What is Cost per engagement (CPE)?
Cost per engagement is the total campaign spend divided by the number of engagements (likes, comments, shares, saves) generated, used to measure how efficiently a campaign drives audience interaction.
CPE is calculated as: total spend / total engagements. A $1,000 campaign that generates 5,000 engagements has a CPE of $0.20. Brands use CPE to compare creator performance across campaigns and tiers, independent of audience size.
Lower CPE is generally better, but context matters. A save or comment carries more weight than a like as a signal of intent. Brands running awareness campaigns might accept higher CPE if reach targets are met; conversion campaigns should tie CPE to downstream actions like clicks or purchases.
CPE varies heavily by niche and platform. Beauty and lifestyle content typically generates high engagement; B2B or finance content generates less but often with higher purchase intent. Normalize CPE comparisons within the same niche for accurate benchmarking.