A client accepts a fee when the bill tells them what was done, why it was needed and how it relates to what they were told at the start. AI is good at turning raw time entries into that story; it cannot supply the disclosure that should have happened before the work began.
Key takeaways
Almost every disputed account has the same shape. The amount is larger than the client expected, the description is shorter than the amount, and the first the client heard of the overrun was the invoice. None of those is a writing problem, and the third one is not fixable at the drafting stage at all.
The professional rules anticipate this. The commentary to rule 3.6-1 of the Rules of Professional Conduct says a lawyer should provide the client in writing, before or within a reasonable time after commencing a representation, as much information about fees, disbursements and interest as is reasonable and practical, including the basis on which fees will be determined — and that when something unusual or unforeseen occurs that may substantially affect the amount, the lawyer should raise it.
The commentary also says a lawyer should be ready to explain the basis of the fees and disbursements charged, which it notes is particularly important for charges the client might not reasonably be expected to anticipate. A fee narrative is where that readiness becomes a document.
In Ontario, rule 3.6-3 requires that in a statement of account delivered to a client, a lawyer shall clearly and separately detail the amounts charged as fees and as disbursements. That is a structural requirement about the bill, and it is the one most often blurred by a single line reading "professional services and disbursements". The practical difference between the two categories is set out in this explanation of fees versus disbursements in Ontario litigation.
British Columbia’s Code of Professional Conduct rule 3.6-1 requires a fee or disbursement, including interest, to be fair and reasonable and disclosed in a timely fashion, and lists the same fairness factors: the time and effort spent, the difficulty and importance of the matter, the results obtained, the lawyer’s experience, any estimate or range given, and the client’s prior consent to the fee.
In Quebec the choice of pricing model is the professional’s: the Barreau du Québec states plainly that it publishes no directive on which fee model to adopt, subject to the Code of ethics of advocates, and offers a model mandate-and-fee agreement to encourage firms to record the terms, conditions and scope of the mandate with the client.
An accounting or advisory practice is not bound by a law society, but the same logic applies through the engagement letter. The engagement type — audit, review or compilation, in the Auditing and Assurance Standards Board’s framework — sets the scope, and the narrative should describe work that falls inside it.
Anchor to the engagement. Open with the scope the client agreed to, in the words of the engagement letter. A bill that starts from your docket rather than their instructions reads as self-referential.
Group by outcome, not by day. Clients do not read chronologies. Three or four headings that name what was achieved — the response filed, the negotiation concluded, the return prepared — carry far more than fifty dated lines.
Name the specifics. Documents, counterparties, deadlines. Specificity is what makes an amount feel earned, and it is what a reviewer looks for if the account is ever assessed.
Explain the surprises in the narrative, not the covering email. If a matter went past an estimate, the reason belongs on the bill.
Separate fees and disbursements visibly. Both because the rule requires it and because clients treat a filing fee and an hour of your time very differently.
Turning fifty time entries into four paragraphs is a summarisation task, and it is one of the things language models genuinely do well. Given the engagement letter, the entries and your house style, a model will produce a first draft in the right shape faster than a partner will, and it will do it in the same shape every month, which is itself worth something.
It is also good at consistency checks: flagging entries whose description does not match the scope, spotting a disbursement with no supporting record, noticing that the total has passed an estimate you gave. Those are exactly the moments the conduct rules say should trigger a conversation.
What it cannot do is know what you told the client on the phone in March. Feed it the record; do not expect it to reconstruct a conversation that was never written down.
And it must not be allowed to write persuasively past the facts. A narrative that sounds better than the work is a misrepresentation, and the fact that a model produced the sentence does not move responsibility off the person who sent it.
The amounts below are invented to make the shape visible. Suppose a corporate matter is billed at $14,200 against an initial range of $9,000 to $11,000. The first draft narrative runs to eleven lines of docket-speak and the client queries it within a day.
The rewritten version has four headings: the share purchase agreement and two rounds of amendments, the unexpected minority shareholder consent, the closing mechanics, and post-closing filings. The consent issue — which did not exist when the estimate was given — gets its own paragraph explaining what it was, why it had to be resolved and roughly what proportion of the overrun it accounts for. Disbursements are listed separately, each with a payee.
The account was not reduced. It was accepted, because the client could see where the money went and why nobody could have quoted for it in January. Where an account is genuinely disproportionate to the value at stake, the break-even arithmetic on legal fees is a more honest conversation than a better-written bill.
Should the narrative go out without review?
No. It is a representation to the client about what you did, and rule 3.6-1 makes the fee the lawyer’s responsibility regardless of who typed the description.
How long should a narrative be?
Long enough that each grouped activity names something specific. On a large account that is usually three to six paragraphs; on a small one, three sentences.
Does this apply to fixed-fee work?
Yes, and arguably more. On a fixed fee the client cannot infer effort from hours, so the narrative is the only place the work becomes visible.
A 30-minute call is enough to tell you whether AI pays for itself here.
