What Is an Adjustable Rate Mortgage?

An adjustable rate mortgage (ARM) is a home loan with an interest rate that changes periodically after an initial fixed-rate period. ARMs are named for their structure — for example, a 5/1 ARM has a fixed rate for the first 5 years, then adjusts once per year after that.

During the initial fixed period, ARM rates are typically lower than fixed-rate mortgage rates. This makes ARMs attractive for buyers who want lower payments now and have a plan — selling, refinancing, or paying off the loan — before the adjustment period begins.

Common ARM Structures

The most common ARM structures you’ll encounter in Scottsdale:

• 5/1 ARM — fixed for 5 years, adjusts annually after that

• 7/1 ARM — fixed for 7 years, adjusts annually after that

• 10/1 ARM — fixed for 10 years, adjusts annually after that

• 5/6 ARM — fixed for 5 years, adjusts every 6 months after that

Each has caps on how much the rate can increase at each adjustment (periodic cap) and over the life of the loan (lifetime cap). For example, a 2/2/5 cap structure means the rate can rise no more than 2% at the first adjustment, 2% at each subsequent adjustment, and no more than 5% above the initial rate over the life of the loan.

When Does an ARM Make Sense in Scottsdale?

ARMs make sense in specific situations:

• You plan to sell within 5–7 years — a common scenario for Scottsdale buyers who may relocate or upgrade

• You expect to pay off the loan early through a large windfall or inheritance

• You expect rates to drop and plan to refinance before the adjustment period

• You want maximum buying power for a higher-priced property and can manage the risk

• You’re a sophisticated borrower who understands rate caps and worst-case payment scenarios

ARM vs. Fixed Rate in Today’s Market

The decision between an ARM and a fixed rate depends heavily on the current rate environment and your individual timeline. When the spread between ARM and fixed rates is small (less than 0.5%), the stability of a fixed rate usually wins. When the spread is larger (0.75%–1.5%+), an ARM becomes more compelling for the right buyer.

Mark Merry runs the numbers on both scenarios for every buyer who asks — showing exactly what each costs month-by-month and in total over your expected ownership period.

Get the Right Mortgage Structure for Your Situation

Not every buyer needs a 30-year fixed rate. And not every buyer should take an ARM. The right choice depends on your timeline, risk tolerance, and financial goals.

Mark Merry has 30+ years of experience helping Scottsdale buyers choose the right loan structure. Call (480) 442-7487 for an honest, no-pressure conversation about which option fits your situation best.