How Much House Can You Actually Afford?

Most buyers start the process backward. They browse listings first, fall in love with a price point second, and ask what they can afford third. By the time the calculator shows up, the emotional decision has already been made. That is how people end up stretching into payments that technically close but do not feel healthy six months later.

The market context makes that risk larger in 2026. According to the FRED series MORTGAGE30US, the average 30-year fixed mortgage rate was 6.48% for the week ending June 4, 2026. Higher rates mean the same house now consumes more monthly income than it did a few years ago. Zillow's housing research has also spent the last year emphasizing affordability pressure and the importance of local market differences, which is why a national headline number is never enough by itself.

The deeper problem is that lenders and buyers are solving different questions. A lender asks whether you fit underwriting guidelines and can likely repay the loan. You are asking whether the payment still leaves room for retirement savings, childcare, travel, repairs, a new transmission, a health bill, or the possibility that one income disappears for a while. Those are not the same standard.

Real affordability starts when you stop asking, “How much will the bank lend me?” and start asking, “What payment can my household carry without making the rest of life fragile?” That shift sounds small, but it changes the whole calculation.

Takeaway: Affordable is not the same as approvable. The safest number is the one that still works when life is ordinary, expensive, and mildly annoying all at once.

The classic starting point is the 28/36 rule. The front-end ratio says housing costs should stay near or below 28% of gross monthly income. The back-end ratio says all recurring debt payments together should stay near or below 36% of gross monthly income. Those numbers are not magic, but they give lenders and borrowers a common language for discussing payment pressure.

Here is what that looks like in practice. On a salary of $75,000, gross monthly income is $6,250. The 28% rule gives you about $1,750 for housing. The 36% rule gives you about $2,250 for all debt combined. At $100,000 of gross income, those numbers rise to about $2,333 for housing and $3,000 for total debt. At $150,000, the limits are about $3,500 and $4,500.

Lenders like these rules because they are fast, standardized, and correlated with repayment capacity. They help underwriters compare households consistently. But consistency is not the same as comfort. A household paying for daycare, elder care, high health premiums, or aggressive retirement savings may find 28% too aggressive. A buyer moving to a high-tax county with HOA dues may discover that the front-end ratio fills up before the principal-and-interest payment even looks extreme.

That is why many buyers should treat 28/36 as an upper boundary, not a target. If your income is variable, if one spouse plans to stop working, if you expect to have children soon, or if you simply hate living paycheck to paycheck, a tighter rule can be smarter. Some households feel much better around 25% for housing and 33% for total debt.

Takeaway: The 28/36 rule is a useful screen, but it is not a permission slip. Your real affordability may need to be lower.

Lenders often focus on PITI: principal, interest, taxes, and insurance. Buyers need to go further. The real monthly cost of owning a home usually includes principal and interest, property taxes, homeowners insurance, HOA dues if applicable, maintenance, and utilities that can be significantly higher than what you paid as a renter.

Take a $400,000 home with a 20% down payment and a 30-year mortgage at 6%. The loan amount is $320,000, which creates a principal-and-interest payment of about $1,918.56 per month. If property taxes run at 1.1% of value, that adds about $367 per month. If insurance costs about $150 per month and HOA dues are $120, the payment is already around $2,556 before maintenance. Add the common 1% annual maintenance planning rule, or about $333 per month, and you are at about $2,889. Add an extra $150 for higher utilities and you are closer to $3,039.

That is the trap. A buyer can look at the mortgage payment and think the house costs about $1,900 per month, when the lived cost is much closer to $3,000. This is exactly why buyers feel blindsided after closing. The mortgage was not the whole housing budget.

Property taxes are especially dangerous because they vary enormously by location. The planning table below is not a legal tax quote. It is an illustration of how state and local differences can change affordability even before you compare neighborhoods. Always confirm with the county assessor or local tax office before making an offer.

Those tax differences alone can swing affordability by more than $400 per month on the same house price. That is why a national calculator is only the first step. CFPB's mortgage tools also stress that fees, points, mortgage insurance, and closing costs all matter in addition to rate. The smartest buyers run the monthly number with local tax assumptions before they ever trust a listing budget.

Takeaway: If your affordability math does not include taxes, insurance, maintenance, HOA, and utilities, it is not affordability math yet.

