When mortgage rates rise, buying a home can feel harder to plan. Even a small rate change can increase your monthly payment.
That is why some buyers are exploring different mortgage options. One option getting attention is the adjustable-rate mortgage, also called an ARM.
An ARM can offer a lower starting interest rate than some fixed-rate loans. However, the rate can change later, which may increase your monthly payment.
For buyers who need more flexibility, understanding how ARMs work is important. The right choice depends on your budget, plans, and comfort with future payment changes.
What Is an Adjustable-Rate Mortgage?
A fixed-rate mortgage keeps the same interest rate for the life of the loan. Your principal and interest payment generally stays the same.
An adjustable-rate mortgage works differently. It usually starts with a fixed interest rate for a set period. After that period, the rate can change based on the loan’s terms and a market index.
Some buyers choose ARMs because their initial rates may be lower than fixed-rate options. This can reduce the starting monthly payment.
However, a lower starting payment does not guarantee lower costs over the life of the loan. Buyers should compare the initial rate, adjustment rules, fees, and possible future payments.
For a deeper explanation of the advantages and risks, read our guide to adjustable-rate mortgage pros and cons.
Why Are More Buyers Considering ARMs?
Affordability remains an important concern for many homebuyers. When borrowing costs are high, buyers often look for ways to make monthly payments more manageable.
An ARM may offer a lower initial interest rate than a comparable fixed-rate mortgage. Depending on the loan terms, this difference can make a noticeable change in the starting payment.
Bankrate reported that, in September 2026, rates for some ARM products were more than one percentage point below rates for fixed-rate loans. The exact difference depends on the products and borrower qualifications being compared.
That potential savings can attract buyers who are struggling to fit a home purchase into their budgets.
But the initial payment is only part of the decision. Buyers must also understand what could happen when the introductory period ends.
What the latest mortgage data shows
The Mortgage Bankers Association reported that roughly one in ten mortgage applicants chose an ARM in October 2026.
This figure suggests that ARMs are an option some buyers are considering in today’s market. It does not mean they are the best choice for every buyer.
Borrowers should compare available loan offers using the same purchase price, down payment, loan amount, and estimated ownership period.
How a 5/1 Adjustable-Rate Mortgage Works
A 5/1 ARM is one example of an adjustable-rate mortgage.
The number 5 means the initial interest rate stays fixed for the first five years. The number 1 means the rate can adjust once each year afterward, subject to the loan terms.
For example, a buyer may receive a lower starting rate for the first five years. When the adjustment period begins, the rate may rise or fall according to the loan’s index, margin, and adjustment limits.
If the rate rises, the monthly payment may increase. If the rate falls, the payment may decrease, depending on the loan terms.
Many ARMs include rate caps. These limits control how much the interest rate can change at the first adjustment, at later adjustments, and over the life of the loan.
Never assume your future payment will remain affordable just because the initial payment fits your budget.
Ask your lender to explain the specific adjustment schedule and calculate the maximum possible payment under your loan terms.
The Benefits and Risks of Choosing an ARM
An adjustable-rate mortgage may suit some buyers, but it comes with trade-offs.
Potential benefits
- Lower initial rate: Some ARMs begin with a lower interest rate than comparable fixed-rate loans.
- Lower starting payment: A lower initial rate may reduce the principal and interest payment during the introductory period.
- Shorter ownership plans: Buyers who expect to move before the first adjustment may consider an ARM, although future plans can change.
- More loan options: Comparing ARMs with fixed-rate mortgages can help buyers understand their available choices.
Potential risks
- Payment increases: Your monthly payment may rise when the interest rate adjusts.
- Uncertain future costs: Changes in rates can make long-term budgeting harder.
- Refinancing is not guaranteed: You may not qualify for a new loan when you want to refinance.
- Plans can change: You may stay in the home longer than expected and face adjustments you did not originally plan for.
Before choosing an ARM, ask your lender to compare the starting payment with possible future payments. Make sure you understand the costs and risks before signing the loan documents.
Questions to Ask Before Choosing an ARM
The introductory rate is important, but it should not be the only factor in your decision.
Ask your lender these questions before choosing a loan:
- How long will my initial interest rate remain fixed?
