If you are considering a variable rate, check and compare the terms. Check the periodic cap, which is the limit on interest rate changes at one time. Also, check the lifetime cap, which is the limit on interest rate changes throughout the loan term. Ask the lender which index is used and how much and how often it can change. An index (such as the prime rate) is used by lenders to determine how much to raise or lower interest rates. Also, check the margin, which is an amount added to the index that determines the interest you are charged. In addition, inquire whether you can convert your variable rate loan to a fixed rate at some future time.
Sometimes, lenders offer a temporarily discounted interest rate -- a rate that is unusually low and lasts only for an introductory period, such as six months. During this time, your monthly payments are lower too. After the introductory period ends, however, your rate (and payments) increase to the true market level (the index plus the margin). So, ask if the rate you are offered is "discounted," and if so, find out how the rate will be determined at the end of the discount period and how much larger your payments could be at that time.
