Three scenarios for your legal compliance SaaS, all ugly.
Optimistic scenario. CAC $60 via content marketing to indie founder communities (r/entrepreneur, Indie Hackers), ARPU $32, retention 12 months → LTV $384, LTV/CAC = 6.4. You hit 200 paying customers by month 6, $76k ARR run rate.
Realistic scenario. CAC $95 (compliance is low-urgency purchase, long consideration cycle), ARPU $29, retention 7 months → LTV $203, LTV/CAC = 2.1. Payback 11 months, not your target 8. You struggle to hit 80 customers by month 6, $28k ARR.
Pessimistic scenario. CAC $140 (legal fears drive customers to real lawyers despite cost), retention 4 months → LTV $116, LTV/CAC = 0.83. Burning cash on every customer acquired.
The core problem: your target CAC of ~$77 (to hit 3:1 LTV/CAC with 8-month payback) is unrealistic for B2B legal software. SMB legal buyers are paranoid and risk-averse — they'll spend $1,200 for one lawyer consultation over $29/month for AI that might miss something critical.
Your freemium model compounds this. Two free analyses per month covers most indie founders' needs quarterly. Why pay $29 monthly for sporadic use? Plus legal document analysis requires massive compliance overhead in the US — one wrong suggestion and you're facing E&O liability that kills your $50k budget instantly.
Key sensitivities: Professional liability insurance will cost $8-12k annually minimum. False negative on GDPR compliance = potential customer lawsuit. Competition from actual lawyers offering fixed-fee compliance packages at $500-800 (still cheaper than 2+ years of your subscription).
Bottom line: at 3 months runway and zero customers, this unit economics model is a 18+ month journey to break-even, not a validation sprint.