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What does a signed client cost in ad spend?

Ad cost per signed client for law-firm search and video ads and for Local Services Ads, shown as ranges. Ad cost only. Free CSV and JSON under CC BY 4.0.

Last checked October 27, 2026 by our data desk

A signed client from ads costs thousands of dollars in ad spend. In the Probative benchmarks, the ad cost per signed client is $5,500–6,000 for search and video ads on Google and Microsoft, and $4,000–4,500 for Local Services Ads.

Probative benchmarks, 2025–2026

What a signed client costs, by ad channel

What is measuredPublished figure
Search and video ads on Google and Microsoft: ad cost per signed client$5,500–6,000
Local Services Ads: ad cost per signed client$4,000–4,500
Values are rounded and protected as the methods page describes. A band or tier is approximate, plus or minus one step. How each is measured.

What does this mean for your firm?

  • Track cost per signed client, not cost per lead. It is the number that tells you whether a channel pays.
  • Add your own costs. These ranges count ad spend only, so staff time and agency fees come on top.
  • Compare channels on the same basis. Count signed clients by the source they came from, and divide each channel’s ad cost by them.

Why is Local Services Ads lower here?

Local Services Ads charge per lead rather than per click, and the leads are mostly phone calls from people ready to talk. Search ads also pay for clicks that never call. Case mix differs too, so the gap in your own numbers may be larger or smaller.

How do I read this table?

Each row is ad cost divided by the signed clients that came from those ads, with injury and employment combined, shown as a five-hundred-dollar range. Every value is aggregated across many observations, and rows that did not meet the privacy rules are suppressed for privacy.

The figures are ranges, so treat each as approximate. How the benchmarks are made and protected.

Download this table and cite it

  • What a signed client costs, by ad channel CSVJSON

Each table is its own file. Free, with no email or login, under CC BY 4.0: copy and adapt it with credit to Probative Growth.

Cite this dataset: Probative Growth (2026). Probative benchmarks, 2025–2026 (v4.0.1) [Data set]. CC BY 4.0. https://doi.org/10.5281/zenodo.23735849. https://probativegrowth.com/research/benchmarks/cost-per-signed-client/

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How each figure is made and protected · Probative benchmarks, 2025–2026

Published by Probative Growth, a marketing agency for law firms. See our services and pricing.

Questions firms ask

What does a signed personal injury client cost in ad spend?

The table above gives the range for search and video ads and for Local Services Ads, with injury and employment combined. It counts ad cost only, so add staff time and any agency fee to compare it with your own full cost.

Are Local Services Ads cheaper per signed client than search ads?

In the Probative benchmarks, yes: the Local Services Ads range sits below the range for search and video ads. Check your own numbers before you move budget, because the mix of cases differs between the two.

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