Adjustable Rate Mortgage or (ARM) is a form of loan in which the interest paid by the borrower varies according to changes in the market. This change can be reflected on a three months, six months or yearly basis on the loan interest amount. This means the monthly mortgage payment will not be the same throughout the loan payment. It may increase or decrease depending on the amount of interest that has to be paid.

Many people take up an ARM because it offers a lesser interest rate at the time of loan taking than a fixed rate mortgage. As a result, their loan interest payment up to the point wherein the interest rate changes apply is less. If the interest rate drops further the loan applicant the benefit by having further lower interests to pay than before. This means they can save up more money towards payment for the principal, plus the borrower does not have to go in for refinancing to take advantage of lower interest rates. On the other hand, if the interest rates rise and go to the extent of being higher than what is seen in a fixed rate mortgage, the applicant loses and will have to shell out more money on monthly loan repayments.

The ideal candidate for an ARM is someone who is sure of paying off the entire loan amount in period of three to five years. The fluctuating interest rates will not be so bothersome for such people and they would have paid off the entire loan amount in a short while, thus having zero outstanding financial obligations.

Those who are considering taking an ARM must be well aware of the financial obligations associated with taking an ARM. They should be aware that if the interest rate rises, accordingly their monthly interest and loan amount repayment, will also rise and they should be sure that they have the necessary financial strength to pay off such rises in interest rate, otherwise they cannot keep up their monthly payments and as a result they will have to pay a foreclosure.