Fixed Rate vs ARM
Stability vs lower initial rate — compare the two most common mortgage structures.
Overview
A fixed-rate mortgage keeps the same rate for the entire loan term. An adjustable-rate mortgage (ARM) offers a lower initial rate for a fixed period (5, 7, or 10 years) before adjusting. The choice depends on how long you plan to keep the home and your risk tolerance.
Side-by-Side Comparison
| Feature | Fixed-Rate | ARM |
|---|---|---|
| Rate Structure | Same rate for full term | Lower initial rate, adjusts after fixed period |
| Initial Rate | Higher than ARM | 0.25–1% lower than fixed |
| Payment Predictability | Completely predictable | Predictable during fixed period |
| Risk | No rate risk | Rate can increase after fixed period |
| Best Hold Period | 7+ years | < 7 years |
| Rate Caps | N/A | Per-adjustment and lifetime caps |
| Best For | Long-term stability | Short-term savings |
Choose Fixed-Rate If…
- You plan to stay in the home for 7+ years
- You value payment stability and predictability
- You're risk-averse with your finances
- Rates are historically low and worth locking
Choose ARM If…
- You plan to move or refinance within 5–7 years
- You want the lowest possible initial payment
- You're buying a jumbo property (ARM pricing is very competitive)
- You expect your income to increase over time
The Bottom Line
For most homeowners planning to stay put, a fixed rate provides peace of mind. For shorter-term stays, relocating professionals, and jumbo borrowers, an ARM can save significant money during the initial period with limited risk if you sell or refinance before adjustments begin.
Common Questions
Your rate adjusts based on a market index plus a margin. Rate caps limit increases per adjustment (typically 2%) and over the lifetime (typically 5-6%). Your payment could increase.