A law firm counts as Big Law when it combines three things: a headcount of roughly 500 or more attorneys, associate pay set on the Cravath scale, and a spot among the top U.S. firms by revenue or size on the industry’s main rankings. No official body hands out the label. It’s industry shorthand, but the shorthand is remarkably consistent, and what counts as Big Law in practice comes down to those markers rather than any one of them alone.
Size and Revenue
Headcount is the first filter. Firms with fewer than a few hundred lawyers rarely attract the label, and firms with 500 or more almost always do. At the top end, Kirkland & Ellis employs thousands of attorneys across dozens of offices worldwide.
Revenue is the second. The Am Law 100 ranks the 100 highest-grossing U.S. law firms each year, and the firms on that list bring in hundreds of millions to billions annually. Kirkland & Ellis topped the 2025 Am Law 100 at $10.5 billion in gross revenue.1American Lawyer. Kirkland Reaches $10.5B in Revenue, as PEP Up by 20% Average profits per equity partner across the Am Law 100 reached $3.15 million that same year.
The Am Law 200 extends the list to the next 100 firms by revenue, and many of those also sit comfortably under the Big Law umbrella. Firms move between the bottom of the Am Law 100 and the top of the Am Law 200 regularly on modest revenue shifts, so the line between the two tiers is more gradient than wall.
The Rankings That Settle the Question
Three rankings dominate the conversation, and each measures something different.
The Am Law 100 and 200 sort firms by gross revenue. The list also tracks revenue per lawyer and profits per equity partner, which separate efficient, highly profitable firms from those that are only large. This is the ranking most people have in mind when they talk about Big Law’s financial tier.
The NLJ 500, published by the National Law Journal, ranks the 500 largest U.S. firms by headcount rather than revenue. A firm can have a large attorney count without generating Am Law 100 revenue, so this list captures a broader slice of the profession.2National Law Journal. NLJ 500 2025 – Ranking the 500 Top American Law Firms
The Vault 100 measures prestige. More than 20,000 associates rate the reputations of firms other than their own, which makes it a peer-assessment survey rather than a revenue table. A firm can rank highly on the Vault 100 without being the largest or most profitable, though there’s heavy overlap at the top.3Vault. Top Law Firm Rankings – Vault Law 100
Firms that appear on all three lists are unambiguously Big Law. Firms that appear on one but not the others occupy a gray zone where the label gets debated. The most common working test among legal recruiters and law students is simpler: Am Law 200 membership plus Cravath-scale pay.
Cravath-Scale Pay
Big Law compensation follows a uniform structure called the Cravath scale, named for Cravath, Swaine & Moore, the firm that historically sets the benchmark other major firms match. Under this system, associate salaries rise in lockstep with seniority rather than individual performance. Every first-year associate at a Cravath-scale firm earns the same base salary, every second-year earns the same, and so on down the line.
The current scale starts at $225,000 for a first-year associate and climbs to $435,000 by the eighth year:
- First year: $225,000
- Second year: $235,000
- Third year: $260,000
- Fourth year: $310,000
- Fifth year: $365,000
- Sixth year: $390,000
- Seventh year: $420,000
- Eighth year: $435,000
Bonuses sit on top of base salary and typically arrive in multiple tranches during the year. A first-year associate at a top firm can expect roughly $25,000 to $35,000 in combined annual bonuses, while senior associates in their seventh or eighth year may receive $140,000 or more. Total compensation for an eighth-year associate at a Cravath-scale firm exceeds $575,000.4Ropes & Gray. Associate Salary Disclosures
Not every Big Law firm pays the full Cravath rate. Firms further down the Am Law 100 and into the Am Law 200 often set first-year salaries closer to $200,000, with total compensation that trails Cravath-scale firms by a meaningful margin at every level. The gap widens with seniority: by the eighth year, associates at these firms may earn closer to $300,000 in base pay compared with $435,000 at the highest payers. Firms that pay full Cravath are generally treated as Big Law without further argument; firms that pay close to it and sit on the Am Law list usually are too.
The Work and the Clients
Big Law firms concentrate on work that demands large teams, deep specialization, and the ability to staff matters around the clock when deadlines hit. The core practice areas include mergers and acquisitions, capital markets, structured finance, complex commercial litigation, intellectual property, regulatory compliance, and cross-border transactions. A single M&A deal might require dozens of attorneys across corporate, tax, antitrust, employment, and real estate groups working in parallel. Only a large firm can staff that kind of matter.
The client roster reflects the work. Big Law serves Fortune 500 companies, multinational corporations, major financial institutions, private equity funds, and sovereign entities. These clients choose Big Law because their legal problems cut across multiple jurisdictions and practice areas at once. A mid-sized company with a routine contract dispute doesn’t need Big Law. A multinational navigating a hostile takeover across three continents does.
What clients pay premium rates for, in the end, is capacity. Big Law firms invest heavily in technology platforms, research databases, dedicated support staff, and global office networks, and that capacity is really the product on offer. When a client needs 40 lawyers to close a deal by Friday, size is the whole point.
What Doesn’t Count as Big Law
The term doesn’t stretch to cover every firm that happens to be large or sophisticated. Mid-sized firms, running roughly 50 to 250 attorneys, handle sophisticated work for regional businesses, private companies, and wealthy individuals. They can match Big Law quality in specific practice areas but lack the bench depth for enormous, multi-jurisdictional matters. Compensation runs lower, though the gap narrows outside the most expensive legal markets.
Boutique firms specialize in a single practice area or a small cluster of related ones. An antitrust boutique or a patent litigation shop may have only 20 or 30 attorneys and still handle work as complex as anything at a full-service firm. Boutiques compete on depth of expertise rather than breadth of services, and their attorneys often left Big Law to focus on one area without cross-selling pressure. Sophisticated, well-paid, often prestigious, but not Big Law in the industry sense of the word.
The practical test holds up well against these edge cases. If a firm shows up on the Am Law 100 or 200, pays at or near the Cravath scale, and carries the headcount to staff large multi-practice matters, it counts. If it misses on size and revenue even when the work is first-rate, the label doesn’t apply, whatever the firm’s reputation in its niche.