An adjustable rate mortgage, or ARM, is a home loan whose interest rate can change over time. It often starts lower than a comparable fixed rate, which is appealing, but the rate can rise later. Understanding the mechanics helps you decide whether an ARM fits your plans.
How an ARM is structured
Most ARMs are described with two numbers, such as 5/1 or 7/6:
- The first number is the fixed introductory period in years.
- The second number is how often the rate adjusts after that — annually, or every six months.
During the intro period, your rate and payment are stable. After it, the rate resets based on a benchmark index plus a set margin.
Rate caps protect you (to a point)
ARMs come with caps that limit how much the rate can move:
- An initial cap on the first adjustment.
- A periodic cap on each later adjustment.
- A lifetime cap on the total increase over the loan.
Caps soften the risk, but your payment can still rise meaningfully once the fixed period ends.
When an ARM may fit
An adjustable rate mortgage can make sense if you expect to sell or refinance before the intro period ends, or if intro rates are meaningfully lower than fixed options. It is riskier if you plan to stay long term and could not absorb a higher payment later. Compare advertised mortgage offers and weigh an ARM against a fixed rate before deciding.
Frequently asked questions
What does 5/1 ARM mean?
The rate is fixed for the first five years, then adjusts once a year afterward based on an index plus a margin, within the loan's caps.
Is an ARM riskier than a fixed-rate mortgage?
It carries more uncertainty because the rate can rise after the intro period. A fixed rate trades a potentially higher starting rate for predictability.
Can I refinance out of an ARM?
Often yes, subject to qualifying and closing costs. Many borrowers plan to refinance or sell before the adjustment period begins.
Disclaimer: GoFunding.Shop is an advertising marketplace, not a lender, bank, broker, credit-repair company, or financial advisor. We do not approve applications, set rates, or guarantee funding. Always confirm the full terms — APR, fees, and repayment schedule — directly with the advertising company before you apply.