The Altman Z-Score is a formula developed by NYU professor Edward Altman in 1968 that predicts the probability of a company entering bankruptcy within two years. It combines five financial ratios — each measuring a different dimension of financial health — into a single weighted score. Despite being over 50 years old, the Z-Score remains one of the most widely used and empirically validated measures of corporate financial distress.
The five components measure liquidity (working capital to total assets), cumulative profitability (retained earnings to total assets), operating efficiency (EBIT to total assets), market confidence (market value of equity to total liabilities), and asset productivity (revenue to total assets). Each component is weighted and summed to produce the final score.
A Z-Score above 2.99 places the company in the "safe zone" — historically, companies with scores above this threshold have a very low probability of bankruptcy. A score between 1.81 and 2.99 is the "gray zone," where the outcome is uncertain. A score below 1.81 is the "distress zone," where the probability of financial distress is elevated.
The original model was designed for publicly traded manufacturing companies. It is less reliable for financial institutions, utilities, and early-stage companies with minimal retained earnings. Despite these limitations, it remains a useful first-pass screening tool for identifying companies under financial stress.