AI Threatens Traditional Leverage Model in Big Law
Large law firms rely on a tiered leverage model to maximize profits, but the rise of AI may eliminate the entry-level roles driving the system.
Modern large law firms operate on a business model known as leverage, a pyramid structure formalized in the early 20th century by Paul Cravath. In this system, a small group of partners secure clients and supervise a large pool of associates who execute the majority of billable work.
Kirkland & Ellis exemplifies the high-leverage approach, generating a record $10.56 billion in revenue in 2025. The firm utilizes approximately 600 equity partners to oversee between 3,000 and 3,500 associates and non-equity partners. In contrast, Wachtell, Lipton, Rosen & Katz employs a low-leverage model, maintaining a smaller associate-to-partner ratio and focusing on strategic work performed directly by partners.
Both strategies yield significant profits. Wachtell Lipton partners earned over $12 million each in 2025, exceeding the $11 million earned per equity partner at Kirkland & Ellis. However, the industry faces a structural shift as artificial intelligence threatens to eviscerate the entry-level associate roles that sustain the leverage model.
