How much can I borrow

Maximum Mortgage Calculator presents estimates of the mortgage amount you could get at various interest rates calculations employ a formula that is widely used in the mortgage industry, and that is based on your gross income (and your spouse's, if applicable) and your other obligations. This formula says that your maximum monthly PITI payment is the lesser of

(a) 28% of your gross monthly income, or

(b) 36% of your gross monthly income less other monthly obligations (car payments and so forth).