects patience. Our article on the science of call centre hold music covers the psychology, and if you want to upgrade the sound of your queue you'll find audio specialists in the ACXPA Supplier Directory.
⏳ 4. Average Handle Time (AHT)
Average Handle Time measures the average duration of an interaction from start to finish: Average Talk Time plus After Call Work (wrap-up).
If an agent spends 180 seconds talking and 60 on wrap-up, AHT is 240 seconds.
What really drives AHT — and it isn't just the agent
It's a mistake to treat AHT purely as an agent performance metric. Much of it sits outside the agent's control:
- System speed and reliability
- The number of screens or apps needed to resolve a query
- Mandatory scripts and compliance checks
- Process and policy complexity
- How quickly other departments supply information
Improving AHT usually means fixing process and technology — not coaching people to "go faster."
With self-service and automation now handling simple queries, the calls reaching agents are more complex — which is why AHT is trending up industry-wide. The 2026 Best Practice Report puts the Australian voice average at 537 seconds — just under nine minutes — with the slowest sector's median reaching 593 seconds.
Spot the outliers before you coach
One of the fastest ways to improve AHT is to find the individual or process outliers skewing your average.
The WFM Hub includes an Outlier Detection Wizard that flags agents or teams operating outside normal ranges, so you can coach fairly (member tool — see Where to Next below).
Example: the Outlier Detection Wizard flags an agent operating well outside the normal range.
🧮 5. Shrinkage
Shrinkage is the percentage of paid time agents are not available to handle contacts because they're in other activities — training, coaching, meetings, breaks, or leave. It's a cornerstone of workforce planning because it directly affects how many staff you need to hit your Service Level.
Why it matters
- Underestimate it and you'll be under-staffed — queues blow out.
- Overestimate it and you'll be over-staffed — budget wasted on idle time.
- It's a non-negotiable input for accurate Erlang calculations and rostering.
Practical example
Shrinkage % = (Total Paid Time Lost ÷ Total Paid Time) × 100.
Take one full-time agent with 261 paid working days in a year. Here's where the time actually goes:
| Activity | Days lost |
|---|---|
| Annual leave | 20 |
| Sick / personal leave | 10 |
| Public holidays | 8 |
| Training | 5 |
| Coaching | 5 |
| Team meetings | 2 |
| Total time lost | 50 days |
So: 50 ÷ 261 × 100 = 19% shrinkage. Only 81% of that agent's paid time is actually available for customer contacts.
The lesson: plan your staffing against the available time — never against 100% of paid hours, or you'll be short every single day.
✅ 6. First Call Resolution (FCR)
First Call Resolution is the percentage of enquiries fully resolved in a single interaction, with no need for the customer to contact you again about the same issue within an agreed window. It's powerful — and easy to get wrong.
Define FCR before you measure it
- Time window: 3, 7 or 30 days (shorter for billing, longer for claims/technical).
- Contact scope: phone only, or email, chat, social and app messages too?
- Reason logic: match repeats by customer ID + reason code, not just phone number.
- Transfers: decide and document whether same-day warm transfers that resolve count as FCR.
Operational FCR
(Interactions with no repeat within X days ÷ total eligible interactions) × 100. Example: 5,220 of 7,200 eligible calls had no repeat within 7 days → FCR 72.5%.
Survey FCR
Ask on the post-contact survey: "Was your issue fully resolved today?" The % answering "Yes" is Survey FCR. Use both — operational shows behaviour, survey shows perception, and any gap is diagnostic gold.
📊 7. Occupancy
Occupancy is the percentage of logged-in, available time agents spend actively handling contacts (talk + hold + ACW). It's a core efficiency measure — get it wrong and you either waste budget (too low) or burn people out and blow out queues (too high).
How to calculate it
Occupancy % = (Contact Handling Time ÷ (Contact Handling Time + Available Time)) × 100. Spend 80 hours on talk/hold/ACW and 20 hours available → 80 ÷ 100 = 80%. Most centres aim for 80–85% as the sustainable sweet spot.
