The only meaningful answer: comfortably below YOUR break-even — price × margin × close rate. A $200 CPL is fantastic for a roofer ($10k jobs) and ruinous for a $40/session dog groomer; anyone quoting a universal 'good CPL' is guessing.
For calibration only: LocaliQ's published U.S. search-advertising benchmarks (updated June 2026) put the business-services average around $94 per lead, with wide industry spread. Treat published averages as sanity checks, never targets.
Our planning rule, and the reasoning: aim for half your break-even. The buffer absorbs no-shows, unclosable leads, and being wrong about your close rate — at break-even you're working for free.