For at least forty years, the billable hour’s death has been greatly exaggerated. Time-based billing remains the default at firms of all stripes and sizes. But as artificial intelligence becomes increasingly integral to legal practice, commentators have revived a familiar prognostication: this time, the billable hour surely won’t survive.

Some historical context, as well as a look to the future, below the fold.

Even before the musical Rent asked how you measure a year, lawyers had a ready answer: 87,600 six-minute increments. In 1987, Chief Justice Rehnquist warned about the personal and professional consequences of an economic model predicated on billable hour benchmarks. Rehnquist’s critique emphasized the possibility of ethical compromises due to misaligned incentives, which foreshadowed how later commentators would incorporate technological change into arguments against time-based billing. Moreover, Rehnquist fretted that a focus on simply making one’s hours might diminish lawyers’ commitment to the “public aspect to the profession”—a social cost to weigh against time-based billing’s private benefits.

Then, in 1993, the New York Times saw a “sea change” away from the billable hour, driven by clients, towards “efficiency” and “quality” in legal work. Fixed-fee arrangements had emerged in areas “where the preparation of documents [was] increasingly automated.” And, according to the then-chair of the ABA’s alternative billing task force, “advanced technology” would eviscerate lawyers’ earnings under an hourly model, since fewer “human hours [were] needed to generate legal work.” Among the relevant technologies? Word processing and personal workstations.

The first decade of the millennium saw a second wave of billable-hour anxiety, centered around concerns about technology, human capital, and time-based billing. In a 2002 report, the ABA’s Commission on Billable Hours juxtaposed the “increased costs” of “improved technology” against “fewer hours to bill” due to greater efficiency. This time, “Internet advances” were the principal culprit. Before the end of the decade, various figures in the field had emphatically reprised many of Rehnquist’s themes in urging an end to time-based billing.

By the mid-2010s, the billable hour’s critics had coalesced around Big Data and its progeny, including nascent deployments of AI. The elimination of “grunt work” through these technologies finally might “kill off the billable hour for good.” Central to this third wave were recession-inflected ideas of efficiency in the service of clients; time-based billing, with its inevitably human components, served as a crucial counterpoint.

And yet, the billable hour remains a persistent touchstone of legal services in the United States. The model is durable, in part, because time-based billing allocates risk in ways generally acceptable to lawyers and their clients. As a fourth wave of critique reaches a fever pitch, will the billable hour (or the profession, as currently constructed) survive?

For today’s commentators, lawyers’ judgment, strategy, and problem-solving are the central values—and the principal value center—for the legal profession going forward. In historical context, this intuition isn’t particularly novel, and these values, of course, frequently are embedded in so-called “routine and procedural” tasks. Similarly, a projected AI-driven winnowing of junior associate cohorts echoes concerns from prior eras. The process of law firm de-leveraging “from a pyramid to a cylinder” is nothing new. The disruption created by generative AI may be different in scale and scope than prior decades’ technological revolutions, but the argumentation about lawyers’ time-based billing practices remains largely the same.

What’s mostly missing from current discourse are Rehnquist’s concerns about lawyers’ duties to the legal system and society. Generative AI may enable greater engagement by lawyers in policy work or other public-facing service. Many firms’ economic models, however, may not encourage these activities, and demand-based, firm-level reductions in training and mentoring for junior lawyers may affect the profession’s long-term capacity to serve society—a negative externality. These stakes warrant more emphasis in the current wave of commentary that challenges the billable hour’s primacy at the advent of mainstream generative AI.

But it’s one thing to doom the billable hour to oblivion, and very much another to propose and implement a viable replacement. Change in the billable-hour model isn’t likely to happen overnight. In this context, the real question may be what technological change launches a fifth wave of commentary forecasting the billable hour’s impending demise.

Further reading follows . . .

Rita Gunther McGrath (Columbia, Bus. Sch.), Say Goodbye to the Billable Hour, Thanks to AI, Wall St. J. (Dec. 4, 2025):

The economic absurdity [of time-based billing] becomes clear when we consider that firms adopting AI most successfully would paradoxically see revenue collapse under hourly billing, even as they deliver superior results more efficiently. This misalignment between value creation and revenue generation makes the billable hour’s demise inevitable. . . .

In any case, the premium will be on human insight and connection, not the hours logged.

Sara Merken, David Thomas & Mike Scarcella, Is Big Law’s “Pyramid” Due for an AI Makeover?, Reuters (Dec. 11, 2025):

[A] report [from Citigroup and Hildebrandt Consulting] said firms will likely fatten their senior and mid-level ranks [instead of growing first-year lawyer classes], taking advantage of AI’s ability to automate “repetitive, low value” legal tasks that typically fall to the least experienced attorneys. . . .

“I cannot see how the billable hour revenue model survives the arrival of gen AI,” [said Bruce MacEwen, a law firm consultant at Adam Smith Esq.].

Gary Allen, The Death of The Billable Hour: Why AI May Make Fixed-Fee Legal Billing Inevitable, Forbes (Dec. 10, 2025):

[F]ixed-fee firms can be more profitable than their hourly billing counterparts. By leveraging AI effectively and continuously improving processes, these firms can increase margins while actually lowering prices for clients. It’s not a zero-sum game—it’s a chance to grow the pie for everyone.

The death of the billable hour isn’t just inevitable; it’s necessary. . . .

Michael Grupp, AI Boosts Legal Productivity Without Toppling Billable Hours, Bloomberg Law (Dec. 3, 2025):

“Despite the widespread and well-funded rise of artificial intelligence and automation in the legal industry, the billable hour remains the most resilient pricing model there is. It works, clients tolerate it, and technology—far from killing it—may actually strengthen it. . . .

[W]hile [AI] technology will change how lawyers work, it won’t change how they charge. The billable hour persists because it solves problems no other pricing model can. . . .