There are more than 10,000 Federal Deposit Insurance Corporation (FDIC) insured institutions (banks & saving institutions) in the United States and each year they are required to file a summary of their deposits. The Federal Deposit Insurance Corporation (FDIC) insured institutions annual Summary of Deposit survey was the primary source of secondary data used in this report. This report presents the findings of testing performed on mortgage calculators, specifically "Rent v. Buy" and "Save In Tax" mortgage calculators provided on and through websites of all state and federally chartered banks with a 1% or greater market share of FDIC insured bank deposits in the largest metropolitan-areas in each of the fifty (50) States.