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Home » Articles » Track & measure service excellence: Top 20 customer service KPI

Track & measure service excellence: Top 20 customer service KPI

Track & measure service excellence Top 20 customer service KPI

What is KPI in customer service?

Key performance indicators (KPIs) are important in measuring whether a business performs well in terms of different aspects such as finances, product quality, and marketing.

Business process outsourcing companies also use these to measure how good their performance is in serving customers, especially in support services.

Call centers follow standard customer service KPI in measuring the quality of service they give for every call. However, businesses should also know and be aware of these for several reasons.

  • Performance monitoring. One of the reasons for outsourcing customer service is to improve the support given to the customers. With this, businesses should keep track of their call center’s performance through the customer service KPI.
  • Budget tracking. This is also important whether they hire their call centers on-demand or monthly. Measuring the customer service KPI helps customer service agents to track the average call duration for each customer and the extra charges they concur if applicable.
  • Process improvement. Tracking the customer service KPI helps customer service agents improve the process of their support team. Streamlining calls, simplifying processes, and defining the product better help their team solve customer issues in a shorter period.

Call centers use a lot of KPIs in different industries and conditions. With this, businesses should only look out for what will apply to their operations.

What is KPI in customer service?

The role of customer service teams

Customer service teams play an integral role in the success of any business. They are the face of the company, providing customers with the support they need to make informed decisions and build trust in the brand.

They also offer great customer service with a timely response and accurate information, resolve customer issues, and create a general positive brand image.

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Good customer service teams are essential for any business to offer solid customer support and maintain customer loyalty. They offer initial responses regarding customer complaints and inquiries through different communication channels.

Additionally, they help maintain a good customer satisfaction score in business. Customer service teams can also identify improvement areas and provide feedback to the company on how to serve their customers better.

Customer service metrics

Customer service metrics are a vital part of any business, and they provide valuable insights into customer satisfaction, loyalty, and overall customer experience.

By tracking customer service metrics, companies can identify areas of improvement and make necessary changes to ensure customer satisfaction.

  • Average resolution time – this metric help businesses identify areas of improvement and ensure that customer issues are resolved quickly and efficiently.
  • Customer effort score – tracking customer effort scores can identify areas of improvement. Firms can make changes to ensure customers don’t have to put in too much effort to get their issues resolved.
  • Customer satisfaction KPI – this is one of the most important customer service metrics. It measures how satisfied customers are with the service they receive. This can be measured through surveys, customer feedback, and customer service ratings.

20 Important customer service KPIs

Below are some of the most important customer service key performance indicators that businesses should measure.

Inbound customer service KPIs

When a business wants to measure how their inbound customer and technical support perform, they use the following indicators to measure the duration and quality of their calls.

1. First response time

Quality customer service should be speedy. This is why call centers measure first response time to determine how quickly an agent responds to their first issue.

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An issue does not require to be resolved right away to measure this. According to a study, customers prefer having their issues responded to immediately, even if it’s not been resolved yet.

Customers simply need assurance that an agent looks over their concerns to feel that they are taken care of by the business.

2. Average speed of answer

Calls are also measured depending on how quickly an agent picks up a call. The average speed of answer (ASA) determines the team’s efficiency, performance, and accessibility by answering the phone. However, this indicator can be difficult to interpret.

ASA is computed through the total waiting time over the total number of answered calls. Per industry standards, a team’s ASA should be 28 seconds. An agent should not be too quick or too slow to pick up a call.

3. First call resolution

First call resolution determines how efficiently an agent has resolved an issue on a customer’s first call. This aims to prevent the customer from calling back, getting transferred often, or escalating the issue.

When customers call, they are reminded that their calls are recorded to ensure their quality. This indicator is measured through the percentage of representatives resolving their issues when they first called over the total number of resolved issues in a period.

4. Average handling time

Average handling time (AHT) measures the average work to be done by the agent during and after a call. Depending on the team, a call may consist of answer speed, transfers, hold, and escalation, if necessary.

Unlike average call duration, AHT does not include ring time and queue since the latter only counts the entire transaction over the phone. However, factors such as abandoned calls and wrap time affect its calculation.

