What are the advantages of fixed rate versus adjustable rate loans?

With a fixed-rate loan, your monthly payment of principal and interest never change for the life of your loan. Your property taxes may go up (we almost said down, too!), and so might your homeowner's insurance premium part of your monthly payment, but generally with a fixed-rate loan your payment will be very stable.

Fixed-rate loans are available in all sorts of shapes and sizes: 30-year, 20-year, 15-year, even 10-year. During the early amortization period of a fixed-rate loan, a large percentage of your monthly payment goes toward interest, and a much smaller part toward principal. That gradually reverses itself as the loan ages.

You might choose a fixed-rate loan if you want to lock in a low rate. If you have an Adjustable Rate Mortgage (ARM) now, refinancing with a fixed-rate loan can give you more monthly payment stability.

Adjustable Rate Mortgages -- ARMs, as we called them above -- come in even more varieties. Generally, ARMs determine what you must pay based on an outside index, perhaps the 6-month Certificate of Deposit (CD) rate, the one-year Treasury Security rate, the Federal Home Loan Bank's 11th District Cost of Funds Index (COFI), or others. They may adjust every six months or once a year.

ARMs often have their lowest, most attractive rates at the beginning of the loan, and can guarantee that rate for anywhere from a month to ten years. You may hear people talking about or read about what are called "3/1 ARMs" or "5/1 ARMs" or the like. That means that the introductory rate is set for three or five years, and then adjusts according to an index every year thereafter for the life of the loan. ARMs carry a high risk to the borrower and generally are not recommended.