How Much Income Do You Need to Buy a Home in San Diego?

This might be the single most common question I get — usually asked a little nervously, sometimes over coffee, sometimes in a late-night text: "Liz, how much do we actually need to make to buy a home in San Diego?"

I love this question, because the honest answer is a lot more hopeful than most people expect. There's no single magic number — it depends on the price of the home, the size of your down payment, your other monthly debts, and where interest rates sit when you buy. But I can absolutely walk you through how it works, so the number stops feeling like a mystery and starts feeling like a plan.

The Simple Rule Lenders Actually Use

When a lender looks at your income, they're really looking at one thing: your debt-to-income ratio, or DTI. It's the percentage of your gross monthly income that goes toward debt payments — including your future mortgage.

Most lenders like to see your total monthly housing payment land somewhere around 28% of your gross monthly income, and all of your debts combined (housing plus car loans, student loans, credit cards, etc.) stay under roughly 43–45%. Some loan programs stretch higher than that, which is exactly why talking to a good lender matters — the "rule" has more flexibility than the internet makes it sound.

A Real San Diego Example

Let's make this concrete. Say you're looking at a home priced in the mid-range for San Diego County. Your monthly payment isn't just the loan — it's four things stacked together:

• Principal & interest — the actual mortgage, driven by your loan amount and the current interest rate.
• Property taxes — in San Diego, roughly 1.1%–1.25% of the purchase price per year, split into your monthly payment. (I break this down fully in my San Diego property taxes guide.)
• Homeowners insurance — a few hundred dollars a month, depending on the home.
• HOA or Mello-Roos — common in newer master-planned communities like parts of Chula Vista and Carmel Valley; zero in many older neighborhoods.

Add those together and you get your real monthly housing cost. Work backward from there — divide by that ~28% guideline — and you land on the income a lender would typically want to see. When you actually run it, the required income is usually lower than the scary figure people imagine, especially once a healthy down payment shrinks the loan.

One honest note: interest rates and San Diego prices both move, so treat any specific figure you read online as an illustration, not a promise. The only number that's truly yours comes from a lender looking at your real situation.

Three Things That Lower the Income You Need

1. A bigger down payment

Every dollar you put down is a dollar you don't borrow — which shrinks your monthly payment and the income required to qualify. You don't need 20%, either. Plenty of my buyers put down far less, and there are assistance programs designed to help (more on that in my down payment assistance guide).

2. Paying down other debt first

Because lenders look at all your debt, knocking out a car loan or a credit card balance can boost your buying power more than a raise would. It's often the fastest lever you can pull.

3. Choosing the right price point and area

San Diego is not one market — it's dozens. Homes in Chula Vista, El Cajon, La Mesa, and East County communities like Santee often come in well below the county's coastal averages, and a well-located condo can open the door for less income than a single-family home. Widening where you're willing to look is one of the most powerful moves a buyer can make.

What I'd Actually Tell a Friend

Here's my real advice: don't try to reverse-engineer your qualifying income from a blog post — even a friendly one like this. Get pre-approved instead. It's free, it usually takes a day or two, and it replaces all the guessing with a real number: this is the price range you qualify for, and this is what the monthly payment looks like.

Most people walk away from that conversation pleasantly surprised — and even the ones who aren't quite ready leave with a clear, motivating game plan for the next 6–12 months. Either way, you win.

If you'd like, I'm happy to connect you with a trustworthy local lender and sit with you while you look at the numbers together. No pressure, no obligation — just a clearer picture of what's possible for you here in San Diego.