What it means
When running a business, every interaction with a customer costs money. This includes the wages of your support staff, the software subscriptions they use, and the overhead expenses for your office or call centre.
Cost Per Contact measures these total expenses divided by the number of interactions handled over a specific period. This metric matters because it highlights how efficiently your team operates.
If your cost per contact is too high, it might mean your processes are too slow, your staff are spending too much time on simple queries, or you are using expensive communication channels for routine issues. Businesses use this metric to find the right balance between cost and customer satisfaction.
While lowering the cost per contact is usually a key goal, you must be careful not to damage the quality of the service. If you rush customers just to lower costs, satisfaction levels might drop, leading to lost business.
To improve this figure, many companies introduce self-service options like frequently asked questions pages or automated chatbots. These tools handle simple questions cheaply, allowing human staff to focus on complex problems where their expertise adds real value.
Think of it like a post office counter. The rent, heating, and staff wages add up to a daily total.
Divide that total by the number of parcels handed over, and you get the cost of serving each customer.
In practice
Real-world examples
Example 1
An online fashion startup spends $5,000 a month on its customer service team. The team handles one thousand phone calls and emails from shoppers. This gives a cost per contact of $5. When the team starts answering returns questions with a help page, the number of contacts falls and the cost per contact rises, so the manager also tracks total cost.
Example 2
A local plumbing business spends $800 monthly on a telephone answering service. The service handles two hundred booking enquiries from clients, resulting in a cost per contact of $4. The owner compares this with the cost of hiring a part-time receptionist before deciding to keep the service.
Example 3
A software firm spends $12,000 a month running a technical helpdesk. The team resolves fifteen hundred support tickets, leading to a cost per contact of $8. The firm finds that a quarter of tickets are password resets and moves these to an automated tool.
Think of it
Think of it like a post office counter. The rent, heating, and staff wages add up to a daily total. Divide that total by the number of parcels handed over, and you get the cost of serving each customer.
Formula
Calculation
Cost Per Contact = Total Operating Costs / Total Number of Contacts
Worked example 1. A monthly customer service department costs $10,000 and handles 2,000 customer contacts, so the calculation is $10,000 / 2,000 = $5.00 per contact.
Worked example 2, by channel. A support team has these monthly figures:
- Phone: $12,000 of cost for 1,200 contacts = $10.00 per contact
- Email: $6,000 of cost for 2,000 contacts = $3.00 per contact
- Chat and self-service: $2,000 of cost for 1,000 contacts = $2.00 per contact
- Overall: $20,000 / 4,200 contacts = $4.76 per contact
If 400 phone contacts move to email at the same unit costs, phone costs 800 x $10.00 = $8,000, email costs 2,400 x $3.00 = $7,200 and chat stays at $2,000. The total falls to $17,200 and the overall cost per contact falls to $17,200 / 4,200 = $4.10, with no change in the number of customers served.Case study
Seen in the real world
This is a fictional, illustrative scenario. BrightHome, a medium-sized homeware retailer, noticed that its customer service expenses were rising rapidly every quarter. The finance director decided to track the cost per contact to understand where the money was going. They discovered that their customer service team was spending an average of $12 for every contact, mostly answering basic delivery tracking questions over the phone. To address this, BrightHome invested in a self-service tracking portal and an automated email system for standard shipping updates.
Customers could now find their delivery status instantly without speaking to a team member. Six months later, total support costs had decreased, and the phone team handled fewer routine calls, focusing instead on complex product returns and faulty items. The total number of customer contacts actually rose because the new system made it easier to reach out, but the overall cost per contact dropped to $6. This change saved the company thousands of dollars annually while keeping customer satisfaction scores high. The figures show the scale of the saving.
Before the change, 5,000 contacts a month at $12 cost $60,000. Afterwards, 6,000 contacts a month at $6 cost $36,000, including the running costs of the portal. That is a monthly saving of $24,000, or $288,000 a year, even though the team handled 1,000 more contacts.
Watch out
Common mistakes
- Ignoring the quality of the customer interaction and focusing only on making the cost as low as possible.
- Leaving out hidden overhead costs, such as software licences and staff training, when calculating total expenses.
- Treating all contact types as equal, even though phone calls usually cost much more than automated emails or chats.
Questions
People also ask
What is considered a good cost per contact?
There is no single good number because it varies widely by industry, product complexity, and the communication channel used.
Should I try to make my cost per contact as close to zero as possible?
No, because driving the cost down too far usually means cutting service quality, which can frustrate customers and harm your reputation.
Does this metric apply to sales as well as customer support?
Yes, you can use it to measure the cost of sales outreach calls or website enquiries as well as post-purchase support.