Pipeline leakage is demand you already paid for that quietly falls out of the funnel — not because the buyer said no, but because a process failed. A lead that never got routed, a deal stuck between two systems, a follow-up that never happened. The intent was there; the machinery lost it.
How it happens
Leakage almost never looks like a leak. It looks like a slightly-worse conversion rate, a forecast that keeps missing, a marketing team and a sales team each convinced the other is the problem. The loss is real but diffuse, spread across handoffs where no single owner is watching.
The classic site is the handoff itself — the moment a lead moves from marketing’s system to sales’ queue, or from an SDR to an AE. Every ownership change is a place where something can go unassigned, unactioned, or unmeasured.
Why it matters
Leakage is the cheapest pipeline you’ll ever recover. You’ve already spent the acquisition cost; the lead exists; the buyer was interested. Fixing the process that lost them costs a fraction of generating new demand to replace them.
In one lifecycle I reviewed, a single unrouted segment — leads from a specific form that matched no routing rule — had been dropping roughly forty enquiries a month into an unassigned queue nobody checked. No one had reported a problem, because the leads simply never appeared anywhere anyone looked.
The common mistake
Teams treat missed numbers as a demand problem and buy more traffic. If your funnel leaks, more volume just means more expensive leakage. The first move is to find where the existing demand is falling out, not to pour more in.
Related reading
If this was useful, see seven signs your handoff is leaking pipeline and how much pipeline actually leaks in B2B SaaS.
If you suspect you’re leaking, a free 30-minute pipeline health check will tell you where.