Most marketing reports stop at cost per lead or cost per click. Those numbers look good on a slide, but they don't pay anyone's salary. A lead that never signs costs you the ad spend and the staff time, and brings in nothing.
Cost per signed client is the number that connects what you spend to what you earn. It's also the number that shows intake problems most clearly, because a weak intake process makes every marketing dollar more expensive.
What cost per signed client means
Cost per signed client is what you spend to bring in one new paying client.
Cost per signed client = acquisition costs ÷ new signed clients, for the same period
There are two versions worth tracking, and they answer different questions.
Marketing cost per signed client
Only count money spent to generate leads: ads, directory listings, sponsorships, website and SEO costs, referral program costs. This tells you whether your marketing is pulling its weight.
Fully loaded cost per signed client
Add the cost of turning leads into clients: intake staff time, answering services, intake software, the CRM, reminder and e-signature tools, and attorney time spent on consults that didn't sign. This tells you what a client really costs your firm.
The gap between the two is your intake cost. If it's large, that's not automatically bad. Good intake costs something. But if the gap is large and conversion is low, you're paying twice for leads you're losing.
How to calculate it, with an example
These numbers are made up to show the math. Say last quarter your firm spent:
- $12,000 on Google Ads
- $3,000 on a directory listing
- $1,500 on website and SEO
- $6,000 in intake staff time (share of salaries spent on intake)
- $1,500 on intake tools and answering service
And signed 30 new clients.
Marketing cost per signed client: $16,500 ÷ 30 = $550. Fully loaded cost per signed client: $24,000 ÷ 30 = $800.
Then look at it next to fees
Cost per signed client means nothing alone. Put it next to your average fee. Say, as an example, your average flat fee for this practice area is $3,500. Spending $800 to sign a $3,500 client is very different from spending $800 to sign a $1,200 client.
A quick ratio helps:
Average fee ÷ fully loaded cost per signed client
In this example, $3,500 ÷ $800 is about 4.4. Each dollar of acquisition cost brought in about $4.40 in fees. Decide what ratio works for your margins, then watch whether it moves.
Break it out by source
The overall number hides a lot. Run the marketing version for each lead source:
| Source | Spend | Signed | Cost per signed client | |---|---|---|---| | Google Ads | $12,000 | 15 | $800 | | Directory | $3,000 | 3 | $1,000 | | Referrals | $0 | 9 | $0 | | Organic search | $1,500 | 3 | $500 |
Again, illustrative. But this is the kind of table that changes budgets. To build it with real numbers, you need source data on every signed client. See how to track lead sources at a law firm.
Where to get the data
- Ad platforms and invoices for marketing spend.
- Payroll for intake staff costs. Estimate the share of each person's time spent on intake.
- Software invoices for intake tools.
- Your CRM or practice management software for new signed clients and their source.
- Your billing system for average fees by practice area.
Use the same period for everything. If you count signed clients by the month the lead came in (a good habit), count spend the same way.
What moves the number
There are two ways to bring cost per signed client down. Spend less, or sign more from the same spend. Small firms usually find the second one easier.
Stop losing leads you already paid for
Every missed call and slow callback raises your cost per signed client. The ad already ran. The click already cost you. Answering more calls and responding faster signs more clients from the same budget. We go through the numbers in what a missed call costs a law firm.
Book on the first call
Each callback cycle loses some people. Booking the consult during the first conversation cuts that out.
Raise show rate
A booked consult that doesn't happen is an attorney hour spent and a lead lost. Reminders and fast follow-up on no-shows help. See consultation show rate.
Get the retainer signed while they're decided
When someone leaves a consult ready to hire you, send the retainer right away. Every day it sits gives them time to second-guess.
Cut sources that don't sign
Once you have the by-source table, the weakest source is usually obvious. Move that budget to what works, or test a change and measure again.
What to do this week
- Add up last quarter's marketing spend and intake costs.
- Count new signed clients for the same quarter.
- Calculate both versions of cost per signed client.
- Put each next to your average fee for that practice area.
- If you have source data, build the table above. If you don't, start capturing source on every lead today.
Where IntakeGenius fits
IntakeGenius works on the "sign more from the same spend" side. The AI voice agent answers every call and books the consult, consult reminders go out automatically, and the retainer goes out for e-signature within minutes of the consult. IntakeCRM keeps the record from first contact to signed retainer so you can actually calculate this number. Plans start at $299 a month, with details on the pricing page.
Want to see it against your own numbers? Book a 15-minute demo. No slides.