In most of the country, a one-percentage-point move in mortgage rates is an inconvenience. In the Bay Area, where loan balances routinely run past a million dollars, the same move can swing your monthly payment by well over a thousand dollars — and reshape what you can afford.
The mechanics
Your principal-and-interest payment is a function of loan amount, rate and term. Because the Bay Area's loan amounts are large, each rate change is multiplied by a bigger number. That is why local demand cools fast when rates rise and comes back quickly when they fall.
An illustration
| 30-year rate | Payment on a $1,000,000 loan (P&I) |
|---|---|
| 5.0% | ~$5,368 / month |
| 6.0% | ~$5,996 / month |
| 7.0% | ~$6,653 / month |
The jump from 5% to 7% is roughly $1,285 more per month on the same loan — about $15,000 a year, or the equivalent of financing $200,000+ less home at the lower rate. (Figures are illustrative; get current numbers from your lender.)
Ways to manage rate risk
- Buy down the rate: paying discount points lowers your rate for the life of the loan — worthwhile if you will keep the mortgage long enough to recoup the cost.
- Temporary buydowns: a seller-paid 2-1 buydown lowers your rate for the first one to two years; useful if you expect to refinance.
- Adjustable-rate mortgages (ARMs): a 7- or 10-year ARM can carry a lower initial rate; appropriate only if your time horizon or plans fit the fixed period.
- Larger down payment: reduces the loan amount the rate is applied to, and can improve pricing tiers.
"Marry the house, date the rate" — with caution
Refinancing when rates fall is a real strategy, but it is not guaranteed. Rates may not drop on your timeline, and refinancing has costs. Only buy a payment you can sustain at today's rate; treat a future refinance as upside, not the plan.
Don't try to time the rate. Decide what monthly payment fits your life, then buy the home that fits that payment.