What is cost per contact?

Why it matters

Cost per contact is the traditional support finance metric and the one most likely to mislead once automation enters the picture. Automating cheap contacts raises the average cost of the remaining human contacts, which looks like a regression on this metric while total spend falls.

What to know

• Automation removes the cheapest contacts first, so human cost per contact rises by arithmetic, not by failure.
• Repeat contacts are counted separately, so a poorly resolved issue can lower your cost per contact.
• It is useful for channel comparison, since phone, chat, and email have genuinely different unit costs.
• Blend it with cost per resolution or you will optimise for cheap contacts rather than solved problems.
• Segment by channel and issue type, since a blended figure describes no real workload.

How to calculate it

An example

Example: a team automates a category of two-minute contacts. Total spend falls fifteen percent, but human cost per contact rises from six dollars to nine because only the harder contacts remain. Both numbers are correct and only one describes the outcome.

Common mistakes

• Judging an automation programme on cost per contact alone
• Blending channels with very different unit economics
• Counting repeat contacts as independent successes
• Excluding tooling and AI spend from the numerator

Questions