The term "monthly bills" refers to a set of expenses that are incurred on a regular basis, typically once every month. These could include various types of payments such as rent or mortgage, utility bills (electricity, water, gas), phone and internet services, cable TV subscription, insurance premiums, credit card balances, loan installments, among others. The phrase is commonly used to describe the routine financial obligations that an individual or a household has to meet on a monthly basis in order to maintain their standard of living and keep up with essential expenses.