The Timekeeping Reckoning: What AI-Generated Work Product Actually Does to the Six-Minute Increment

The six-minute increment exists because courts and clients needed a defensible unit of accountability. Charge for a tenth of an hour, and you can point to something — a phone call, a paragraph reviewed, a client email answered. That logic is now structurally broken, and most firms are pretending otherwise.

Here is the problem in its sharpest form: an associate opens a matter, loads the deal parameters into a large language model integrated with the firm's document management system, and receives a reasonably competent first-draft acquisition agreement in eleven minutes. That same associate, working from a prior-deal precedent and applying genuine legal judgment, would have spent two and a half to three hours on the same deliverable in 2022. What goes on the timesheet?

This is not a philosophical question about the future of legal services. It is a practical timekeeping problem sitting in the lap of every billing partner in the country right now, and the answers being given internally — at firms that have given answers at all — range from principled to embarrassing.

What the ABA Has Actually Said

ABA Formal Opinion 512, issued in July 2024, addressed generative AI and competence, confidentiality, and supervision. On billing, the Opinion was blunter than some expected: a lawyer may not bill a client for time not actually spent, and may not pass through AI tool costs as disbursements unless the client has been informed and agreed. The Opinion explicitly draws on Model Rule 1.5's requirement that fees be reasonable, noting that "the efficiency created by technology generally inures to the benefit of the client, not the lawyer."

That last clause is doing enormous work. It is essentially a restatement of the principle courts applied to word processors in the 1990s — when typing a brief went from four hours to forty-five minutes, firms could not bill four hours simply because four hours used to be the market rate. Opinion 512 applies the same logic to AI-accelerated drafting, review, and research. The efficiency gain belongs to the client.

What State Bars Are Adding to the Record

The California State Bar's Practical Guidance on AI issued in late 2024 stopped short of a formal opinion but made clear that billing for AI-assisted work at the associate hourly rate, for time the associate did not actually spend, raises Rule 4-200 concerns around unconscionable fees. The Florida Bar's Ethics Hotline, according to practitioners who have called it, is directing lawyers to the "value billing" disclosure framework from its 2023 fee agreement guidance when the AI efficiency gap is substantial.

More directly, the New York City Bar Association's Ethics Opinion 2024-5 addressed AI billing with unusual specificity, stating that where AI tools "materially compress the time required to produce work product, the attorney must either bill for actual time, bill on a value basis with client disclosure, or reduce the hourly charge to reflect the assistance received." That three-part framework is the most useful thing any bar body has published on this question. It names the choice instead of pretending the choice does not exist.

What Sophisticated Clients Are Now Requiring

If bar opinions are the slow-moving regulatory layer, outside counsel guidelines are where the market is actually setting terms. As of early 2026, a meaningful subset of Am Law 100 clients — particularly large financial institutions, technology companies, and sophisticated PE-backed portfolio companies — have revised their outside counsel guidelines to require AI billing certification. The language varies, but the substance does not: firms must certify that timekeepers are billing actual time spent, that AI-generated first drafts are disclosed as such, and that the firm is not billing for AI tool costs that have not been separately agreed to.

Goldman Sachs, JPMorgan, and several major insurers have circulated guidelines requiring that any matter where AI tools contributed to work product include a notation in the invoice. Some clients are going further, requiring firms to submit to periodic audits of timekeeping records in AI-intensive matters. This is not aspirational. These provisions are showing up in engagement letters being signed today.

The Granular Problem No One Wants to Discuss

Return to the eleven-minute contract draft. The honest timekeeping answer is that the associate spent eleven minutes on initial AI-assisted generation, then — and this is essential — some additional period reviewing, correcting, and applying legal judgment to the output. That review time is real, billable, and in complex transactions often substantial. The error in both directions is to pretend the total time was three hours (theft) or to pretend the review time was zero (malpractice waiting to happen, because unreviewed AI output is not competent work product).

The actual defensible entry looks something like: 0.4 hours — AI-assisted initial draft, attorney review and revision of acquisition agreement, Section 3 representations. That is honest. It reflects real time. It invites the client to understand what they are receiving. Some clients will ask follow-up questions. Good. Those conversations are overdue.

What Firms Should Actually Do

Firms need written AI billing policies — not aspirational statements, but specific guidance that tells an associate what to put on the timesheet when an AI tool does the first sixty percent of a task. The policy should require billing actual time, require disclosure on invoices when AI materially assisted work product, and prohibit the fiction that AI-compressed work should be billed at pre-AI time estimates simply because that was the old baseline.

Billing partners should audit a sample of AI-assisted matters quarterly for the next two years. Not because associates are dishonest, but because the habits of the billable hour are thirty years old and the instinct to round up to the nearest reasonable-looking increment is deeply ingrained.

The six-minute increment is not going away. But what it measures — actual professional time applied to a client's problem — cannot be a fiction. The bar ethics framework already prohibits that fiction. The clients are already contracting around it. The firms that acknowledge this clearly, build honest policies, and train their timekeepers accordingly will be the ones whose billing practices survive scrutiny. The ones that do not are accumulating liability one rounded-up tenth of an hour at a time.