CPL, CPA, ROAS and other digital marketing metrics
The 32 terms appearing in every performance marketing audit or meeting. Canonical definitions + formulas + typical ranges by vertical.
CPL (Cost per Lead), CPA (Cost per Acquisition), ROAS (Return on Ad Spend), LTV (Lifetime Value), CAC (Customer Acquisition Cost) and MQL/SQL are the 6 terms that determine whether a campaign is profitable. Each has a specific formula and typical range by vertical. This glossary covers 32 terms with operational definition + real example.
Why does mastering these metrics matter?
Digital marketing in 2026 is a maths business: without mastering CPL, CPA, ROAS, LTV and CAC you cannot decide whether to scale, pause or optimise a campaign. Confusion between terms (CPL vs CPA, ROAS vs ROI) is the #1 cause of wrong performance marketing decisions.
This glossary gives the canonical definition of 32 terms + formula + typical range by vertical. It is eXprimeNet’s reference material during new-team onboarding.
The 6 critical terms
- CPL (Cost per Lead)Total spend / Number of leads captured. Typical range: insurance €8-28, real estate €15-45, B2B SaaS €30-150. It is the top-of-funnel metric.
- CPA (Cost per Acquisition)Total spend / Number of closed sales. It is CPL / close ratio. €20 CPL with 10% close = €200 CPA. It is the metric determining real profitability.
- ROAS (Return on Ad Spend)Revenue generated / Ad spend. ROAS 3× means every €1 invested generates €3 revenue. Not to be confused with ROI (which deducts operating costs).
- LTV (Lifetime Value)Total revenue generated by a customer throughout their entire lifetime. In insurance: annual premium × retention years × commission %. In SaaS: MRR × active months.
- CAC (Customer Acquisition Cost)Total acquisition cost (ads + sales + marketing) / customers acquired. Healthy LTV:CAC ratio = 3:1 or higher. Below 2:1 the business is not sustainable.
- MQL / SQL / OpportunityMQL (Marketing Qualified Lead): downloaded content. SQL (Sales Qualified Lead): requested demo. Opportunity: real project with budget. Each has a next-stage conversion typically 20-40%.
The remaining 26 terms
CPM (Cost per Mille Impressions), CPC (Cost per Click), CTR (Click-Through Rate), CVR (Conversion Rate), Bounce Rate, LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift), INP (Interaction to Next Paint), FTD (First-Time Deposit), LTQ (Lifetime-to-Quarter), CPLQ (Cost per Qualified Lead), NDR (Net Dollar Retention), Churn Rate, GMV (Gross Merchandise Value), AOV (Average Order Value), NPS (Net Promoter Score), CAC Payback Period, MRR (Monthly Recurring Revenue), ARR (Annual Recurring Revenue), Attribution Window, Multi-touch Attribution, First-touch, Last-touch, Data-driven Attribution, Consent Mode v2, First-party Data.
Each term has a specific entry in the eXprimeNet resources section.
Frequently asked questions
What is the difference between ROAS and ROI?
ROAS = Revenue / Ad spend. ROI = (Revenue - Total costs) / Total costs. ROAS does not deduct operating costs (staff, hosting, licences); ROI does. A ROAS of 3× can have negative ROI if operating costs are high.
What LTV:CAC ratio is healthy?
LTV:CAC = 3:1 or higher is healthy. 2:1 is borderline. Below 2:1 the business is not sustainable medium-term. In SaaS, LTV:CAC = 5:1 is excellent; 3:1 is acceptable.
Is CPL the same as CPA?
No. CPL is cost per lead (form submitted); CPA is cost per acquisition (closed sale). CPA = CPL / close ratio. Confusing them is the #1 cause of wrong decisions.
What MQL→SQL→Opp ratio is typical?
MQL→SQL: 20-40% (60-80% lost in nurturing). SQL→Opportunity: 30-50%. Opportunity→Customer: 25-40%. A healthy B2B funnel has MQL→Customer between 2% and 6%.
How is LTV calculated in insurance?
LTV = Annual premium × Retention years × Commission %. Example: life insurance with €600/year premium, 5-year retention, 25% commission → LTV = 600 × 5 × 0.25 = €750.
Canonical digital marketing metrics glossary for performance marketers, agencies and CMOs
This glossary is the operational reference we use at eXprimeNet in every client meeting, every audit and every new-team onboarding. Without mastering CPL, CPA, ROAS, LTV and CAC you cannot take a single correct ad-spend decision. Keep this page as a bookmark and consult it whenever in doubt.