There is no benchmark we can honestly point you to: no Canadian law society publishes a marketing-spend figure, and the percentages circulating online are somebody’s survey rather than a rule. Build the number from your own matter economics — realised fee by matter type, conversion from enquiry to retainer, and what you can afford to pay for one signed file — then adjust for what AI changes, which is the cost of production and not the cost of review.
Key takeaways
Law societies publish conduct rules, not budgets. The Law Society of Ontario tells you what marketing must be — demonstrably true, accurate and verifiable, and neither misleading nor likely to mislead — and says nothing whatever about how much of it to buy. Any percentage-of-revenue figure you find online comes from a private survey with a sample you cannot see, usually of firms unlike yours, often not Canadian. Using it as a target is not budgeting; it is copying somebody else’s homework without the question.
The good news is that a firm has better data than any benchmark could give it: it knows what its own matters are worth and how many enquiries it took to get them.
Five steps, in order. One, realised fee by matter type — not billed, realised, after write-offs. Two, the conversion chain: enquiries, of those how many reach a consultation, of those how many sign. Three, divide: what does one signed matter of each type currently cost you in enquiries? Four, decide what you are willing to pay for one signed matter, expressed as a fraction of its realised fee, and be honest that this fraction differs wildly between a residential purchase and a multi-year commercial file. Five, multiply by how many additional matters of each type you actually have capacity to take.
That last step is the one firms skip, and it is the one that keeps the number sane. A marketing budget sized for matters you cannot staff buys you a reputation for not returning calls.
It moves production cost down sharply. Drafting, repurposing, translating, versioning and scheduling all get cheaper, and the number of assets a small firm can put into the world stops being limited by whether someone had a free Thursday.
It moves review cost up, and that line belongs in the budget explicitly. Review is a licensee’s time, it scales with volume, and it cannot be delegated to the thing that produced the draft. If you plan to publish four times as much, budget four times the review, or plan to publish less.
It does not move measurement at all. Whether a campaign worked is still a question about the source of each enquiry, and firms that have never recorded that field will not learn it from a model.
Some of the marketing budget a business in another sector would spend is simply closed to a law firm, and the restrictions are worth knowing before a proposal arrives. The commentary to the marketing rule treats awards and rankings broadly — including superlative titles such as “best”, “super” and “#1” — and says that awards, rankings and third-party endorsements contravene the rule where they are not the result of a reasonable evaluative process, or are conferred in part as a result of the payment of a fee or other consideration rather than a legitimate evaluation of the lawyer’s performance and quality.
In the same chapter: a practice of referring clients for a fee must be clearly and prominently disclosed in the marketing; marketing must state expressly whether services will be provided by lawyers, paralegals or both; the marketing of second opinion services is prohibited; and a lawyer may not advertise as a specialist without Law Society certification. Any line item that depends on one of those is not a budgeting decision, it is a conduct problem.
Two statutes set out what a mistake can cost, and both apply to a law firm promoting its own services. Under section 20 of Canada’s anti-spam legislation the maximum administrative monetary penalty is $1,000,000 for an individual and $10,000,000 for any other person; our sister firm summarises how CASL penalties and CRTC complaints work in practice.
The Competition Act reaches marketing too, because section 74.01 applies to a person who, for the purpose of promoting any business interest, makes a representation to the public that is false or misleading in a material respect. Where a court finds reviewable conduct, section 74.1 allows an administrative monetary penalty of, for a corporation, the greater of $10,000,000 — $15,000,000 for each subsequent order — and three times the value of the benefit derived, or where that cannot reasonably be determined, three per cent of annual worldwide gross revenues. Our sister firm sets out how the misleading advertising provisions apply to an Ontario business.
On the other side of the ledger, marketing spend is ordinarily a deductible business expense; the practical conditions are covered in this note on deducting advertising and marketing costs. Budget the net cost, not the gross.
Use your own figures; the ones below are placeholders to show the shape. Suppose a firm’s last twelve months show ninety enquiries for one matter type, thirty consultations, twelve signed files, and a realised fee per file the partners agree on. That is seven and a half enquiries per signed file. If the partners decide they can afford to pay up to a tenth of a realised fee to sign one, the budget for that matter type is a tenth of the realised fee times the number of additional files they can actually staff — and not a cent more until the conversion rate improves.
Then the AI line. Producing the content to raise enquiries from ninety to a hundred and twenty costs far less than it used to. Reviewing it costs a partner an hour a week, every week, and that hour has an opportunity cost measured in billable time. Put both in the budget. Firms that only put in the first one discover the second in the form of a partner who has stopped reviewing.
Is a percentage-of-revenue rule ever useful?
As a sanity check against your own history, yes. As a target imported from someone else’s survey, no. If this year’s number is triple last year’s, that is worth explaining; that is the entire value of the ratio.
Should AI tools come out of the marketing budget?
Put the subscription wherever you like, but put the review time in the marketing budget, because that is where it is consumed and that is the cost that limits how much you can publish.
What is the first thing to fix?
Recording the source of every enquiry. Without it none of the arithmetic above is available, and no amount of content production will tell you which content worked. The production side — what you can and cannot publish — is covered across our Business & Professional Services hub.
A 30-minute call is enough to tell you whether AI pays for itself here.
