How to Calculate Monthly Expenses for a Mortgage

Lenders use the Household Expenditure Method (HEM) based on your family size and income because it is considered unreasonable for someone to spend less than HEM each month. To get the average, add up the amount of money spent for 12 consecutive months, then divide by 12. This will give an average of how much has been spent per month. Calculating average monthly expenses usually begins with listing all living costs