- Which index and margin determine future rate adjustments?
- How often can the rate change after the introductory period?
- What are the initial, annual, and lifetime rate caps?
- What could my monthly payment become if rates rise?
- Are there prepayment penalties or other fees?
- How much will I pay in closing costs?
- Could I comfortably afford the maximum payment allowed under the loan terms?
You should also compare the loan’s annual percentage rate, or APR. The APR includes certain loan costs and can help you compare offers, although it does not show every possible future cost.
If you are preparing to buy, our guide to getting the best mortgage rate explains why comparing lenders and loan terms matters.
What Happens When the ARM Rate Resets?
When the initial fixed-rate period ends, your loan enters its adjustment period. Your interest rate and payment may change according to the terms of your mortgage.
You may have several options, depending on your finances and circumstances:
- Keep the existing loan: Continue making payments if the adjusted payment fits your budget.
- Refinance into a fixed-rate mortgage: This may provide a stable interest rate if you qualify and the terms make sense.
- Consider another loan: A different mortgage may be available, but you must compare its costs and risks.
- Sell the home: Selling may be an option if your housing needs or financial situation change.
- Contact your loan servicer: If you experience financial difficulty, ask whether assistance options are available.
Refinancing is not automatic. You generally need to qualify for a new loan, and the costs must make financial sense.
Your income, credit, debts, home value, and market conditions can affect your options. Do not rely on refinancing as your only plan for handling a higher payment.
Are Today’s Adjustable-Rate Mortgages Different From Those Before 2008?
Adjustable-rate mortgages became associated with the housing crisis because some borrowers had risky loan terms and could not manage their payments when conditions changed.
Today’s mortgage rules include protections designed to assess a borrower’s ability to repay. However, this does not make every ARM safe or suitable for every household.
Loan terms, underwriting requirements, and consumer protections matter. So does the borrower’s ability to manage possible payment increases.
Buyers should review the actual loan documents and understand the lender’s calculations. Never assume an ARM is safe simply because it is being offered today.
Key Takeaways About Adjustable-Rate Mortgages
- Some buyers consider ARMs because their initial interest rates may be lower than fixed-rate alternatives.
- A lower starting payment does not guarantee lower costs over the life of the loan.
- After the introductory period, the interest rate and monthly payment may change.
- Rate caps limit adjustments, but they do not remove the risk of a higher payment.
- Refinancing later is not guaranteed and may involve additional costs.
- Compare the initial payment, potential future payments, fees, and loan terms before making a decision.
- Choose a mortgage based on your finances and risk tolerance, not just the lowest advertised rate.
Frequently Asked Questions About Adjustable-Rate Mortgages
Is an adjustable-rate mortgage cheaper than a fixed-rate mortgage?
An ARM may have a lower initial interest rate than a comparable fixed-rate mortgage. However, the total cost depends on future rate changes, fees, and how long you keep the loan.
Can an ARM payment increase after the initial period?
Yes. The interest rate can adjust according to the mortgage terms. If the rate rises, your monthly payment may increase.
What does a 5/1 ARM mean?
A 5/1 ARM typically has a fixed initial rate for five years. After that, the rate can adjust once each year, subject to the loan agreement.
Can I refinance before my ARM adjusts?
You may be able to refinance before the first adjustment. Approval depends on your financial situation, home value, credit, available loan products, and lender requirements. Refinancing also involves costs.
Should first-time homebuyers choose an ARM?
An ARM may suit some first-time buyers, but it is not right for everyone. Buyers should understand possible payment increases and confirm they can manage the risks before choosing this loan type.
What should I compare before selecting a mortgage?
Compare interest rates, APR, monthly payments, closing costs, adjustment rules, rate caps, and possible future payments. Review the complete loan terms with your lender before making a decision.
Choosing a Mortgage That Fits Your Future Plans
Adjustable-rate mortgages can offer an alternative for buyers who want to explore different ways to manage their initial housing costs. However, the lowest starting payment is not always the best long-term choice.
Before deciding, compare ARM and fixed-rate offers using the same loan amount and down payment. Ask your lender to show how payments could change over time.
The best mortgage is one you understand and can afford, both now and if your financial circumstances or interest rates change.