The debt-to-income (DTI) ratio equals your total fixed monthly debts divided by your total monthly gross income.
DTI is essential for mortgage lenders to determine the applicant's financial capacity of paying off the borrowed money in time. Several studies suggest that borrowers with a high DTI ratio are likely to struggle more in making the monthly installments. In this case, the breakeven point is 43, which means this is the highest ratio that a lender will still approve for a mortgage. However, some lenders may consider up to 50% DTI too.
All mortgage lenders check the front-end and back-end ratios to determine the DTI. The front-end ratio covers the house-related debts, including home loans, homeowners' insurance, property taxes, and other expenses. On the other hand, the back-end ratio mostly includes the bills and debts on your credit cards.
The ideal front-end and back-end ratios should be lower than 28% and 36%, respectively. However, a loan approval does not solely depend on this ratio. Mortgage lenders will also take your credit score, percentage of down payment, assets, and a few other things into consideration. If these figures turn out well, you can get a loan with a slightly higher DTI.
Regular household expenses will not be considered as debts. Some other big expenses that will be exempted are healthcare costs, child support, and insurance premiums.