EBITDA Margin refers to eBITDA divided by operating revenue or net sales. It shows operating profitability and cost efficiency before interest, tax, depreciation, and amortisation. In MSME underwriting, it is read as part of the financial assessment and is usually compared across periods, peers, banking conduct and management explanations. For example, a rising margin can show pricing power, while a sudden fall may point to cost pressure, discounting or weak operating control. It matters because the number can influence eligibility, limit sizing, repayment comfort, leverage view and early-warning assessment. The common mistake is to use it mechanically; seasonality, accounting treatment, one-off items and data mismatches can change the credit interpretation.