Mortgage Affordability
Estimate the monthly housing budget left after other debt using gross monthly income and a target total debt-to-income ratio. For a home-price estimate, use the detailed mortgage tools.
Formula / method
income*dti/100-debt
How to use
Use the rate, time period, fees and cash-flow assumptions that match the real quote or account you are evaluating.
What this calculator answers
The Mortgage Affordability calculator uses gross monthly income, a target total debt-to-income ratio and other monthly debt to estimate the monthly budget left for housing. It is a cash-flow screening tool, not a lender approval or home-price estimate.
How to get a useful result
Use the rate, time period, fees and cash-flow assumptions that match the real quote or account you are evaluating.
How to interpret it
Treat the result as an estimate. Taxes, lender rules, compounding conventions, fees and timing can change the real amount.
Before relying on the number
Recheck unusual inputs, confirm units and compare the result with any official quote, statement, specification or rule that applies to the real decision. Small changes in rates, time periods or measurements can materially change some results.