A mortgage interest chart is a tool that many people do not pay much attention to. The truth is that they will probably only see it twice during the life of their mortgage, when they first take out the mortgage and at the end of the mortgage when they are considering the mortgage payoff. It is a helpful tool that shows you how the monthly mortgage payment is broken down over time, during the mortgage's life. This chart will give the amount of the interest, the amount of the principal amounts paid, and the to-date totals.

There are two ways to calculate these chart figures, you may do it manually using a complex formula, or you may use an online calculator. If you look at your current mortgage statement, the interest chart may have been already included. If that is not the case, you can use the statement information, to arrive at the chart figures yourself. The columns in the statements will provide a chronological order of the dates and amounts that is paid in every payment cycle.

The interest amount paid in a payment period shown in the interest column. The same applies to the principal amount of the loan, it too would show amounts to be paid in the payment period. There is an interest to-date column of values, and that represents the accumulated interest paid to that time.

In the last column, the outstanding amount of the principal is shown. At the beginning of the mortgage's life, a larger portion of the monthly payment per payment period, will go towards interest. However, with time, a greater and greater percentage of the monthly payment amount will go towards the principal sum loaned.

The times between payment cycles is sometimes noted in a column in some charts; the interest rate may also be stated in its own column, and that rate may change from time to time if the interest is a variable rate; a column may also be included for monthly cycle payment amount.