House Affordability Calculator
Estimate an affordable home price from income, debts, down payment, interest rate and housing costs
Estimated affordable home price
How we calculated it
About the House Affordability Calculator
House affordability is broader than the largest mortgage payment a lender might approve. Income, existing debts, down payment, interest rate, taxes, insurance and ongoing housing costs all affect how much purchase price fits a household budget.
This calculator turns those inputs into an estimated price or payment range. It should be used as a planning boundary, not as a guarantee that a lender will approve the same amount.
How to Use the House Affordability Calculator
- Enter gross household income and recurring monthly debt obligations.
- Enter available down payment and the mortgage rate and term you want to test.
- Add property taxes, homeowners insurance, association dues and mortgage insurance where the calculator supports them.
- Compare the result with your actual monthly budget and keep room for maintenance, utilities and savings.
How the Calculation Works
The calculator estimates the housing payment supported by the selected debt-to-income or affordability assumptions, then solves the mortgage-payment relationship for the loan amount that fits that payment.
The available purchase price is derived from the supported loan amount plus down payment, while recurring taxes, insurance and other housing costs reduce the amount available for principal and interest.
Worked example
House Affordability Calculator Worked Example
Why existing debt reduces affordability
If a household can devote $3,000 per month to total debt and already has $800 of recurring debt payments, only about $2,200 remains within that assumed limit for housing-related debt service before other modeled housing costs are considered.
Result guide
Understanding Your House Affordability Calculator Result
A calculated maximum is not necessarily a comfortable target. If the result leaves little cash for repairs, emergency savings or changes in income, use a lower purchase-price scenario.
Before you rely on the answer
Assumptions and Limitations
- Income and recurring debt figures are accurate and stable enough for planning.
- Mortgage rate, taxes and insurance reflect a realistic purchase scenario.
- Lender underwriting standards and individual credit decisions can differ from the calculator assumptions.
Practical tip
Using This Result in Practice
Run the calculation with a higher interest rate and a realistic maintenance reserve. Affordability that disappears after a modest change may be too close to the edge of the household budget.
Related calculations
Useful Calculations to Continue With
If you want to understand the debt-ratio part of the affordability calculation first, use the Debt-to-Income Ratio Calculator.
Once you choose a tentative loan amount, use the Mortgage Calculator to inspect the payment and total interest in more detail.
Common questions
House Affordability Calculator FAQ
Is the most I can borrow the same as the most I can afford?
No. Lender approval focuses on underwriting rules, while personal affordability should also account for savings goals, maintenance, utilities and lifestyle expenses.
Why does the interest rate affect home price so much?
A higher rate uses more of the available monthly payment for interest, which reduces the principal amount that can be supported by the same payment.
Should I include property taxes and insurance?
Yes when estimating real housing affordability. Omitting them can make the affordable home price look significantly higher.