The billing increment is the smallest unit of time you are charged for. The better cards divide the minute by 10 and give you a 6-second billing increment. For others it may be one minute or more. If you plan to make more than a few calls on one card, this can make a significant difference in your real pre-minute cost.
For example, your billing increment is 6 seconds and you make a call that lasts 66 seconds, you are charged for 66 seconds. However, if the billing increment is 1 minute, you will be charged for 2 minutes, or 120 seconds. This is almost double!
Typically, on the average, you will be charged for an extra 30 seconds each call if your billing increment is 1 minute, compared to a billing increment of 6 seconds. These half minutes can really add up if you make very many calls, especially if they tend to be shorter calls.
If your card has a billing increment greater than 6 seconds, use our PHONE CARD COST CALCULATOR to see how this affects your REAL cost per minute.
Read the fine print! If you don't find it there, it could be anything!