Definitions for "Monthly fee"
A fee charged once a month.
A fixed amount of money paid to a long distance carrier on a monthly basis simply for subscribing to or using its service. Some long distance plans carry a monthly fee, while others do not. Furthermore, some long distance plans carry a monthly fee that will be waived if a specified amount of calls are made in a given month. Example: A plan has a $5 monthly fee that is waived if at least $20 of calls are made during that month.
This is a fixed fee your long-distance carrier will charge on a monthly basis in order to remain with them regardless of your call history that month.
a more accommodating approach for smaller clients whose cash flow would be strained by a large up-front payment
Keywords:  per, price
Price per month.