How to Calculate Lead Leakage

Lead leakage can be calculated as the percentage of legitimate leads that fail because of the response process before they receive a fair sales outcome.

Define your denominator carefully — Start with legitimate sales inquiries, not every record labeled lead. Remove spam, duplicates, vendor requests, existing customer service contacts, and requests for work the company never performs.

Define leak events — Examples include no first response, response outside the target window, one contact attempt only, customer reply with no employee response, qualified lead not scheduled, canceled appointment with no recovery attempt, and records closed without a documented reason.

Calculate the basic rate — If 200 legitimate leads entered the business and 34 suffered one of the defined leak events, the observed leak rate is 17 percent.

Calculate by stage — Do not stop at one percentage. Maybe 8 percent leaked before contact, 4 percent during follow up, 3 percent during scheduling, and 2 percent after cancellation. Those stages point to different solutions.

Calculate by source and time — A 9 percent overall rate may hide a 28 percent after hours rate. Paid search may be handled well while marketplace leads sit. Segmenting reveals where the system breaks.

Lead leakage is most useful as a management metric when everyone agrees on what qualifies as a leak. Otherwise the number becomes a debate about definitions instead of a tool for improvement.