Quick Answer
The general guideline: Your total housing costs (mortgage + property taxes + insurance + HOA) should not exceed 28% of your gross monthly income, and your total debt payments should not exceed 36%. This is called the 28/36 rule and is the most widely used affordability framework.
| Gross Annual Income | Max Monthly Housing (28%) | Approx. Home Price* |
|---|---|---|
| $60,000 | $1,400 | $195,000 - $225,000 |
| $80,000 | $1,867 | $260,000 - $300,000 |
| $100,000 | $2,333 | $325,000 - $375,000 |
| $120,000 | $2,800 | $390,000 - $450,000 |
| $150,000 | $3,500 | $490,000 - $560,000 |
*Assumes 30-year fixed at 7%, 20% down, no other significant debt. Estimates are approximate.
Key insight: What you qualify for and what you can comfortably afford are often very different numbers. Lenders may approve you for up to 43% DTI. This guide helps you determine YOUR comfortable number.
Calculate Your AffordabilityThe 28/36 Rule Explained
The 28/36 rule is the most widely used affordability guideline in mortgage lending. It consists of two ratios that measure how much of your income goes toward debt:
Front-End Ratio (28%)
Your total monthly housing costs divided by your gross monthly income. Housing costs include: principal + interest + property taxes + homeowners insurance + PMI (if applicable) + HOA fees. This is sometimes called the "housing ratio" or "front-end DTI."
Back-End Ratio (36%)
Your total monthly debt payments (housing + all other debt minimums) divided by your gross monthly income. Other debts include: car payments, student loans, credit card minimums, personal loans, alimony, and child support. For a deeper explanation of how DTI ratios work, see our complete guide.
Worked Example: $100,000 Household Income
Gross monthly income: $8,333
- 28% front-end = $2,333/month maximum housing costs
- 36% back-end = $3,000/month maximum total debt
- If you have $500/month in car and student loan payments: $3,000 - $500 = $2,500 available for housing
In this example, the back-end ratio is less restrictive than the front-end ratio. But if your other debts were $800/month, back-end housing capacity drops to $2,200 -- lower than the front-end limit, making it the binding constraint.
Where the 28/36 rule came from: Fannie Mae and Freddie Mac established these guidelines in the 1990s as a conservative benchmark for conforming mortgage qualification. They remain widely used by lenders and financial advisors today.
Modern lending reality: Many lenders now approve loans up to 43% DTI (the Qualified Mortgage standard) or even 50%+ for some programs. Just because you qualify does NOT mean it is comfortable. Understanding your full PITI payment is essential before committing.
Check Your DTI RatioWhat Lenders Allow vs. What You Can Afford
There is a significant gap between what a lender will approve and what financial advisors recommend as comfortable. This gap is where many homebuyers run into trouble.
| Income $100K | 25% Housing (Conservative) | 28% Housing (28/36 Rule) | 43% Total Debt (Lender Max) |
|---|---|---|---|
| Monthly housing budget | $2,083 | $2,333 | $3,583 |
| Approx. home price | $290K - $330K | $325K - $375K | $500K - $575K |
| Monthly breathing room | High | Moderate | Very low |
What Does "House Poor" Mean?
"House poor" describes a situation where you spend so much on housing that you cannot save for retirement, build an emergency fund, or enjoy your lifestyle. It happens when buyers stretch to the maximum their lender approves without accounting for the full picture of homeownership costs.
- You cannot save 15%+ for retirement while paying the mortgage
- You would have less than 3 months of emergency fund after closing
- You would be in financial crisis if one income earner lost their job
- You are counting on future raises to make payments comfortable
Recommendation: Target 25% of gross income for total housing costs as a conservative, sustainable target. This is especially important for first-time homebuyers who may not yet understand the full scope of homeownership expenses.
Affordability by Salary: Detailed Breakdown
The table below shows the true monthly cost of homeownership at different income levels, including all the hidden costs most buyers overlook. These figures use the conservative 25% guideline adjusted for total costs.
| Annual Income | Home Price Target | Mortgage P&I | Property Tax | Insurance | Maintenance | Total Monthly | % of Gross |
|---|---|---|---|---|---|---|---|
| $60,000 | $200,000 | $1,131 | $183 | $150 | $167 | $1,631 | 33% |
| $80,000 | $280,000 | $1,583 | $257 | $188 | $233 | $2,261 | 34% |
| $100,000 | $350,000 | $1,979 | $321 | $208 | $292 | $2,800 | 34% |
| $120,000 | $425,000 | $2,404 | $390 | $240 | $354 | $3,388 | 34% |
| $150,000 | $525,000 | $2,969 | $481 | $275 | $438 | $4,163 | 33% |
Assumptions: 30-year fixed at 7%, 20% down payment, 1.1% property tax rate, average insurance, 1% annual maintenance. Home price targets are lower than lender maximums. Figures are approximate.
Notice that even with conservative home price targets, total monthly costs run approximately 33-34% of gross income when you include property taxes, insurance, and maintenance. This is why the raw mortgage payment alone gives an incomplete picture. For a salary-specific deep dive, see our guide on how much house you can afford on $80K.
