How Much House Can I Afford? The 28/36 Rule Explained

One of the most common questions first-time homebuyers ask is: how much house can I afford? The answer depends on more than just your income. Lenders look at your debts, your credit score, your down payment, and your monthly obligations — all before deciding how large of a mortgage they will approve. But before you even talk to a lender, there is a simple rule of thumb that financial planners and housing experts have relied on for decades: the 28/36 rule.

What Is the 28/36 Rule?

The 28/36 rule is a guideline that helps buyers estimate a comfortable mortgage payment relative to their income. It works like this:

• 28% rule: Your monthly housing costs — including principal, interest, property taxes, and homeowners insurance (often called PITI) — should not exceed 28% of your gross monthly income.
• 36% rule: Your total monthly debt obligations, including your housing payment plus car loans, student loans, credit cards, and other recurring debts, should not exceed 36% of your gross monthly income.

These two thresholds work together to keep your housing costs sustainable. If your gross household income is ,000 per month, the 28% rule suggests your mortgage payment should stay at or below ,240. The 36% rule says all your debts combined — including that mortgage — should not exceed ,880 per month.

Why 28% and 36%? Where Do These Numbers Come From?

These percentages emerged from decades of mortgage lending experience. Lenders found that borrowers who kept housing costs below 28% of income were far less likely to default on their loans. The 36% total-debt ceiling accounts for the reality that most Americans carry other financial obligations alongside a mortgage. Together, these thresholds define what lenders traditionally call a qualifying ratio.

It is worth noting that modern lending has loosened somewhat. Some loan programs allow a front-end ratio as high as 31% and a back-end ratio up to 43% or even 50% in some cases. But staying within the classic 28/36 boundaries gives you a real financial cushion and keeps your budget healthy over the long term.

How to Apply the 28/36 Rule to Your Situation

Let us walk through a practical example. Suppose you and your partner have a combined gross income of 5,000 per year, which works out to roughly ,917 per month.

• Maximum housing payment (28%): ,917 × 0.28 = ,217 per month
• Maximum total debt (36%): ,917 × 0.36 = ,850 per month

If you already carry 00 per month in car payments and student loan obligations, your remaining budget for housing drops to ,250 per month. That lines up well with the 28% ceiling, so you are in good shape — but you can see how existing debts quickly eat into your home buying power.

What Monthly Payment Translates to in Home Price?

Knowing your maximum monthly payment is only part of the picture. You also need to translate that payment into a purchase price. At current mortgage rates, a rough rule is that every ,000 of home price adds roughly to to your monthly payment (for a 30-year fixed mortgage). That means a ,000 monthly principal-and-interest payment might support a home price somewhere in the range of 30,000 to 00,000 depending on your interest rate and down payment.

This is where a home buying calculator becomes essential. Small changes in interest rate — even a quarter of a percent — can shift your buying power by 0,000 to 0,000 or more.

Other Factors Lenders Consider

The 28/36 rule is a starting point, not the finish line. Lenders also evaluate:

• Credit score: A higher score unlocks lower interest rates, directly increasing what you can afford.
• Down payment size: Putting down 20% eliminates private mortgage insurance (PMI), reducing your monthly cost.
• Loan type: FHA loans, VA loans, and conventional loans all have different qualification criteria.
• Employment history: Stable, consistent income over two or more years strengthens your application.
• Cash reserves: Lenders want to see that you will have money left after closing.

Should You Borrow Up to Your Maximum?

Just because a lender approves you for a certain amount does not mean you should borrow every dollar. Many financial advisors recommend being more conservative than the 28/36 rule — especially if you anticipate major expenses like children, car replacements, or career changes in the coming years. A budget-friendly mortgage gives you flexibility to save for retirement, build an emergency fund, and enjoy life without feeling house-poor.

The Bottom Line

The 28/36 rule is one of the most reliable tools for answering the question every buyer faces: how much house can I afford? Start with your gross income, apply the percentages, and factor in your existing debts. Then use an interactive calculator to test different purchase prices, down payments, and interest rates until you find a monthly payment you are genuinely comfortable with — not just one a lender will approve.

Use our free mortgage calculator to estimate your monthly payment and find out how much home you can afford.

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The 28/36 Rule: Your Quick-Start Mortgage Affordability Checklist

Confused about what the 28/36 rule actually means for YOUR home purchase? This isn’t just a numberu2014it’s the lender’s formula that determines whether you qualify for a mortgage and how much you can borrow. Here’s what you need to know right now:

• The 28% Rule: Your monthly housing costs (mortgage, taxes, insurance) shouldn’t exceed 28% of your gross monthly income. Earn $5,000/month? Your housing payment should stay under $1,400.
• The 36% Rule: All your debt payments combinedu2014including that car loan, credit cards, and your mortgageu2014shouldn’t exceed 36% of gross income. This is the real ceiling most lenders enforce.
• Why lenders care: These percentages predict loan default risk. Stay within them, and you’re a safe bet. Exceed them, and you’ll face loan denial or higher interest rates.

The gap between these rules matters: You might pass the 28% test but fail the 36% test if you’re carrying significant debt. This is where most first-time buyers get stuck. Before applying for a mortgage, paying down existing debts can dramatically improve your borrowing power.

Real scenario: A $60,000 annual earner can technically afford a $1,400 monthly housing payment (28% rule), but if they have $800 in car and student loan payments, their total debt service hits $2,200u2014which exceeds the 36% threshold of $1,800. Same income, same home price, but the debt changes everything.

Want to see exactly how much house YOU can afford based on your specific income and debts? Our mortgage affordability calculator breaks down both rules and shows you your exact borrowing limit in seconds.

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Frequently Asked Questions

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Quick Reference: The 28/36 Rule Calculator & 2026 Guidelines

The 28/36 rule remains the gold standard for mortgage affordability in 2026, but understanding exactly how it applies to YOUR situation is what separates approved borrowers from rejected applications. This rule uses two critical percentages that lenders check before approving your loan.

• The 28% threshold: Your monthly housing costs (mortgage, taxes, insurance, HOA) cannot exceed 28% of your gross monthly income
• The 36% threshold: Your total debt payments (housing + car loans + credit cards + student loans) cannot exceed 36% of your gross monthly income

Why both numbers matter: A bank might approve you under the 28% housing rule, but reject you on the 36% debt rule if you’re carrying significant other obligations. Most lenders use whichever is MORE restrictive for your financial profile.

Real Numbers: What This Means in 2026

If you earn $80,000 annually ($6,667 monthly):

• Maximum monthly housing payment: $1,867 (28% of income)
• Maximum total debt payments: $2,400 (36% of income)

This accounts for rising interest rates and updated lending standards that have become stricter since 2024. Some lenders now prefer borrowers at 43% total debt ratios, but the 28/36 rule remains the baseline qualification standard across major mortgage institutions.

The critical action: Calculate both your percentages before house hunting. If your other debts push you near the 36% ceiling, paying down credit cards or car loans first could unlock an additional $50,000-$100,000 in home buying poweru2014without earning another dollar.

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Related: How to Calculate How Much House You Can Afford