Do you know what one handled customer inquiry actually costs your organization? Many service organizations measure volumes, waiting times, and customer satisfaction, but the actual personnel costs per contact often remain a blind spot. That is a missed opportunity, because without this insight, it is difficult to substantiate improvement potential, justify investments, or make targeted choices about automation.
In this step-by-step plan, you will learn how to calculate the costs per handled customer inquiry, how to interpret the outcome, and what you can do with it to organize your customer contact more efficiently. The calculation is simpler than you think, but the insights it yields are often surprising.
What you need for the calculation
Before you begin, gather the right data. An accurate calculation of the personnel costs per customer inquiry stands or falls with the quality of the input. You need data on both the costs of your employees and the activities they perform.
Ensure you have the following information available for the same period, for example, a calendar month or a quarter:
- Gross salaries of all employees who handle customer contact
- Employer costs (social security contributions, pension costs, holiday pay)
- Other personnel-related costs (training, workplace costs, HR overhead)
- Contract hours and the actual number of hours worked per employee
- The total number of handled customer inquiries in the same period
- Data on non-productive time (meetings, breaks, sick leave, administration)
Don’t have all the figures directly available? Then start with the data you do have and refine the calculation later. A global first outcome is already valuable as a starting point.
Calculate the total personnel costs per period
Determine the full personnel costs for the chosen period. This is more than just the gross salary. The actual costs per employee are usually significantly higher when you include all components.
- Add up the gross salaries of all employees actively processing customer contact.
- Add employer costs, on average about 20 to 30 percent on top of the gross salary, depending on your situation.
- Include costs for workplaces, licenses, telephony, and tooling if you can directly allocate them to the customer contact team.
- Add a portion of the indirect costs, such as team leaders, HR support, and training, if they are relevant to your calculation.
The result is the total personnel cost base for the period. Note this amount carefully, as this is the numerator of your final calculation. Check if you haven’t missed any major cost items by comparing the outcome with your HR or financial reporting.
Determine the number of productive contact hours
Not every minute worked is spent handling customer inquiries. A realistic picture of productive contact time is essential to arrive at a reliable customer contact KPI. In practice, this is often where things go wrong: organizations calculate with contract hours, while the actual available time for customer contact is significantly lower.
- Determine the total number of contract hours of the team in the chosen period.
- Subtract non-productive time: leave, sick leave, breaks, and team meetings.
- Also subtract indirect work time: email processing, administration, internal coordination, and training.
- What remains are the productive contact hours: the time that employees actually spend handling customer inquiries.
In practice, productive contact time at many contact centers amounts to between 50 and 70 percent of the total working time. If your outcome deviates strongly from this, that is in itself an interesting signal to investigate further. With this data, you can also calculate the average handling time per contact, which helps later when interpreting your results.
Calculate the costs per handled customer inquiry
Now that you know the total personnel costs and the productive contact time, you can calculate the cost per contact. The formula is simple, but the interpretation requires attention.
- Divide the total personnel costs by the number of productive contact hours. This gives you the costs per productive hour.
- Determine the average handling time per customer inquiry in hours, including any after-call work (ACW).
- Multiply the costs per hour by the average handling time. The outcome is the personnel costs per handled customer inquiry.
An example for clarification: suppose your total personnel costs amount to 50,000 euros over a month, your team realizes 2,000 productive contact hours, and the average handling time is 8 minutes. Then the costs per hour are 25 euros, and the costs per customer inquiry are 25 euros divided by 60 minutes, multiplied by 8 minutes: approximately 3.33 euros per contact. This is a simplified example; in your situation, multiple channels, teams, or customer groups can be calculated separately.
Validate and interpret the outcome
A calculated value is only useful if you know whether it is correct and what it means. Validate the outcome before drawing conclusions from it.
Ask yourself the following questions:
- Is the outcome intuitively correct? A cost per contact of less than one euro or more than twenty euros requires a check of the input data.
- Have you included all cost components, or have you overlooked something?
- Does the outcome differ per channel? Telephone calls are usually more expensive than chat contacts or self-service interactions.
- What is the share of repeat contact? If customers contact you multiple times for the same problem, the actual costs per solved issue rise significantly.
Also compare your outcome over multiple periods. A one-time measurement says little; a trend line shows whether you are becoming more efficient or more expensive. Through a thorough business analysis of customer contact, you can further enrich this data with insights on repeat contact, channel mix, and hidden costs.