Remember that gross income is not the same as take-home pay. Your actual available cash after federal and state taxes, Social Security, and Medicare will be significantly lower -- making the true housing burden feel larger than the percentage suggests.
Enter Your Income and Debts5 Factors Calculators Do Not Capture
Even the most comprehensive affordability calculator cannot account for these real-world factors that determine whether you love or regret your home purchase:
1. Lifestyle Impact
A larger mortgage means smaller vacations, delayed car replacement, less dining out, and fewer discretionary purchases. Consider honestly: what lifestyle changes are you willing to make? Some people happily sacrifice for homeownership while others become resentful when they realize the tradeoffs.
2. Career Stability
If your income is variable (commission, freelance, seasonal work, or startup equity), use your lowest expected annual income as the basis for affordability, not your best year. A mortgage payment that is comfortable on $120K becomes a crisis on $80K.
3. Future Life Changes
Planning to have children? Childcare costs $10,000 - $20,000+ per year in many areas. Planning to change careers or go back to school? These events reduce your future income available for housing. Buy based on your current financial reality, not optimistic assumptions about the future.
4. Commute Costs
A cheaper house in a distant suburb may cost more after factoring in gas, car wear, tolls, and time. A $30/day commute adds $7,800/year to your effective housing cost. A home that is $50,000 less expensive but adds an hour to your daily commute may not be the bargain it appears.
5. Opportunity Cost of the Down Payment
A $70,000 down payment invested in the stock market at a 7% average return would grow to approximately $137,000 in 10 years. Homeownership offers appreciation too, but the opportunity cost is real. This does not mean you should not buy -- it means the financial comparison is more nuanced than "mortgage payment vs. rent."
Homeownership offers potential tax benefits through the mortgage interest deduction. However, with the increased standard deduction, most homeowners no longer benefit from itemizing. Factor this into your overall affordability calculation.
Frequently Asked Questions
How much house can I afford on a $100K salary?
Using the conservative 25% rule with no other debt, you can afford approximately a $325,000 - $375,000 home (30-year fixed at 7%, 20% down). With $500/month in other debt, this drops to approximately $270,000 - $310,000. Use our Mortgage Affordability Calculator with your specific numbers for a personalized estimate. For another perspective, see our How Much House Can I Afford Calculator.
What is the 28/36 rule?
The 28/36 rule says your total housing costs (mortgage, taxes, insurance, HOA) should not exceed 28% of gross monthly income, and your total debt payments should not exceed 36%. It originated from Fannie Mae and Freddie Mac guidelines. Many financial advisors recommend the more conservative 25% target.
Should I buy the most expensive house I qualify for?
No. Lenders approve based on your ability to make the minimum payment, not on your overall financial health. Buying at the maximum creates financial fragility: no room for emergencies, retirement savings, or lifestyle. A common recommendation is to target 75-80% of your maximum approval.
How much should I budget for home maintenance?
Budget 1-2% of your home's value per year. For a $350,000 home, that is $3,500 - $7,000/year ($292 - $583/month). Newer homes (under 10 years) may need less; older homes may need more. This is money renters do not have to budget for.
Does my down payment size affect affordability?
Yes, significantly. A larger down payment means a smaller loan (lower monthly payment), no PMI if 20%+ down, and potentially a better interest rate. However, depleting your savings for a larger down payment creates risk. Keep at least 3-6 months emergency fund AFTER closing.
How do property taxes affect how much house I can afford?
Property taxes can dramatically affect affordability depending on your state. On a $400,000 home, property taxes range from $1,120/year (Hawaii at 0.28%) to $9,960/year (New Jersey at 2.49%). That is a $735/month difference in housing costs from property taxes alone. Always check the specific tax rate for the area where you plan to buy.
Should I include my spouse's income in affordability calculations?
If both spouses will be on the mortgage and plan to continue working, yes. However, consider: what if one income stops (job loss, childcare, health issue)? Many advisors recommend qualifying on one income and using the second income as a financial buffer for savings and emergencies.
Is renting always throwing money away?
No. Renting can be financially superior in high-cost markets, for short-term stays (under 5 years), or when the price-to-rent ratio is unfavorable. The breakeven point for buying vs. renting is typically 5-7 years due to closing costs and transaction fees. See our Rent vs. Buy Decision Guide for a detailed comparison.
Key Takeaways
- The 28/36 rule is your starting framework: keep total housing costs under 28% of gross income and total debt under 36% -- but many advisors recommend the more conservative 25% target
- What you qualify for (43-50% DTI) is often far more than what is comfortable -- buying at your maximum approval creates "house poor" financial fragility
- Budget 30-50% beyond your mortgage payment for property taxes, insurance, maintenance, PMI, and HOA fees -- these hidden costs are the number one surprise for new homeowners
- Consider lifestyle, career stability, future life changes, and commute costs -- factors that no calculator can capture but that determine whether you love or regret your home purchase
- Use our Mortgage Affordability Calculator for a personalized estimate that includes property taxes, insurance, and your specific debt load
Find Your Comfortable Home Price
Enter your income, debts, and down payment to see a personalized affordability estimate with property taxes, insurance, and current rates included.
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