Cost Per Case Calculator for Law Firms

What Cost Per Case Actually Measures

Cost per signed case is the single most decision-useful number in law firm marketing: total marketing spend divided by the number of cases actually retained. Cost per lead flatters cheap channels that produce unqualified inquiries; cost per case exposes them. The calculator walks your spend through the full funnel — leads, consultations, signed matters — so you can see exactly where money leaks out. A channel that produces $80 leads that never sign is more expensive than a channel producing $300 leads that sign half the time, and only cost-per-case math makes that visible.

Typical Cost Per Signed Case by Practice Area

Typical industry ranges for acquisition cost by practice area
Practice area	Cost per lead	Cost per signed case	Notes
Personal injury	$100–$600+	$1,500–$6,000+	Highest competition; large case values justify high acquisition cost
Family law	$60–$250	$500–$1,500	Steady demand; retainer economics cap what a case can cost
Criminal defense	$50–$200	$400–$1,200	Urgency-driven; speed to answer dominates conversion
Immigration	$40–$150	$300–$1,000	High volume, lower fees; efficiency matters most
Estate planning	$30–$120	$200–$700	Low competition; referrals and local search do heavy lifting
Corporate / business	$80–$300	$500–$2,500	Longer sales cycles; lifetime value far exceeds first matter

Typical industry ranges compiled from published legal marketing benchmarks; individual markets vary widely.

These are typical industry ranges, not promises — a firm's actual numbers depend on market, channel mix, and intake quality. The useful comparison is your own trend over time and your cost per case against your average case value. As a rule of thumb, acquisition cost below 20–25% of first-case value is sustainable for most consumer practices; personal injury firms can tolerate higher ratios because case values are large and referrals compound.

How to Lower Cost Per Case Without Cutting Spend

The fastest lever is rarely cheaper leads — it is converting more of the leads you already pay for. Moving the lead-to-consultation rate from 40% to 55% cuts cost per case by more than a quarter with zero new spend. The usual culprits are slow response (leads that wait hours go elsewhere), missed after-hours calls, and no follow-up sequence. An AI receptionist answers every call instantly around the clock, and an AI chatbot converts website visitors who will never phone. Run the Intake Conversion Calculator to find your biggest funnel leak, then fix that stage first.

Reading Your ROI Multiple

The ROI multiple — revenue from signed cases divided by marketing spend — tells you whether to scale. Above 5x, your constraint is usually capacity or lead volume, and adding budget is rational (size that budget with the Marketing Budget Calculator). Between 3x and 5x is healthy but worth optimizing before scaling. Below 3x, more spend just buys more waste: fix intake, landing pages, and follow-up, and shift budget toward compounding channels like SEO and Google Business Profile. Remember also that first-case revenue understates true return — repeat matters and referrals mean a signed client is worth more than one case, which the Client Lifetime Value Calculator quantifies.

Track It Monthly, By Channel

Blended cost per case hides the story. Track spend, leads, consultations, and signed cases separately for each channel — paid search, Local Services Ads, SEO, Google Business Profile, referrals — and compute cost per case for each. Most firms discover one channel is subsidizing another. Firms invisible in AI search are also increasingly missing a free channel entirely: check yours with the AI Visibility Checker, and see our AI SEO service for how to fix it.

Educational estimates only. This calculator uses typical industry ranges and simplified models to help law firms across North America think through the numbers. Results are not financial, legal, accounting, or valuation advice, and actual figures vary by market, firm, and practice mix. Verify decisions with your own data and professional advisors.

Frequently Asked Questions

Questions About This Calculator

What is a good cost per signed case for a law firm?

A sustainable rule of thumb is an acquisition cost below 20–25% of average first-case value. Typical industry ranges run $1,500–$6,000+ per signed case in personal injury, $500–$1,500 in family law, $400–$1,200 in criminal defense, and $200–$700 in estate planning — always judged against the case values in your market.

How do I calculate cost per case?

Divide total monthly marketing spend by the number of cases signed that month from marketing-generated leads. To see where money leaks, also compute the intermediate steps: cost per lead (spend ÷ leads) and cost per consultation (spend ÷ consultations held).

Why is my cost per lead low but my cost per case high?

Because your funnel leaks between lead and signature. Cheap leads that never answer follow-up, no-show consultations, or slow response times all inflate cost per case while cost per lead looks great. Fixing intake speed and follow-up usually lowers cost per case faster than finding cheaper leads.

What marketing ROI multiple should a law firm target?

A 3–5x return (revenue from signed cases divided by marketing spend) is healthy for most firms; 5x+ signals room to scale spend. Below 3x, the priority is conversion — intake, follow-up, and landing pages — rather than more budget. First-case revenue also understates true ROI once repeat matters and referrals are counted.

How can a law firm lower its cost per signed case?

Improve conversion before buying more leads: answer every call including after hours, respond to web inquiries within minutes, add automated follow-up, and reduce consultation no-shows with reminders. AI receptionists and chatbots typically lift lead-to-consultation rates materially, which lowers cost per case at every spend level.

Should cost per case be tracked separately by channel?

Yes. Blended numbers hide the fact that channels perform very differently — paid search may sign cases at $2,000 each while SEO signs them at $400. Track spend, leads, consultations, and signed cases per channel monthly, and reallocate budget toward the channels with the lowest cost per signed case.