I’m Michael DiVita — DRE #01372066 | NMLS #241655, DiVita Home Finance (DRE #01818285 | NMLS #323700), Tiburon, CA. Call (800) 239-1103.
Fixed vs. Adjustable Rate Mortgages: Which Is Right for You in California?
Fixed or adjustable rate? In California’s high-cost market, this decision affects thousands of dollars per year. Here’s the honest analysis.
Fixed-Rate Mortgages
A fixed-rate mortgage locks your interest rate for the entire loan term — 30 years, 20 years, 15 years, or 10 years. Your principal + interest payment never changes.
Best for: Buyers planning to stay 7+ years; buyers who value payment certainty; buyers in rising rate environments.
30-year fixed rates and 15-year fixed rates (which typically run 0.5–0.75% lower) are priced by the market daily. Contact me for current rates — published averages are almost always stale by the time you read them.
Adjustable-Rate Mortgages (ARMs)
ARMs have a fixed rate for an initial period, then adjust periodically based on an index (typically SOFR) plus a margin. A 7/1 ARM is fixed for 7 years, then adjusts annually. A 5/1 ARM is fixed for 5 years, then adjusts annually.
Best for: Buyers confident they’ll sell or refinance before the adjustment period; buyers financing short-term primary residences or rentals; buyers with jumbo loans where the rate spread is significant.
ARM rate caps: All conforming ARMs have caps — typically 2/2/5 (first adjustment max 2%, subsequent max 2%, lifetime max 5% above initial rate). On a 7/1 ARM starting at 6.0%, worst-case max rate is 11%. Factor this into your scenario planning.
The Rate Differential
ARM rates are typically 0.375–0.625% below 30-year fixed rates (this spread varies by market conditions and lender). On a $1M loan, that differential translates to $3,750–$6,250 in annual interest savings. Over a 7-year fixed period — if you sell or refinance before adjustment — that’s meaningful money. The ARM often wins on pure math for buyers with a defined ownership timeline.
California-Specific Scenarios
Marin County / Bay Area: High home prices mean jumbo ARMs are common. Many buyers use 5/1 or 7/1 ARMs planning to refinance when rates improve or when they move up.
Investment properties: ARMs are popular for DSCR and investment loans where cash flow is the priority and short-term rate optimization matters more than long-term certainty.
First-time buyers: Fixed rates provide the payment certainty that helps with long-term budgeting — especially important when you’re also managing property tax, insurance, and maintenance costs for the first time.
The Honest Recommendation
If you’re buying your forever home or plan to stay 10+ years: 30-year fixed. If you’re buying a home you’ll likely sell or upgrade within 5–7 years: analyze the ARM savings carefully — it can be substantial in California’s high-price markets. I’ll run the side-by-side for your specific numbers.
Frequently Asked Questions
What happens when an ARM adjusts in California?
When an ARM’s initial fixed period ends, the rate adjusts based on an index (typically SOFR) plus a margin set at origination. For example, if SOFR is 4.5% and your margin is 2.5%, your new rate would be 7.0% — subject to the per-adjustment cap. Most conforming ARMs use a 2/2/5 cap structure: the first adjustment can’t exceed 2% above the initial rate, each subsequent adjustment can’t exceed 2%, and the lifetime cap is 5% above the initial rate. If you’re approaching your ARM’s adjustment window, contact me to evaluate a refinance.
Is a 5/1 or 7/1 ARM risky for a California home purchase?
The risk depends on your ownership timeline. If you’re highly confident you’ll sell or refinance within the fixed period, the ARM captures a meaningful rate savings with limited exposure to the adjustment. The risk is that life plans change — if you’re still in the home when the ARM adjusts and rates are high, your payment could increase significantly. Run both scenarios (ARM savings vs. worst-case adjustment) and make sure you can afford the worst-case payment before choosing an ARM.
Can I refinance out of an ARM before it adjusts?
Yes — refinancing out of an ARM before the adjustment period is one of the most common reasons California borrowers refinance. Most ARMs have no prepayment penalty, so you can refinance at any point. The timing question is whether current rates make the refinance worth the closing costs. I can run the break-even analysis for your specific situation to determine whether refinancing now — even if rates haven’t dropped dramatically — makes financial sense versus waiting.
Talk to Michael Directly
DiVita Home Finance | Tiburon, CA | Licensed since 2007. Michael DiVita DRE #01372066 | NMLS #241655. Company DRE #01818285 | NMLS #323700.
💬 Text: (310) 849-9124
