The deliverable
A sponsorship is not a display ad. It is a labelled block of text (sometimes with an image) inside a scheduled issue. The most common shape is a primary block near the top: 60–120 words plus a link and a call to action. Some operators offer a secondary mention lower in the issue for 50–60% of the primary price.
The newsletter operator almost always writes the copy from a short brief supplied by the sponsor. Sponsor-written copy tends to underperform because it does not match the newsletter's voice — a mismatch readers detect in one line.
The timeline
First contact to signed deal: 2–7 days for indie newsletters, 2–6 weeks for larger publications with sales teams. Brief-to-send is typically 5–10 business days: the operator writes copy, the sponsor approves in one round of edits, the operator schedules the send.
Reporting lands 24–72 hours after the send. Standard metrics are opens on the issue, clicks on the sponsor's link, and any tracked conversion the sponsor asks for (a UTM-tagged sign-up, a coupon code, an inbound reply).
The pricing model
Most independent newsletters price on CPM (cost per 1,000 opens), quoted per placement, invoiced net-14 or net-30 after the send. Larger publications and B2B lists more often quote flat rates per placement or per package (e.g. three placements over 30 days).
Performance pricing (CPC, CPA, revenue share) is rare in newsletters because attribution is unreliable — sponsors typically pay for the send and measure attribution themselves.
The paperwork
For most deals under $2,000, the paperwork is: an emailed order confirmation, an invoice, and the results email. No signed contract. For larger deals, a one-page insertion order is standard — it captures dates, placement, price, cancellation window, and payment terms.
The most useful cancellation clause: sponsors can cancel up to 5 business days before the send for a full refund; inside 5 days, the fee is non-refundable but rescheduling is free.