My Perfect Mortgage
7-Year Interest-Only ARM A Comprehensive Guide
6 minute read
September 30, 2022

What is a 7-year interest-only ARM?

Most mortgages require you to pay principal and interest monthly. Not interest-only loans.

These home loans require you to pay only the interest due, tremendously reducing your monthly cost.

These loans aren’t for everyone, though. You could go years without paying down a cent of principal. And, the rate could eventually adjust upward.

But for the right kind of buyer, they could be the antidote to high rates and home prices.

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What’s in this article?

How does a 7-year interest-only ARM work?
Why do some homebuyers choose an interest-only loan?
Calculate your 7-year interest-only payment
Who are 7-year interest-only loans good for?
7-year interest-only pros and cons
IO loans: Not the dangerous loans of the past
Is a 7-year interest-only loan right for you?

How does a 7-year interest-only ARM work?

A 7-year interest-only adjustable-rate mortgage (ARM) comes with a fixed rate for seven years. Then, it can adjust with the market. This is similar to most ARM loans.

However, it comes with an additional feature, known as an interest-only option.

During the interest-only period, you’re required to pay just the interest due each month. This is different than a “fully-amortized” mortgage, for which you pay principal and interest. The interest-only feature drops your required payment significantly.

When the interest-only period is up, it will turn into a fully-amortized loan. 

For example, you could have a 7-year ARM with a 10-year interest-only period. Then, payments will adjust so that you pay off the loan over the next 20 years.

During the interest-only period, homeownership is much more affordable. You can pay down principal if you’d like, but it’s not required. 

Start your mortgage approval.

Why do some homebuyers choose an interest-only loan?

Most homebuyers choose an interest-only loan to reduce their monthly payment.

With rates and home prices rising so quickly, you might find that you can’t afford the same home that you could a month ago. Well, what if you only had to pay interest each month? Here’s the payment comparison on a few scenarios.

Home Price$400k$600k$800k
20% down payment$80,000$120,000$160,000
Loan Amount$320,000$480,000$640,000
Interest Rate*6.5%6.5%6.5%
30-year fixed payment**$2,023$3,034$4,045
Interest-only payment**$1,733$2,600$3,466

*Interest rates shown are for example purposes only and may not be currently available. Your rate will be different. Get a personalized mortgage quote here. **Does not include taxes, insurance, HOA, or other dues or fees.

The monthly savings are significant. The interest-only payment would be approximately $600 per month less than the payment for a 30-year fixed $640,000 loan with 20% down.

How to calculate your 7-year interest-only payment

You don’t need an interest-only mortgage calculator to figure out your payment. Here’s the formula.

Loan amount X interest rate / 12

So a $500,000 loan amount at 6.5% would look like this:

$500,000 X 0.065 = $32,500 (yearly interest) / 12 = $2,708 per month.

With a few keystrokes, you can calculate about how much your interest-only loan payment would be.

Who are 7-year interest-only loans good for?

These loans have many purposes. They are not just to reduce your payment to afford more home, although that’s a good use case. Here are individuals who might benefit:

2021 and early 2022 home shoppers: Mortgage rates and home prices have shot up like few times in history. An interest-only loan could help you afford the home you really want.

Buyers with variable income: With a 7-year interest-only loan, you have the option to pay down principal when you’re able to. But during months of lower income, you can choose the interest-only option.

Buyers who expect a large sum of money soon: Unlike a 30-year fixed loan, making a large payment toward principal will reduce the amount you owe each month. You only pay interest in the outstanding balance. If you expect a large bonus or inheritance in the future, you could reduce your mortgage payment without refinancing.

Those who might sell or refinance soon: According to the National Association of Realtors 2021 Profile of Home Buyers and Sellers, the average person stayed in their home just eight years. Most people sell or refinance before or shortly after the fixed period of this loan.

7-year interest-only mortgage pros and cons


  • Lower initial payment during the interest-only period, helping you afford more home
  • Option to pay down principal
  • Mortgage payments drop as you pay down principal
  • The rate is fixed for seven years, then there are limits on how much it can adjust


  • You might end paying down little or no principal 
  • The rate can adjust upward at the end of the fixed period
  • Eventually, you’ll have to pay principal and interest, which will cause your payments to increase significantly
  • Might only be available to higher credit and higher net worth individuals, depending on the lender

7-year IO ARM alternatives

Standard adjustable-rate mortgages

Interest-only adjustable-rate mortgages

7-year interest-only loans aren't the dangerous loans of the past

Many homebuyers might fear an interest-only loan because it harkens to the mid-2000s when people lost their homes by getting into complex loan types.

Back then, many people received very short-term loans, such as 2-year ARMs or even 1-month ARMs, in which mortgage payments shot up quickly after closing.

A 7-year ARM offers a significant amount of time to increase your income, pay down the loan, sell, or refinance.

But some may have another objection: paying only interest. But with a 30-year fixed mortgage at 6.5%, only 15% of your payment goes toward principal the first year anyway. It takes five years to pay off $32,000 of loan balance on a $500,000 loan, even with a fully-amortized loan. This isn’t a whole lot different than having an interest-only loan.

Paying down zero principal for the first five to seven years is often worth it to secure a home that suits your needs.

Find the best interest-only lenders here.

7-year interest-only FAQ

How can an intertest-only loan be used?

You can use an interest-only loan to purchase or refinance a home. Check with your lender about cash-out refinances.

What happens after the interest-only period?
How long is the interest-only period?
What happens after the 7-year fixed period?

These loans aren’t the right choice for everyone, but they can make the difference between affording a home or not.

Examine your goals and situation, and consider buying a home with this program.

Start your 7-year interest-only loan now.

Our advise is based on experience in the mortgage industry and we are dedicated to helping you achieve your goal of owning a home. We may receive compensation from partner banks when you view mortgage rates listed on our website.