5. Escalation rate

When an agent or a department cannot initially resolve a customer’s issue, chances are they get escalated to a more appropriate team that can help them with their concern. Escalation rate measures the number of calls escalated over the total number of calls in a period.

Escalation happens either because the agent does not have enough knowledge to resolve it or because the customer asked for it to do so. Measuring this helps in lessening these incidents and providing a better service.

Escalation rate

6. Inbound abandon rate

Abandon rate refers to calls abandoned by a customer before their transaction is initiated or finished.

For inbound customer service, a customer may abandon a call before an agent picks up while on hold or in the middle of the transaction due to outside factors.

Waiting times largely affect a call. The longer the time customers wait in line, the less satisfaction a customer gets. This results in them dropping the call before or in the middle of the transaction.

7. Average call transfer rate

The average call transfer rate, meanwhile, deals with the number of times an agent transfers a call to resolve an issue.

In some cases, call transfers are acceptable especially if they serve as the virtual reception for the support team, such as in a telephone answering service.

Some calls, meanwhile, need the expertise of a different department to be resolved. For instance, invoice requests and inquiries should be handled by the accounting and finance teams.

8. Customer satisfaction rate

Customer satisfaction rate (CSAT) is the most popular way to measure a team’s customer service. This indicates how satisfied customers are with their service, if the agents approached them well, and if their issues are resolved at the end of their transaction.

Call centers use different ways to measure customer satisfaction. This includes giving scaled ratings and yes-or-no questionnaires after the call.

Nowadays, a lot of them also ask for feedback on what they should improve on their service.

9. Net promoter score

The net promoter score (NPS) is usually tied to CSAT. This measures how likely the customer will refer their assigned agent to other customers.

NPS usually includes the attitude of the agent, their professionalism in handling a call, and their courtesy toward the customer.

An agent’s performance is scaled from 1 to 10, with each rating divided into three categories:

  • Promoters (9-10)
  • Passives (7-8)
  • Detractors (0-6)

Most companies include this in an employee’s file, which counts toward their performance review.

10. SERVQUAL (Service + Quality)


A moniker of “service” and “quality,” SERVQUAL measures the overall quality that the team gave to their customers over their expectations.

SERVQUAL is determined by five elements:

  • Reliability. How consistent the team was in providing their promised service. This measures if they have met or exceeded their services given.
  • Assurance. How they build trust and confidence in their customers through their team’s knowledge and responsiveness.
  • Tangibles. The appearance and presentability of the company. For instance, its office, the employees, and their equipment.
  • Empathy. The prioritized help of agents. This measures how they reach out to the individual needs of their customers.
  • Responsiveness. How willing the team is to provide for their customers’ needs and resolve their concerns.
SERVQUAL (Service + Quality)

Outbound customer service KPIs

Usually, outbound KPIs are measured similarly to their inbound counterparts. Some of them are determined by unique factors required to reach sales and lead generation quotas.

Here are the most important outbound KPIs to measure.

11. Customer retention rate

Attracting new customers costs more for the business than retaining them. With this, businesses should keep an eye on their existing customers and how much of them remain in the business over time.

Customer retention rate deals with the number of customers loyal to the company. This helps to strengthen the relationship between customers and the company.

Now, the questions are:

  • Do customers sign up for updates?
  • Do they continuously subscribe to the services of the company?
  • How many are satisfied with the products they get?

These are a few of the qualities looked upon by this indicator.

12. Conversion rate

Conversion rate determines the number of leads converted over the total number of leads generated in a single period. This indicator is important when they handle an outbound lead generation team.

This KPI follows the ‘sales funnel’ method. For instance, of their 1000 leads a month, 500 were interested in their services, but only 250 signed up for the website, and 100 closed a sales transaction. Converted into a percentage, they will then get the conversion rate of their team.

13. First call close

Like in the first call resolution, the first call close (FCC) determines the number of sales transactions done in each customer’s first call. FCC applies to both new and existing customers contacted through lead generation.

Closing a sales transaction at first call may be difficult. However, each successful first call indicates the efficiency and good performance of an outbound team.

