Housing Ratio: Up To 35% Total DTI: Up To 45% Maximum front-end ratio is 35% (total housing payment plus homeowner’s association fees, if any, divided by gross monthly income cannot exceed 35%). Maximum back-end ratio is 45% (total housing payment, plus homeowner’s association fees, if any, AND other recurring debts such as credit card payments, car payments, student loans, etc. divided by gross monthly income cannot exceed 45%). There are NO exceptions to these maximum debt-to-income ratios. We use the income of all occupying household members to calculate the debt-to-income ratio. Another debt-to-income consideration is that the property taxes are based on the current year’s (most recent) tax bill, regardless of the property status.