🏘️ 🏘️ How Much House Can I Afford? Affordability Guide

Buying a home is the largest financial decision most people make. Knowing how much house you can actually afford — not just how much a lender will approve you for — prevents years of financial stress. Lenders approve the maximum amount based on their risk; your real affordability depends on your lifestyle, savings goals, and long-term plans.

The Two Key Affordability Metrics

1. The 28/36 Rule

The most widely used affordability guideline:

• Front-end ratio (28%): Monthly housing costs (PITI — Principal, Interest, Taxes, Insurance) should not exceed 28% of gross monthly income
• Back-end ratio (36%): Total monthly debt payments (housing + all other debts) should not exceed 36% of gross monthly income

Some lenders allow up to 43% back-end DTI, and FHA loans use a 31/43 rule. The 28/36 rule is the conservative, comfortable guideline.

2. Debt-to-Income Ratio (DTI)

DTI = Total Monthly Debt Payments ÷ Gross Monthly Income × 100

Example: Monthly debts of $2,000 on a $6,000 gross income = 33% DTI. Most lenders prefer below 36–43%.

Step-by-Step: How Much House Can You Afford?

Step 1: Calculate your maximum housing payment

Gross monthly income × 28% = Maximum housing payment

Example: $80,000/year ÷ 12 = $6,667/month × 0.28 = $1,867/month maximum PITI

Step 2: Account for existing debts

Check if the 36% back-end limit is more restrictive:

$6,667 × 36% = $2,400 total debt limit

If you have $500/month in car and student loans: $2,400 − $500 = $1,900 available for housing

In this case, the back-end limit ($1,900) is more restrictive than the front-end ($1,867), so use $1,867.

Step 3: Back out taxes and insurance

Your $1,867 maximum housing payment includes taxes and insurance (PITI). Estimate:

• Property taxes: ~$250–400/month (varies heavily by location)
• Homeowners insurance: ~$150–250/month
• Available for principal + interest: $1,867 − $300 (taxes) − $200 (insurance) = $1,367/month P+I

Step 4: Calculate maximum loan amount

Working backwards from the $1,367 P+I at current rates (7%, 30 years):

Maximum loan ≈ $1,367 ÷ ($1 per $1,000 at 7% 30yr factor of $6.65 per $1,000)

= $1,367 ÷ 0.00665 = approximately $205,000 loan amount

Step 5: Add your down payment

Maximum home price = Loan amount + Down payment

With 20% down: $205,000 ÷ 0.80 = $256,000 maximum home price

With 10% down: $205,000 ÷ 0.90 = $228,000 maximum home price (but PMI adds cost)

The True Cost of Homeownership: Beyond the Mortgage

Many first-time buyers underestimate the total cost of owning a home. Beyond PITI, budget for:

• Maintenance and repairs: 1%–4% of home value per year. A $250,000 home requires $2,500–$10,000 annually for maintenance. Set aside $200–$800/month in a home repair fund.
• HOA fees: $100–$700/month in communities with homeowners associations
• Utilities: Often higher than renting (larger space, lawn maintenance, etc.)
• Moving costs: $1,000–$5,000 depending on distance and volume
• Closing costs: 2%–6% of loan amount, due at purchase
• Furnishing and upgrades: New homeowners often spend $5,000–$20,000 outfitting a new space

Down Payment: How Much Do You Really Need?

Renting vs. Buying: The Break-Even Calculation

Buying is not always better than renting. The key question is: how long will you stay in the home? Calculate your break-even point:

Break-even = (Buying costs − Renting costs) ÷ Monthly savings from buying

If closing costs and transaction costs total $15,000, and buying saves you $200/month vs. renting: break-even = $15,000 ÷ $200 = 75 months (6.25 years). If you might move in 3–4 years, renting may be the better financial choice.

5 Signs You Are Ready to Buy

1. Housing costs will stay below 28% of gross income with a comfortable buffer
2. You have 20% down payment plus 2–4% for closing costs in savings
3. 3–6 months of living expenses in a separate emergency fund
4. Credit score above 740 (for best rates)
5. You plan to stay in the area for at least 5–7 years