Marketing Qualified Lead (MQL)
Marketing FundamentalsA marketing qualified lead is a lead that marketing has decided is worth sales' attention. The qualification combines fit (does the lead match the ICP) with engagement (have they shown enough buying signal). The MQL definition is one of the most important shared agreements between marketing and sales, and one of the most often disputed.
The term emerged in the late 2000s as B2B SaaS funnels formalized. It has since been criticized for over-emphasizing the lead count and under-emphasizing the pipeline outcome, and many modern teams have shifted to revenue-stage definitions ("sales-accepted lead," "pipeline-qualified opportunity") that focus on the deal rather than the contact.
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Key takeaways
- An MQL is defined by criteria, not gut feel. Fit (firmographics, role) plus engagement (lead score above threshold) plus a defined trigger (e.g., demo request, pricing-page visit).
- Median MQL-to-SQL conversion is 13%. Programs above 25% have tight criteria; programs below 5% are mislabelling raw leads as MQLs.
- MQL volume without MQL quality wastes sales time. Healthy teams measure MQL-to-pipeline conversion, not MQL count.
What is a marketing qualified lead?
An MQL is a lead that has met the criteria marketing and sales jointly agreed on as worth sales' time. The criteria typically combine three things:
- Fit: company matches the ICP (industry, size, geography), and the role matches a relevant persona.
- Engagement: the lead has crossed a defined threshold of interaction (lead score above 75, demo request, pricing-page visit, free trial signup).
- Recency: the engagement is recent (typically last 30 to 60 days). Old engagement does not count.
The criteria are jointly owned. Marketing alone defining the MQL produces leads sales does not work; sales alone defining it produces a definition so narrow that most leads never qualify. The healthy practice is a quarterly review with both teams looking at MQL-to-SQL and MQL-to-pipeline conversion data.
MQL vs SQL vs other lead stages
Modern B2B funnels typically use four lead stages:
- Lead: any contact in the system. Low qualification.
- MQL (Marketing Qualified Lead): meets fit and engagement criteria.
- SAL (Sales Accepted Lead): MQL that sales has reviewed and accepted as worth pursuing. Some teams skip this stage.
- SQL (Sales Qualified Lead): SAL that sales has actively engaged and confirmed has budget, authority, need, and timeline (or some equivalent qualification framework).
The MQL-to-SQL transition is where most B2B funnels leak. Median conversion is around 13% per HubSpot's research, with strong programs at 25% or higher. Conversion below 5% suggests the MQL criteria are too loose; conversion above 40% suggests the criteria are too strict and qualified leads are being missed.
How do you define an MQL?
Five steps:
- 1.Pull historical data. Look at the last 12 months of closed-won deals. Trace each one back to the lead's first attributes and behaviours.
- 2.Identify the common attributes. Industry, company size, role, lead source, behaviour signals that recur across most closed-won deals.
- 3.Translate into rules. "Company size over 50 employees, role contains marketing or sales leadership, lead score over 75 in the last 30 days."
- 4.Set thresholds with sales. Run the criteria against historical leads to estimate volume. If the criteria produce 5,000 MQLs per month and sales has 6 BDRs, the criteria are too loose. If they produce 12 MQLs per month, they are too tight.
- 5.Document and instrument. Codify the definition in the CRM, automate the qualification step, and report MQL-to-SQL and MQL-to-pipeline conversion monthly.
The definition is not permanent. Re-tune quarterly. A definition unchanged for 12 months is reliably worse than the original because the buyer and product have shifted.
Common MQL mistakes
Three patterns:
- Reporting MQL count as the primary marketing KPI. MQL count without MQL-to-pipeline conversion is volume optimization. Teams judged on it produce more MQLs of declining quality until sales stops working them.
- One MQL definition for all segments. Enterprise MQL criteria are different from SMB; mixing them into one definition averages two different problems.
- No service-level agreement on response. Sales accepting MQLs with no commitment on response time produces leads that go cold within hours. Most healthy programs commit to first sales touch within 5 minutes for high-priority MQLs and within 24 hours for standard ones.
The healthy practice is to treat MQL as one stage in a longer pipeline, judged by the deals it produces rather than the volume that enters it.
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Frequently asked questions
What's the difference between an MQL and a lead?
A lead is any captured contact. An MQL is a lead that has been qualified by marketing as worth sales' attention based on fit (matches ICP) and engagement (sufficient buying signal). Every MQL is a lead; not every lead is an MQL.
Should every MQL be handed to a salesperson?
Yes, but the type of handoff varies. High-priority MQLs (clear ICP fit, strong intent signals) get a direct BDR or AE touch within hours. Lower-priority MQLs route to a high-velocity team or an automated nurture sequence. The handoff is not always a phone call.
What's a healthy MQL-to-SQL conversion rate?
Median is around 13% across B2B SaaS, per HubSpot. Strong programs convert 25% or more. Below 5% suggests the MQL criteria are too loose. Above 40% suggests the criteria are too strict and viable leads are being missed.