The 28/36 Rule: How Much Mortgage Can You Afford?

What Is the 28/36 Rule and Why Does It Matter?

The 28/36 rule is the most widely used guideline for determining how much mortgage you can responsibly afford. It consists of two ratios that together paint a complete picture of your debt capacity and housing affordability.

The front-end ratio (28%) states that your total monthly housing costs — including principal, interest, property taxes, homeowners insurance, and any HOA fees — should not exceed 28% of your gross monthly income. This is also called the "housing ratio" or "PITI ratio" (Principal, Interest, Taxes, Insurance).

The back-end ratio (36%) states that your total monthly debt obligations — housing costs plus all other recurring debts like car payments, student loans, credit card minimums, and personal loans — should not exceed 36% of your gross monthly income. This is your total debt-to-income ratio (DTI).

These ratios are not arbitrary numbers. They are derived from decades of mortgage lending data that shows borrowers who stay within these limits are significantly less likely to default on their loans. The Federal Housing Finance Agency, which oversees Fannie Mae and Freddie Mac, uses these ratios as baseline qualification criteria for conventional mortgages.

A Simple Example

Let us say your household gross income is $8,333 per month ($100,000 per year). Applying the 28/36 rule:

Maximum housing payment (28%): $8,333 x 0.28 = $2,333/month
Maximum total debt payments (36%): $8,333 x 0.36 = $3,000/month

If you have a $400/month car payment and $200/month in student loans, your existing non-housing debt is $600/month. Under the back-end ratio, your maximum housing payment would be $3,000 - $600 = $2,400/month. Since the front-end ratio limits you to $2,333, the more restrictive ratio applies — your maximum housing payment is $2,333.

Why the 28/36 Rule Matters More Than Ever in 2026

In a low-rate environment, the 28/36 rule is relatively forgiving because lower rates mean lower payments for any given home price. But as rates have risen from the 3% range to 6.38%, the rule has become much more binding. Higher rates mean higher payments, which means you need more income to qualify for the same home — or you qualify for a cheaper home on the same income.

The practical impact has been enormous. A household earning $100,000 per year could qualify for a home priced at approximately $420,000 in 2021 when rates were around 3%. That same household, at today's 6.38% rate, qualifies for only about $310,000 — a reduction of $110,000 in purchasing power, or roughly 26%. This is why so many Americans feel priced out of the housing market despite earning solid incomes.

Income-to-Home-Price Table at Current Rates

The following tables show exactly how much home you can afford at the current 6.38% rate using the 28/36 rule. These calculations assume a 20% down payment, property tax rate of 1.1% of home value, annual homeowners insurance of $1,800, and no other monthly debts (which means the 28% front-end ratio is the binding constraint).

Maximum Home Price by Annual Income (6.38% Rate, 20% Down)

$60,000 income: Maximum housing payment $1,400/month → Maximum home price $215,000
$75,000 income: Maximum housing payment $1,750/month → Maximum home price $275,000
$85,000 income: Maximum housing payment $1,983/month → Maximum home price $310,000
$100,000 income: Maximum housing payment $2,333/month → Maximum home price $365,000
$120,000 income: Maximum housing payment $2,800/month → Maximum home price $440,000
$150,000 income: Maximum housing payment $3,500/month → Maximum home price $555,000
$175,000 income: Maximum housing payment $4,083/month → Maximum home price $650,000
$200,000 income: Maximum housing payment $4,667/month → Maximum home price $745,000

How Other Debts Reduce Your Maximum Home Price

The table above assumes zero non-housing debt. Here is how common debt obligations reduce your purchasing power at a $100,000 income:

$300/month car payment: Maximum home price drops from $365,000 to $320,000
$500/month car payment: Maximum home price drops to $285,000
$400/month student loans: Maximum home price drops to $300,000
$300 car + $400 student loans ($700 total): Maximum home price drops to $250,000

This is where the 36% back-end ratio becomes the binding constraint. With $700/month in existing debts on $100,000 income, your maximum total debt payment is $3,000 (36% of $8,333). After subtracting $700 in existing debts, your maximum housing payment is only $2,300 — which is below the $2,333 allowed by the front-end ratio alone.

