The formula
DTI (%) = total monthly debt payments ÷ gross monthly income × 100. "Total monthly debt payments" includes all recurring debt obligations — loan EMIs, credit card minimum payments, and similar recurring debt commitments — not everyday living expenses like groceries or utilities, which aren't debt. "Gross monthly income" means income before tax and other deductions, not take-home pay.
The three commonly cited bands
DTI of 36% or below is generally considered healthy — a comfortable margin between debt obligations and income. DTI of 36-43% is considered manageable but worth monitoring — debt payments are consuming a meaningfully large share of income, leaving less room for savings or unexpected expenses. DTI above 43% is generally considered high risk — lenders commonly use this threshold as a cutoff or a signal for closer scrutiny on new loan applications, since it suggests limited remaining capacity to take on additional debt safely.
A worked example across three scenarios
A household with ₹60,000 monthly gross income and ₹15,000 in total monthly debt payments has a DTI of 25% — Healthy. The same income with ₹24,000 in debt payments has a DTI of 40% — Manageable. The same income again with ₹30,000 in debt payments has a DTI of 50% — High risk. Identical income, three genuinely different risk categories, purely from how much of that income debt payments already consume.
Why lenders care about this specific ratio
DTI is one of the most commonly used metrics lenders check before approving a new loan or credit line, since it directly estimates how much of your income is already committed and how much genuine capacity remains for a new payment obligation — a high existing DTI signals meaningfully higher risk of missed payments if a new loan is added on top, independent of your credit history or any other individual factor.
Why this matters for your own financial planning too
Beyond loan approval odds, DTI is a useful personal check on how much financial flexibility you actually have — a high DTI leaves little room to absorb an income disruption (job loss, reduced hours, an unexpected large expense) without falling behind on debt obligations. Tracking your own DTI over time, and treating a rising trend as a signal to slow new borrowing or accelerate paying down existing debt, is a practical use of this metric independent of whether you're actively applying for new credit.