Understanding the Debt-to-Income Ratio
Nov 14th 2011alexLoan Process
Most of the factors that go into the underwriting approval process of a mortgage application are fairly straightforward—a first-time homebuyer can understand the basics of what is being assessed in their debt, income, and credit history. The debt-to-income ratio, however, is a unique instrument of the mortgage lender, and might not be as clear on the surface.
Underwriters review two different values to determine the debt-to-income ratio: a front-end percentage and a back-end percentage. The front-end refers to the amount of a prospective homebuyer’s income that goes towards their current housing costs (rent, current mortgage payments, condo assessments, and property insurance/taxes). The back-end refers to all debt payments for which the borrower is currently responsible, including the front-end percentage. These two percentages together create the borrower’s debt-to-income ratio, expressed as (front-end percentage) / (back-end percentage). By multiplying the borrower’s monthly income by each side of this ratio, the lender can determine what they can afford in a mortgage.
This ratio compared to the standard debt-to-income ratio. In the United States, the standard conforming loan ratio is 28/36 (signifying that the borrower should currently have 28% of their monthly income available for housing expenses and 36% for housing expense plus all other debt). For FHA-approved loans the ratio is 31/43, rural properties purchased with USDA loans are calculated with a debt-to-income ratio of 29/41, and Veterans Affairs loans are assessed on a single standard of 41 (meaning that the borrower must simply have 41% of their monthly income allowed towards all debt).
Although this ratio is a significant part of any mortgage application review, as with any application, the underwriter will be looking at the borrower’s entire financial situation. The general strategy for any hopeful borrower should be to reduce debt obligations and maintain a history of financial responsibility.


