Debt-to-Income Ratio helps you calculate DTI ratio without a spreadsheet. Type Monthly Income and Monthly Debts into Debt-to-Income Ratio; each keystroke re-runs the math. Nothing in Debt-to-Income Ratio is a black box. Debt-to-Income Ratio suits budgeting and planning checks. Debt-to-Income Ratio is privacy-first: Finance inputs stay offline. Debt-to-Income Ratio handles debt to income the same way as free online debt-to-income ratio calculator — one of the Finance tools on CalcProMaster. The labels in Debt-to-Income Ratio match the terms in its result. No sign-up or email — Debt-to-Income Ratio answers as you type.
What the defaults give
$1,500 of monthly debt payments against $5,000 of income is a 30% debt-to-income ratio, rated healthy.
At $2,500 of income the identical payment becomes 60% and the rating flips to high risk — the payment did not change, only the denominator.
The formula
DTI = monthly debt payments ÷ gross monthly income × 100
Gross income, before tax. Using take-home pay inflates the ratio by 20–30% and makes a comfortable position look alarming. Debt payments mean the minimum required each month — mortgage or rent, car loans, student loans, credit card minimums, personal loans — not the balance owed.
Worked examples
$5,000 income, $1,500 debt → 30%, healthy
$2,500 income, $1,500 debt → 60%, high risk
$10,000 income, $1,500 debt → 15%, healthy
$5,000 income, $750 debt → 15%, healthy
$5,000 income, $3,000 debt → 60%, high risk
Doubling income halves the ratio and halving the debt does the same, so the two levers are symmetric. In practice income is harder to move and debt is the one under your control — which is why the ratio is usually attacked from the bottom.
What lenders actually do with it
US mortgage lenders work with two versions. Front-end DTI counts only housing costs and is typically capped around 28%. Back-end DTI counts everything and generally needs to be at or below 36% for a conventional loan, with 43% as the usual ceiling for a qualified mortgage. Above that, approval depends on compensating factors: reserves, a long employment history, a large down payment.
The ratio this page reports is the back-end version, and it lumps rent in with debts if you enter it. That is the conservative reading and the one a lender will use.
What it does not tell you
DTI says nothing about the size of the balances or the interest rates on them. Someone at 30% with a 25-year mortgage at 3% is in a very different position from someone at 30% with credit card minimums at 24%. Nor does it know about assets: a household with a year of expenses saved can carry a higher ratio than one living paycheque to paycheque.
Treat 36% as a ceiling rather than a target. Below 20% leaves room for a rate rise or a period out of work; between 36% and 43% is where lenders start asking questions; above 43% the options narrow sharply, whatever the underlying assets look like.
Frequently Asked Questions
What is a good debt-to-income ratio?
Under 36% is generally considered healthy for a mortgage application, with below 20% giving real breathing room.
Is DTI based on gross or net income?
Gross, before tax. Using take-home pay overstates the ratio and understates your capacity.
Does rent count as debt?
For a mortgage application, yes — housing cost goes in the back-end ratio even though it is not a loan payment.
What counts as a debt payment?
The required monthly amount: mortgage, car loan, student loan, card minimums. The outstanding balance does not enter the calculation.
What is the maximum DTI for a mortgage?
Often 43% for a qualified mortgage, with 36% preferred. Above that, approval depends on compensating factors.
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