Purchase · 5 min read
Should I take an adjustable-rate mortgage because the fixed rate jumped?
October 2, 2026 · Written by Bill Egan, NMLS 7342
Short answer
Not just because this week’s fixed rate is higher. An adjustable-rate mortgage, or ARM, starts with a lower rate for a set number of years, then the rate can change. Freddie Mac’s weekly survey put the 30-year fixed at 7.28% as of October 1. A lower starting payment only helps if you can live with a higher one later. If you will still be in the house when the rate can change, price that payment before you say yes.
01
Why this comes up
The fixed rate moved up this week, and someone showed you a loan with a lower payment for the first few years. You want the house, and the fixed payment feels tight. You are asking if the lower starting rate is a real way in, or a surprise you will meet later.
02
Where this goes wrong
The trouble shows up after the fixed period ends. The rate can go up, and the payment can go up with it. If you bought at the top of what you can pay, a higher payment is not a small change. It also shows up if you planned to sell or refinance before the change and the house does not sell, or the new rate is not better.
03
What we do about it
We put both payments on one page: the starting payment, and a payment if the rate moves up after the first period. We also look at how long you expect to keep the house. If the higher payment does not fit, we stay with a fixed rate, even if the starting number is higher. The choice is about the payment you can keep, not the lowest number on the first page.
04
How to get ready
Ask three things before you choose. How many years is the starting rate locked? What is the highest the rate can go? What would the payment be at that higher rate, with taxes and insurance? If you cannot say yes to that payment, do not take the adjustable loan to win the house.