An integral part of the formula to successfully buying a home is securing the correct amount of financing. Once you’ve found the home you’d like to pursue, one of your primary tasks is exploring different loan products to see which best fits your situation. Eventually, you’ll come to a fork in the road where you’ll need to decide between a fixed-rate mortgage and an adjustable-rate mortgage (ARM). The following information will help you gain a better understanding of ARMs to help you decide whether they’re right for you.

What Is an Adjustable-Rate Mortgage (ARM)?

After your down payment, your mortgage will finance the remainder of your home purchase. Whereas fixed-rate mortgages allow you to lock in a specific interest rate and payment for the life of your loan, adjustable-rate mortgages’ interest rates will fluctuate over time, thus changing your loan payment. It’s typical for ARMs to begin with a low introductory interest rate, but once that first stage of the loan has passed, they will begin to shift up and down. ARMs generally have a cap that specifies the maximum rate that can occur for that loan.

Let’s say you secure an adjustable-rate mortgage with 30-year terms, the first five of which are at a fixed rate. When the variable interest portion of the loan kicks in, your mortgage’s fluctuations will be measured against an index. If the index is higher than when you secured the loan, your rate and loan payment will go up—and vice versa. How often your ARM rates change depends on your agreement with your lender. Talk to your mortgage broker to learn more about the characteristics of adjustable-rate mortgages.

A mortgage broker shakes hands with a man and a woman as they secure the terms of their adjustable-rate mortgage

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Different Types of Adjustable-Rate Mortgages (ARMs)

Payment-Option ARM: You’ll have flexibility to choose your monthly payments with a payment-option ARM, including interest-only payments and minimum payments that don’t cover interest. These loan products can get home buyers into hot water quickly when rates increase.

Interest-Only ARM: With an interest-only ARM, you pay just the interest on the loan for a specified introductory period, then the principal payments kick in on top. The longer the introductory period, the higher your payments will be when the delayed principal payments enter the equation.

Hybrid ARM: As outlined above, a hybrid ARM begins with a fixed-rate introductory period followed by an adjustable-rate period. Typically, a hybrid ARM’s fixed-rate period lasts anywhere between three to 10 years, and its rates adjust at an agreed-upon frequency during the adjustable-rate period, such as once every six months or once a year.

Pros and Cons of an Adjustable-Rate Mortgage (ARM)

Pros	Cons
The low introductory rate allows you to save money and plan for when the adjustable-rate period kicks in.	If you plan to live in the home for a long time, a fixed-rate mortgage may be a better option.
If you plan on selling in a few years, you can use the proceeds to pay back your mortgage before the fixed-rate period ends.	Without knowing what will happen to interest rates, your monthly payments could become unaffordable.
If the index decreases over time, you could end up with a lower interest rate and monthly payments.	Financial planning is more difficult with an ARM, since there’s no telling what your monthly payments will be one year to the next.

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