How Much Home Can You Actually Afford?

What Lenders Look At

Lenders use two ratios. The front-end ratio compares your housing payment to your gross monthly income. The back-end ratio adds all your monthly debts: car loans, student loans, credit cards, child support. Most conventional loans cap the back-end at 43% to 50% depending on credit and down payment strength.

Your housing payment includes principal, interest, property tax, homeowners insurance, and mortgage insurance if you put down less than 20%. In California, add HOA fees if you're buying a condo or planned community. That total monthly nut is what the lender measures against your income.

A $120,000 household income gives you about $10,000 gross per month. At a 43% back-end ratio, you have $4,300 for all debts. If you're carrying $800 in car and student loans, that leaves $3,500 for housing. With today's average 30-year fixed rate at 6.5%, property taxes around 1.1%, and insurance climbing every year in California, you're looking at a purchase price around $550,000 to $600,000 depending on down payment and exact location.

What You Qualify For Versus What You Should Spend

Maximum approval is not the same as comfortable. Lenders price in risk, not whether you can still take a vacation or handle a surprise roof repair. I've seen buyers stretch to the top of their approval and then feel trapped when property taxes adjust or the HOA levies a special assessment.

A useful rule: keep your total housing payment under 30% of your gross income if you want breathing room. That same $10,000 monthly household becomes $3,000 for housing instead of $4,300. The difference is whether an unexpected $5,000 expense derails your budget or just stings a little.

This isn't about being conservative for its own sake. It's about keeping options. Job changes happen. Kids get expensive. California has high state income tax, high gas prices, and a cost of living that doesn't leave much margin if you max out your mortgage every month.

Down Payment Changes the Math

A bigger down payment shrinks your loan amount and can eliminate mortgage insurance. On a $600,000 purchase, putting down 5% instead of 3% saves you about $150 a month in mortgage insurance. Jump to 20% down and that $600 monthly MI cost disappears entirely, plus your interest rate may improve by an eighth to a quarter point.

But draining your savings to hit 20% can backfire if it leaves you with no cushion for closing costs, moving expenses, and the immediate repairs that come with any California house built before 2010. I usually walk buyers through a few scenarios: 5%, 10%, and 20% down, then compare monthly payment against cash reserves left over.

Down payment assistance programs exist in California, especially for first-time buyers and in certain counties. Some are grants, some are silent second loans. They add complexity and sometimes cost, but they get people into homes who otherwise wait years to save. Worth a conversation if you're stuck between renting forever and buying sooner with help.

Income Documentation Matters More Than You Think

W-2 employees have it easiest. Two years of tax returns, recent pay stubs, and we're done. Self-employed, 1099 contractors, and gig workers face more scrutiny. Lenders average your last two years of net income after business deductions. If you wrote off $40,000 in expenses to lower your tax bill, that $40,000 doesn't count as income for mortgage qualification.

Bonus and commission income gets averaged over two years as well, and lenders want to see it's stable or growing. A one-time stock payout or signing bonus usually doesn't count unless it's clearly recurring. Rental income from investment properties counts, but only 75% of it after we subtract the mortgage and projected vacancy.

This is why I tell people to get pre-approved before they find the house. You learn exactly what the lender sees in your income picture, and if there's a problem, we fix it before you're in a bidding war.

How to Think About Your Real Number

Start with what you're paying now in rent. Add $500 to $800 for the hidden costs of ownership: maintenance, higher utilities, landscaping, surprise repairs. If that total feels uncomfortable, you're probably looking at too much house. If it feels fine and leaves room in your budget, you're in the zone.

Run a few purchase prices through a mortgage calculator that includes property tax, insurance, HOA, and MI if you're under 20% down. California property tax is about 1.1% of purchase price annually, but check the specific city because some have Mello-Roos and other assessments that push the effective rate closer to 1.4%. Homeowners insurance varies wildly depending on fire risk, age of the house, and whether you're near the coast.

I'm a loan officer, not a financial planner, but I will tell you this: the clients who feel best about their purchase a year later are the ones who bought under their max approval, kept an emergency fund, and didn't treat the house like the finish line of their financial life. When you're ready to run real numbers on a California property, I answer my own phone. We'll figure it out together.