10 Important Call Center KPIs to Monitor

Aksheeta Tyagi

July 16, 202410 min read

Share this Article

Immersed in the hectic routine of a call center, it's easy to lose sight of the bigger picture.

The art of customer service isn’t just about handling complaints, it’s also about building customer relationships and turning single transactions into lasting engagements. 

That's where tracking the right call center key performance indicators (KPIs) can guide you through the chaos.

Call center KPIs measure your achievements, expose areas for improvement, and drive accountability. Armed with these insights, you can make informed strategic decisions that boost revenue for you and your end clients.

In this article, we shed light on 10 crucial call center KPIs that can serve as a guiding light in the competitive and chaotic call center space.

10 call center KPIs to track

Here are the 10 call center KPIs to foster a thriving customer-centric environment:

1. Net Promoter Score (NPS)

The Net Promoter Score or NPS reveals how strongly a customer feels about your services, and functions as a loyalty meter. It is a tool for measuring your customers' loyalty and serves as a barometer for your brand's popularity.

It simply sums up responses to one crucial question, namely, "How likely are you to recommend a company to a friend or colleague?" The responses are marked on a scale of 0-10.

Let's take a look at how customer responses can be categorized based on the Net Promoter Score (NPS):

  • Promoters: These are the real champions of your brand. They give a glowing score of 9-10 and genuinely endorse your brand with enthusiasm and support.

  • Passives: Customers in this category give a score of 7-8. They may not be actively promoting your brand, but they're also not speaking negatively about it. They fall somewhere in the middle, with a neutral stance.

  • Detractors: Unfortunately, there are customers who score 0-6, indicating they are not satisfied or happy with their experience. These individuals have the potential to impact your brand's image if they resort to public forums to express their negative opinions. That's why it's essential to address their concerns and turn their perception around.

The NPS score is derived from this simple formula:


The resulting figure serves as a clear indicator of customer satisfaction. It may be a number, but it tells a story about customer experience, loyalty and brand perception.

2. Customer Satisfaction Score (CSAT)

At the heart of every call center lies one guiding beacon, the Customer Satisfaction Score. It's the litmus test of your service quality, mirroring the level of contentment among your customers post-interaction.

To compute your CSAT score, you can ask your customers to fill out a survey form, rating their product/support experience on a pre-defined scale. A sample survey question can be "On a scale of 1-10, how satisfied do you think you are with our brand's support?"

Based on the scores, respondents can be classified into different categories such as:

  • Very Satisfied: This indicates that the customers had a fantastic experience with your service and they are extremely satisfied. You probably exceeded their expectations and turned them into your enthusiastic brand advocates

  • Satisfied: Customers in this category had a good experience with your service. They are content and feel that their expectations were met. While they may not be raving fans, they are generally happy with the service you provide. 

  • Neutral: These customers had an average experience. They neither feel strongly positive nor negative about your service. It was satisfactory but didn't leave a lasting impression. It's important to note that they may be easily swayed by other options. 

  • Unsatisfied: Unfortunately, these customers had a less than satisfactory experience. They expected more and feel let down by your service. Addressing their concerns and finding ways to improve their experience is crucial to retaining these customers.

  • Very unsatisfied: These customers had a highly unsatisfactory experience. They are deeply dissatisfied and may even be frustrated or angry. Their negative feedback can significantly impact your brand's reputation. It's essential to address their concerns promptly and provide effective solutions.

    Read More: 19 Proven Tips to Handle Angry Customers

AdobeStock 563157528 (1)

Understanding and addressing customer feedback across these categories can help improve your service and cultivate positive experiences.

To calculate your CSAT score objectively, use this easy formula:


Remember, this number is not just a score but a narrative – a tale of your team's ability to delight customers.

Therefore, engage, understand and keep delivering service that brings smiles. After all, a satisfied customer is your best advocate.

💡 Pro Tip: There’s ONE solid way to minimize poor CSAT scores — and that’s through AI-powered foresight. Before you even deploy a survey, a conversational analytics tool can scan interactions in real time and accurately predict CSAT by detecting keywords that convey certain sentiments — alerting the agent to take action in case it identifies negative connotations in customer speech.

Sprinklr conversational analytics detects intent and sentiment

See how state-of-the-art AI-driven analytics bring all the context, emotional or functional, right to you from every customer conversation.  

