How much house can you actually afford?

The number a lender approves and the number you can comfortably live with are rarely the same. Knowing the difference is the single most important thing you can do before house-hunting.

How lenders decide what you can borrow

Lenders work backwards from your income using debt-to-income ratios. A common guideline caps your housing payment at roughly 28% of gross monthly income, and your total debt payments — housing plus car loans, student loans, credit cards, and everything else — at around 36%. These are the '28/36' ratios, and while individual lenders and loan programs vary, the logic is consistent: the more of your income already committed to other debts, the less is left for a mortgage.

That means two people with identical incomes can afford very different homes. Someone with no other debt has the full housing allowance available; someone with a large car payment and student loans has far less. The mortgage you qualify for is the residual after your existing obligations are subtracted from the lender's ceiling — not a flat multiple of salary.

The costs hiding inside the monthly payment

A mortgage quote usually shows principal and interest, but your actual monthly housing cost is larger. Property taxes, homeowner's insurance, and — where they apply — HOA or condo fees and private mortgage insurance all sit on top. Together these can add hundreds of dollars a month, and they scale with the home's value and location rather than your loan.

This is where buyers get caught. A payment that looks affordable on principal-and-interest alone can quietly become a stretch once taxes and insurance are added. When you judge affordability, always work from the all-in monthly payment, not just the loan portion. The free calculator lets you fold taxes, insurance, and fees into the number so you're comparing like with like.

Down payment, rate, and the price they unlock

Your down payment does two things: it reduces the amount you borrow, and — above certain thresholds — it can remove mortgage insurance and improve your rate. A larger down payment therefore raises the price you can afford twice over, by shrinking the loan and lowering its cost per dollar borrowed.

Interest rates matter just as much. Because a mortgage is amortized over decades, small rate changes move the affordable price meaningfully: a higher rate means more of each payment goes to interest, so the same monthly budget supports a smaller loan. Running a few rate scenarios before you shop tells you how sensitive your budget is and stops a rate move from derailing your plans.

Affordable versus comfortable

Qualifying for a payment and being comfortable with it are different questions. The lender's ratios don't know about your retirement savings goals, childcare costs, travel, or how much financial cushion helps you sleep. Many buyers deliberately borrow below their maximum so the mortgage leaves room for everything else that matters to them.

A useful exercise is to pick the payment you'd be genuinely happy making every month for years — including the taxes and insurance — and work back to the price that produces it. That's your comfortable number, and it's often lower than the maximum. Buying at the comfortable number, not the ceiling, is what keeps a home an asset rather than a source of stress.

Putting it together

Start with your gross monthly income, subtract your existing debt payments, and apply a housing percentage you're comfortable with to find your target payment. Fold in taxes and insurance to get the all-in figure, then convert that — at today's rate and your down payment — into a home price. That price, not the lender's maximum, is where your search should begin.

The free home affordability calculator does this in seconds, and the full planner lets you test different rates, down payments, and budgets side by side so you walk into house-hunting knowing exactly what fits. It's assumptions-driven and not financial advice — but it turns a vague worry into a concrete, defensible number.

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