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The Global Insight

What is a payment option adjustable-rate mortgage?

Author

Michael Gray

Updated on February 08, 2026

A payment-option ARM is a monthly adjusting adjustable-rate mortgage (ARM), which allows the borrower to choose between several monthly payment options, including the following: A 30 or 40-year fully amortizing payment. A minimum payment or a payment of any amount greater than the minimum.

How much can an adjustable-rate mortgage increase?

This cap says how much the interest rate can increase in total, over the life of the loan. This cap is most commonly five percent, meaning that the rate can never be five percentage points higher than the initial rate. However, some lenders may have a higher cap.

How is the adjustable-rate mortgage calculated?

To calculate your new interest rate when it’s time for it to adjust, lenders use two numbers: the index and the margin. The margin is the number of percentage points added to the index by the mortgage lender to set your interest rate on an adjustable-rate mortgage (ARM) after the initial rate period ends.

Why is an adjustable mortgage rate bad?

While it may seem beneficial at first glance, an ARM payment cap could actually prevent your mortgage payment from fully covering future interest increases. This results in negative amortization, which means your loan balance would go up instead of down with each payment.

Do you pay principal on an ARM?

Interest only ARMs. With this option, you pay only the interest for a specified time, after which you start paying both principal and interest. The interest rate will adjust during both the interest only period and interest + principal period.

What is a 5’1 hybrid ARM?

A 5/1 hybrid adjustable-rate mortgage (5/1 ARM) begins with an initial five-year fixed-interest rate period, followed by a rate that adjusts on an annual basis. The “5” in the term refers to the number of years with a fixed rate, and the “1” refers to how often the rate adjusts after that (once per year).

Can I pay off an ARM early?

You can pay off an ARM early, but not without some careful planning. The difficulty is that every time the interest rate changes on an ARM, the mortgage payment is recalculated so that the loan will pay off in the period remaining of the original term.

What is a 5’6 month ARM?

A 5/6 hybrid adjustable-rate mortgage (5/6 hybrid ARM) is an adjustable-rate mortgage (ARM) with an initial five-year fixed interest rate, after which the interest rate begins to adjust every six months according to an index plus a margin, known as the fully indexed interest rate.

What are the disadvantages of an adjustable-rate mortgage?

Cons of an adjustable-rate mortgage

  • Rates and payments can rise significantly over the life of the loan, which can be a shock to your budget.
  • Some annual caps don’t apply to the initial loan adjustment, making it difficult to swallow that first reset.
  • ARMs are more complex than their fixed-rate counterparts.

What do you need to know about adjustable rate mortgages?

(Ask lenders to help you fi ll out the worksheet so you can get the information you need to compare mortgages.) An adjustable-rate mortgage (ARM) is a loan with an interest rate that changes. ARMs may start with lower monthly payments than fi xed-rate mortgages, but keep in mind the following: Your monthly payments could change.

How is the monthly payment on a mortgage calculated?

The monthly payment is calculated to payoff the entire mortgage balance at the end of the term. The term is typically 30 years. After any fixed interest rate period has passed, the interest rate and payment adjusts at the frequency specified.

How does interest rate affect monthly mortgage payment?

Mortgage rates play an outsized role in determining what your monthly mortgage payment will be. They can be fixed or adjustable and the rates themselves will vary based on how the duration of the loan is structured. For example, 15-year loans come with lower interest rates than 30-year loans.

Which is better an arm or fixed rate mortgage?

Typically an ARM will have a lower interest rate than a fixed rate mortgage. The rate of an Interest Only ARM will vary by lender. This is the number of months the rate is fixed for an ARM. During this period the interest rate and the monthly payment will remain fixed. The rate will then adjust annually by the expected rate change.