Mortgage Affordability Calculator
Find out how much home you can afford based on your income, monthly debts, down payment, and interest rate. See your maximum home price, estimated monthly payment, and debt-to-income ratio instantly.
How Mortgage Affordability Works
Mortgage affordability depends on several key factors: your gross monthly income, existing debt obligations, the down payment you can make, the interest rate offered by your lender, and the loan term. Lenders typically use the 28/36 rule, meaning your housing costs should not exceed 28% of gross monthly income, and total debt payments should stay below 36%. This calculator applies these industry-standard guidelines to estimate the maximum home price you can realistically target. Your debt-to-income ratio is the single most important factor lenders evaluate when deciding how much to lend you.
Understanding Debt-to-Income Ratio
Your DTI ratio compares your total monthly debt payments to your gross monthly income. A front-end DTI of 28% or less is ideal for housing costs alone. A back-end DTI of 36% or less covers all debts including car payments, student loans, and credit cards. Some loan programs allow DTI ratios up to 43% or even 50%, but higher ratios mean higher risk and potentially worse interest rates. Lowering your existing debts before applying for a mortgage can dramatically increase the home price you qualify for.
Tips to Maximize Your Buying Power
Pay down high-interest debt to lower your DTI ratio. Save a larger down payment to reduce the loan amount needed. Improve your credit score to qualify for better interest rates. Consider a longer loan term for lower monthly payments, though you will pay more interest over time. Shop multiple lenders to find the best rate. Factor in property taxes, insurance, and maintenance costs that are not included in the mortgage payment itself. Getting pre-approved gives you a clear budget and makes your offer stronger when competing with other buyers.
Tips for Getting Accurate Results
For the most accurate results, use up-to-date numbers from official sources. Double-check your inputs before calculating — small errors in the starting values can lead to significantly different outputs. If you are comparing scenarios, keep all variables the same except the one you are testing. Save or screenshot your results for future reference. This calculator uses standard formulas and is designed to give you a reliable quick estimate, though professional advice may be needed for complex situations.