How to Build a 90-Day Legal Marketing Budget for a Chicago Personal Injury Law Firm (with CPL Targets)
A realistic 90-day legal marketing budget for a Chicago personal injury law firm typically ranges from $15,000 to $60,000, with CPL targets often landing between $150–$400 for qualified calls/leads depending on channel and case mix. Chicago’s PI market is competitive across Google Ads, LSAs, and organic search, so budgeting must prioritize conversion quality—not just click volume. This article shows how to build a 13-week budget with channel allocations, CPL targets, tracking requirements, and adjustment rules.
Why a 90-day budget is the sweet spot for Chicago personal injury marketing
A 90-day (13-week) legal marketing budget is long enough to generate statistically meaningful data, but short enough to change direction before wasted spend compounds. In Chicago personal injury, where costs can spike quickly due to competition and seasonality (construction claims, winter slip-and-falls, and summer driving patterns), you need a disciplined window that forces measurement and fast iteration.
For most plaintiff PI firms, the purpose of a 90-day budget is not “brand awareness.” It is to produce a predictable volume of qualified inquiries—calls, chats, and forms—from people with a plausible injury claim, appropriate venue, and workable liability story.
Step 1: Set 90-day business targets first (not channel budgets)
Start with outcomes, then work backward into spend. Attorneys often jump straight to “How much should we put into Google Ads?” The better first question is: “How many signed cases do we need in the next 90 days, and what lead volume is required to get there?”
Define the minimum viable KPI stack
For a Chicago PI firm, the core 90-day KPI stack typically includes:
- Qualified leads (QL): leads that meet your screening rules (injury type, treatment, liability, jurisdiction/venue, no conflicts).
- Consultations (or attorney callbacks) scheduled
- Signed cases
- Cost per lead (CPL) by channel
- Cost per signed case (CPS) by channel (where attribution supports it)
Use conservative Chicago PI conversion assumptions
Every firm’s intake and case selection is different, but conservative planning assumptions for a 90-day budget often look like this:
- Lead → Qualified lead: 40%–70%
- Qualified lead → Consult scheduled: 50%–80%
- Consult → Signed case: 20%–40%
Example planning math: If you need 10 signed cases in 90 days and you sign 30% of consults, you need ~34 consults. If 60% of qualified leads book consults, you need ~57 qualified leads. If 60% of total leads are qualified, you need ~95 total leads in 90 days.
Step 2: Choose a total 90-day spend range that matches your goals
In Chicago personal injury, budgets commonly fall into three workable tiers (excluding large TV buys):
Tier A: “Proof and build” (approx. $15,000–$25,000 per 90 days)
Best for small firms or firms retooling intake and tracking. Focus on one paid channel plus foundational local SEO and conversion improvements.
Tier B: “Competitive local acquisition” (approx. $25,000–$45,000 per 90 days)
Best for firms that want consistent weekly lead flow. Typically supports Google LSAs + Google Ads + SEO/content plus dedicated tracking.
Tier C: “Aggressive growth” (approx. $45,000–$60,000+ per 90 days)
Best for firms expanding into multiple case types (auto, premises, workers’ comp coordination) or covering broader Chicagoland. Requires strong intake operations and tight negative keyword/lead quality controls.
Important: A higher budget does not automatically mean more signed cases. In PI, scaling frequently increases CPL because you exhaust the easiest demand first and begin competing in more expensive auctions and broader keywords.
Step 3: Set CPL targets by channel (Chicago PI benchmarks)
CPL varies by injury type (auto vs. trucking vs. med mal), urgency, and how strictly you define “qualified.” For budgeting, use targets that reflect qualified inquiries—not just any form fill.
Practical 90-day CPL targets
- Google Local Services Ads (LSAs): $150–$300 CPL (qualified calls/messages)
- Google Search Ads (PPC): $250–$450 CPL (qualified leads)
- Local SEO (GBP + organic): $80–$200 CPL equivalent over time (cost allocation model)
- Remarketing (display/video): often measured as assisted conversions; if forced into CPL, expect wide variance ($100–$350+) depending on attribution
- Legal directories / lead programs: commonly $300–$700+ CPL; quality can vary significantly
These are planning targets, not promises. Your actual CPL will depend heavily on your intake speed, ad copy compliance, landing page quality, review profile, and your ability to filter non-case calls (property damage-only, no injury, out-of-state, etc.).
Step 4: Allocate your 90-day budget across channels (with examples)
A 90-day budget should include (1) acquisition spend, (2) conversion infrastructure, and (3) measurement. If you only fund clicks/calls without tracking and intake improvements, you cannot diagnose what’s working.
Recommended channel split (balanced Chicago PI plan)
A common, defensible 90-day allocation for a Chicago PI firm targeting near-term cases:
- 40% Google LSAs (high-intent local calls)
- 35% Google Search Ads (coverage and scaling)
- 15% Local SEO + content (compounding asset)
- 5% Remarketing (capture consideration-stage prospects)
- 5% Tracking, call recording review time, CRO tools (or treat these as fixed costs)
Budget example: $30,000 total over 90 days
Assume Tier B with a $30,000 budget:
- LSAs (40%): $12,000 → target ~40–80 qualified leads at $150–$300 CPL
- PPC (35%): $10,500 → target ~23–42 qualified leads at $250–$450 CPL
- SEO/content (15%): $4,500 → GBP optimization, service pages, Chicago neighborhood modifiers, internal linking
- Remarketing (5%): $1,500
- Tracking/CRO (5%): $1,500 → call tracking, form tracking, landing page tests
If these targets hold, a plausible planning range is 63–122 qualified leads in 90 days from paid sources plus incremental organic. Actual signed cases will depend on intake performance and case criteria.
Step 5: Build your weekly pacing model (so you don’t “blow the quarter” in week 3)
A 90-day budget works best when broken into weekly caps and review checkpoints. Chicago PI PPC can surge due to competitor moves, news cycles, and algorithm shifts.
13-week pacing rule
- Divide each channel budget by 13 to create a weekly pacing target.
- Allow a controlled variance of ±10% per week.
- Hold back 10% of total budget as a “swing fund” to reallocate to the channel producing the best qualified cases by weeks 6–9.
Example pacing (LSAs)
$12,000 over 13 weeks ≈ $923/week. If LSAs are producing qualified calls at or below your target CPL and generating viable consults, you can increase spend by shifting from underperforming PPC ad groups or directories.
Step 6: Define “qualified lead” in writing (to control CPL inflation)
In personal injury marketing, CPL can look “great” until you listen to calls. The fastest way to waste a 90-day budget is to treat every inbound call as success. Create a written qualification standard and apply it consistently across channels.
Chicago PI qualification checklist (sample)
- Incident location/venue: Chicago or appropriate Illinois jurisdiction
- Injury + treatment: medical treatment initiated (or scheduled) within a reasonable timeframe
- Liability: clear adverse party and plausible negligence
- Timing: within limitations period; no obvious notice issues (public entities, etc.)
- Damages indicators: ER visit, imaging, PT, surgery recommendation, wage loss
- Conflict check: completed early in intake workflow
When marketing reports show “leads,” require a second number: qualified leads. Your CPL target should be pegged to qualified leads, not raw inquiries.
