The phrase "monthly minimum" refers to the lowest amount of money you are required to pay each month for a particular service or payment plan. Full definition
The repayment of a credit card will take forever with reliance on making monthly minimum payments only. (effectify.com)
$ 7 monthly minimum balance fee if you fall below the minimum required balance. (greatsouthernbank.com)
Failure to make monthly minimum payments by the payment due date each month will result in negative reporting to your credit report which will not improve your credit history. (republicbank.com)