The Dramatic Impact of Interest Rates on Affordability

To illustrate how much rates matter, here is the maximum home price for a household earning $100,000 per year (20% down, no other debts) at different rates:

3.0% (2021 rates): $420,000
4.0%: $390,000
5.0%: $365,000
5.5%: $350,000
6.0%: $340,000
6.38% (current): $327,000
7.0%: $310,000
8.0%: $280,000

From 3% to 6.38%, the same household lost approximately $93,000 in purchasing power. This is one of the most significant affordability challenges in the current housing market and explains why so many potential buyers are struggling to find homes within their budget. Use our home affordability calculator to run these numbers for your specific income, debts, and down payment.

FHA, VA, and Other Exceptions to the 28/36 Rule

The 28/36 rule applies primarily to conventional mortgages backed by Fannie Mae and Freddie Mac. However, several government-backed loan programs use more lenient DTI guidelines, which can significantly expand your purchasing power.

FHA Loans: Up to 43% DTI (Sometimes Higher)

The Federal Housing Administration (FHA) allows a maximum DTI of 43% for most borrowers, and in some cases will approve borrowers with DTIs up to 50% if they have strong compensating factors such as excellent credit, significant cash reserves, or a history of successfully managing similar payment levels.

FHA loans also allow down payments as low as 3.5% with a credit score of 580 or above. Here is how FHA guidelines change the affordability picture for a $100,000 income household:

Conventional (28/36 rule, 20% down): Maximum home price $365,000
FHA (43% DTI, 3.5% down, no other debts): Maximum home price approximately $395,000
FHA (50% DTI with compensating factors): Maximum home price approximately $445,000

However, FHA loans come with additional costs that partially offset the higher qualification limits:

Upfront Mortgage Insurance Premium (UFMIP): 1.75% of the loan amount, typically financed into the loan
Annual Mortgage Insurance Premium (MIP): 0.55% of the loan amount per year, paid monthly for the life of the loan (unlike PMI on conventional loans, which can be removed at 20% equity)

The lifetime MIP requirement is the biggest drawback of FHA loans. On a $380,000 loan at 6.38%, the monthly MIP is approximately $174/month, and it never goes away unless you refinance into a conventional loan. Over 30 years, that is approximately $62,640 in mortgage insurance premiums. For many borrowers, reaching 20% down payment to qualify for a conventional loan without PMI is the better long-term financial decision.

VA Loans: No Front-End Ratio, No Down Payment

For eligible veterans, active-duty service members, and surviving spouses, VA loans offer the most generous qualification criteria of any mortgage product:

No front-end ratio limit: There is no cap on what percentage of income goes to housing costs
Maximum DTI: 41% guideline, but can be exceeded with compensating factors
No down payment required: 100% financing is available
No mortgage insurance: Despite no down payment, VA loans do not require PMI or MIP

For a veteran earning $100,000 with no other debts, the VA loan qualification is dramatically different:

Conventional (28/36 rule, 20% down): Maximum home price $365,000
VA (41% DTI, 0% down): Maximum home price approximately $440,000

VA loans do charge a funding fee (typically 2.15% for first-time use with no down payment), but this is a one-time cost that can be financed into the loan. There is no ongoing mortgage insurance charge, which makes VA loans the most cost-effective mortgage product available to those who qualify.

USDA Loans

The USDA Rural Development program offers zero-down-payment loans in eligible rural and suburban areas with DTI limits of 29% front-end and 41% back-end. Income limits apply (generally 115% of area median income), and the property must be in a USDA-eligible location. For buyers in qualifying areas, USDA loans offer conventional-like terms with no down payment requirement.

How Today's Rates Compare to the Past: The Affordability Squeeze

To fully grasp the 28/36 rule's impact in 2026, it helps to see how mortgage affordability has changed over time. The combination of higher home prices and higher rates has created the worst affordability environment in over 40 years, according to the National Association of Realtors' Housing Affordability Index.

