Before comparing costs and results, it helps to understand what you are actually buying with each channel.
Search Engine Optimization (SEO)
SEO is the process of earning organic rankings in Google's unpaid results. When someone searches "divorce attorney in Denver" and clicks a result that is not an ad, that click is free. The investment is in the work that earned the ranking: technical site health, authoritative content, local citations, and backlinks from credible sources.
The defining characteristic of SEO is that it compounds. A well-optimized page for "criminal defense attorney Chicago" can generate traffic for years. The tradeoff is time — most firms should expect 4–6 months before meaningful ranking movement, and 9–12 months before organic becomes a reliable lead source. That timeline varies by market competition and your site's existing authority.
Pay-Per-Click Advertising (Google Ads)
PPC puts your firm's text ad at the top of search results. You pay each time someone clicks. In legal, click costs are among the highest of any industry — practice areas like personal injury, mass tort, and criminal defense in major metros can run well into double or triple digits per click.
The advantage is immediacy. You can be visible on day one. The risk is dependency: the moment you stop paying, the traffic stops. There is no residual value from a PPC campaign the way there is from a ranked piece of content.
Local Service Ads (LSAs)
LSAs are Google's lead-based product specifically designed for service businesses, including law firms. They appear above standard PPC ads in many searches and charge per lead, not per click. Firms must pass Google's verification process, which for attorneys includes a background check and bar license confirmation.
LSAs show a "Google Screened" badge, which carries trust signals that standard ads do not. Because you pay per qualified lead rather than per click, the cost structure is more predictable — though lead quality and volume vary significantly by market and practice area.