4-6 fields for top of funnel (name, email, phone, interest, timeline), 8-10 fields for deeper qualification landing pages. Under 4 kills quality; over 10 kills volume.
Tested benchmarks
- 4-6 fields: 14-22% conversion, mixed quality - 7-10 fields: 8-14% conversion, much higher SQL rate - 11+ fields: 3-6% conversion, excellent quality if intent is already high
Hybrid
Use a 4-field hero form + multi-step qualifier on the thank-you page for best of both.