ARM vs. Fixed-Rate Mortgage: Which Is Right in 2026?

A fixed-rate mortgage keeps the same interest rate for the entire loan, so your principal and interest never change. An adjustable-rate mortgage (ARM) has a lower fixed rate for an initial period (like 5 or 7 years), then adjusts periodically based on market rates — so your payment can rise or fall after the intro period ends.

The first number is how many years the rate stays fixed; the second is how often it adjusts afterward. A 7/1 ARM is fixed for 7 years, then adjusts once a year. During the intro period you often get a rate below the 30-year fixed — on a $400,000 loan, an intro rate of 5.9% vs a 6.5% fixed saves about $156 a month.

It can be, if you'll move or refinance before the fixed period ends, or if you expect rates to fall. The intro-rate discount saves money early. The risk is that rates are higher when your ARM adjusts, raising your payment. ARMs have caps that limit how much the rate can jump, but the uncertainty is the trade-off.

Caps limit how much your ARM rate can change: an initial cap (first adjustment), a periodic cap (each later adjustment), and a lifetime cap (the most it can ever rise). For example, a 2/2/5 cap means the rate can rise up to 2% at the first adjustment, 2% at each later one, and 5% total over the life of the loan.

Choose fixed if you plan to stay in the home long-term and want a payment that never changes. It's the safer choice for most buyers, especially when you can't predict where rates will be years from now. The certainty is worth the slightly higher starting rate for many people.

Yes. Many ARM borrowers refinance into a fixed-rate loan before the adjustment period, especially if rates drop or they decide to stay longer than planned. Just remember refinancing has closing costs, and you're not guaranteed a better rate — so don't count on it as your only exit plan.