Legal is one of the few niches where you genuinely can't do rev share, so price off case value instead. For criminal defence and PI, a signed case is worth thousands to tens of thousands, so a per-qualified-consultation or per-signed-case fee is easy to justify. How I'd structure it: 1. Setup fee, 1,000 to 2,500, covers the build, A2P registration, list clean, prompt and the first campaign. Never do the build free. 2. Then either a flat monthly retainer, or a per-booked-consultation fee. Retainer is simpler to get approved by their compliance and easier for you to forecast. 3. Make them pay the usage directly, or build it in with headroom. A 2,000 lead campaign runs about 130 in SMS, so price well above that. Two practical points. Old PI and criminal leads need consent checking before you text them, and the firm must confirm they have it, in writing. Also keep the AI off anything that reads as legal advice or a case outcome promise, that is a bar rule problem for them, not just a conversion one. Ask them for their average case value on the first call, every number above hangs off it.