3. First Call Resolution (FCR)

The performance of a call center revolves around many variables, but one metric that stands out is First Call Resolution or FCR.

Simply put, FCR is the percentage of customer issues resolved during their first call. It's the magic moment when a customer sighs with relief, as their problem is solved without follow-up or the need for an escalation.

The essence of FCR is captured in this formula:


But why does FCR matter? Because it reflects the principle of "doing it right the first time." It prevents the frustration of multiple callbacks or transfers, creating happier customers.

So, keep an eye on FCR. Make it your guiding star.

Curious about improving your FCR? Check this video out👇

4. First Response Time (FRT)

First Response Time can be likened to your customer's first impression of your call center. It measures the wait time for a customer before an agent attends to their call. 

Imagine stepping into the shoes of a customer, eagerly reaching out for assistance. What would you hope for? A warm welcome, right? Well, that's exactly what the First Response Time (FRT) aims to achieve.

Calculating the FRT involves a simple formula:


But let's dig deeper and explore why it matters.

In today's fast-paced world, an immediate response feels like a comforting embrace. Whether it's a live chat support or a phone call, customers expect quick resolutions. They want their questions answered, their concerns addressed and their needs met promptly. 

However, FRT is not just about speed; it's about understanding the customer's thirst for instant help and meeting it head-on. Improving customer response times sets the tone for a hopeful customer journey and also contributes to an overall happier experience. 

Think about it – when you receive a quick response, it's as if someone is right there, ready to assist you. It fosters a sense of importance that your needs are heard and acknowledged. This immediate attention can be a powerful catalyst for customer satisfaction. 

So, strive to keep your FRT minimal. Embrace the challenge of providing rapid assistance and watch as your customers' satisfaction levels soar. Remember, a swift response is often the crucial first step toward creating a delightful customer experience.

Ever feel like you’re always racing against time to respond to your customers?

This free eBook offers a fresh perspective on how to tackle the chaos that comes with customer service using a unified AI-driven platform. Discover practical, relatable strategies to not just keep up but stay ahead. 

⏰ Enabling customers to help themselves 24/7

⚡ Empowering agents to deliver fast, contextual responses

🔀 Matching the right agents to specific cases quickly

📚 Helping managers develop needs-based coaching plans

5. Percentage of Calls Blocked

The Percentage of Calls Blocked is a crucial metric on your customer service scorecard. It represents the proportion of incoming calls that encounter a busy signal, signaling potential issues in handling call volumes and customer satisfaction. 

Here's how to calculate this metric:


Imagine the frustration of dialing a number, eagerly seeking assistance, only to be met with a maddeningly persistent busy signal. It's like hitting a brick wall for your customers and a missed opportunity for you to connect, assist and create a positive experience.

That's precisely why you should care about this call center KPI – the Percentage of Calls Blocked. It's not just a cold, impersonal number on a spreadsheet. It represents the very essence of human sentiment, reflecting the missed chances to provide support and make someone's day a little brighter.

A high percentage here is a glaring sign that something needs attention. Perhaps your call center is understaffed, leaving customers hanging in frustration. Or maybe your call center software is struggling to handle the call volume, leading to missed connections. 

By tracking this crucial KPI, you gain insight into the pulse of your customer experience. It becomes a tangible measure of how well you're meeting their needs. Remember, every blocked call signifies a missed opportunity to create a happier customer experience. So, strive to lower this metric and keep the lines open for meaningful connections. 

Read More: How Voice Bots Help You Tackle High Call Volumes

6. Call Abandonment Rate

The Call Abandonment Rate KPI refers to the number of customers who disconnect before reaching an agent. 

The formula to calculate this call center KPI is:


Being stuck on hold as a customer is not just frustrating, but disheartening. When customers hang up, it signifies a potential loss of trust in your brand's service.

The call center KPI of abandoned calls is a paradox – a low rate doesn't guarantee high customer satisfaction. Each abandoned call is an opportunity for improvement. Reflect on the reasons behind them: excessive wait times, lack of information or something else. Use these insights to bridge the gap and create an experience that builds trust and leaves customers satisfied.

💡Pro Tip: Use conversational IVR software to ensure no customer waits too long or hangs up frustrated. Unlike static IVR, it greets your callers with a friendly voice, quickly grasps their needs, and guides them to the right expert — no detours.

