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Showing: Purchase, Good (720-739), 7-year ARM, Single family home, Primary residence
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A Beginner’s Guide to 7-Year ARMs
Last updated on December 14, 2023
Written by 
Holden Lewis
Senior Writer/Spokesperson
Michelle Blackford
Reviewed by 
Holden Lewis
Written by 
Senior Writer/Spokesperson
Michelle Blackford
Reviewed by 

What is a 7-year ARM?

A 7-year adjustable-rate mortgage is an adjustable-rate mortgage (ARM) with an interest rate that is initially fixed for seven years. After seven years are up, the interest rate can change periodically with the broader market.

The initial fixed interest rate is typically at a low introductory level. After the initial fixed period, the rate can adjust up or down every six months. The rate adjustments are tied to a benchmark interest rate index. In most cases, the index is the secured overnight financing rate, or SOFR. This rate tends to rise when the economy is expanding and to fall when the economy weakens.

The 7-year ARM's name may vary by lender. Some institutions call it the 7/6 ARM, where the "7" refers to the starting fixed-rate period in years, and the "6" refers to the number of months between rate adjustments. It may sometimes be called the 7y/6m or 7yr/6mo ARM. It used to be called the 7/1 ARM because the rate was adjusted annually before regulatory changes were made.

7-year ARM mortgage rates

NerdWallet’s mortgage comparison tool can help you find competitive 7-year ARM rates today, whether you are buying a home or refinancing. In the filters above, enter details about the loan you’re looking for, and you can see rate quotes without providing personal information.

When to consider a 7-year ARM

A 7-year ARM makes sense if you plan to refinance your mortgage or sell your house before the introductory rate expires. You might be able to qualify for a larger loan because of the low introductory rate. Keep in mind that the interest rate and monthly payment could increase if the index rate rises anytime after the first seven years are up.

ARM glossary

  • Index: The benchmark rate that when added to the margin yields each six-month period's interest rate. Most ARMs use the 30-day average secured overnight financing rate (SOFR), which reflects market conditions.

  • Margin: A number of percentage points that the lender adds to the index to arrive at the interest rate you'll pay during a six-month period. For example, an index rate of 5% plus a margin of 2.75 percentage points would mean your interest rate would be 7.75%.

  • Rate cap: The maximum amount your loan’s interest rate can go up or down the first time it adjusts and each time thereafter.

Learn more about adjustable-rate mortgages:


About the author: Holden is NerdWallet's authority on mortgages and real estate. He has reported on mortgages since 2001, winning multiple awards.

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