14. Calls per agent

Since most outbound teams have a specific quota to reach, each call done by their agents is also measured. Calls per agent indicate the number of calls and engagements done by an agent.

Calls per agent also measure their efficiency, whether they entertain or ignore customers or excuse themselves as away or idle.

15. Calls per account

Calls per account determine whether a lead should still stay in the company’s record or not. This counts the number of calls done to a single lead.

The more times they abandon a call or reject a sales offer, the more likely they will be removed since they don’t show any interest in the company’s services.

Calls per account

16. Cost per call

A part of cost-benefit analyses, cost per call indicates the amount needed to operate the team over the total number of outbound calls.

This determines the efficiency of the team and is used to control costs in running outbound call centers.

17. Outbound abandon rate

Abandonment rate for outbound is determined by the customer picking up a lead call and whenever they drop the transaction before a sales deal closes. This measures the customer’s interest in a service or product and their satisfaction in a transaction.

18. On-call rate

The on-call rate may be tied with calls per agent KPI since they both determine an agent’s average calls.

This indicator tells the average time an agent spends on calls over time spent between them. In-between call activities may include taking notes, processing transactions, and idle times.

Like calls per agent, the on-call rate determines the efficiency of an agent during call transactions, which may include hold time.

19. Call quality analysis

Call quality analysis works the same as inbound CSAT. It determines the satisfaction of a customer during a call.

Does an agent sound entertaining or intimidating? Do they provide accurate information? Are the deals convincing enough to attract a customer? These are some of its determiners.

Employee satisfaction

An agent’s performance usually reflects the level of care given by the management. The better they are taken care of, the better service they give to the customers.

This is why measuring employee satisfaction through their engagement is important.

20. Employee engagement

Employees are considered internal customers of the company. To provide a good service to their clients, they should also be taken care of by the business and their BPO company.

Employee engagement determines how the employee engages in a call or an internal operation. This covers whether they are satisfied with their line of work, with their salary, and with their work environment.

In the end, a satisfied customer support team gives out their best effort and ensures that the firm will always have satisfied customers being served.

Customer service KPI FAQ

How do you write KPI for customer service?

You should write customer service KPIs the way you write success indicators for the rest of your operations. 

First, determine your goals and objectives in hiring a customer service team. Your objectives will be your basis of the processes, successes and KPIs needed in the operation. then, determine your successes or indicators on your progress. This, meanwhile, will tell you whether you are on the right direction in achieving your goals.

Upon writing your KPI, also consider your processes and SOP. Check their performance at first and calculate the average number of calls, duration, transfers, escalations, and workload to be done so you’ll have the standards on their performance and how it should be done.

How do you measure customer service performance?

A lot of ways can be done to measure customer service performance. You can do it through measuring internal and external factors that affect this aspect of customer interaction.

Aside from internal KPI, you need feedback from your customers as well. Customer satisfaction surveys may be done through email, phone, and SMS messaging. One of the most important indicators in measuring performance is the agent’s approach. This tells how well an agent approaches a customer in a call, what their attitude is, if they have resolved an issue, and how efficient they are in resolving a call.

What is a good KPI?

A good KPI follows the SMART method for measuring goals. A KPI should act as a compass that directs a customer service team in the right way to achieve the goals of a company. To achieve this, your indicators should be measurable and attainable in a certain period. As quoted in a saying, “you can’t manage what you can’t measure.”

It should also be applied to real situations. You can’t set expectations too high or too low to achieve, since this may affect the quality of service you give to your customers. Lastly, a KPI should be time-bound. A good KPI should cover a specific period. For instance, in outbound customer service, you need to to convert X percent of leads in three months or so.

What is KPI in a call center?

Key performance indicators (KPI) in a call center is a set of metrics determined to ensure good customer service. This measures the duration of each call, transfers made, how efficiently an agent has resolved a call, and if they needed an issue to be escalated. Though call centers have standard measures for customer calls, their clients also set their metrics to track and improve the performance of their team.

Client metrics are mostly important in a call center operation. This determines if their team is doing the right thing or they need improvements on the processes. In the end, it’s not just about the measures, but how do they adjust it.

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