Yes. Sending and receiving faxes uses your plan minutes similar to a phone call.
Typical Usage
Most faxes use approximately: 1 minute per page
Actual usage can vary based on:
Transmission speed
Page complexity
File quality
Number of pages
How to Monitor Usage
You can review usage in your dashboard call logs.
Heavy Fax Users
If you send or receive frequent faxes, you may benefit from a plan with more included minutes.