. You are in the process of buying your first home and are at the closing. You see on the disclosure form the total interest for the life of the loan. You are not sure of the figure and want to double check the figure. The home's price is $199,500. you are getting a traditional 30 year mortgage with an APR of 4.5%, will make all monthly payments on time, but will not prepay any of the principal. Finally, no other fees or taxes are included in the financing. The down payment on the mortgage is 10%. The total interest paid on the loan would be $132192.34 $147,961.25 $137.907.72 $144,692.47