Funnel
tofu
Benchmark
NA - This can not be generally answered as this highly depends on market, language, platform & industry. Everything at $4 and below is great. $6-7 is when we start to optimize but it's still okay. The range of $8-10 per lead hurts but our funnel can operate at a profit if optimized well. At $10+ it's usually not profitable anymore
Solution
Try new creatives, ad copy, and targeting. Optimize landing page conversion rate. If you can not make it workout on one platform, switch platform (for example from Facebook to YouTube). If PPC as a channel is not working out, switch channel - for example produce content for organic traffic etc