Short answer: Divide the new clients you want by the share of calls that sign. If you want 6 clients and 1 call in 5 signs, you need 30 calls. The sign rate moves that number more than the ad budget does, because a firm that signs 1 call in 10 needs twice as many calls for the same result.
A firm wants six new clients next month. The partner asks the marketing team for a plan, and the team answers with a budget. But the question the budget has to answer comes first: how many calls, forms and messages does it take to sign six people?
Work that out backward and a few things get clear fast. You see the call volume your ads must produce, what that volume costs, and how much of the plan depends on what happens after the phone rings.
Free tool: The Customer Goal Calculator starts with your client goal and works back to the calls you need and what the plan costs. No account or email required.
Start from the goal, not the budget
Most firms pick a budget and then hope it produces clients. Working backward reverses that. You state the goal, then check whether the plan around it makes financial sense.
Our overview, how many calls do you need to reach your goal, explains the method for any business. This post runs it for a law firm and shows what a change in sign rate does.
What the Customer Goal Calculator page shows
The tool's own example is a general business, not a law firm, but the inputs are the same.
| What you enter | Value |
|---|---|
| Customer goal | 10 customers in one month |
| How many contacts end up buying | 25% |
| Ad cost per call, form or message | $50 |
| Ad management | $200 |
| Setup | $100 |
| What you keep per customer after job costs | $400 |
| What you get | Value |
|---|---|
| Calls, forms or messages needed | 40 (10 divided by 25%) |
| Ad spend | $2,000 (40 times $50) |
| Total cost of the plan | $2,300 ($2,000 plus $200 plus $100) |
| What is left after those costs | $1,700 (10 customers times $400 is $4,000, minus $2,300) |
The page adds a caution worth keeping in mind:
From the Customer Goal Calculator page: "To win 10 customers, this plan needs 40 calls, forms or messages. It shows what your guesses add up to. It does not show how many people want your service."
A fictional example: six new clients
Fictional example. Cedar and Pike Law is made up, and the numbers are invented to show the math. They are not benchmarks.
The firm wants 6 new retained clients in a month. It estimates $90 in ad cost per call, $500 for ad management and $300 for one-time setup. A typical matter leaves $2,400 after the cost of handling it.
Here is the same plan at three different sign rates.
| 10% of calls sign | 20% of calls sign | 30% of calls sign | |
|---|---|---|---|
| Calls, forms or messages needed | 60 | 30 | 20 |
| Ad spend (at $90 each) | $5,400 | $2,700 | $1,800 |
| Total cost of the plan | $6,200 | $3,500 | $2,600 |
| What is left after those costs | $8,200 | $10,900 | $11,800 |
The firm in the middle column spends $3,500 to sign six clients. The firm in the left column spends $6,200 for the same six. The ad budget did not change the outcome. The sign rate did.
This is also why the right-hand column is not a promise. Moving from 20% to 30% means answering faster, asking better questions and following up. Those changes are in the firm's hands, not the ad platform's.
Where the sign rate comes from
A call becomes a client through a short chain: someone answers, someone asks the right questions, a consultation is booked, the person shows up and a retainer is signed. A break anywhere lowers the rate.
Three places to look first:
- Who answers, and when. A call that goes to voicemail after hours is often a call to the next firm on the list.
- What intake asks. Questions should help you decide fit, not feel like a form.
- What happens after a no. Some people are not ready on day one. A written follow-up step catches them.
The Lead Follow-Up Planner helps you write down who answers each channel and what they ask. Our post on calls that do not become customers lists the five most common leaks.
How to use the calculator for your firm
- Set the goal for one practice area. Mixing case types blurs the math.
- Enter your own sign rate. The page says to use "customers won out of calls from the same group and time period, or pick a percent."
- Enter your real cost per call. The tool does not make one up. "You enter it. Use your own records from the same time period if you have them."
- Fill in every cost you know. If you leave an optional cost blank, the page says the tool "does not give a total." It "does not treat blank as zero."
- Check what remains. The page is clear that what you keep is "before rent, taxes and other costs. It is not your profit."
What if no one signs?
If your sign rate is zero, the math stops, and the tool says why: "Then no number of calls gets you a customer, so the tool cannot work out how many calls you need. Check your guess and how you follow up." For a firm, that is a signal to look at intake before spending another dollar on ads.
A note on legal advertising
This post is about planning, not ad copy. Lawyer advertising is regulated by each state, and New Jersey's RPC 7.1 bars false or misleading communications, including statements likely to create an unjustified expectation about results. Have the firm's ethics counsel review ad text, landing pages and intake scripts before launch. See the rule text at New Jersey RPC 7.1.
Questions law firm owners ask
What is a normal sign rate for a law firm?
There is no number we can give you that would be honest. It varies by practice area, lead source and how intake is run. The tool gives no typical number either. Count your own signed clients and total leads for the same months, and use that.
Should I count every form submission as a lead?
Count the contacts you can actually work: calls, forms and messages that reach a person. Spam and wrong numbers do not belong in the count. Keep the two sets of numbers clearly labeled so the rate means what you think it means.
Can I use the calculator for several case types at once?
Run it once per case type. Fees, costs and sign rates differ, so a blended result hides the cases that carry the plan and the ones that drag it down.
What if my ad account says I got more leads than my intake log?
Trust the intake log for the sign rate, and treat the ad account as a count of actions, not people. One person can call twice, or fill out a form after calling. Our post on what your marketing actually brought in explains how to line the two up.
Does the plan tell me how many people are searching for my services?
No. The page says it does not show how many people want your service, and it "does not predict demand, calls or customers." It tells you what your own estimates add up to.
Check your own goal
Open the Customer Goal Calculator and enter the number of clients you want next quarter for your busiest practice area. If the plan looks out of reach, the next step is usually intake, not budget. We can walk through both with you. Talk with ThinkDMG or learn about our PPC advertising services.
