I’m Michael DiVita — DRE #01372066 | NMLS #241655, DiVita Home Finance (DRE #01818285 | NMLS #323700), Tiburon, CA. I’ve been in California mortgage lending since 2000 and founded DiVita Home Finance in 2007. Call (800) 239-1103.
With mortgage rates still elevated in 2026, more California buyers are asking: should I take an adjustable-rate mortgage (ARM) to get a lower payment? The ARM vs. fixed rate question is one of the most common I field — and the right answer depends heavily on how long you plan to stay.
What’s the Difference?
A fixed-rate mortgage locks your interest rate for the entire loan term — 15 or 30 years. Your principal and interest payment never changes, regardless of what happens to market rates.
An adjustable-rate mortgage (ARM) starts with a fixed rate for an initial period (typically 5, 7, or 10 years), then adjusts annually based on a market index. You get a lower rate upfront, but the rate can rise — or fall — after the fixed period ends.
How ARMs Are Priced
ARM rates typically run below 30-year fixed rates during a normal rate environment — the exact spread varies by market conditions at the time you lock. On a large California loan, even a modest rate difference translates to meaningful monthly savings during the fixed period. The tradeoff is rate uncertainty after that window closes.
How ARMs Work After the Fixed Period
After the fixed period, your rate adjusts annually based on an index (typically SOFR) plus a margin (typically 2.75%). Most ARMs have caps that limit how much the rate can change: an initial cap limits how much the rate can jump at first adjustment (typically 2–5%); a periodic cap limits the max increase per year after that (typically 2%); and a lifetime cap limits the max increase over the life of the loan (typically 5–6%). Understanding your worst-case scenario before choosing an ARM is essential.
When an ARM Makes Sense
An ARM is a smart choice when you’re certain you’ll sell or refinance before the fixed period ends — if you’re buying a “starter home” with a clear 5-year horizon, a 5/1 ARM locks in savings the entire time you own it. It also makes sense if you expect rates to fall significantly and plan to refinance into a fixed rate before the ARM adjusts. It can help you qualify for a higher loan amount when needed, since the lower initial payment means a lower debt-to-income ratio. And for second homes or investment properties with a defined hold period, an ARM often pencils out well.
When a Fixed Rate Is Better
A fixed rate is the right choice when you plan to stay in the home long-term (10+ years), when you value payment certainty and budget predictability above all, when you’re at or near the top of your qualifying budget and can’t absorb a payment increase, or when rate uncertainty would cause ongoing stress. The peace of mind that comes with a payment that never changes has real value for many buyers.
The Refinance Strategy
Some buyers take an ARM specifically planning to refinance when rates drop. This can work — but only if rates actually fall and you qualify for the refinance at that time. It’s a calculated bet, not a guaranteed strategy. Before committing to an ARM with a refinance plan, make sure you’re comfortable holding it if rates don’t move the way you expect.
Which Is Right for You?
The best loan is the one that fits your timeline, risk tolerance, and monthly budget. I’ll model both scenarios side by side with your actual numbers — loan amount, expected hold period, rate environment at the time you lock — so you can make an informed decision rather than guessing.
Frequently Asked Questions
Is an ARM a good idea in California in 2026?
It depends on your situation. An ARM can make strong financial sense for buyers with a clear, shorter-term hold period — typically 5 to 7 years — who want to take advantage of the lower initial rate and don’t plan to stay through the adjustment period. For buyers planning to stay long-term, a fixed rate provides payment certainty that most find worth the premium. The key question is: how long do you plan to own this property, and can you absorb a higher payment if rates rise after the ARM adjusts?
What is a 7/1 ARM mortgage?
A 7/1 ARM is an adjustable-rate mortgage with a fixed interest rate for the first 7 years. After year 7, the rate adjusts annually based on a market index (typically SOFR) plus a lender margin. The rate changes are subject to caps: an initial cap limits how much it can jump at first adjustment, a periodic cap limits annual increases after that, and a lifetime cap limits the total increase over the loan’s life. A 7/1 ARM is a common choice for buyers who expect to sell or refinance within 7 years.
What happens to an ARM if interest rates go up?
When an ARM adjusts, the new rate is calculated as the current index value plus your loan’s margin. If rates have risen since you took the loan, your rate — and monthly payment — will increase, subject to the caps in your loan agreement. Most ARMs have a periodic cap of 2% per year and a lifetime cap of 5–6% above the initial rate. Before choosing an ARM, you should calculate the worst-case payment under the lifetime cap to make sure you could still afford the loan if rates move against you.
Talk to Michael Directly
DiVita Home Finance | Tiburon, CA | In lending since 2000, founded DiVita Home Finance in 2007. Michael DiVita DRE #01372066 | NMLS #241655. Company DRE #01818285 | NMLS #323700.
💬 Text: (310) 849-9124
