Newsletter Sponsorship Rate Calculator

Sell on opens, not on list size. The honest unit of a newsletter sponsorship is an opened email, because that is the only moment the sponsor's message is in front of a reader. Subscribers times open rate gives expected opens; expected opens times a CPM gives a price. A 25,000-subscriber list with a 42 percent open rate delivers about 10,500 opens per send, and at a $50 CPM that placement is worth around $525. The same arithmetic, run backwards, turns any quote into the CPM a buyer is really paying.

For publishers, this is the calculator behind the media kit. Behind the CMO prices its own placements this way: the rate is a function of engaged readers, not raw subscribers, and it moves as the list and the open rate move. Typical B2B newsletter CPMs are quoted across a wide range, from roughly $30 for broad audiences to well over $100 for niche executive readers who cannot be reached cheaply anywhere else. Those are rough figures that vary a great deal by audience, format, and exclusivity, not a rate card.

For sponsors, the effective CPM is the starting point and the effective cost per click is the finish line. Ask the publisher for the click rate previous sponsors saw, enter it, and compare the resulting CPC with what the same audience costs on LinkedIn or through paid search. A high CPM on a newsletter that a decision-maker opens on purpose often produces a cheaper qualified click than a low CPM on a feed they scroll past.