Lead ScoringMQL vs SQL: definitions, the handoff between them, and why the numbers disagree
An MQL is a lead marketing has judged ready for sales; an SQL is one sales has checked and kept. This guide defines MQL, SAL, SQL and SQO, sets out the handoff and the SLA that governs it, shows how to calculate the MQL to SQL conversion rate, and explains why marketing's MQL count and sales' count rarely agree, with a reconciliation that took one team from 662 unexplained leads to 63.
RevSure Team·Oct 20, 2026·10 min read
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