Your agents get a complete brief, so they’re ready to dive deep without missing a beat. It can also automatically schedule callbacks to customers they might lose mid-calls.

And if the only way to help a customer better is on a different channel, the cross-channel switch can be seamless with a robust conversational IVR solution.

Sprinklr conversational IVR seamless case routing

7. Average Speed of Answer (ASA)

As a customer, waiting for a call to be answered can feel like an eternity. Time seems to stretch endlessly, and impatience starts to creep in. That's why call centers monitor the Average Speed of answer — the average time it takes for calls to be answered. 

Here's the formula:


ASA isn't just about holding music; it covers the time spent waiting in queue till the agent picks up the call. Though it excludes the interactive voice response (IVR) system navigation time, it clearly shows the team's efficiency.

It's similar to First Response Time (FRT), spotlighting the swift addressing of customer calls. However, ASA carries a specific weight. It conveys how quickly your team moves to bring a hopeful resolution to a customer's concern.

8. Average Handle Time (AHT)

One of the most crucial call center KPI is Average Handle Time. This is the total duration, on average, that an agent spends with a customer.

The calculation is as follows:


AHT is a valuable gauge to set performance benchmarks for the entire team and to identify who may need more customer service coaching.

It's a metric that matters: a low AHT can indicate efficiency, leading to better productivity and happier customers. However, it's essential to balance this speed with quality solutions. After all, the aim is to help customers effectively, not rush them through the process.

💡 Pro Tip: To lessen average handle time, consider implementing customer service workflows. What are they, you ask? A customer service workflow is a standardized process that guides agents through each customer interaction with precision. Automating and structuring each step, significantly slashes the time agents spend handling issues, enabling them to resolve queries faster and more efficiently.

See how an agent follows a step-by-step process while interacting with a customer reporting an issue with their phone charger using Sprinklr Service Guided Workflows👇

Sprinklr guided workflows in action

Dive deeperCustomer service coaching tips

9. Customer Effort Score (CES)

Customer Effort Score is a critical call center KPI that measures how much effort a customer has to put in to get their issue resolved. 

It's based on this simple question:

"On a scale of 1 to 7 (7 means 'Strongly Agree' and 1 signifies 'Strongly Disagree'), did our service make it easier for you to solve your problem?"

The score is then calculated as follows according to the customer responses:


The ultimate goal is to minimize customer effort. Factors such as long queue times and frequent transfers can increase customer effort, negatively impacting the CES. On the other hand, having well-trained agents who efficiently address customer needs can significantly reduce customer effort, leading to an improved CES. It's all about creating a seamless experience where customers feel supported and their problems are resolved with minimal hassle.

In essence, CES reflects how straightforward it makes the customer resolution process.

Customer effort is 40% more accurate at predicting customer loyalty as opposed to customer satisfaction.

Andrew Schumacher

Senior Principal, Advisory

Therefore, it's crucial to consistently meet customer expectations, not merely exceed them for a slight boost in loyalty.

10. Customer Churn Rate (CCR)

Keeping a pulse on the Customer Churn Rate is vital in the call center KPI scorecard. This metric reveals the percentage of customers who've stopped using your services within a specific period.

Use this formula to calculate the CCR:


If your CCR is high, it's a sign that your customers are not satisfied with your service, possibly due to unresolved issues or poor communication.

Agent performance plays a crucial role in reducing CCR. Agents are your business's voice and face, and their ability to address customer complaints effectively can significantly reduce the customer churn rate.

👉 Bonus Read: Top Customer Service Metrics to Track

Concluding note

To achieve success in the call center industry, it is crucial to prioritize customer satisfaction, agent performance, and operational efficiency. Tracking call center KPIs is essential for optimizing call center operations and delivering exceptional customer experiences. By focusing on the above-mentioned call center KPI examples, you can identify areas for improvement and drive meaningful results.

A unified call center solution like Sprinklr Service offers a unified agent desktop for agents to access all caller information at one glance and shorten the wait time. In addition, automated workflows enable your agents (even new ones) to deliver quick answers in the first go, keeping your CSAT high and churn low at all times.

Still skeptical? Take Sprinklr on a free spin for 30 days and discover how it can help your organization elevate its customer experience strategy.

Frequently Asked Questions

Share this Article

Related Topics

Important Call Center KPI Benchmarks by Industry How to measure call center productivityCall Center Reporting Guide for Businesses