Home Affordability Calculator

Annual Gross Income ($)

Monthly Debt Payments ($)

Down Payment ($)

Interest Rate (%)

Loan Term (years)

Property Tax Rate (%/yr)

Home Insurance ($/yr)

HOA Dues ($/mo)

Target Debt-to-Income Ratio: 36%

About Home Affordability Calculator

This calculator estimates the maximum home price you can comfortably afford by combining your income, existing debts and a target debt-to-income ratio with real mortgage costs — principal, interest, taxes, insurance, HOA dues and PMI. Adjust the DTI slider to see how a more conservative or more aggressive budget changes your buying power.

Results

Affordable Home Price

Estimated Total Monthly Payment (PITI)

Summary

Enter values to see your results.

Home Affordability Formula

Max Monthly Housing Budget

Max Payment = (Annual Income ÷ 12) × DTI% − Monthly Debts

Loan Amount From Payment

Loan = M × [(1+r)ⁿ − 1] ÷ [r(1+r)ⁿ], where r = monthly rate, n = number of payments

Home Price

Home Price = Loan Amount + Down Payment

Total Payment (PITI)

PITI = Principal & Interest + Property Tax + Insurance + HOA

Quick Reference: DTI Ranges

DTI Range	Description	Typical Fit
Under 28%	Conservative	Comfortable cushion for savings
28–36%	Standard	Most conventional loan guidelines
36–43%	Stretch	Tighter monthly budget
43–50%	Aggressive	Often requires strong credit / FHA flexibility
Over 50%	High Risk	Rarely approved by conventional lenders

Front-End vs Back-End DTI

Front-end DTI only counts housing costs; back-end DTI (used here) adds in all other monthly debts too.

Important Note

This is an educational estimate; actual lending decisions depend on credit score, reserves, loan program and underwriting guidelines.

Key Terms Explained

Affordability isn't just the home price — it's every recurring cost tied to owning it.

💰 PITI

Principal, Interest, Taxes and Insurance combined.
The full recurring cost lenders qualify you against.
HOA dues and PMI are often added on top.

📊 Debt-to-Income Ratio

Total monthly debt payments divided by gross monthly income.
Lower DTI generally means more borrowing flexibility.
Lenders use this as a core qualification metric.

🏦 Down Payment

Cash paid upfront, reducing the loan amount.
20% down typically avoids private mortgage insurance.
A larger down payment increases affordable home price.

🛡️ PMI

Private Mortgage Insurance protects the lender, not you.
Usually required when down payment is below 20%.
Can typically be removed once enough equity is built.

Where It's Used

🏠 First-Time Home Buyers

Get a realistic starting budget before house hunting.

🔄 Refinancing Decisions

See how a new rate or term changes your monthly budget.

📈 Relocation Planning

Compare affordability across different cities and tax rates.

🧾 Pre-Qualification Prep

Walk into lender conversations with realistic numbers.

🏢 Realtor Client Consults

Quickly frame a buyer's realistic price range.

📊 Budget Stress Testing

See how rate or income changes affect buying power.

Worked Examples

Example 1 — Standard Buyer

Income $95,000, debts $350/mo, down payment $40,000, rate 6.75%, 36% DTI → affordable home price ≈ $365,000.

Example 2 — Conservative Budget

Same buyer using a 28% DTI instead of 36% → affordable home price drops to roughly $280,000.

Example 3 — Larger Down Payment

Increasing the down payment to $80,000 raises affordable home price by roughly the full extra down payment amount, plus any PMI savings.

Best Practices & Common Mistakes

✅ Best Practices

Use your actual gross income, not take-home pay.
Include all recurring debts — cars, student loans, credit cards.
Get a real rate quote rather than guessing.
Leave room in your budget for maintenance and emergencies.
Re-run the numbers if your down payment or rate changes.

❌ Common Mistakes

Ignoring property taxes and insurance in the budget.
Maxing out DTI without a savings cushion.
Forgetting HOA dues in condo or planned communities.
Using pre-tax income assumptions incorrectly.
Assuming pre-qualification guarantees final loan approval.

Frequently Asked Questions

A common guideline is spending no more than 28-36% of your gross monthly income on your total housing payment, though this calculator lets you adjust that ratio to match your own comfort level.

Yes, it factors in estimated property taxes, homeowners insurance, HOA dues and PMI to arrive at a realistic total monthly payment and affordable home price.

Most conventional lenders prefer a back-end DTI at or below 36%, though some programs allow up to 43-50% depending on credit profile and loan type.

No. This is an educational estimate only. Actual pre-approval depends on your lender's underwriting guidelines, credit history and documented income.

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