Debt-to-income ratio, explained

Q: What counts as a good debt-to-income ratio?

Lower is better, and many lenders view a back-end DTI at or below 36 percent favorably. Some loan programs allow higher ratios, and a common upper reference point is 43 percent, above which some lenders become more cautious. The exact threshold depends on the loan type and lender, so treat these figures as general guideposts rather than hard cutoffs.

Q: What is the difference between front-end and back-end DTI?

Front-end DTI counts only your housing costs, such as your mortgage or rent, taxes and insurance, as a share of your gross monthly income. Back-end DTI counts all your monthly debt payments, including housing plus car loans, student loans, credit card minimums and similar obligations. Lenders usually pay more attention to the back-end figure because it reflects your total debt load.

Q: Does my DTI use gross or net income?

DTI is almost always calculated using gross monthly income, meaning your income before taxes and deductions. Using gross income is the standard convention lenders follow, so when you estimate your own ratio, use your pre-tax income to match how a lender would see it.

What DTI measures

Your debt-to-income ratio, or DTI, is a simple comparison: your total monthly debt payments divided by your gross monthly income, expressed as a percentage. If you pay $2,000 a month toward debts and earn $6,000 a month before taxes, your DTI is about 33 percent.

Two details matter from the start. First, DTI uses gross income — your pay before taxes and deductions — because that is the convention lenders follow. Second, it counts recurring debt payments, not your total balances. A large loan with a small monthly payment affects your DTI less than a smaller loan with a big payment.

Front-end vs back-end DTI

Lenders often look at two versions of the ratio.

Front-end DTI

The front-end ratio counts only your housing costs against your income. For a homeowner that typically means the mortgage principal and interest, property taxes and homeowners insurance. It answers a narrow question: how much of your income is committed just to keeping a roof over your head?

Back-end DTI

The back-end ratio is broader. It adds every other monthly debt obligation to your housing costs — car payments, student loans, minimum credit card payments, personal loans and similar recurring debts. Because it captures your full debt picture, the back-end figure is usually the one lenders weigh most heavily.

The 28/36 rule and the 43 percent guideline

You will often hear these numbers as shorthand for what lenders consider comfortable. They are guidelines, not laws, and the exact thresholds vary by loan type and lender.

The 28/36 rule suggests keeping housing costs at or below 28 percent of gross income (the front-end ratio) and total debt at or below 36 percent (the back-end ratio). Many lenders view applications inside these bounds favorably.
The 43 percent guideline is a commonly cited upper reference point for back-end DTI. Above it, some lenders grow more cautious, though a number of loan programs do allow higher ratios in the right circumstances.

Treat these as guideposts rather than pass-or-fail lines. A borrower with a strong credit history, stable income and healthy savings may be approved above these levels, while a weaker overall profile might face stricter limits.

How to improve your DTI

Because DTI is a ratio, you can improve it from either side — shrink the top number or grow the bottom one.

Pay down debts with high monthly payments. Since DTI counts payments, eliminating a debt removes its payment entirely and can move your ratio noticeably.
Avoid taking on new debt before you apply. A new car loan or financed purchase can raise your DTI at the worst possible moment.
Increase documented income. A raise, additional steady income, or income you can properly document all lower the ratio by raising the denominator.
Be strategic about timing. Paying off a small loan just before applying can have an outsized effect if it removes a large monthly payment.

Small moves can matter here, because you are changing a ratio rather than an absolute number. Clearing one modest debt with a heavy monthly payment can do more for your DTI than paying down a much larger balance that costs little each month.

Frequently asked

What counts as a good debt-to-income ratio?

Lower is better. Many lenders view a back-end DTI at or below 36 percent favorably, and 43 percent is a common upper reference point above which some become more cautious. Exact thresholds depend on the loan and lender, so treat these as guideposts.

What is the difference between front-end and back-end DTI?

Front-end DTI counts only housing costs as a share of gross income. Back-end DTI adds all other monthly debt payments — car loans, student loans, credit card minimums and so on. Lenders usually focus on the back-end figure.

Does my DTI use gross or net income?

Gross income — your pay before taxes and deductions. That is the standard lenders use, so estimate your own ratio the same way.

The fastest way to know your number is to calculate it. Enter your income and monthly debts into the debt-to-income calculator to see both your front-end and back-end DTI instantly.