Under 36% is generally healthy, and many mortgage lenders cap the total ratio around 43%.

Does rent count in DTI?

Lenders usually include housing costs, including rent, in the total (back-end) ratio — but check how a specific lender treats it.

Is DTI the same as credit utilization?

No. DTI compares monthly debt payments to income; credit utilization compares your card balances to your credit limits.

What Is the Debt-to-Income Ratio?

Published 9/18/2025 · 2 min read · Finance calculators

Camille Laurent — Finance writer at Allin

Tax · Personal finance

Checked against 2 sources

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In short

Your debt-to-income ratio (DTI) is your total monthly debt payments divided by your gross monthly income, as a percentage. Pay $1,500 in debts on $5,000 of income and your DTI is 30%. Lenders use it to judge how much more you can borrow; under 36% is generally seen as healthy, and mortgage lenders often want it below 43%.

Your debt-to-income ratio compares your monthly debt payments to your income. Here's how to calculate it, why lenders use it, and how to improve it.

How it's calculated

Add up your fixed monthly debt payments — loan and card minimums, car finance, and housing costs the way your lender counts them — then divide by your gross (before-tax) monthly income and multiply by 100. With $1,500 of payments on $5,000 of income, that is 1,500 ÷ 5,000 × 100 = 30%. Use monthly figures throughout so the ratio is consistent.

Front-end vs back-end DTI

Lenders often split DTI in two. The front-end ratio counts only housing costs — mortgage or rent, plus property tax and insurance where relevant. The back-end ratio adds every other debt: cards, car and personal loans. Mortgage underwriters look at both, and it is the back-end figure that most people mean when they say 'DTI'.

Why lenders care

DTI is a quick read on how stretched your budget already is, and therefore how safely you could take on more. A lower ratio leaves room to absorb a new payment and life's surprises; a high one signals risk. As a rough guide, under 36% is comfortable, and many mortgage lenders draw a line around 43% for the total ratio.

How to improve it

Two levers move DTI: lower the debt payments or raise the income. Paying off a small loan or card removes its whole payment from the top of the fraction, which often helps more than chipping at a large balance. Avoid taking on new debt just before applying for a mortgage, and remember a raise or side income lowers the ratio from the other side.

Worked with our own calculator

Debt-to-income ratio calculator

Given

Monthly net income: $6,000.00
Monthly debt payments: $1,800.00

Result

Debt-to-income ratio: 30%
Room left at 35%: $300.00

These figures are produced by the calculator below, not typed in by hand — they are recomputed whenever the tool changes.

Run it on your own figures →

Frequently asked questions

What is a good DTI?: Under 36% is generally healthy, and many mortgage lenders cap the total ratio around 43%.
Does rent count in DTI?: Lenders usually include housing costs, including rent, in the total (back-end) ratio — but check how a specific lender treats it.
Is DTI the same as credit utilization?: No. DTI compares monthly debt payments to income; credit utilization compares your card balances to your credit limits.

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Sources

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