Mortgage Manager calculates the cost of a mortgage and allows you to compare mortgages and the effect of different interest rates and overpayments. It is designed for the UK market, but may work for other country's mortgage systems.Use Mortgage Manager to create an icon for each mortgage you are evaluating, then enter values such as the mortgage amount, fixed/discounted/capped/cashback rates and the interest calculation period as well as one-off administration costs. Payment details are then calculated with a month-by-month break-down of the payments and the running total. You can modify the interest rate and add over-payments to see their effect on the costs. Different mortgages can then be compared to see which is cheapest over various periods of time. But why do you need it? Because it's not possible to know which is best without calculating payments. Try this: Which is cheaper? (1) A 3 year fixed rate of 5.1% with a setup fee of 100 and then a variable rate of 6.5%, or (2) A 5 year fixed rate of 5.5% with a setup fee of 300 and then a variable rate of 6.5%? If you don't know, then you need Mortgage Manager to save you money.