Improve cost-efficiency based on the calculation
The calculation is not an end in itself, but a starting point for improvement. Now that you know what a customer inquiry costs, you can steer specifically on the factors that have the greatest impact.
Focus on the following improvement directions:
- Reduce the average handling time by better supporting employees with smart knowledge systems, integrated customer information, and automated after-call work.
- Increase productive contact time by reducing administrative tasks, for example via process automation. What used to be deployed as RPA, we nowadays position as Agentic AI: self-thinking assistants that do not just follow instructions, but independently take initiative and handle tasks.
- Steer on repeat contact by tackling the root cause of recurring questions, not just the symptom.
- Shift volume to cheaper channels such as self-service, chat, or automated answering, but only for questions where quality and customer satisfaction are not at stake.
Every improvement you implement can then be seen in a lower cost per contact. In this way, the calculation becomes a recurring management instrument instead of a one-time exercise.
How Pegamento helps you in making customer contact costs transparent
We help Dutch service organizations to not only calculate the personnel costs per customer inquiry, but also to understand and structurally address the underlying causes. We do that from a single point of contact, without complex supplier constructions, and with a smart combination of proven modules that connect to your processes and systems.
What we can concretely do for you:
- A thorough analysis of your current customer contact processes, channel mix, and cost structure
- Insight into repeat contact, hidden costs, and improvement potential via our business analysis methodology
- Implementation of Agentic AI, process automation, and omnichannel communication technology to structurally lower the cost per contact
- Continuous optimization and management, so that results remain secured and you do not have to deal with fragmentation again
Do you want to know what customer contact actually costs your organization and where the greatest improvement opportunities lie? Contact us and we will look at the possibilities together.
Frequently Asked Questions
How often should I recalculate the cost per contact?
For reliable management information, it is recommended to repeat the calculation at least once per quarter. Monthly measurements provide even more insight, because you can recognize trends and seasonal patterns faster. Ensure you always use the same period and definitions, so that the outcomes are mutually comparable and you build a meaningful trend line.
What if my employees handle multiple channels, such as telephone and chat? How do I calculate that?
In that case, it is wise to split the calculation per channel. Keep track of how much time employees spend per channel and allocate the costs proportionally. Telephone calls usually have a higher average handling time than chat contacts, which means the cost per contact per channel can differ greatly. This channel split gives you extra management information about where automation or channel shifting yields the most.
What common mistakes should I avoid in this calculation?
The most common mistake is calculating with contract hours instead of actual productive contact time, which causes the costs per contact to be structurally underestimated. A second pitfall is omitting indirect costs such as team leaders, HR overhead, and tooling licenses, which gives you an incomplete picture. Also ensure you don’t forget repeat contact: if customers call multiple times for the same problem, the actual costs per solved issue are much higher than your calculation suggests.
What is a realistic benchmark for the cost per contact in the Netherlands?
The cost per contact varies greatly per sector, channel, and complexity of the questions. For telephone contact in Dutch contact centers, the cost per contact lies on average between €4 and €12 per call, while chat contacts usually turn out cheaper due to the possibility of simultaneous handling. Self-service interactions often cost less than €1 per contact. Use benchmarks as a guideline, but especially compare your outcome with your own historical data for the most relevant insights.
How can I lower the cost per contact without harming customer satisfaction?
The key is to focus on questions where automation or self-service does not detract from the customer experience, such as status information, simple changes, or frequently asked questions. Additionally, invest in better knowledge systems and integrated customer information for employees, so they can help faster and more accurately. Addressing the root cause of repeat contact often yields the greatest cost savings without customers experiencing this negatively.
Can I also apply this calculation if I work with external or hired customer service employees?
Yes, the calculation is also applicable with outsourced or hired capacity. In that case, use the invoice costs of your external party as a basis instead of the internal salary costs, and ask your supplier for insight into the number of handled contacts and the productive hours. Keep in mind that with outsourcing you have less visibility into indirect time expenditure, which can affect the accuracy of the calculation.
How do I involve my management in the outcomes of this calculation?
Always present the cost per contact in combination with context: compare with previous periods, set the outcome against customer satisfaction scores, and show what the financial impact is of concrete improvements. Translate the calculation into recognizable business figures, such as the annual savings with a reduction of one euro per contact at one hundred thousand contacts per year. In this way, the calculation becomes a strategic conversation tool instead of an operational number.
