How Much House Can I Afford in 2025?

The question "how much house can I afford?" sounds simple, but the answer depends on four variables that interact in ways most buyers don't expect: your gross income, your existing monthly debt, your down payment, and the interest rate environment at the time you buy.

The most common mistake buyers make is starting with a target home price and working backward. The better approach is to start with your monthly payment capacity and work forward.

Start With Your Monthly Payment Capacity

Lenders use a metric called DTI (debt-to-income ratio) to measure how much of your gross monthly income goes toward debt. Most conventional loan programs allow a back-end DTI up to 45–50%, meaning your total monthly debt obligations — including your new housing payment — should not exceed 45–50% of your gross monthly income.

For a borrower earning $8,000/month gross with $700/month in existing debt (car payment, student loans, credit cards), the math looks like this:

What Does $2,900/Month Buy?

Your monthly housing payment (PITI) includes principal, interest, property taxes, homeowners insurance, and PMI if applicable. At today's rates, a $2,900/month payment with 10% down and a 6.5% rate translates to a purchase price of approximately $420,000–$440,000, depending on your property tax rate and insurance costs.

Use our Mortgage Calculator to run your specific numbers, or our Affordability Calculator to work backward from your income.

The Down Payment Variable

Your down payment affects three things: your loan amount, whether you pay PMI, and your interest rate tier. Putting 20% down eliminates PMI (which typically costs $100–$300/month on a $400,000 loan) and may qualify you for a slightly better rate. But waiting to save 20% while home prices and rates move can cost more than the PMI savings.

For most first-time buyers, 5–10% down with PMI is the right tradeoff — it gets you into the market sooner and lets you start building equity.

The Rate Environment Matters More Than Most Buyers Realize

A 1% change in interest rate changes your monthly payment by approximately $60–$70 per $100,000 borrowed. On a $400,000 loan, the difference between a 6% and 7% rate is about $240/month — or $2,880/year. Over 30 years, that's $86,400 in additional interest.

This is why your rate matters as much as your purchase price. A $450,000 home at 6% can cost less per month than a $420,000 home at 7%.

The Bottom Line

Affordability is personal. The right number for you depends on your income stability, your existing obligations, your savings, and your risk tolerance. A good rule of thumb: your housing payment should feel comfortable at your current income — not at the income you expect to have in two years.

Start with your monthly payment capacity, work with a licensed advisor to understand your program options, and get pre-approved before you start shopping. Pre-approval gives you a real number — not an estimate.