Mortgages & Financing
What is debt-to-income ratio and why does it matter?
By Steve Lockhart
The short answer
Debt-to-income ratio, DTI, is your monthly debt payments divided by your gross monthly income, shown as a percentage. The debts are the fixed ones: auto loans, credit card minimums, student loans, and other obligations.
Full answer
Debt-to-income ratio, DTI, is your monthly debt payments divided by your gross monthly income, shown as a percentage. The debts are the fixed ones: auto loans, credit card minimums, student loans, and other obligations. The income is the gross number before taxes. Lenders lean hard on this ratio because it predicts whether a payment stays comfortable when life happens, and it is one of the main drivers of the amount you can borrow. Common program targets run around 43 percent for total debt and about 28 percent for housing, with room built in for other programs. The encouraging part: DTI is the number you can move. Pay down a card, retire a loan early, or delay the new car, and the ratio improves before the approval letter matters. If your DTI sits too high today, that is usually a plan with a specific target and a few months of work, not a dead end. We run the number before the lender does, and fix it while we still can.
Go a little deeper
Frequently asked
Questions people often follow up on
What counts as a monthly debt for DTI?
Recurring loan payments: auto, student, personal, and other fixed obligations, plus minimum credit card payments. Everyday bills like utilities, insurance, and groceries do not count. The lender applies a specific formula to each line, so an early conversation gives you the exact figure instead of a guess.
How quickly can my DTI change?
As fast as you change a balance. Pay off or pay down one big monthly obligation and the ratio closes immediately. Many buyers spend two or three months shaping debts before they start the search, because every dollar cut from the ratio expands the mortgage that fits.
Is a slightly high DTI always a no?
Not always. Some programs allow extra points with strong credit and reserve, and manual underwriting exists for solid stories. If you are close, a smaller purchase, a gift, or paying down one debt can bring the ratio in range. A tiny overage is a fixable target, not a closed door.
The Lockhart Method
The Lockhart Method
Your Home | My Strategy | Proven Results
My strategy: run the DTI before the lender does, and if it is the constraint, fix it in the month before the file lands. The ratio is the one number about you, not the market, that we can improve, and a better DTI changes the whole price range.
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