How Much House Can You Actually Afford? The 28/36 Rule and Beyond

The Question Behind the Question

"How much house can I afford?" is really two different questions wearing the same clothes. The first is: how much will a lender approve me for? The second is: how much can I comfortably pay without sacrificing the rest of my financial life?

These are not the same number. Lenders are in the business of lending, and the amount they'll approve is often more than you should actually spend. Knowing the difference is the key to buying a home that builds your wealth instead of straining it.

The 28/36 Rule

The most durable guideline for housing affordability is the 28/36 rule, and it comes in two parts:

• The 28% front-end ratio: Your total monthly housing payment — principal, interest, property taxes, and insurance (often abbreviated PITI) — should not exceed 28% of your gross monthly income.
• The 36% back-end ratio: All of your monthly debt payments combined — housing plus car loans, student loans, credit cards, and any other debt — should not exceed 36% of your gross monthly income.

If you earn $6,000 a month gross, the 28% rule caps your housing payment at about $1,680, and the 36% rule caps your total debt payments at about $2,160. Lenders use ratios like these to decide what you qualify for.

Why You Should Aim Lower

Here's the catch: the 28/36 rule is calculated on gross income — your pay before taxes, retirement contributions, and health insurance come out. The money that actually lands in your account is considerably less. A payment that's 28% of gross might be 38% or more of your take-home pay.

That's why many financially comfortable homeowners aim lower — closer to 25% of take-home pay for housing. The gap between "approved" and "comfortable" is where financial stress lives. A house at the top of your approval range can leave you "house poor": technically a homeowner, but with no margin for saving, investing, or absorbing surprises.

The Costs Hiding Behind the Mortgage

The mortgage payment is only the beginning. First-time buyers are routinely blindsided by the true cost of ownership:

• Property taxes — hundreds to thousands per year, depending on location.
• Homeowners insurance — required by lenders and rising in many regions.
• Private mortgage insurance (PMI) — typically required if your down payment is under 20%.
• HOA fees — in some communities, a significant monthly cost.
• Utilities — usually higher than in a rental, especially in a larger space.
• Maintenance — the silent budget-killer. A common rule of thumb is to set aside 1% to 2% of the home's value per year for repairs and upkeep. On a $400,000 home, that's $4,000 to $8,000 annually.

A mortgage payment that looks affordable in isolation can become a strain once these costs stack up.

The Upfront Hurdles

Beyond the monthly math, buying requires cash on hand:

• Down payment. While some loans allow as little as 3% down, putting down less means a larger loan, a bigger monthly payment, and usually PMI. A 20% down payment avoids PMI and lowers your payment.
• Closing costs. Typically 2% to 5% of the loan amount, due at signing.
• Reserves. Smart buyers keep an emergency fund separate from their down payment, because homes generate surprise expenses on their own schedule.

A Sensible Way to Decide

Instead of asking "what's the most I can borrow?", flip the question:

1. Start with your take-home pay, not gross.
2. Decide what monthly housing payment you can pay while still saving for retirement and other goals — ideally around 25% of take-home.
3. Work backward from that payment to a home price, accounting for taxes, insurance, and maintenance.
4. Stress-test it. Could you still make the payment if your income dropped, or if you had a major repair? If not, aim lower.

A home you can comfortably afford becomes a foundation for building wealth. A home that stretches you too far becomes a liability that crowds out every other goal.

Model It Before You Commit

Buying a home is likely the largest financial decision you'll ever make, and its effects ripple across decades. Oracle's simulations and free calculators let you test how different home prices, down payments, and monthly payments reshape your long-term net worth — so you can buy with confidence instead of hope.