The Numbers Tell the Story

Consider a household earning the national median income, which is approximately $80,000 in 2026. Here is what they could afford at different points in history, applying the 28/36 rule with 20% down:

2012 (3.66% rate, $177k median home): Could afford $290,000 — 64% above median price
2019 (3.94% rate, $274k median home): Could afford $280,000 — 2% above median price
2021 (2.96% rate, $347k median home): Could afford $335,000 — 3.5% below median price
2024 (6.72% rate, $420k median home): Could afford $240,000 — 43% below median price
2026 (6.38% rate, $447k median home): Could afford $255,000 — 43% below median price

The trend is stark. In 2012, a median-income household could comfortably afford a home well above the median price. By 2026, that same household (adjusted for income growth) can only afford a home that is 43% below the median. This means the typical American family would need to look at homes priced significantly below the national median — which limits options to smaller homes, less desirable locations, or both.

The Income Required for the Median Home

Working the 28/36 rule in reverse reveals how much income you need to afford the median-priced home of $447,000:

At 3.0% (2021): Required income approximately $89,000
At 5.0%: Required income approximately $105,000
At 6.38% (current): Required income approximately $122,000
At 7.0%: Required income approximately $132,000

At current rates, you need a household income of at least $122,000 to qualify for the median-priced home under the 28/36 rule with 20% down. According to Census data, only about 30% of U.S. households earn $125,000 or more. This means the median home is out of reach for approximately 70% of American households under standard affordability guidelines — a remarkable and historically unusual situation.

Regional Variations

National averages mask enormous regional differences. Here is the income required for the median home in several major metros:

San Jose, CA ($1.45M median): Required income $395,000
San Francisco, CA ($1.1M median): Required income $300,000
Los Angeles, CA ($870K median): Required income $237,000
New York, NY ($680K median): Required income $185,000
Denver, CO ($540K median): Required income $147,000
Dallas, TX ($380K median): Required income $104,000
Cleveland, OH ($210K median): Required income $58,000

These regional differences highlight why location is such a critical factor in the affordability equation. A teacher earning $65,000 might comfortably afford a home in Cleveland but be completely priced out in Denver or Los Angeles.

Strategies to Improve Your 28/36 Numbers

If the 28/36 rule indicates you cannot afford the home you want at current rates, there are concrete steps you can take to improve your numbers. Some of these are quick fixes; others require longer-term planning.

Reduce the 36% Back-End Ratio: Pay Down Debt

The fastest way to improve your mortgage qualification is to reduce or eliminate existing debts. Every dollar of monthly debt you eliminate directly increases your mortgage capacity:

Pay off a $300/month car loan: Increases your max home price by approximately $48,000
Pay off $200/month in credit card minimums: Increases your max home price by approximately $32,000
Pay off $400/month student loan: Increases your max home price by approximately $64,000

The math is compelling. If you have $10,000 in savings that you could use as either a larger down payment or to pay off a $300/month car loan, paying off the car loan is almost always the better choice. The $10,000 reduces your home price by only $10,000 (and your loan by the same), saving you roughly $62/month. But eliminating the $300/month car payment frees up $300/month toward your housing budget, increasing your maximum home price by $48,000. Use our debt payoff calculator to create a plan for eliminating debts before your home purchase.

Increase the 28% Front-End Ratio: Boost Income

Increasing your income is the most powerful way to expand your homebuying budget because it improves both ratios simultaneously. Options include:

Add a co-borrower: A spouse's or partner's income counts toward qualification. Even a part-time income of $25,000 adds approximately $40,000 to your max home price
Document all income sources: Bonuses, overtime, commissions, rental income, and side business income can all count if properly documented (typically 2 years of history required)
Ask for a raise or promotion: Timing a raise before your mortgage application directly increases your qualification amount
Start a side income: While lenders typically want 2 years of history, some programs accept 1 year for certain income types

Reduce the Home Price: Creative Approaches

If your income and debts are fixed, the remaining variable is the home price itself. Strategies to get more home for less money include:

