When it comes to incurring the expense of setting up and using a conference call service, the charges can vary. Most companies that provide these services will vary what they charge based on how large your meeting is and the how long the meeting will last. This can become quite pricey for something like a board meeting or stock analyst meeting which will involve several participants and may last for several hours. In order to take away some of that burden, there are some conference call service companies that are beginning to offer a flat rate for their services. They will charge a certain amount per minute of use no matter how many participants there are, how many bridges are used, and how long the conference call lasts.