💲 8. Cost per Call (Cost per Contact)
Cost per Call is the average cost of handling each interaction: Total Operating Cost ÷ Total Contacts. A $1,000,000 operating cost across 40,000 calls is $25 per call. It's great for internal decisions — targets, business cases, channel mix — but rarely apples-to-apples across organisations.
Count it "fully loaded"
Include salaries and on-costs (agents, leaders, WFM, QA), technology and licences, premises or WFH stipends, training, coaching and recruitment, vendor/BPO fees, and a sensible share of overheads. Track the trend over time — the direction matters more than the absolute number — and look at cost per resolved contact for a truer efficiency view.
🔄 9. Employee Attrition (Turnover)
Employee attrition — or turnover — is the percentage of your workforce that leaves in a period: (leavers ÷ average headcount) × 100. Twelve leavers across 100 FTE in a year is 12% annual attrition.
It's often read as a signal of engagement, leadership and organisational health — but not all attrition is bad.
✓ When it can be healthy
- Underperformers exiting lifts overall capability.
- Internal moves to other roles — good for the business, even if it stings the centre short-term.
✕ When it's costly
- Recruitment and training costs rise; productivity dips until new hires reach proficiency (often 6+ months).
- Inconsistent CX and morale drop as remaining staff absorb the workload.
Industry snapshot
Frontline agent attrition fell to 25% in 2026 — its best result in recent years, down from 29% in 2025. Larger centres have historically run much higher (some size bands above 40%), though several of those bands dropped sharply in 2026. Note too that very low attrition can hurt — stagnation, rising wage costs with tenure, and embedded workarounds.
⭐ 10. Call Quality
Call Quality is how you define, measure and improve the standard of service agents deliver. Everyone agrees it matters — teams stumble when turning "quality" into something objective, calibrated and actionable.
Compliance metrics
Did the agent follow defined processes, scripts and legal/regulatory requirements (ID verification, mandatory disclosures)?
Performance metrics
How skilful and effective was the interaction — rapport, problem-solving, a positive outcome? Many "quality" programs only measure compliance, missing the bigger customer-experience picture.
Anchor it to a standard
So "quality" isn't subjective, anchor your program to an agreed framework. ACXPA uses the Australian Call Centre CX Standards — a practical, outside-in view of what great looks like.
Use behavioural rubrics rather than vague 1–5 stars, and calibrate regularly between QA, team leaders and operations so a score means the same thing everywhere.
How many calls should you assess?
There's no global standard. In practice, 5–15 calls per agent per month — chosen at random and stratified by reason or queue — gives useful coaching signals without drowning the team.
Don't guess the number. Size your sample properly with the free QA Sample Size Calculator; members can model confidence levels and margin of error in the advanced version.
The rise of AI in QA
AI QA brings huge coverage — up to 100% of interactions — plus faster insights and searchable transcripts.
But it still needs a solid rubric mapped to your standards, human calibration loops, and privacy and consent settings nailed down. AI surfaces issues at scale; coaches still turn them into behaviour change.
And pair quality with FCR and customer feedback — high polish with poor resolution is theatre, not quality.
From scores to action: the Agent Performance Matrix
Quality only changes behaviour when it's read alongside productivity. The ACXPA Agent Performance Matrix (APM) plots each agent's quality score against a productivity score on a four-quadrant grid — top performers, fast but rough, thorough but slow, and needs support — so coaching effort lands where it will actually move the needle.
The Simple tier is included with an ACXPA Business Membership. The deeper ACXPA Certified tier — a per-call assessment against the five-competency framework (Engage, Discover, Educate, Close, Impact) — is a separate licence, bundled with training and accreditation through the Certified Contact Centre program. You'll find both, alongside QA benchmarking, in the Coaching & Performance Hub.
