How Much House Can I Afford? The 28/36 Rule Explained (2026 Edition)

The 28/36 Rule Explained

The 28/36 rule is the single most widely-used affordability guideline in home buying. It's been standard in mortgage lending for decades because it works — it balances what you can technically borrow against what leaves room for a sustainable life.

The rule has two parts. Both apply at the same time.

The 28% Front-End Ratio (Housing Only)

Your total monthly housing payment — principal, interest, property taxes, homeowners insurance, PMI if applicable, and HOA fees — should not exceed 28% of your gross monthly income (before taxes).

Example: If you earn $6,000/month gross, your maximum housing payment is 28% × $6,000 = $1,680/month.

This is sometimes called PITI (Principal, Interest, Taxes, Insurance). It's the full cost of owning your home, not just the loan payment most quick calculators show.

The 36% Back-End Ratio (All Debt)

Your total monthly debt — housing plus car loans, student loans, credit card minimums, child support, and any other recurring obligations — should not exceed 36% of gross monthly income.

Example: With $6,000/month gross income, your maximum total debt is 36% × $6,000 = $2,160/month. If you have a $500 car payment and $300 in student loans ($800 existing debt), your housing budget drops to $2,160 − $800 = $1,360/month — lower than the 28% front-end limit would suggest.

The more other debt you carry, the less house you can afford. This is why paying down a car loan or student loans before applying for a mortgage can significantly increase your buying power.

Gross Income, Not Take-Home

Both ratios use gross income — before taxes, before retirement contributions, before health insurance. This is an important caveat. On a $100,000 salary, you might only take home around $70,000 after federal taxes, state taxes, and 401(k) contributions. The 28/36 rule calculates against the full $100,000, which means the actual burden on your take-home pay is higher than it appears.

This is one reason many housing experts now recommend targeting 25-30% of gross income (or roughly 35-40% of take-home) rather than the full 28% — especially in high-tax states.

Exact Affordability by Salary

Below are realistic home price ranges for common salary levels, using current market assumptions:

• Interest rate: 6.5% (average 30-year fixed, early 2026)
• Loan term: 30 years
• Property tax: 1.2% of home value per year
• Home insurance: $1,200 per year
• PMI: 0.5% per year (applies if less than 20% down)
• No other debts (student loans, car payments, etc. will reduce these figures)

$50,000 Salary

Monthly gross: $4,167 → Max housing under 28%: $1,167/month

• With 10% down: Home price around $175,000 – $200,000
• With 20% down: Home price around $200,000 – $225,000
• With FHA loan (3.5% down, 31% limit): Home price around $195,000 – $220,000

At this income level, you'll likely need to look at condos, townhomes, or homes in lower-cost metros. Only about 21% of homes currently listed in the US are affordable at this salary level — a stark drop from 49% in 2019.

$75,000 Salary

Monthly gross: $6,250 → Max housing under 28%: $1,750/month

• With 10% down: Home price around $270,000 – $310,000
• With 20% down: Home price around $310,000 – $355,000

This is the sweet spot for many mid-market US cities — suburbs of Dallas, Austin, Charlotte, or Raleigh. Still challenging in Seattle, Boston, or the Bay Area.

$100,000 Salary

Monthly gross: $8,333 → Max housing under 28%: $2,333/month

• With 10% down: Home price around $370,000 – $425,000
• With 20% down: Home price around $425,000 – $490,000

A $100K salary is often considered the "American middle-class income," but buying power varies dramatically by location. A $400,000 home is a mansion in Ohio and a fixer-upper in San Jose.

$125,000 Salary

Monthly gross: $10,417 → Max housing under 28%: $2,917/month

• With 10% down: Home price around $465,000 – $530,000
• With 20% down: Home price around $530,000 – $610,000

$150,000 Salary

Monthly gross: $12,500 → Max housing under 28%: $3,500/month

• With 10% down: Home price around $555,000 – $640,000
• With 20% down: Home price around $640,000 – $730,000

$200,000 Salary

Monthly gross: $16,667 → Max housing under 28%: $4,667/month

• With 10% down: Home price around $745,000 – $860,000
• With 20% down: Home price around $860,000 – $980,000

At this income level, you have flexibility even in high-cost markets. However, the jump from $150K to $200K doesn't proportionally double your buying power because the 28% ceiling scales linearly with income — it's still 28% either way.

