Personal Injury Lawyer Advertising: What a Signed Case Costs

Personal injury lawyer advertising pays off when a source's cost per signed retainer stays below the slice of the expected fee you're prepared to spend winning a case. Both figures come out of your own records, never the ad report, so the work is following each source from first call to collected fee.

Quick answer

Take one finished month and divide each source's spend by the retainers it signed. That's its cost per signed case. Set it against your ceiling: the expected fee per signed case times the share of it you're willing to spend to sign one. Every paid channel gets its own phone number, and intake picks each caller's source from a fixed list. Judge channels by signed retainers rather than leads or consultations, and have any ad that mentions results or quotes a client checked against your state bar's rules.

What does a click on an accident search cost?

Google's Keyword Planner estimates how often a term is searched and what its clicks cost. It shows an average cost per click (CPC) and a top-of-page bid range whose low end sits near the 20th percentile of top-of-page bids advertisers have paid in the past, and whose high end sits close to the 80th (Google, checked 2026-10-04).

These are US-wide estimates Google Ads Keyword Planner produced in October 2026; your firm won't pay exactly these prices, and local ones differ. Even so, 100 clicks on "car accident lawyer near me" at the planner's average come to $21,899 before a single person calls.

What is one signed case worth to your firm?

On contingency, no recovery means no fee, which makes a signed case a bet rather than revenue. Start with every case the firm closed in the last two years, counting the ones dropped, referred out or lost. Take the fees collected, subtract case costs the firm advanced and never got back, and divide by the number of cases. The result is your expected fee per signed case; work it out by case type if your records allow.

Next, decide what share of that fee you'll spend to sign one case. Only you can set it, since it rests on your overhead, how long cases take to pay out and how many more your lawyers can carry. Ceiling = expected fee per signed case × that share. Since fees land months or years after the ad ran, each month gets judged against the ceiling, and collected fees correct it over time.

Which channels can you measure, and how?

A tracking number is a second phone number that rings at your own desk and tells you which ad the caller saw. The click id is a code Google attaches to every ad click; stored with the case, it ties the retainer to its click.

Local Services Ads are Google's per-lead ads, as opposed to per-click, and personal injury lawyer services is one of their US categories (Google, checked 2026-10-04). Screening covers a state bar license check for each personal injury lawyer at the firm, plus professional liability insurance where local law requires it (Google, checked 2026-10-04). You're charged for each valid lead, which can be a call you pick up, a voicemail, a message or a booking request, and according to Google, leads it judges invalid or low quality are not billed (Google, checked 2026-10-04). Still, a lead is only a contact, so these ads get judged on cost per signed case too.

For referrals, ABA Model Rule 7.2(b) says a lawyer may not give anyone something of value for recommending the lawyer. Its exceptions include paying the reasonable cost of advertising, paying a qualified lawyer referral service's usual charges, and a reciprocal referral agreement that is not exclusive and that the client is informed of (ABA, checked 2026-10-04).

Why do leads, calls and consultations mislead?

What a Google Ads report calls a lead is anything the account counts as a conversion, such as a form, or a call lasting longer than a minimum length the account sets (Google, checked 2026-10-04). When calls and forms are both counted, they add up in one Conversions column, and that total can also hold callers with only property damage, current clients, people injured in a state where you don't practice, and vendors. A booked consultation gets closer but is still only a meeting: people miss it, sign with another firm or turn out to have no claim.

The first step that is worth money is a signed retainer, and the last is a collected fee. Google's automatic bidding sets each bid to win more conversions, so it pursues whatever the account counts; count calls and it brings you more calls. If each signed retainer goes back to Google Ads with its click id, the account learns which clicks turned into cases. The upload from your records to Google shows how.

What should intake count for every source?

Intake attaches the source at step 1, picking from the fixed list in the channel table, and it stays with the case through step 5. How many contacts turn into cases depends on what happens between the first call and the retainer.

What does one month look like on paper?

Illustrative: I invented this two-lawyer personal injury firm and every figure in its month; none of them comes from a client.

Over the last two years this imaginary firm closed 50 cases and, net of unrecovered costs, collected $600,000 in fees, so its expected fee per signed case is $600,000 ÷ 50 = $12,000. Its owners will spend up to a quarter of that per case, which puts the ceiling at $12,000 × 0.25 = $3,000.

• Search ads cost $18,000 ÷ 36 = $500 per lead by the agency's count, and $18,000 ÷ 4 = $4,500 per signed case, which is over the ceiling. At this spend, search would need $18,000 ÷ $3,000 = 6 signed cases.
• Local Services Ads come in under the ceiling at $6,000 ÷ 3 = $2,000, even though 30 of the 40 leads Google charged for never qualified.
• TV cost $12,000 ÷ 1 = $12,000, the entire expected fee. One more case would cut that in half to $6,000, so judge TV on a quarter's numbers rather than a month's.
• The blended figure, $36,000 ÷ 14 = $2,571, lands under the ceiling only because sources with no media cost signed 6 of the 14 cases, and it hides that search and TV run over.

What can a personal injury ad say?

I'm not a lawyer, so read what follows as orientation rather than legal advice. The ABA Model Rules are a template; every state bar writes its own, so check your state's current text before an ad goes out.

Under Rule 7.1, no communication a lawyer makes about the lawyer's services may be false or misleading (ABA, checked 2026-10-04). Comment [3] warns that even a truthful report of client results can mislead if it would leave a reasonable person with an unjustified expectation that other clients in similar matters could get the same results, without reference to the facts and law of each case. It says the same of an unsubstantiated comparison with other firms that is specific enough for a reasonable person to think it can be substantiated, and it notes that either finding may be prevented by an appropriate disclaimer or qualifying language (ABA, checked 2026-10-04). The comments don't mention testimonials, so your state's rule decides on client quotes.

Rule 7.2(d) makes every ad say who answers for it, with the name and contact details of at least one lawyer or firm responsible for the ad (ABA, checked 2026-10-04).

Among other things, Rule 7.3 covers live person-to-person contact, whether face to face, live by phone or over real-time video. A lawyer may not use it to solicit a specific person who needs legal help when pecuniary gain, meaning the fee, is a significant motive. The rule exempts other lawyers, people who routinely use that kind of legal service for business, and anyone with a family or close personal relationship, or a prior business or professional one, with the lawyer or firm (ABA, checked 2026-10-04). Its comments add that a communication aimed at the general public, such as a billboard, a website or a TV commercial, is not solicitation; neither is one generated automatically in response to an online search; and text messages are not live contact (ABA, checked 2026-10-04).

A state can go further. In Florida Bar v. Went For It, Inc. (1995), the Supreme Court, 5 to 4, rejected a First Amendment challenge and upheld the Florida Bar rules then in force, which barred personal injury lawyers from sending targeted direct mail to accident victims and their relatives for 30 days after an accident or disaster (Cornell LII, checked 2026-10-04). Before any letter or message goes to a named accident victim, check your state's current rule. How the rules apply to search ads and landing pages covers the rest.

Questions to put to your agency or media buyer

• What goes into the Conversions column, and how long must a call last to count as a conversion?
• Last month, what did each campaign cost per signed case, using the count from the firm's case management system?
• Does each new case get its click id saved, and do signed retainers go back to Google Ads?
• Which tracking number belongs to each campaign, to the Local Services listing and to each TV spot?
• Who reviews each ad against the state bar's rules before it runs, and where is a copy of each ad as it ran?