09/04/2026
Here's the difference between buying a home comfortably in California and buying a home that keeps you up at night.
Most buyers only learn one number from their lender: the maximum they qualify for. But qualifying for a payment and being able to live with that payment for 30 years are two very different things.
That's why I give my clients two numbers before they ever look at a single listing.
The comfortable number the 28% rule:
Take your gross monthly income and multiply by 0.28. That's what most financial guidelines consider a healthy housing payment one that leaves room for savings, emergencies, lifestyle, and life.
On a $180,000 combined household income:
$15,000/month Γ 0.28 = $4,200/month
That comfortably supports a home around $580,000β$620,000 in California at today's rates.
The maximum number the 45% DTI rule:
Take that same monthly income, multiply by 0.45, then subtract every monthly debt you carry car payments, student loans, credit card minimums. What's left is the ceiling your lender will approve.
$15,000 Γ 0.45 = $6,750
β $800 in monthly debts
= $5,950 maximum mortgage payment
That supports a home around $800,000β$850,000 in California.
The gap between those two numbers $4,200 and $5,950 is where most buyers get into trouble. Lenders will approve you up to the ceiling. Nobody tells you what living at the ceiling actually feels like month to month.
The smart move is knowing both numbers before you search. Then deciding which range you actually want to live in not just qualify for.
Start here. Then open Zillow.
π Save this it's the most important math to run before you start your home search.
π Share it with someone planning to buy in California this year.
β Robin | CA Realtor + Business Coach