Fixed vs Variable Rate Mortgage: Which Should You Choose?
Choosing between a fixed-rate and variable-rate (adjustable-rate) mortgage is one of the biggest decisions when buying a home. Each has distinct advantages depending on your situation, risk tolerance, and how long you plan to stay.
What is a fixed-rate mortgage?
A fixed-rate mortgage locks in your interest rate for the entire loan term—typically 15 or 30 years. Your monthly payment stays the same, making budgeting predictable.
What is a variable-rate mortgage?
A variable-rate mortgage (ARM) starts with a lower introductory rate that adjusts periodically based on market conditions. Common structures include 5/1 ARM (fixed for 5 years, then adjusts annually).
Why the right choice matters
The difference can mean thousands of dollars over the life of a loan. A lower ARM rate saves money if you sell or refinance before it adjusts. A fixed rate protects against rate increases.
Comparison table
| Aspect | Fixed-Rate Mortgage Calculator | Mortgage Calculator (compare rates) |
|---|---|---|
| Interest rate | Locked for full term | Lower initial rate, adjusts later |
| Monthly payment | Never changes | Can increase or decrease |
| Risk | No rate risk | Rate may rise significantly |
| Best if you stay | Long-term (10+ years) | Short-term (3-7 years) |
| Initial rate | Higher than ARM | Lower than fixed |
When to use each calculator
Fixed-Rate Mortgage Calculator
Choose a fixed-rate mortgage if you plan to stay long-term, want predictable payments, or expect rates to rise. It's the safer choice for most homebuyers.
Use Fixed-Rate Mortgage CalculatorMortgage Calculator (compare rates)
Choose a variable-rate mortgage if you plan to sell or refinance within 5-7 years, if current rates are high and expected to fall, or if you want the lowest initial payment.
Use Mortgage Calculator (compare rates)Fixed-rate mortgages account for about 90% of US home loans. They're preferred for their predictability.
Yes, through refinancing. However, refinancing involves closing costs and a new application.
After the initial fixed period, the rate adjusts based on a market index plus a margin. Most ARMs have caps on how much the rate can change.