Marketers who spend more than 50% of their lead generation budget on inbound marketing channels report a significantly lower cost per sales lead than those who spend 50% or more their budgets on outbound marketing channels.

The average cost per lead by inbound marketing-dominated firms in 2010 is $134. This is $198, or 60%, less than the $332 average cost per lead at outbound marketing-dominated firms. This percentage differential has remained consistent from a 61% higher average lead generation expense reported by outbound-marketing-dominated firms in 2009.