Variables in Microsoft Excel are a method of assigning a numerical value, equation or formula to a shorter name, cell reference or function. For example, if you have a long equation such as "y=mx+b" you can assign it a short value to minimize the number of times you type that equation into Excel.
Fortunately, Excel can be used to create an amortization schedule. The amortization schedule template below can be used for a variable number of periods, as well as extra payments and variable interest rates.