Google Ads is the single largest line item in most PI firm marketing budgets. It’s also the most misunderstood.
The platform itself isn’t complicated. You pick keywords, write ads, set a budget, and pay when someone clicks. The complexity is in what happens after the click.
How Much Law Firms Actually Spend
The range is enormous because markets are so different. A personal injury firm in Boise competes against 8-10 advertisers. One in Houston competes against 50+.
Here’s what spend looks like by market tier:
Small markets (under 20 competitors): $8-15K/month gets meaningful visibility. CPCs: $40-80. You can dominate with smart targeting.
Mid-size markets (20-35 competitors): $20-50K/month for consistent lead flow. CPCs: $80-150. Keyword selection matters more here because you can’t afford to bid on everything.
Major metros (35+ competitors): $50-100K+/month. CPCs: $150-200+. You need dedicated landing pages, aggressive Quality Score optimization, and call tracking that attributes to the case level.
The number that matters isn’t monthly spend. It’s cost per signed case. A firm spending $80K/month that signs 25 cases has a $3,200 cost per case. A firm spending $20K/month that signs 3 cases has a $6,667 cost per case. The bigger spender wins on unit economics.
The Campaign Structure That Works
Most law firm Google Ads accounts are a mess. One campaign, 200 keywords, all pointing to the homepage. That’s not a strategy. That’s a donation to Google.
Structure it by intent:
Campaign 1: Case-type specific. “Car accident lawyer,” “truck accident attorney,” “motorcycle accident lawyer.” Each ad group gets its own landing page matching the case type. This is your money campaign.
Campaign 2: Branded. Your firm name and variations. If competitors bid on your name (and they do), you need to be here. CPCs are low, conversion rates are highest.
Campaign 3: Competitor. Other firm names in your market. Aggressive play. Lower conversion rates but captures people actively comparing firms.
Campaign 4: Informational. “How much is my car accident case worth,” “what to do after a slip and fall.” Lower CPCs, higher volume, longer conversion path. These need content-rich landing pages, not your intake form.
What Most Firms Get Wrong
They don’t track calls. 85% of PI leads start with a phone call. If you’re only tracking form fills, you’re measuring 15% of your results. Call tracking with dynamic number insertion is non-negotiable.
They send everything to the homepage. Your homepage is built for brand. Landing pages are built for conversion. The difference in conversion rate is typically 3-4x.
They optimize for leads, not cases. Ten leads that produce zero cases cost infinity per case. Two leads that produce two cases are gold. Attribution that follows through to the signed retainer changes how you optimize.
They ignore the awareness layer. Google Ads captures demand. It doesn’t create it. Firms running CTV and streaming campaigns see 15-30% increases in branded search volume. More people searching your name means cheaper clicks and higher conversion on the ads you’re already running.
Google Ads vs. Everything Else
Google Ads is highest-intent because people are actively searching for a lawyer. But it’s not the only channel.
SEO is slower to build but generates free traffic once you rank. The best firms run both: paid for immediate lead flow, organic for compounding returns.
CTV and streaming create awareness. They don’t produce direct leads the way Google Ads does. What they do is fill the top of the funnel so Google Ads converts better at the bottom.
Social media (Facebook, Instagram) works for retargeting. Someone visits your site from Google Ads, doesn’t call, and sees your ad on Instagram that evening. That’s the conversion path. Social as a primary lead source for PI rarely pencils.
The firms growing fastest don’t pick one channel. They build a system where awareness feeds search, search feeds intake, and attribution ties it all together.
What to Ask Your Agency
If your agency can’t answer these questions, that’s your answer:
What’s our cost per signed case by campaign? Which keywords produced signed cases last month, not just leads? What’s our Quality Score trend and what are you doing about it? How are we tracking phone calls back to the click? What does our conversion path look like from first touch to retainer?
If the answer to any of these is a blank stare or “we’ll get back to you,” you’re paying for reporting, not results.
For PI firms spending $10K+ per month that want to see exactly how their Google Ads stack up against every competitor in the market, request a competitive audit. It’s built from the same data we track across 210 US markets.