Revenue per subscriber
Revenue over a stated period divided by a defined subscriber count, used to compare monetization consistently.
Revenue per subscriber divides a stated revenue total by a stated subscriber count. Define whether revenue means paid subscriptions, sponsorships, or tracked purchases, and whether the denominator is total, active, paying, or average subscribers during the period.
If a publication records $600 in subscription revenue during a month and averages 300 paying subscribers, that calculation gives $2 per paying subscriber for the month. Dividing by all free and paid subscribers answers a different question.
This ratio is not profit, lifetime value, or proof that email caused a purchase. Account for refunds and fees consistently when relevant, keep the period comparable, and avoid including unrelated business revenue without explaining the scope.
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