Adjustable vs Fixed Rate Mortgage

Evaluating ARM adjustable Rate Mortgage Savings vs. Risks

When federal interest rates rise, home buyers often look at **Adjustable-Rate Mortgages (ARMs)** to lower their monthly mortgage payments. An ARM features an initial low interest rate for a fixed period (such as 5 or 7 years) before adjusting annually based on benchmark rate indexes.

While ARMs offer immediate monthly savings, they carry significant long-term risk. Buyers must calculate their worst-case maximum payments to avoid foreclosure risks.

Understanding the Interest Rate Adjustment Caps

To protect borrowers, ARMs are structured with interest rate caps. These caps are usually expressed as three numbers (e.g., 2/2/5):

1. Initial Adjustment Cap: The maximum percentage your interest rate can increase the first time it adjusts after your fixed period ends.
2. Subsequent Adjustment Cap: The maximum rate increase allowed in any single year after the first adjustment.
3. Lifetime Adjustment Cap: The absolute maximum rate increase allowed over the entire life of your mortgage (typically capped at **5% to 6%** above your initial start rate).

Strategic Evaluation: When is an ARM a Good Idea?

An ARM can be a smart strategy if your target home holding period is **shorter than the initial fixed period** (e.g., you plan to sell and relocate within 5 years of buying a 7/1 ARM). This allows you to pocket the initial rate savings while completely avoiding the adjustment phase.

However, if you plan to stay in the home long-term, ensure you have a clear refinance plan. Refinancing into a stable fixed-rate mortgage before your fixed term ends is critical to avoiding interest rate hikes.