Debt-to-income ratio is the bridge between your income and your housing ceiling. Monthly debt obligations divided by gross monthly income gives you the percentage lenders care about. If a household earns $100,000 per year, gross monthly income is about $8,333. If housing would cost $2,700 and existing debts total $700, total monthly debt becomes $3,400 and the back-end DTI is about 40.8%. That may be approvable in some loan programs, but it is clearly tighter than the classic 36% rule.

Existing debt changes everything. A $550 student loan payment, $425 car payment, and $120 minimum credit card payment can erase hundreds of thousands of dollars of purchase power. Buyers often focus on down payment while ignoring recurring debt drag. But lenders price recurring obligations much more heavily than savings sitting in a bank account.

Two-income households also need to think beyond today's pay stubs. Is both income stable? Are bonuses a normal part of compensation or a best-case bonus? Is one spouse likely to cut hours after children arrive? Is one job commission-based or cyclical? If the house only works with both incomes maxed out and no interruption, that is not a resilient setup.

Job stability matters because a mortgage is a long commitment and a short underwriting moment. A lender evaluates your current picture. You have to live through the next recession, the next industry shakeup, the next layoff wave, or the next period when one person wants to change careers. Conservative buyers often run the calculator twice: once on current income and once on a reduced-income scenario. If the reduced-income version is impossible, the purchase may still be fine, but the risk is visible instead of hidden.

Takeaway: Affordability is not just about income. It is about how much of that income is already spoken for, how stable it is, and how much flexibility you want to preserve.

Purchase price is only the visible part of buying a house. The hidden layer includes closing costs, immediate repairs, moving costs, new appliances, window treatments, furniture, and all the ugly maintenance surprises sellers never frame as a lifestyle feature.

Closing costs alone often run about 2% to 5% of the purchase price, depending on the loan, taxes, title charges, and prepaid items. On a $400,000 home, that means about $8,000 to $20,000 in cash on top of the down payment. Then many homes need something quickly: paint, flooring, water heater replacement, gutter work, HVAC service, or a roof issue the inspection did not turn into a dramatic enough warning.

Moving costs are smaller but still real. A local move can cost a few hundred to a few thousand dollars. A long-distance move can be much more. Then comes furnishing. Even disciplined buyers spend money on a lawn mower, locks, shelving, curtains, a washer-dryer setup, light fixtures, or rooms that suddenly look empty because the new house is bigger than the old apartment.

A useful planning assumption is that the “real cash to move in” number may be $20,000 to $30,000 above the down payment for many normal transactions. It can be lower, but it can also be far higher if the home is older, the market is expensive, or the property needs immediate systems work. Foundation concerns, an aging roof, old plumbing, and deferred maintenance do not care that you already feel stretched by the down payment.

Takeaway: Do not use your entire cash pile to get the keys. A house that empties the bank account on day one often feels unaffordable before the first year is over.

The standard benchmark is 20% down because it usually avoids private mortgage insurance on conventional loans and lowers the monthly payment immediately. On a $400,000 home, 20% down means $80,000 up front and a $320,000 loan. At 6.5% over 30 years, principal and interest would be about $2,023 if the rate were slightly higher, or about $1,919 at 6.0%. The benefit is obvious. Lower loan balance, lower monthly obligation, and more breathing room.

A 10% down strategy can still be reasonable, especially for buyers who want to preserve reserves. On a $400,000 home with a $360,000 loan at 6.5%, principal and interest is about $2,275.44. The buyer may also owe PMI. A rough planning number for PMI is often around 0.3% to 1% of the loan balance annually, depending on credit and loan details. Even at 0.5%, that is about $150 per month on a $360,000 loan.

At 5% down, the loan rises to about $380,000 and the same 6.5% mortgage payment becomes about $2,401.86 before taxes, insurance, and PMI. That extra leverage may be worth it for a buyer entering an expensive market early, but it clearly raises the monthly burden. FHA-style low-down-payment options can reduce the cash hurdle even more. CFPB notes that FHA loans can be less expensive than conventional loans for some borrowers with lower credit scores and down payments under about 10% to 15%, but the insurance structure is different and can remain for longer.

The right down payment is not automatically the largest one you can scrape together. Sometimes preserving a stronger emergency fund beats eliminating PMI immediately. Other times the PMI cost is so large that waiting to save more makes sense. The best move is to compare the monthly savings from a bigger down payment against the value of the cash you would give up.

Takeaway: A larger down payment improves affordability, but draining your reserves to avoid PMI can create a different kind of risk.