Affordability Calculator Use the calculator below to give you an idea of how much of a mortgage you can afford. However, it is meant to be a guideline, not a rule. We have many programs available that can maximize the amount of a home you can afford. Desired mortgage amount: Mortgage length (in years) Interest % Annual property tax Total monthly payments not including mortgage (car, loans, credit cards, etc). Summary Monthly Principal + Interest Total Monthly Obligations Required Salary Listed below are the basic guidelines of how our industry determines how much of a mortgage payment you qualify for. Your gross (before taxes) monthly salary should be greater than 28% of the sum of the monthly mortgage and monthly tax payments. Your gross (before taxes) monthly salary should be greater than 36% of the sum of the monthly mortgage, monthly tax and other monthly debt payments. Loan Calculators are tools designed to help you. However, we can help you know exactly what you qualify for.