Term
CPL (Cost per Lead)
Advertising KPI: cost per generated lead. Standard efficiency metric for B2B and service marketing where the conversion is an inquiry rather than a purchase.
CPL (Cost per Lead) — in more detail
CPL stands for “Cost per Lead” — the CPA special case where the conversion is a qualified contact: form fill, demo request, whitepaper download, phone call. Formula: total cost ÷ leads. CPL only becomes meaningful in conjunction with lead quality: €100 per MQL can be brilliant or terrible depending on whether sales closes 50 % or 5 %. Mature B2B setups therefore work with cascading KPIs: CPL → CPMQL → CPSQL → CAC. Without this chain, Smart Bidding optimizes for cheap, often weak leads.
Example / In practice
A LinkedIn and Google Search campaign for a SaaS brings in 400 leads at €32,000 spend → CPL €80. 30 % become MQLs (CPMQL €267), 25 % of MQLs become opportunities, 30 % of opportunities become deals — yielding 9 deals at €12,000 ARR each.
Distinction from similar terms
CPA is the umbrella term (any conversion). CPO is the e-commerce equivalent. CAC (Customer Acquisition Cost) counts not the lead but the actually won customer — in a lead-gen pipeline, CPL is only the first stage.
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CPA (Cost per Acquisition)
Advertising KPI: average cost per conversion. Central efficiency metric for lead gen and performance marketing, and the steering input for tCPA bidding.
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