The typical bank limit on monthly mortgage payments is about 28 percent of your gross monthly income. Therefore, the bank thinks you can devote up to 28 percent of your household income to your mortgage payment and expenses (including taxes, insurance and association dues). Banks will also typically allow a total debt-to-income ratio of up to around 36 percent. This means that your mortgage, credit card payments, student loan payments and car payments shouldn’t exceed 36 percent of your total monthly income.