House Affordability Calculator

Buying a home is the largest financial transaction most people will ever make. Determining exactly how much property you can safely afford before you start house-hunting protects you from becoming "house poor." The Calculay House Affordability Calculator dynamically cross-references your gross income alongside modern lending standards (DTI) to output a responsible purchase maximum.

The 28/36 Debt-to-Income Rule

Mortgage lenders, credit unions, and financial advisors universally rely on the "28/36 Rule" to determine your mortgage eligibility. It consists of two strict thresholds:

The 28% Front-End Ratio: Your total monthly housing costs (principal, interest, property taxes, homeowner's insurance, PMI, and HOA fees) should absolutely not exceed 28% of your gross monthly income (your income before taxes).
The 36% Back-End Ratio: Your total monthly debt obligations (your housing costs PLUS auto loans, student loans, minimum credit card payments) should not exceed 36% of your gross monthly income.

Our calculator instantly evaluates both rules in real-time, defaulting to the stricter ratio to provide your maximum purchase threshold safely. If you carry heavy secondary debts (like high student loans), the 36% back-end ratio will often drastically lower your housing budget.

Hidden Costs: Property Tax, Insurance, and HOA

A massive mistake first-time home buyers make is looking exclusively at the P&I (Principal & Interest) payment. A $400,000 home might have an affordable $2,200 P&I payment, but once you bundle in property taxes, home insurance, and potential Private Mortgage Insurance (PMI), your actual monthly check to the bank could easily exceed $3,000.

Pro Tip (The 20% Down Payment): If you can afford to put down 20% or more of the purchase price upfront, lenders will waive PMI (Private Mortgage Insurance). This insurance protects the bank (not you) and can easily add $100 to $300 a month in "dead weight" cost to your payment.