Look in adjacent neighborhoods: Moving one zip code over can reduce prices by 10-20% in many metro areas
Consider condos or townhomes: These typically cost 15-30% less than single-family homes in the same area
Buy a fixer-upper: Homes that need cosmetic work often sell at a 10-15% discount. An FHA 203(k) loan lets you finance both the purchase and renovations in a single mortgage
Negotiate aggressively: In the current market, many sellers are willing to negotiate. Properties that have been listed for 30+ days are particularly good targets for below-asking offers

Improve Your Rate: Better Credit = Lower Payment

Your interest rate directly affects your monthly payment and therefore your qualification under the 28/36 rule. Improving your credit score can lower your rate, which increases your purchasing power:

Score 620-679: Rate approximately 7.0% → Max home price on $100k income: $295,000
Score 680-719: Rate approximately 6.6% → Max home price: $325,000
Score 720-759: Rate approximately 6.38% → Max home price: $340,000
Score 760+: Rate approximately 6.15% → Max home price: $355,000

The difference between a 620 and a 760+ credit score can mean $60,000 more in purchasing power. If your score is below 760, take steps to improve it before applying: pay down credit card balances below 30% of limits, correct any errors on your credit reports, and avoid opening new accounts in the months before your application.

Beyond the 28/36 Rule: A Complete Affordability Picture

While the 28/36 rule is an excellent starting point, it does not capture the full picture of housing affordability. A truly comprehensive affordability assessment considers several additional factors that the simple ratios miss.

The Hidden Costs of Homeownership

The 28/36 rule's front-end ratio includes principal, interest, taxes, and insurance (PITI). But actual homeownership costs extend well beyond these items:

Maintenance and repairs: Budget 1% to 2% of the home's value annually. On a $400,000 home, that is $4,000-$8,000/year, or $333-$667/month
Utilities: The average American homeowner pays approximately $300-$500/month for electricity, gas, water, sewer, and trash — often significantly more than apartment utilities
HOA fees: If applicable, these average $250-$400/month for condos and $100-$200/month for single-family communities
Homeowners insurance increases: Insurance costs have been rising 12-15% annually in many states and may continue to outpace inflation
Property tax increases: While capped in some states, property taxes can increase significantly, especially after a reassessment following purchase

When you add these costs to the PITI payment, the true cost of homeownership is often 30% to 50% higher than the mortgage payment alone. A more realistic affordability rule might be the 35% rule — your total housing costs (including maintenance, utilities, and everything else) should not exceed 35% of your gross income.

The Emergency Fund Factor

Before buying a home, you should have an emergency fund covering 3 to 6 months of total expenses (including the new mortgage payment) — separate from your down payment and closing costs. A home purchase that depletes your savings to zero is risky, because homeownership inevitably brings unexpected expenses: a broken water heater, a leaking roof, a failed HVAC system. Without reserves, these emergencies become financial crises. Use our emergency fund calculator to determine how much you should have saved before buying.

The Opportunity Cost of Homeownership

Money spent on a home is money not invested elsewhere. Before committing to the maximum home price the 28/36 rule allows, consider whether buying less house and investing the difference might build more wealth over time. This is particularly relevant for younger buyers who have decades of compound growth ahead of them.

For example, buying a $300,000 home instead of a $365,000 home reduces your monthly payment by approximately $400/month. Investing that $400/month in a diversified index fund earning an average of 8% annually would grow to approximately $590,000 over 30 years. That is wealth-building potential that should not be ignored in the homebuying equation. Our compound interest calculator can help you model these investment scenarios.

Use the Rule as a Ceiling, Not a Target

Perhaps the most important takeaway about the 28/36 rule is that it represents the maximum you should spend, not the amount you should aim for. Many financial advisors recommend targeting housing costs of 20% to 25% of gross income rather than the full 28%. This lower target provides more breathing room for saving, investing, enjoying life, and handling the unexpected expenses that come with homeownership.

To get a comprehensive picture of what you can truly afford, use our home affordability calculator, which factors in all of these costs and gives you a realistic budget based on your complete financial picture. Pair it with the mortgage payment calculator to see exact monthly payments at different price points and rates, and you will have the data you need to make a confident, well-informed decision about one of the biggest financial commitments of your life.