When buying a home, the mortgage you select plays a significant role in your monthly payments and total borrowing costs. Understanding the differences between loan types is essential, yet mortgage terminology can make the decision process feel overwhelming.
Two common mortgage types are fixed-rate mortgages and adjustable-rate mortgages (ARMs). They differ in how your interest rate and monthly payments are determined. Understanding how each option works can help you choose the best loan for your needs.
What Is a Fixed-Rate Mortgage?
A fixed-rate mortgage is a type of home loan in which your interest rate remains the same. The rate is locked in when the loan is created and won’t change. These loans usually have terms of 15 or 30 years.
Since the interest rate doesn’t change, your payments also remain the same. For example, if your payment is $1,200 at the beginning of the loan, it will remain $1,200 through your final payment.
Pros of a fixed-rate mortgage
Many homebuyers prefer fixed-rate mortgages because of their predictability. They allow you to lock in an interest rate, and you don’t have to worry about future rate increases. Knowing your monthly payments remain the same each month also simplifies budgeting and long-term planning.
Cons of a fixed-rate mortgage
A fixed-rate mortgage may have a higher interest rate than an ARM for the first few years. After an ARM’s introductory APR ends and the rate adjusts, either loan could have the lower interest rate, depending on market conditions at the time.
Because a fixed-rate mortgage locks in your interest rate, you have less flexibility if rates drop later. To take advantage of lower rates, you would need to refinance, which involves applying for a new loan and paying closing costs again.
Who should consider a fixed-rate mortgage?
A fixed-rate mortgage may be a strong option for buyers who expect to remain in their home for many years. It appeals to those who value stability and want protection from potential rate increases. Because the payment remains the same, you can plan ahead with more confidence.
This type of home loan is also a good option for first-time homebuyers who want simplicity. A fixed-rate mortgage makes it easy to compare your loan options and estimate your payments before you start searching for the perfect home.
What Is an Adjustable-Rate Mortgage (ARM)?
An adjustable-rate mortgage (ARM) is a type of home loan that offers a lower fixed interest rate for an introductory period, often lasting between 3 and 10 years. After this period ends, the interest rate adjusts periodically based on market conditions. This differs from a fixed-rate mortgage, where the interest rate remains the same throughout the life of the loan.
How often the rate changes depends on the lender and the specific loan terms. Some ARMs adjust every six months, while others adjust once per year. For example, a 5/1 ARM means the interest rate is fixed for the first five years, then adjusts annually after that. Like fixed-rate mortgages, ARMs are commonly available with 15- or 30-year terms.
Pros of an ARM
The primary advantage of an ARM is that it typically offers a lower initial interest rate than a fixed-rate mortgage. This can reduce interest costs during the early years of the loan, which may be especially attractive to buyers who don’t plan to stay in their homes for very long.
Cons of an ARM
Homebuyers who choose an ARM may face higher payments once the initial fixed-rate period ends, making these loans less predictable for those who plan to stay in their homes long-term. If interest rates rise significantly, your monthly payments and the total interest you pay could increase substantially.
Who should consider an ARM?
An ARM may be a good choice for buyers who plan to move or refinance within a few years. The low fixed introductory interest rate may help you save on interest. It may also be a good fit if you expect your income to grow over time. You can purchase a home with lower upfront payments and adjust your housing costs as your earnings increase, provided you are comfortable with some interest rate risk.
Fixed-Rate Mortgage vs. ARM: Side-by-Side Comparison
Understanding how these mortgages compare can make it easier to choose the right loan. The following chart outlines the main differences:
| Fixed-Rate Mortgage | Adjustable-Rate Mortgage (ARM) | |
| Interest rate structure | Interest rate stays the same for the life of the loan | Interest rate is fixed for an initial period, then adjusts periodically |
| Monthly payment stability | Monthly payments remain consistent and predictable | Payments may increase or decrease after the adjustment period |
| Initial interest rate | Typically higher at the start | Often lower during the introductory period |
| Long-term cost predictability | High—borrowers know exactly what they’ll pay over time | Lower—future costs depend on market rate changes |
| Best for short-term vs. long-term buyers | Best for long-term homeowners planning to stay put | Better for short-term buyers or those planning to refinance |
| Risk level | Lower risk due to stable payments | Higher risk due to potential rate and payment increases |
How to Choose the Right Mortgage for You
When deciding between a fixed-rate mortgage and an ARM, don’t just focus on which option offers the lowest interest rate. Instead, consider the advantages and trade-offs of each loan type to determine which one best fits your overall needs.
One of the most important factors is how long you plan to stay in your home. If you expect to move within a few years, an ARM may offer a lower introductory interest rate. However, if you plan to stay long-term, a fixed-rate mortgage can provide stability by locking in your interest rate and providing consistent payments.
It’s also helpful to consider market conditions and interest rate trends. If rates are rising, locking in a fixed rate may provide long-term protection from future increases. If rates are expected to decline, an ARM could offer short-term savings, with the possibility that future adjustments may remain competitive.
Finally, think about your financial stability and risk tolerance. If you expect your income to grow in the coming years, an ARM’s lower initial rate may give you lower payments for the first few years. However, rates can rise over time, which could lead to higher borrowing costs later.
Why Work With GLCU for Your Mortgage Needs
Choosing the right mortgage is an important decision, but you don’t have to navigate it alone. Through our partnership with Mortgage Forward, Great Lakes Credit Union provides access to a range of home loan options, including fixed-rate mortgages, adjustable-rate mortgages, and refinancing solutions.
Mortgage Forward offers competitive rates, flexible terms, and in-house loan servicing, giving borrowers consistency from application through closing. Their loan officers provide clear guidance at every stage, helping you understand your options and move forward with confidence. Through the “Pay It Forward” initiative, $100 from every closed loan is donated to a charity of your choice — supporting the communities we serve.
Whether you’re purchasing your first home or comparing loan structures, our team is here to help you review your options and take the next step.
The information in this post is for educational and informational purposes only and does not constitute investment or financial advice. You should consult a licensed financial advisor before investing in any financial product or service.
