Why you should run this math
Most law firms have never run this calculation. They look at marketing spend ROI and see “we got 100 leads for $4,000, that’s $40 per lead, that’s fine.” But $40 per lead means nothing if you’re losing 60% of those leads to voicemail and no-shows. The real cost-per-retained-client is often 3–5× higher than the surface metric implies.
This guide walks through the math so you can run it on your own firm. The full interactive calculator lives at the same URL and updates in real time as you change inputs — but the formulas below give you everything you need to do it on paper.
The five inputs you need
Best estimates are fine. Refining these numbers later doesn’t change the order-of-magnitude answer.
- Average case value (USD). Personal injury: $5,000–25,000. Family law: $2,500–10,000. Estate: $1,500–4,000. Criminal defense: $3,000–15,000. Immigration: $2,000–8,000.
- New leads per month. Total inbound leads — calls, form submissions, and chat inquiries combined. Don’t only count “qualified” leads; count everyone who tried to reach you.
- Percent of calls missed (after-hours / busy). Industry average is 35–60% for firms without 24/7 coverage. If you don’t know yours, default to 40%.
- Percent no-show rate on consultations. Industry average is 20–35%. If you don’t know yours, default to 25%.
- Percent of consultations that sign retainer. Industry average is 25–40%. If you don’t know yours, default to 30%.
How the math works
Straightforward arithmetic, no smoke and mirrors:
- Lost leads = monthly leads × missed-call rate. These are people who tried to reach you but couldn’t.
- Effective consultations booked = (leads − lost leads) × consult booking rate (assumed 80% of reached leads book).
- No-shows = consultations × no-show rate. These were booked, but never showed.
- Actual retainers signed = (consultations − no-shows) × close rate.
- Theoretical retainers possible = total leads × consult booking rate × 90% show rate × close rate. (What’s possible if you captured everything.)
- Lost revenue = (theoretical retainers − actual retainers) × average case value.
A worked example
A typical PI firm running:
- Average case value: $3,500
- Leads per month: 100
- Missed-call rate: 40%
- No-show rate: 25%
- Close rate: 30%
Plugging in:
- Lost leads: 100 × 40% = 40 leads/month never reach a human
- Reached leads: 60
- Consultations booked: 60 × 80% = 48
- No-shows: 48 × 25% = 12
- Actual consultations completed: 36
- Actual retainers signed: 36 × 30% = ~11
- Theoretical retainers (if you captured everything): 100 × 80% × 90% × 30% = ~22
- Gap: 11 retainers/month
- Lost monthly revenue: 11 × $3,500 = ~$38,500/month
That’s $462,000/year of recoverable revenue from a single mid-sized PI firm.
Why this number is usually shocking
Most firms see this output and immediately push back: “Surely we’d notice if we were losing $40,000/month?” But the loss is invisible by design — you don’t get a notification when a prospect hangs up after the third ring at 9pm. You don’t see the no-show until the calendar time passes. The leakage looks like normal operations because everyone’s busy.
The reason the calculator shows numbers people refuse to believe at first: most firms haven’t ever drawn a line between “leads in” and “retainers out.” They just look at the output side (“we signed 11 retainers this month, that’s about normal”) and never measure the input side (“100 leads should have produced 22 retainers, where did the other 11 go?”).
What our snapshot recovers
- After-hours capture: AI receptionist answers 24/7. Typically recovers 75–90% of missed calls.
- No-show recovery: AI calls within 60 minutes of a missed appointment. 70% of no-shows reschedule.
- Lead nurture: 10-day email + SMS + AI call sequence converts an additional 8–15% of “cold” leads.
- Smart reminders: 24h, 1h, 15min reminder cascade cuts initial no-show rate by 50–60%.
For the worked example above, a typical recovery is:
- After-hours capture brings the missed-call rate from 40% to 5%
- Smart reminders bring no-show rate from 25% to 10%
- Result: 100 × 95% × 80% × 90% × 30% = ~20 retainers/month vs the original 11
That’s 9 additional retainers/month × $3,500 = $31,500/month recovered. The snapshot ($997 one-time + $497/month GHL) pays for itself in the first week of operation.
If the number above is $30,000+
If the calculator shows you’re losing $30,000+ per month, the snapshot pays for itself on a single recovered case. The math is heavily lopsided in favor of fixing the leak.
Book a demo and we’ll walk through the calculator with your firm’s actual numbers, or grab the snapshot and start recovering missed leads within 24 hours of install.