Industry benchmarks for LegalTech SaaS
LegalTech tolerates a longer payback than most SaaS, with 14 months being a healthy target and up to 20 acceptable given very low churn. CAC runs $3,000 to $9,000 per firm, driven by long evaluation cycles, bar association and conference marketing, and the reality that partners buy slowly and by consensus. ARPU sits at $300 to $800 per month on per-seat pricing at 76 to 85 percent margin, with monthly churn of 1 to 2 percent reflecting how painful it is to migrate matter data. At $5,500 CAC and $384 in monthly gross profit, payback is 14.3 months.
Seat expansion inside the firm is the LTV lever, since firms typically start with one practice group and spread laterally over 12 to 24 months. Workflow lock-in compounds this: every matter, document, and time entry stored in your system raises the switching cost, which is why onboarding depth predicts multi-year retention better than any feature. Trust and compliance are prerequisites rather than differentiators, so security review readiness directly affects sales cycle length and therefore CAC. Because lifetimes are long, cap LTV at 48 to 60 months rather than dividing by a 1.5 percent churn rate that implies a 5 and a half year average.
Frequently asked questions
CAC Payback Estimator for LegalTech SaaS, answered.
Why is a 14 month payback acceptable here?
Because churn is 1 to 2 percent monthly, so the average firm stays 4 to 7 years. Long lifetimes justify longer payback as long as you can fund the working capital gap.
What drives LegalTech CAC higher than horizontal SaaS?
Consensus buying among partners, long procurement and security review, and narrow addressable markets that force expensive niche channels like bar associations and legal conferences.
How should I model per-seat expansion in LTV?
Use net revenue retention rather than a static ARPU. If firms grow from 4 to 9 seats over three years, static ARPU understates LTV by more than half.