House Affordability Calculator

How much house can you afford? Uses the 28/36 rule

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Maximum Affordable Home Price
Max Monthly Payment (28% Rule)$0
Max Monthly Payment (36% Rule)$0
Down Payment Required$0
Loan Amount$0

Monthly Breakdown

About the House Affordability Calculator

This house affordability calculator uses the standard 28/36 rule to determine the maximum home price you can afford. It factors in your income, monthly debts, down payment, interest rate, property taxes, and insurance for a realistic budget. Beyond just a maximum price, this tool provides a detailed monthly breakdown showing exactly how much goes toward principal, interest, taxes, insurance, and PMI. Understanding these components helps you set realistic expectations and avoid becoming house poor.

How to Use This Calculator

  1. Enter your annual income, down payment, and monthly debt payments.
  2. Input the interest rate, loan term, property tax, and insurance costs.
  3. Click Calculate to see your maximum affordable home price and monthly breakdown.

The Formula

The calculator applies the 28% front-end ratio (housing costs vs income) and 36% back-end ratio (total debt vs income), taking the lower of the two limits.

Max Payment = min(Income × 28%, Income × 36% - Monthly Debts)

Frequently Asked Questions

What is the 28/36 rule?

The 28/36 rule states that no more than 28% of your gross monthly income should go to housing costs, and no more than 36% should go to total debt payments including your mortgage.

Does my credit score affect affordability?

Yes, a higher credit score qualifies you for lower interest rates, which increases your purchasing power. It can also affect PMI requirements and loan approval.

What is the 28/36 rule and why does it matter?

The 28/36 rule states that housing costs should not exceed 28% of your gross monthly income, and total debt payments should not exceed 36%. Lenders use these ratios to determine how much you can borrow.

Does the calculator account for PMI?

Yes, the calculator automatically adds PMI when your down payment is less than 20% of the home price. PMI typically costs 0.3% to 1.5% of the loan amount annually.

How does my debt-to-income ratio affect affordability?

A high DTI reduces your borrowing power because more of your income is committed to existing debts. Most lenders prefer a DTI below 36%, though some allow up to 43-50% with strong compensating factors.

What other costs should I consider besides the mortgage?

Beyond your mortgage, budget for property taxes (typically 0.5-2.5% of home value), homeowners insurance ($800-$2,000/year), maintenance (1% of home value annually), utilities, and HOA fees if applicable.

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