What Are Fixed-Rate Mortgages?
A fixed-rate mortgage keeps the same interest rate for the entire loan term, which means your principal and interest payment stays the same. This predictability helps with budgeting over the life of the loan.
Fixed-rate loans are often chosen by borrowers who plan to stay in their home for many years and want protection from future interest rate increases.
However, because the rate is locked in, you won't automatically benefit if market rates drop. To take advantage of lower rates, you would need to refinance.
Sources: Canal Bank, Universal Class, GO Mortgage, Bankrate
What Are Adjustable-Rate Mortgages?
An adjustable-rate mortgage (ARM), also known as a variable-rate mortgage, has an interest rate that can change over time. Most ARMs start with an initial fixed-rate period—often 5, 7, or 10 years—after which the rate adjusts periodically.
The adjustment is based on a financial index plus a margin, and rate caps limit how much the rate can increase at each adjustment and over the life of the loan.
Because of the initial fixed period, ARMs typically start with a lower interest rate than fixed-rate mortgages, which can result in lower initial monthly payments.
Sources: Canal Bank, Universal Class, GO Mortgage, Bankrate
Key Differences at a Glance
The table below compares the main features of fixed-rate and adjustable-rate mortgages.
| Feature | Fixed-Rate Mortgage | Adjustable-Rate Mortgage (ARM) |
|---|---|---|
| Interest Rate | Stays the same for entire loan term | Fixed for initial period, then changes based on index + margin |
| Monthly Payment | Principal and interest payment stays the same | Can increase or decrease after initial period |
| Initial Interest Rate | Often higher than ARM introductory rate | Typically lower than fixed-rate |
| Market Change Impact | Payment doesn't change; must refinance to benefit from lower rates | Can adjust down or up at adjustment dates |
| Best For | Long-term ownership, predictable payments | Short-term homeownership, lower initial payments |
Sources: Canal Bank, Universal Class, GO Mortgage, Bankrate
Pros and Cons
Fixed-rate mortgages provide long-term rate protection and easier budgeting, but you might miss out on lower rates without refinancing.
Adjustable-rate mortgages can offer lower initial payments, which may be helpful if you plan to own the home for a short time. However, your rate—and payment—can adjust upward, creating uncertainty.
- Fixed-rate pros: predictable payments, protection from rate increases.
- Fixed-rate cons: may need to refinance to benefit from lower market rates.
- ARM pros: lower initial interest rate, potential for lower payments if rates fall.
- ARM cons: rate can increase after the initial period, leading to higher payments.
Sources: Canal Bank, Universal Class, GO Mortgage, Bankrate
National Rate Context
Looking at national data can help put rate type decisions in perspective. According to the Consumer Financial Protection Bureau, the median interest rate for home purchase loans secured by first-lien principal-residence site-built single-family properties was 4.990% in 2022, compared to 3.000% in 2021.
In 2022, the average monthly payment for a conventional conforming 30-year fixed-rate mortgage rose from $1,400 in December 2021 to $2,045 in December 2022, a 46.1% increase.
For a single-family house priced at $400,000 with a 10% down payment and 700 credit score, loan offers for a 30-year fixed mortgage could range from 5.875% to 8.125% as of April 1, 2025, according to the CFPB's Explore rates tool. Under the same assumptions, a 15-year fixed mortgage could range from 5.000% to 7.500%.
Sources: Consumer Financial Protection Bureau
Which Rate Type Is Right for You?
Deciding between a fixed-rate and an adjustable-rate mortgage depends on your financial situation and how long you plan to stay in the home.
If you value predictable payments and long-term stability, a fixed-rate mortgage may be a better fit. If you expect to move within a few years and want a lower initial rate, an ARM could be attractive.
Consider the initial rate difference and your risk tolerance for future rate changes. There is no one-size-fits-all answer: it's important to compare offers and think about your own cash flow and plans.
Sources: GO Mortgage, Bankrate
Decision Criteria Matrix
To help you weigh the options, here is a simple decision matrix based on the key attributes of each rate type.
| Criterion | Fixed-Rate Mortgage | Adjustable-Rate Mortgage |
|---|---|---|
| Rate Stability | High | Low to moderate (after initial period) |
| Initial Payment | Higher | Lower |
| Payment Change | None | Can increase or decrease |
| Best for Ownership Duration | Long-term | Short-term |
| Rate Protection | Yes | Limited (caps apply) |
Sources: Canal Bank, Universal Class, GO Mortgage, Bankrate
Understanding Rate Caps and Adjustments
Rate caps are a key feature of ARMs that limit how much your interest rate can increase. Caps apply both at each adjustment (periodic caps) and over the life of the loan (lifetime caps).
These caps provide some protection, but they don't eliminate the risk of higher payments. It's important to understand your specific ARM's caps and adjustment schedule before choosing this type of loan.
Sources: Universal Class
Frequently asked questions
Are ARMs riskier than fixed-rate mortgages?
ARMs carry the risk of higher payments after the initial fixed period, because the rate can adjust upward. Fixed-rate mortgages offer more predictability, which some borrowers consider less risky. However, ARMs often have lower initial rates, which can be beneficial if you plan to sell before adjustments occur. Rate caps provide some protection, but they do not guarantee that your payment will stay affordable.
Sources: Universal Class, GO MortgageCan I switch from an ARM to a fixed-rate mortgage later?
You may be able to refinance an ARM into a fixed-rate mortgage, but refinancing involves new loan terms and closing costs. Check with your lender about current options.
Sources: GO MortgageSources
- Data Point: 2022 Mortgage Market Activity and Trends — Consumer Financial Protection Bureau
- Explore interest rates — Consumer Financial Protection Bureau
- Adjustable-Rate vs. Fixed-Rate Mortgages — Canal Bank
- Types of Mortgage Loans: Fixed and Adjustable Rate Mortgages (ARMs) — Universal Class
- Adjustable-Rate vs. Fixed-Rate Mortgages in a Falling Rate Environment — GO Mortgage
- Compare current mortgage rates for today — Bankrate