Is AI-Assisted Time Tracking Actually Billable? What NJ Attorneys Need to Know About RPC 1.5

There is a question sitting quietly underneath every AI efficiency win a New Jersey attorney has celebrated this year: If the task took eight minutes instead of two hours, what exactly do I put on the invoice?

Most NJ solo practitioners who have adopted AI drafting or research tools have grappled with this in some form — usually alone, at 9 p.m., cursor blinking in their billing software. The conversation inside the profession hasn't caught up to the reality on the ground. And that gap is where RPC 1.5 starts to matter.

What RPC 1.5 Actually Requires

New Jersey's RPC 1.5(a) prohibits fees that are "clearly excessive." The rule sets out eight factors courts and disciplinary panels use to evaluate reasonableness — including the time and labor required, the skill demanded, the results obtained, and the customary fee in the locality.

Notice what the rule doesn't say: it doesn't say attorneys must bill by the hour, and it doesn't say efficiency is penalized. What it does require is that the fee bear a rational, defensible relationship to the value delivered and the work performed. That standard existed before AI. AI just makes the math harder to explain.

The Three Billing Scenarios NJ Attorneys Are Actually Facing

Scenario 1: You used AI to do something that used to take two hours in 20 minutes. This is the most common case. A motion for summary judgment that once required three hours of legal argument drafting now takes 45 minutes with an AI-assisted first draft you heavily edited and verified. Are you billing three hours, 45 minutes, or something in between?

Under RPC 1.5, billing the full three hours when you genuinely spent 45 minutes — and when your retainer agreement doesn't address AI — is ethically risky. The "time and labor required" factor points toward actual time. Courts have sanctioned attorneys for padding bills; AI-inflated time is padding by another name.

Scenario 2: You used AI for a task your client didn't know you were delegating. If your engagement letter promises personal attorney attention to research, and you're instead running queries through a legal AI platform, you may have a communication problem under RPC 1.4 and a fee problem under RPC 1.5. Clients increasingly have standing to challenge fees for work they didn't authorize to be done by machine.

Scenario 3: You're billing a flat fee and AI made you dramatically more profitable. Here, the ethics concern largely disappears — flat fees exist precisely to allocate efficiency gains to the attorney. But a new risk emerges: if AI also reduces the quality of your output (through hallucinations you didn't catch, or shallow analysis you didn't verify), and you charged a premium flat fee, you may face a fee dispute grounded in the work product itself.

The NJ-Specific Wrinkle: Fee Arbitration

New Jersey has a robust fee arbitration system administered through the District Fee Arbitration Committees. Unlike some jurisdictions where clients must file a malpractice suit to recover on a disputed bill, NJ clients can challenge attorney fees through a streamlined arbitration process — and they do.

What this means practically: if a client suspects they were billed full-rate attorney time for work an AI tool performed in minutes, they have a low-friction way to challenge it. You don't need a formal disciplinary complaint for this to become painful. A fee arbitration finding against you is a matter of record.

A Practical Billing Framework for AI-Assisted Work

Rather than billing in the dark, consider adopting a three-part approach:

1. Track actual time, always. Use a timer even for AI-assisted tasks. Know what you actually spent. This is your ethical floor for hourly billing, not your ceiling.

2. Apply a value adjustment, explicitly. RPC 1.5 permits billing above the raw time spent when the skill, result, or complexity justifies it. If your 40-minute AI-assisted brief required significant legal judgment, issue-spotting, and editing — that expertise has value. Document it in your time entry narrative. "Drafted motion for summary judgment using AI drafting tool; attorney reviewed, restructured arguments, verified all citations, and revised for client-specific context. Total attorney time: 1.2 hours." That's defensible.

3. Update your retainer agreement. Add a clear paragraph disclosing that the firm may use AI-assisted tools in delivering legal services, that such use does not reduce the quality of attorney supervision, and that fees reflect attorney judgment and oversight — not raw task duration. This isn't just ethics protection; it's good client communication.

The Uncomfortable Efficiency Question

Here's the honest tension: AI tools are being marketed to law firms partly on the promise of doing more work in less time. But the billing model most NJ solo attorneys still use — hourly rates — creates a structural disincentive to being efficient. Firms that bill hourly and adopt AI without rethinking their pricing model may quietly underbill themselves into a cash flow problem.

The smarter path is to use AI's efficiency gains to take on more clients or more complex matters, not simply to compress the same revenue into fewer hours. That's a practice economics conversation, and it starts with being honest about what your current billing model actually rewards.

RPC 1.5 doesn't tell you how to price your services. But it does require that however you price them, you can justify it. In the AI era, justification requires intention — not just a running timer.