Home Affordability Calculator
How much house can you afford? Enter your income and debts to find out.
How to Use This Calculator
Income
Enter your gross annual household income — the combined total before taxes. This is the starting point lenders use to determine how much mortgage payment you can handle each month.
Monthly debts
Add up your recurring monthly obligations: car payments, student loans, credit card minimums, personal loans, and any other fixed debt payments. The calculator subtracts these from your allowable monthly housing budget.
More Options
Expand "More Options" to fine-tune your estimate. You can adjust the down payment amount, interest rate, loan term (15 or 30 years), debt-to-income ratio (DTI), property tax rate, and homeowners insurance. These all affect how much home you can afford.
Share your result
Every input is encoded in the URL. Click Share, send the link — they'll see your exact numbers. No re-entering, no screenshots.
The Formula
Lenders use your debt-to-income ratio to cap your total monthly obligations. The calculator works backwards from that cap to find the maximum home price you can afford.
Max Loan = Payment × [(1 + r)n − 1] ÷ [r × (1 + r)n]
where r = monthly interest rate, n = number of payments
Max Home Price = Max Loan + Down Payment
The first line determines how much of your monthly income is available for a mortgage after existing debts. The second line is the present-value annuity formula — it converts a monthly payment into the total loan amount a lender will approve. Adding your down payment gives the maximum purchase price.
Example
Mark & Lisa — shopping for their first home
Mark and Lisa have a combined income of $120,000 and $800/month in existing debt payments. They've saved $80,000 for a down payment and are looking at 30-year fixed mortgages at 6.5%. Their lender uses a 36% DTI limit.
Inputs
Result
With $80,000 down and a $340K mortgage, Mark and Lisa can afford a home up to roughly $420,000 while staying within lender guidelines.