Mortgage calculator
Mortgage Affordability Calculator
Estimate your maximum affordable home purchase price based on income, debt, and DTI.
Built for U.S. financial rules and mortgage conventions.
September 2026
Enter your details
Results update privately in your browser.
Understand the estimate
What your result means
This is a planning estimate, not a mortgage approval or preapproval. Lenders may use different debt, income, credit, reserve, and property requirements.
The estimate reserves room within your target debt-to-income ratio for principal, interest, property taxes, insurance, and HOA dues. Your down payment is added separately.
Important considerations
Before you decide
- Using take-home pay instead of gross income.
- Leaving out recurring monthly debt payments.
- Assuming the estimate includes every lender or ownership cost.
How we calculate
A transparent estimate you can inspect.
Formula
Calculates maximum affordable home price by solving for total monthly housing capacity (PITI + HOA) within your target Debt-to-Income (DTI) ratio minus existing monthly debt payments, combined with your available down payment.
Privacy
Your values are calculated locally and are not sent to a server by this calculator.
Use with care
Results are for informational purposes, not financial, tax, legal, lending, or investment advice.
Understanding your results
The result is a planning estimate based on the DTI and housing-cost assumptions you entered.
Assumptions and limitations
- Not a lender approval amount.
- Underwriting requirements vary by lender.
Common questions
Before you decide
Is this a mortgage approval?
No. This is a planning estimate, not an approval or preapproval.
What housing costs are included?
It models principal, interest, property tax, homeowners insurance, and HOA within the entered DTI target.