"I Can't Give Up My 3% Rate" — The Math Nobody Actually Runs

Part 2 of 5 in the Why Sellers Wait series. Pairs with the one-page flowchart of the same name.

Somewhere in Marin or Sonoma right now, a homeowner is living in the wrong house because of a percentage.

The stairs are getting harder. The yard is too much. The kids are two hours away. But the mortgage is locked at a rate that may never come back, and trading it for today's rate feels like setting money on fire. So the rate makes the decision — not the life.

I get it. It's real math. But here's the thing: almost nobody actually runs the math. They compare two interest rates and stop. The rate is one input. Let's run the rest.

Start with the real goal

Downsize? Relocate closer to family? Cash out? The goal changes the math completely — which is why it's the first box on the flowchart.

If your next home costs less (most downsizers)

This is the scenario where the rate objection collapses most often. Say you're sitting on substantial equity — very common for long-tenure owners here. Deploy that equity as a large down payment on a smaller home, and you're financing a much smaller loan

A smaller loan at a higher rate can cost less per month than a bigger loan at a lower rate. Add lower property insurance, lower utilities, less maintenance on the smaller place, and the total monthly picture often favors the move — even before you count the quality-of-life side.

Your equity is doing nothing sitting at 3%. Deployed correctly, it works.

If your next home costs the same or more

Different play. Now we hunt for rate advantages on the purchase side: assumable loans (some government-backed mortgages can be assumed at the seller's original rate), seller-paid rate buydowns we negotiate into the deal, or adjustable products if your horizon is short. And remember the asymmetry: rates are refinanceable. The wrong house isn't. The stairs, the commute, the distance from your grandkids — no refi fixes those.

The side-by-side

Everything lands in one comparison: total monthly cost of staying versus total monthly cost of the move — in dollars and in quality of life. I build this for my clients in black and white.
And here's my promise, the same one that's printed on the flowchart: if the math says stay, I'll tell you to stay.

You'll know exactly what would have to change to flip the answer. Either way, the decision gets made on real numbers — not on fear of a percentage.

Get the one-page flowchart that walks this same decision path: text GUIDE to 415-246-4346 or visit nmcrealestate.com.

Next in the series: "The House Isn't Ready to Sell" — and why that's my favorite problem to solve personally.

Nick McNaboe | REALTOR® | DRE #02106027 | COMPASS | 415-246-4346 | [email protected] | nmcrealestate.com. Compass is a real estate broker licensed by the State of California and abides by Equal Housing Opportunity laws. License Number 01527235. Informational purposes only; not financial advice — loan qualification and terms vary; consult your lender.