Cost per lead is the most durable bad metric in B2B marketing. It survives because it is easy to calculate, easy to benchmark, and easy to improve. It is also an efficiency measure of an output that fewer than 1 percent of the time becomes revenue.
Optimizing cost per lead reliably produces more of the cheapest leads, which are almost always the least qualified. Every demand gen leader knows this. Most still report the number, because the alternative has never been clearly specified.
The alternative that has emerged across serious demand gen teams is intent-to-opportunity velocity: the average elapsed time from an identified high-intent signal to the creation of a qualified sales opportunity in that account.
Why velocity is the right primary measure
Velocity is a compound metric. It cannot improve unless several things are working simultaneously.
Signal quality has to be good, or you are timing from noise. Routing and response processes have to be fast, or elapsed time inflates regardless of marketing performance. Content has to be available for the stage the account is actually in. Sales and marketing handoff has to function.
A single number that only moves when the whole system improves is a far better primary metric than one that can be gamed by changing a bid.
It also has a direct commercial reading. Shorter intent-to-opportunity time means more shots on goal per period from the same account base, and it means arriving earlier in the shortlist formation window, which is where the outcome is actually determined.
