When is an adjustable rate mortgage better than a fixed-rate mortgage?
Answer: An adjustable rate mortgage may be better when you want a lower initial rate, plan to sell or refinance before the adjustable period begins, or expect your income or financial situation to change in the next few years. It is not the right fit for every buyer, but it can be useful when the timeline, risk level, and loan terms make sense.
An Adjustable Rate Mortgage (ARM) is a home loan with an interest rate that stays fixed for an initial period, then can adjust at set intervals based on the loan terms and market conditions. For some buyers, an ARM can offer a lower starting rate than a fixed-rate mortgage, which may help reduce the monthly payment during the first few years of homeownership.
When considering an adjustable rate mortgage, the key question is whether that short-term savings fits your long-term plans.
How an Adjustable Rate Mortgage Works
An adjustable rate mortgage has a different structure than a traditional fixed-rate loan. Instead of keeping the same interest rate for the full loan term, an ARM starts with a fixed rate for a set period of time and then may adjust based on the terms of the mortgage.
The Initial Fixed-Rate Period
An adjustable rate mortgage usually begins with an initial fixed-rate period. During this time, your interest rate stays the same, which means your principal and interest payment remains consistent.
For example, a 5/6 ARM typically has a fixed rate for the first five years. A 7/6 ARM has a fixed rate for the first seven years. This initial period is one reason some buyers compare adjustable rate mortgages against fixed-rate mortgage options, especially if they do not expect to stay in the home long term.
The Adjustment Period
Once the fixed-rate period ends, the mortgage enters the adjustment period. At that point, the interest rate may move up or down at scheduled intervals.
In a 5/6 ARM, the rate can adjust every six months after the first five years. In a 7/6 ARM, adjustments begin after the first seven years. The timing of those adjustments depends on the specific loan program, so it is important to understand the schedule before choosing an adjustable rate mortgage.
Index, Margin, and Rate Caps
The adjusted rate is usually based on an index plus a margin. The index can change with broader market conditions, while the margin is set in your loan agreement.
ARMs also include rate caps that limit how much the interest rate can change. These caps may apply to the first adjustment, later adjustments, and the total rate increase allowed over the life of the loan.
Importance of Future Payments
A lower starting rate can be helpful, but it should not be the only factor in the decision. The most important question is whether the possible future payment still fits your budget. Before choosing an adjustable rate mortgage, review the starting payment, the adjustment schedule, the rate caps, and the highest payment you could be responsible for under the loan terms.
When is an Adjustable Mortgage Rate Better?
An adjustable rate mortgage may be worth considering when your homeownership timeline is clear. Many buyers compare ARMs with fixed-rate mortgages because they do not plan to stay in the same home for 15 or 30 years, or they want a lower initial monthly payment.
You Plan to Move Before the Rate Adjusts
An ARM may make sense if you expect to sell the home before the fixed-rate period ends. For example, with a 5/6 ARM, a buyer who plans to move within five years may benefit from the lower starting rate without reaching the adjustment period.
You Expect to Refinance Later
Some buyers choose an ARM because they plan to refinance before the first rate adjustment. This can be useful if they expect their income, credit, or loan options to improve. Refinancing is not guaranteed, so future rates, home value, credit, income, and loan approval should all be considered.
You Want a Lower Initial Monthly Payment
An ARM may offer a lower starting rate than a fixed-rate mortgage, which can reduce the monthly payment during the first part of the loan. The key is whether the payment still works if the rate adjusts later. An ARM may be a better fit for buyers who understand the future payment range and have room in their budget.
You Are Comfortable With Some Payment Uncertainty
An ARM is not automatically better than a fixed-rate mortgage. It depends on your plans, budget, and comfort level with possible payment changes. For some buyers, the lower initial payment and shorter timeline make sense. For others, the predictability of a fixed-rate mortgage may be the better choice for their comfort level.
When an Fixed-Rate Mortgage May Be Better than ARM
A fixed-rate mortgage, like a 30-year fixed loan or a 15-year fixed mortgage, keeps the same interest rate for the life of the loan. Fixed rate mortgages may be the better fit if long-term payment stability is your main priority.
A fixed-rate mortgage may make more sense if:
- You plan to stay in the home long term
- You prefer a predictable monthly mortgage payment
- You have a tighter budget and want fewer payment surprises
- You do not want to track future rate adjustments
- You are not comfortable relying on a future refinance
Adjustable Rate Mortgage FAQs
What is the biggest risk of an ARM?
The biggest risk is that the interest rate and monthly payment can increase after the fixed-rate period ends. Rate caps provide limits, but they do not remove the possibility of a higher payment.
Can I refinance out of an adjustable rate mortgage?
Yes, many homeowners refinance from an ARM into a fixed-rate mortgage before the adjustment period begins. Refinancing depends on market conditions, credit, home value, income, and loan approval at that time.
Are ARMs only for short-term homeowners?
Not always, but they are often most useful for buyers with a shorter expected timeline. A buyer planning to stay in the home long term should carefully compare the ARM’s future payment range against a fixed-rate mortgage.
Should first-time homebuyers consider an ARM?
Some first-time homebuyers may consider an adjustable rate mortgage if they understand the terms and have a realistic plan. However, first-time buyers who want predictable payments may feel more comfortable with a fixed-rate loan.
What types of loans are available for adjustable rate mortgages?
Conventional loans, FHA loans, and VA loans may be available as adjustable rate mortgages, depending on the loan program, lender, and borrower qualifications. USDA loans are commonly structured as 30-year fixed-rate loans.
Get Help Comparing Mortgage Options in Raleigh
If you’ve been wondering when an adjustable mortgage rate is better compared to a fixed-rate mortgage, it depends on your timeline, budget, and comfort with future payment changes. Raleigh Mortgage Group can help you compare loan options, review how an ARM may adjust over time, and look at whether a fixed-rate mortgage may offer more stability for your plans.
Contact us today to talk through your mortgage options and find a loan structure that fits your homebuying goals. Call [phone] or fill out our contact form to get started.