MQL vs SQL: Who Owns the Gap Between Interest and a Sale?
A download is not a buying decision. Clarify what makes a lead worth following up, when sales should take over, and who keeps the conversation moving in between.
Marketing chases attention. Sales chases revenue. The argument between them often breaks out at the same spot in the funnel: the part no one has been made responsible for.
Most founders I work with can describe the symptom before I’ve finished asking. Marketing’s had a good month: leads up, cost-per-lead down, dashboard green. Sales says the leads are rubbish. They’re both looking at the same pipeline and they’re both sure they’re right.
More often than not, they both are. The leads marketing is proud of and the leads sales is dismissing are frequently the same leads, seen from opposite ends of a gap that neither team has been told to mind.
A marketing-qualified lead, or MQL, is generally a contact showing enough interest to merit further attention. A sales-qualified lead, or SQL, is generally a contact sales agrees is ready for a buying conversation. The useful work is agreeing what those definitions mean in your business, together.
What changes the conversation is a shared definition of MQL and SQL, a workable handover and clear ownership of the space between them.
A practical model for the space between MQL and SQL
I use a simple three-zone model to make the handover visible: intake, where strangers first become known to you; engagement, where known contacts decide whether they are in the market; and close, where a deal becomes real. It is my practical lens for seeing the space no one has named.
In this model, MQL is the door into engagement: a signal that a contact is worth following up. The threshold should be agreed by marketing and sales, based on the business, offer and market.
In this model, SQL is the handover into an active sales conversation. A contact may earn it through buyer behaviour, fit, timing or other agreed signals rather than by a score alone.
Treat them as labels and the space between the two doors can vanish from view, so no one is responsible for it. Treat them as doors and that space becomes a real part of the business: the distance between ‘worth a conversation’ and ‘ready to buy.’ Marketing may believe its job ended at the first door. Sales may believe its job starts at the second. The space in between needs an owner.
Why “just nurture them” doesn’t fix it
One common response to the middle space is a nurture sequence. Well-designed automation can help, but it should not replace judgement. Different leads may need different timing, context and conversations, so the process needs a way to respond to what people are actually doing.
The middle space may benefit from scoring, automation, human judgement and clear ownership working together. Different leads may need different timing, context and conversations, so the process should make room for both consistent follow-up and informed decisions.
One of the most valuable stretches of your pipeline may be the one no one has been made responsible for.
What this means if you’re the one carrying it
When marketing and sales disagree on lead quality, examine the definitions, scoring, handover context, automation and ownership. These elements can reinforce one another rather than being treated as a personality or motivation issue.
I built Icon Visual Marketing to approximately $10 million in revenue and a team approaching 50 people before its sale in 2023. Across my career, I have worked with many hundreds of clients, businesses and founders and seen this argument repeat. It is often less about effort than a seam in the business that has not been clearly named and owned.
Three questions to review in your own business:
1. If you asked your head of marketing and your head of sales to each write down, on their own, what makes a lead an SQL — would the two answers match?
2. Who, by name, owns a lead while it sits between “captured” and “ready to buy”?
3. When a lead goes quiet, does anyone notice, or does it just sit in the CRM going cold?
If those questions do not have clear answers, the middle space deserves attention. It may need a clearer definition, better context at handover, automation that supports follow-up, or more human judgement where the signal is ambiguous.
Further reading: Sales and Marketing Alignment and Should You Fire Your Marketing Agency?.
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