See Your Exact Numbers with Our Calculator

The table above uses national averages. Your real affordability depends on specifics — your actual credit score, the property tax rate in your zip code, your HOA fees if applicable, and your existing debts. Plugging these into a calculator gives you accurate numbers in 30 seconds.

Our mortgage calculator has a dedicated Affordability tab that shows a live 28/36 gauge. Enter your income and current housing target — the gauge fills green if you're under 28%, yellow if you're between 28-36%, and red if you're over. You see instant visual feedback on whether your target home price fits the comfort zone.

Beyond the 28/36 Rule: Other Factors That Matter

The 28/36 rule is a starting point, not the full story. Five other factors can meaningfully change what you should pay — sometimes raising it, often lowering it.

1. Credit Score Impact

Your credit score directly determines your interest rate, and rate changes have dramatic effects. A borrower with a 780+ score might lock a 6.3% rate, while a borrower at 640 might get 7.3% — a full percentage point higher.

On a $300,000 30-year loan, that 1% rate difference costs an extra $200/month and $72,000 over the life of the loan. Improving your score from 680 to 740 before applying can increase your affordability by 10-15% or more.

2. Down Payment Size

A larger down payment has three compounding effects on affordability:

• Lower loan amount → lower monthly payment
• No PMI at 20%+ → save $100-400/month
• Better interest rate → lenders offer best rates to 20%+ down borrowers

Combining these effects, moving from 5% down to 20% down on a $400,000 home can reduce your monthly payment by roughly $650/month — or let you afford a $450,000 home at the same monthly cost.

3. Interest Rate Sensitivity

Every 1% change in mortgage rates changes affordability by approximately 10%. At 6% on a $300,000 home, your P&I is $1,799. At 7%, the same loan costs $1,996 — $197/month more. Rates move based on Fed policy and economic conditions, so timing matters.

4. Location (Property Taxes)

Property taxes vary dramatically by state. New Jersey residents pay roughly 2.5% of home value annually, while Hawaii residents pay about 0.3%. On a $400,000 home, that's the difference between $10,000/year and $1,200/year in taxes — a $733/month swing.

Example: a $400,000 home affordable in Texas at $50,000 salary might be unreachable in Illinois at the same salary due to property tax differences.

5. HOA Fees and Condo Assessments

HOA fees often surprise first-time buyers. Condos and townhomes can have HOA fees of $300-$1,000+/month. A condo listed at $350,000 with $600/month HOA is effectively equivalent to a $400,000 single-family home when factoring HOA into the 28% calculation.

Always ask for HOA fees upfront and include them in your affordability math.

The Hidden Costs Most Calculators Miss

Here's an uncomfortable truth: even a full PITI calculation understates the true cost of homeownership. The 28/36 rule was designed for housing payment to lender — but homeownership has other costs you'll absorb regardless.

Maintenance: The Silent Budget-Killer

Experts suggest budgeting 1-2% of home value annually for maintenance. On a $400,000 home, that's $4,000-$8,000/year, or $333-$667/month. This includes HVAC maintenance, plumbing repairs, roof replacement (eventually), appliance replacement, yard care, and the 1,001 small repairs every home requires.

The average homeowner severely underestimates this. Many families find that in years when a major repair hits (new roof, HVAC replacement), they spend $15,000-$25,000 in a single year. This is why a robust emergency fund matters more for homeowners than renters.

Utilities (Higher Than Renting)

Homes are typically larger than rental units and have more square footage to heat, cool, and light. Expect utilities of $250-$500/month depending on home size and climate — more than most apartment utilities.

Closing Costs (One-Time, But Huge)

Closing costs typically run 2-5% of the purchase price. On a $400,000 home, that's $8,000-$20,000 upfront — in addition to your down payment. These fees include lender fees, title insurance, appraisal, inspection, prepaid taxes and insurance, and attorney fees (in some states).

If you're stretching to reach 20% down payment, don't forget you also need several thousand more on top for closing.

Furniture and Setup

First-time buyers routinely spend $5,000-$20,000 in the first year on furniture, appliances, window treatments, tools, and initial repairs. Build this into your budget, not just your mortgage math.

