Loan Affordability Calculator
Part of Mortgage. Use this loan affordability calculator to estimate a maximum loan amount from your income, existing debt payments, target DTI, rate, and term.
Loan Affordability Calculator
Estimate how much you may be able to borrow from gross income, existing monthly debts, a target back-end DTI, and loan rate/term assumptions.
Borrowing capacity
$449,318.73
Principal 43.95% · Interest 56.05%
Max monthly payment at DTI cap$2,840.00
Payment on max loan amount$2,840.00
Total interest over term$573,081.27
Total paid (principal + interest)$1,022,400.00
This models principal and interest only. Property taxes, insurance, HOA, and lender overlays are not included. Many lenders also apply front-end housing limits and reserves requirements.
Explore loan payment by amount
Dedicated pages for common loan sizes—adjust APR and term on each page.
How the Loan Affordability Calculator works
Loan Affordability Calculator
This loan affordability calculator estimates how much principal you may finance given gross monthly income, existing monthly debt payments, a target back-end DTI percentage, interest rate, and loan term.
The result is a principal-and-interest capacity estimate. For home purchases, add property taxes, insurance, HOA, and maintenance to the monthly payment to test true housing affordability.
Conservative planning often uses a lower DTI cap than the program maximum. Running multiple rate and term scenarios helps you see how rate shocks change borrowing power.
Frequently asked questions
How much can I borrow with this calculator?
It estimates a maximum loan amount from gross monthly income, existing monthly debt payments, a target back-end DTI cap, interest rate, and loan term—then amortizes that principal.
What debts should I include?
Include recurring monthly obligations lenders count: auto loans, student loans, minimum credit card payments, personal loans, and other installment debt. Exclude utilities and discretionary spending.
Does this include property taxes and insurance?
No. The result is principal-and-interest capacity only. For mortgages, add estimated taxes, insurance, and HOA to see full housing affordability.
How accurate is this loan affordability calculator?
It is useful for ballpark planning. Lenders also apply credit overlays, reserves, and program-specific limits beyond a simple DTI math check.