Debt to Income Ratio for a Mortgage: What It Is and How to Lower It

When a lender looks at your file, one number comes up in nearly every conversation: your debt to income ratio for a mortgage. People hear "DTI" and assume it is a score they pass or fail. It is closer to a simple question. After your bills are paid, how much room is left in your paycheck for a house payment? In this guide I'll show you how the math works, what counts as a debt, what doesn't, and how to improve the number before you apply.

The CFPB defines it plainly: your debt-to-income ratio is all your monthly debt payments divided by your gross monthly income. "Gross" means before taxes and other deductions come out. The result is a percentage, and lenders use it to judge whether you can comfortably manage the loan you are asking for.

You will hear two versions:

What is a good debt-to-income ratio for a mortgage?

There is no one number. Limits differ by loan program and lender, and a lower ratio generally gives you more choices. I'll look at your actual file and tell you which programs fit.

Do utilities and groceries count in DTI?

No. They are not on the list of monthly obligations lenders count, such as loans, credit cards, support payments and the new housing payment. They still belong in your own budget.

Is DTI calculated before or after taxes?

Before. The CFPB says DTI uses gross monthly income, which is your pay before taxes and deductions.

Does paying off a credit card before applying help?

It can, because removing that payment from your monthly debts lowers the ratio. Talk to me first about timing, so you do not drain the cash you need for closing.