The 25-30% Reality Rule

When you add up maintenance, utilities, and reserves for major repairs, a home "affordable" at 28% of gross income often costs closer to 35-40% of gross income once you include everything. This is why many financial planners now suggest targeting 25% of gross income on PITI rather than 28% — it leaves room for the true costs of ownership.

Approved vs Actually Affordable: A Critical Distinction

Here's a common and expensive mistake: equating "how much a lender will approve me for" with "how much house I can afford."

Lenders are in the business of lending money. Their risk models cap borrowers at 43-50% DTI for conventional loans — not because 43% is comfortable, but because that's roughly the statistical boundary where default rates rise sharply. Qualifying at 43% DTI isn't a recommendation; it's a ceiling.

What Your Lender Sees

Lenders calculate based on:

• Gross monthly income
• Reported monthly debts (from credit report)
• Credit score

That's it. Their model assumes your other expenses — food, childcare, health insurance, transportation, savings, entertainment, vacations, emergencies — can fit into the remaining 57-72% of your gross income after debt payments.

What Your Lender Ignores

Your lender doesn't factor in:

• Childcare costs — $1,500-$3,000+/month in many metros
• Retirement savings — you should save 15-20% of income, not zero
• Emergency fund contributions — 3-6 months expenses minimum
• Healthcare costs — deductibles, out-of-pocket maxes
• Lifestyle expectations — hobbies, dining out, travel
• Planned major expenses — car replacement, kids' education

The Real Math

If you earn $100,000/year, that's $8,333/month gross but only around $6,000-$6,500/month take-home after federal tax, state tax, Social Security, Medicare, and health insurance. If your lender approves you at 43% DTI ($3,583/month in housing + debt), you're spending 55-60% of your actual take-home pay on debt — leaving little room for anything else.

The aggressive approval feels great when you're house-shopping. It feels terrible when you're three years in, a roof repair hits, and you realize you have no savings buffer.

How to Afford More House (Strategically)

If the affordability ranges above feel disappointing, there are legitimate ways to increase your buying power without taking on reckless debt.

1. Save a Larger Down Payment

Every dollar of down payment removes a dollar from your loan. But the effects go beyond that: 20% down eliminates PMI ($100-$400/month), often secures a lower interest rate (saving $100-$200/month), and reduces total monthly payment. Combined, moving from 10% to 20% down can increase your affordable home price by 15-20%.

2. Pay Off High-Interest Debt First

Every $100/month in minimum debt payments reduces your housing budget by about $278/month under the 36% back-end rule — which equals roughly $40,000 less in affordable home price at current rates. Paying off a $5,000 credit card with a $150/month minimum frees up about $60,000 in buying power.

3. Improve Your Credit Score

As shown earlier, a 60-point credit score improvement can save 0.5-1% on your interest rate. Strategies that work in 3-6 months:

• Pay down credit cards to under 30% utilization (ideally under 10%)
• Don't apply for new credit in the 6 months before a mortgage
• Dispute any errors on your credit report
• Become an authorized user on a responsible family member's old credit card

4. Increase Your Down Payment with First-Time Buyer Programs

Many states and cities offer down payment assistance for first-time buyers — typically $5,000-$25,000. These programs can unlock the 20% down threshold that dramatically improves affordability. Research programs through your state housing authority.

5. Consider a Smaller Starter Home

A common mistake: buying the "forever home" before you can actually afford it. A smaller starter home that fits comfortably at 22-25% of income lets you build equity, improve your credit through consistent payments, and upgrade in 5-7 years with significantly more buying power.

6. Add a Co-Borrower

If you're buying with a spouse or partner, combining incomes can substantially increase affordability. Just make sure both names go on the mortgage — which has implications for both credit scores and both being liable.

7. Look at 15-Year Mortgages (Counterintuitively)

Shorter loans often have lower rates (0.25-0.5% lower). While the monthly payment is higher, the rate difference can mean you qualify for a similar home at a slightly better rate. This is niche advice — only relevant if you have income stability and can comfortably afford the higher monthly payment. Read more in our 15 vs 30 year mortgage guide.

Affordability Rules by Country

The 28/36 rule is US-specific. Buyers in other countries use different frameworks, but the principle — housing shouldn't crowd out the rest of your financial life — is universal.

The DoItSwift mortgage calculator supports 35 currencies, so regardless of your country, you can calculate affordability in your own currency with appropriate local rates.