House Affordability Calculator

About the House Affordability Calculator

Before searching for homes or talking to a real estate agent, knowing how much house you can actually afford saves enormous time and prevents heartbreak. Our house affordability calculator uses the same debt-to-income (DTI) guidelines that mortgage lenders use, so your affordability estimate reflects what you'll actually qualify for — not just what sounds appealing. We account for your income, existing debts, down payment, estimated taxes, and insurance.

How It Works

Lenders typically allow a maximum front-end DTI of 28–31% (housing costs as percentage of gross monthly income) and a maximum back-end DTI of 43–45% (all monthly debts including housing). The lower of these two limits determines your maximum mortgage payment. From that payment, we work backward using current interest rates to determine the maximum loan amount, then add your down payment to find the maximum home price.

Tips & Best Practices

• ✓Get pre-approved before house hunting — it sets a firm budget and strengthens offers.
• ✓Property taxes and insurance (together called PITI with principal and interest) add 20–30% to a mortgage payment.
• ✓HOA fees count as housing cost in DTI calculations — factor them into your affordability.
• ✓Don't borrow your maximum — leave room for maintenance (budget 1–2% of home value annually).
• ✓FHA loans allow DTI up to 50% with compensating factors, but this stretches most budgets dangerously thin.

Who Uses This Calculator

First-time homebuyers, people relocating to more expensive markets, and anyone reentering the housing market after a financial reset use this calculator to set realistic home search parameters. Knowing your number before you fall in love with a house is invaluable.