How Much House Can You Really Afford? A First-Time Buyer's Guide

Getting pre-approved for a mortgage is exciting. The number the bank gives you — the maximum you qualify to borrow — can feel like a budget. It isn't. Lenders determine what you can qualify for based on their risk tolerance, not your life goals. The question of how much house you can afford is one you need to answer yourself, using your own numbers.

The 28/36 Rule

The most widely used guideline in personal finance is the 28/36 rule. It says your housing costs should consume no more than 28% of your gross monthly income, and your total debt payments should not exceed 36% of your gross monthly income.

Housing costs for this calculation include your mortgage principal and interest, property taxes, homeowners insurance, and HOA fees if applicable — everything it actually costs to own the home each month, not just the mortgage payment itself.

Example: If your gross monthly income is $6,000, the 28% rule puts your maximum housing cost at $1,680/month. The 36% rule limits your total debt payments (housing plus car loans, student loans, credit cards) to $2,160/month.

What the Bank Looks at vs. What You Should Look at

Banks will often approve DTI ratios up to 43–50%, especially for FHA loans. That means they may happily lend you enough to consume half your income in debt payments. This is legal and common — and it can leave you financially fragile, with no room for emergencies, retirement savings, or lifestyle.

Apply the 28/36 rule to your situation and compare it to what you've been pre-approved for. If the bank says you qualify for $450,000 but the 28% rule puts your comfortable limit at $320,000, shop in the $320,000 range. The pre-approval ceiling is not a target — it's a boundary on what the bank will lend, not what you should borrow.

The Costs People Forget

First-time buyers routinely underestimate the full cost of homeownership. Your mortgage payment is the starting point, not the total. Budget for:

• Property taxes — varies dramatically by location. Can be $200–$1,500+/month.
• Homeowners insurance — typically $100–$250/month depending on location and coverage.
• Private mortgage insurance (PMI) — required if your down payment is less than 20%. Usually $50–$200/month.
• Maintenance and repairs — a widely used rule is to budget 1% of the home's value per year. A $300,000 home should have $3,000/year ($250/month) in your budget for upkeep.
• Utilities — often higher than renting, especially in older homes or larger spaces.
• HOA fees — in condos and many planned communities, these can be $200–$800/month.

Down Payment: How It Affects What You Can Afford

A larger down payment reduces your loan size, which lowers your monthly payment and eliminates PMI once you hit 20% equity. A 20% down payment on a $350,000 home is $70,000 — a significant barrier for many buyers. But even the difference between 5% down ($17,500) and 10% down ($35,000) reduces your monthly payment and total interest meaningfully.

The trade-off: depleting your savings for a bigger down payment leaves you with less emergency fund. Don't put down so much that you'd have trouble covering a $10,000 repair in the first year of ownership.

A Practical Approach

1. Calculate 28% of your gross monthly income — that's your maximum total housing cost.
2. Subtract estimated property taxes, insurance, PMI, and HOA fees from that number.
3. What remains is your maximum mortgage payment. Use a mortgage calculator to find the home price that payment corresponds to at today's rates.
4. Stress-test it: can you still pay the mortgage if your income drops by 20%? If not, consider buying at a lower price point.