For an external perspective, the ACXPA Call Quality Assessment service scores your calls against the Australian Call Centre CX Standards, and Contact Centre CX Benchmarking puts your results in context. Exploring QA and CX tech? Browse Call Centre Technology in the ACXPA Supplier Directory.
The traps that undo good metrics
Chasing a single number
Optimising one KPI in isolation almost always distorts another. Cut AHT and watch FCR and repeat contacts move. Read the system, not the number.
Treating benchmarks as targets
An 8% industry abandonment average or an 80/20 Service Level is context — where others sit — not a goal you should adopt without modelling your own demand and budget.
Weaponising operational metrics at the agent level
AHT, Abandonment, Occupancy and Cost per Call are largely driven by process, tech and staffing. Holding individuals to account for them breeds gaming, not improvement.
Hiding behind averages
A healthy ASA or Occupancy average can conceal a painful long tail. Use percentiles and interval-level views to see what customers and agents actually experience.
Frequently asked questions
What are the most important call centre metrics?
The most widely used are Grade of Service, Average Speed of Answer, Abandonment Rate, Average Handle Time, Shrinkage, First Call Resolution, Occupancy, Cost per Contact, Attrition and Call Quality. But "most important" depends on your channels, demand and goals — the right answer is a balanced set, read together, not a single headline KPI.
Is there a standard target for Service Level or Abandonment Rate?
No. There's no universal standard. Common Australian Service Level targets include 80/20 and 80/30, and the 2026 self-reported voice abandonment average was 9% (median 5%) — but these are context, not targets. Your Service Level should be modelled to your demand and budget, and abandonment is an outcome of that, not a number to chase in isolation.
Should AHT be an individual agent KPI?
Generally no. Much of what drives AHT — system speed, number of applications, mandatory scripts, process complexity, information from other teams — sits outside the agent's control. Use AHT to find process and outlier issues, then fix the system. Balance it with First Call Resolution and Call Quality so you don't reward rushed, unresolved calls.
How many metrics should a contact centre track?
Fewer than you think, chosen deliberately. Track a small core that covers customer experience (e.g. Service Level, Abandonment, FCR, Quality), efficiency (Occupancy, AHT, Cost per Contact, Shrinkage) and people (Attrition) — and make sure you understand how they influence one another rather than reporting dozens in isolation.
What's the difference between self-reported benchmarks and independent assessment?
Self-reported benchmarking (like the Best Practice Report) tells you where you sit against peers on the numbers centres report themselves. Independent assessment (like the Australian Call Centre Rankings, via mystery shopping) measures what customers actually experience. Use both: one shows your reported position, the other shows the felt reality — and the gap between them is often the most useful insight.
Can a higher abandonment rate ever be a good thing?
Sometimes. If an IVR or hold message resolves the customer's need — for example a recorded outage update — a caller hanging up satisfied is a good outcome, not a failure. That's why abandonment should always be read alongside why callers left and what they heard while waiting.
Where to next
Related articles
Final thoughts
Congratulations on making it through the full list. Hopefully you've now got a clearer picture of the measures that genuinely help you improve performance — and why "popular" and "important" aren't the same thing.
No KPI lives in isolation. A high Grade of Service can lower abandonment and occupancy while raising staffing costs; a low AHT can quietly wreck First Call Resolution. The experienced leader's edge is reading those relationships, not chasing individual numbers.
Like most professional skills, knowledge is power. Keep learning, keep testing, and keep talking to other leaders about what's actually working. At ACXPA we exist to help you do exactly that — connecting contact centre professionals across Australia with practical tools, benchmarking, training and industry insights.
- About the Author
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After spending over 30 years working in contact centres and CX, one thing I’ve learnt is there is always something more to learn!
I’m thrilled to be the inaugural CEO of ACXPA, and together with the rest of the team, we’re focused on helping Australian businesses deliver efficient and effective customer experiences via phone, digital and in-person by empowering their employees with the skills, industry insights and professional support networks they need to succeed.
