Most PI Firms Ask How Much to Spend.
That Is the Wrong Question.

A PI attorney in Dallas called me to ask what he should be spending on marketing. He was at $6,500 per month and not sure if it was too much or too little. I asked him one question before answering. What does a signed case cost you to generate right now? He did not know. That is the only number that determines whether $6,500 is too much, too little, or exactly right. Without it, any budget figure is just a guess dressed up as a decision.

Why the percentage-of-revenue framework fails PI firms

The most commonly cited marketing budget advice for law firms is to spend 2 to 5 percent of gross revenue on marketing. This advice is repeated so often that most attorneys treat it as fact. It is not useful for PI firms and here is why.

A firm that closed one $500,000 trucking case last quarter has very different marketing needs than a firm that closed 20 auto accident cases at $25,000 each. Their revenue is similar. Their marketing situation is completely different. One is building volume. The other is managing case type and referral strategy. The same percentage of revenue produces a completely different budget and neither budget comes with any guidance on whether it will produce the desired result.

The framework that actually works starts from the other end. What is a signed case worth to your firm in attorney fees? What percentage of that should it cost to generate? That gives you a target cost per signed case. From there you work backwards to the budget that can hit that target given your market, your competition density, and your conversion rate.

Ben Glass has written about this distinction for years. His argument is that law firm marketing budgets set from revenue percentages produce mediocre results because they have no connection to what the firm is actually trying to achieve. A budget built from a target cost per signed case is a strategy. A budget built from a percentage of last year's revenue is a habit.

The only calculation that matters before setting a budget

Here is the calculation. Do it with your own numbers before reading further.

Step one: take everything you spent on marketing last month. The agency fee, the ad spend, the tools, all of it. Write that number down.

Step two: count the cases you signed last month that came from a marketing touchpoint. Not referrals. Not repeat clients. Cases that came in because of something you spent money on. Write that number down.

Step three: divide step one by step two. That is your current cost per signed case.

Step four: take your average attorney fee on a signed PI case. Multiply it by 0.07. That is your target cost per signed case at 7 percent, which is a healthy benchmark for most PI markets.

If your current number is higher than your target, the question is not whether to spend more. The question is where the system is leaking. Fixing the leak costs far less than increasing the budget and produces a better result faster.

If your current number is lower than your target, you have room to scale. Increasing the budget at that point is a straightforward multiplication of a system that is already working.

What a realistic PI marketing budget looks like by firm size

Where the budget goes and why each piece matters

A complete PI marketing budget has four components. Understanding what each one does and what happens when one is missing helps you evaluate any proposal you receive from any agency.

The system build is a one-time cost. It covers the quiz funnel, the AI intake agent, the Google Business Profile optimization, the ad campaign setup, and the reporting dashboard. This is the infrastructure. Every dollar spent after this point runs on top of this foundation. A firm that skips the build and goes straight to monthly ad spend is running traffic into a system that was never designed to convert it.

The monthly management fee covers ongoing optimization, reporting, ad management, and system maintenance. A flat management fee with transparent ad spend reporting is the correct structure. Any arrangement where the agency bundles ad spend into their fee and charges a percentage of total spend creates a conflict of interest. The agency makes more money when you spend more, regardless of whether spending more produces more cases.

The ad spend goes directly from your card to Google and Meta. It never touches the agency. You receive the billing receipts. This is not a preference. It is a structural requirement that protects you from one of the most common ways law firms are overcharged by marketing agencies.

The AI intake calls are billed at cost per minute, fully transparent and reported as a line item every month. At $0.40 per minute, 200 calls at an average of 3 minutes each costs roughly $240 per month. This is the component most attorneys underestimate in importance and overestimate in cost. The AI call that fires within 7 minutes of a lead submitting their information is the single highest-return component of the entire system.

The budget mistake that costs the most cases

The most expensive budget decision a PI firm makes is not spending too much. It is spending on traffic before fixing the conversion system.

Bo Royal at Pareto Law frames this as a sequencing problem. Traffic is the accelerant. The funnel is the engine. Pouring accelerant on an engine that is not running produces a fire, not forward motion. The correct sequence is to build the engine first, confirm it converts, and then scale the traffic.

In practical terms this means the quiz funnel, the AI intake system, and the follow-up sequence should be built and tested before any significant ad spend begins. A firm that builds the system correctly and then runs $3,000 per month in ads will outperform a firm running $10,000 per month into a homepage every time. The difference is not the budget. It is the sequencing.

Russell Brunson made this point a different way in the context of funnels. The money is in the follow-up, not the front end. The front end gets the click. The follow-up gets the case. Most PI firms spend all their budget on the front end and nothing on the follow-up. The budget allocation should reflect where the conversion actually happens.

How to evaluate whether your current budget is working

Every marketing budget review should answer three questions, in this order.

What is the current cost per signed case and how has it moved over the last three months? If it is going down, the system is improving. If it is going up, something in the funnel or the intake is breaking down. If you cannot answer this question, the budget review has not started yet.

Which channel is producing the lowest cost per signed case and is it getting the most budget? Most PI firms discover that their Google Business Profile organic traffic produces the lowest cost per signed case of any channel because the leads come in with high intent and no ad spend attached to them. Most of those same firms are spending nothing on maintaining the GBP and everything on paid ads.

What would happen to case volume if the budget increased by 20 percent right now? If the answer is that cases would increase proportionally, the system is working and scaling makes sense. If the answer is uncertainty, the system has unconverted capacity that needs to be fixed before the budget increases.