How Much House Can You Actually Afford?
Buying a home is the largest financial decision most people ever make. Before you browse listings or fall in love with a neighborhood, the most important question to answer is: how much house can you actually afford — not just what a lender will approve, but what you can comfortably sustain for 30 years while still living your life?
The 28/36 Rule: Your Starting Point
The 28/36 rule is the most widely used mortgage affordability guideline. It states that your housing costs should not exceed 28% of your gross monthly income, and your total debt payments should not exceed 36% of gross monthly income.
For a household earning $8,000/month gross:
- Maximum housing payment (28%): $2,240/month
- Maximum total debts (36%): $2,880/month
- If you have $500 in car and student loan payments, your mortgage cap drops to $2,380
The 28/36 rule uses gross income — before taxes. Your take-home pay is significantly less. A mortgage payment that seems fine at 28% of gross income may actually be 35-40% of what you actually receive in your paycheck.
The 3x Income Rule
A simpler guideline: don't buy a home priced more than 3 times your annual household income. On $90,000 combined income, that's a $270,000 home. In expensive cities, buyers stretch to 4-5x income — but this dramatically increases financial stress and reduces resilience to setbacks.
True Monthly Cost of Homeownership
Your mortgage payment is only part of what you'll pay each month. Before deciding on a price range, account for all of these:
| Cost | Typical Amount | Notes |
|---|---|---|
| Principal & Interest | Depends on loan | Your mortgage payment |
| Property Taxes | $300–$700/month | 1–2% of home value annually |
| Homeowner's Insurance | $100–$200/month | Required by lender |
| PMI (if <20% down) | $100–$300/month | Until 20% equity reached |
| HOA Fees | $0–$500+/month | Varies by community |
| Maintenance & Repairs | $250–$400/month | Budget 1% of home value/year |
| Utilities | $150–$400/month | Usually higher than renting |
When you add these up, total homeownership costs are often 40-60% higher than the mortgage payment alone. A $300,000 home with a $1,600 mortgage payment might cost $2,400-2,800/month all-in.
What Lenders Look At
Lenders evaluate four key factors when deciding how much to lend you:
Credit Score
Your credit score determines whether you qualify and at what rate. A 760+ score gets the best rates. Below 620, your options narrow significantly. On a $300,000 loan, the difference between a 620 and 760 score can mean $200+/month in higher payments due to the rate difference alone.
Debt-to-Income Ratio
Most lenders cap DTI at 43%. Some allow up to 50% with strong compensating factors. Lower is better — under 36% is excellent.
Down Payment
20% down eliminates PMI and lowers your monthly payment significantly. But you can buy with as little as 3-3.5% down through various loan programs.
Income Stability
Lenders want 2 years of stable employment history. Self-employed borrowers need 2 years of tax returns. Job changes mid-application can derail approval.
Loan Programs That Change the Calculus
- FHA Loans: 3.5% down with 580+ credit score. More lenient DTI limits.
- VA Loans: 0% down for eligible veterans. No PMI. Outstanding terms.
- USDA Loans: 0% down in eligible rural/suburban areas. Income limits apply.
- Conventional 97: 3% down for first-time buyers through Fannie/Freddie.
- State DPA Programs: Down payment assistance grants in most states.
The Comfort Test
After calculating all the numbers, apply this final test: stare at the total monthly housing cost and ask yourself — can I pay this comfortably for the next 30 years, through job changes, economic downturns, medical emergencies, and family growth? If there's genuine anxiety, the house is too expensive.
Financial advisors often suggest buying at 80-85% of your maximum qualification. This cushion is what separates homeowners who thrive from those who become house-poor.
Calculate Your Monthly Mortgage Payment
Enter your home price, down payment, and rate to get your exact monthly payment.
Try the Mortgage Calculator →Key Takeaways
- Keep total housing costs under 28% of gross monthly income
- Account for ALL costs — taxes, insurance, PMI, maintenance — not just the mortgage
- What a lender approves and what you can comfortably afford are often very different
- First-time buyer programs can dramatically reduce the down payment required
- Buy below your maximum — leave financial breathing room