CPM

CPM (cost per mille, where mille = Latin for thousand) is the price an advertiser pays per 1,000 ad impressions. It is the most common pricing model for newsletter advertising. CPM = (Total Spend ÷ Total Impressions) × 1,000. For example, if an advertiser spends $500 and gets 100,000 impressions, the CPM is $5. In newsletter advertising, CPMs vary significantly by audience: general-interest newsletters typically command $2–$6, while B2B, finance, and developer newsletters regularly see $10–$30+ CPM. Direct-sold deals (negotiated between publisher and advertiser) typically achieve higher CPMs than programmatic demand. CPM is the primary commercial metric in newsletter advertising — contrast with CPC (cost per click) and flat-fee sponsorships.