Newsletter sponsorship CPM calculator
Calculate what to charge per sponsored send — and what the sponsor is paying per open. Enter CPM or rate per send and the other updates automatically.
Enter your subscriber count, open rate, and either a CPM rate or a desired rate per send. Both fields update each other. Add sends per month to see monthly revenue potential.
Newsletter sponsorship CPM calculator inputs and results
Your newsletter
Total active subscribers on your list.
Your 30-day or campaign-average open rate. Industry average is roughly 35–45%.
What you charge per 1,000 opens. Change this to calculate rate per send.
General ~$20–30 · B2B ~$40–80 · Finance ~$80–150
What you charge for one sponsored placement. Change this to calculate the implied CPM.
Sponsorship economics
Opens per send
4,200
people read each send
Rate per send
$210
per sponsored placement
How newsletter CPM pricing works
Opens per send = subscribers × open rate. Rate per send = opens per send ÷ 1,000 × CPM. So a newsletter with 10,000 subscribers and a 42% open rate reaches 4,200 people per send. At a $50 CPM, that's 4.2 × $50 = $210 per sponsored placement.
The reverse calculation — finding the implied CPM from a given rate — divides the rate by opens and multiplies by 1,000. This is useful when a sponsor proposes a flat fee and you want to check whether it's above or below your usual CPM.
Cost per open is rate ÷ opens. From the sponsor's perspective, this is what they're paying to reach one person who actually opened the email — typically $0.03–0.15 for a well-priced newsletter, compared to $0.30–1.00+ for equivalent programmatic display impressions. The value proposition to sponsors is higher intent and less ad blindness in email vs. display, which is why newsletter CPMs can be high in absolute terms while still representing good ROI for the advertiser.
About this tool
This tool calculates newsletter sponsorship rates using a CPM (cost per thousand opens) model, with the CPM and rate-per-send fields updating each other in real time. Inputs: subscriber count, average open rate %, CPM rate (in dollars per 1,000 opens), and sends per month. Outputs: opens per send, rate per sponsored send, effective cost per open for the sponsor, and monthly revenue potential. Enter either the CPM or the desired rate per send — the other updates automatically.
Frequently asked questions
What CPM should I use for my newsletter?
Newsletter sponsorship CPMs vary widely by niche and audience quality. General interest newsletters often start around $20–30 CPM on opens. Business and B2B newsletters typically command $40–80 CPM. Finance, investing, and professional niche newsletters can reach $80–150+ CPM. These figures are per 1,000 opens, not per 1,000 subscribers — open rate is factored into the pricing because sponsors care about actual eyeballs, not list size. Your rate should also reflect the warmth and specificity of your audience relative to others in your niche.
Should I price on opens or on subscribers?
Pricing on opens is increasingly standard because it reflects actual reach more accurately than subscriber count. A 50,000-subscriber list with 20% open rate reaches 10,000 people per send — the same effective reach as a 25,000-subscriber list with 40% open rates. Pricing on subscribers without accounting for open rate means low-engagement lists are overpriced and high-engagement lists are underpriced. Some newsletters price on delivered (not bounced), which sits between opens and subscribers — but opens-based CPM is the most honest metric.
What counts as one sponsorship slot?
It depends on your format. A solo send (the entire email is the sponsor's content) commands the highest rate. A primary placement (first mention, typically above the fold or in the lead section) is the most common format and what this calculator prices. A secondary or mid-letter mention typically sells at 40–60% of the primary placement rate. Classifieds or brief shoutouts at the bottom might sell for 20–30% of the primary rate. Price each placement type separately, or build tiered packages.
How do I increase my CPM?
The two main levers are audience quality and niche specificity. Newsletters with very targeted audiences — a specific industry, profession, or interest — command higher CPMs because sponsors can reach exactly the right people without waste. Segmentation (sending to a sub-list that matches the sponsor's target profile) can also justify higher CPMs. Testimonials and case studies from previous sponsors showing click-through or conversion results dramatically strengthen your position when negotiating rates.
What if I want to price based on total list size, not opens?
Set the open rate to 100%. The calculator will then compute rates on the full subscriber count rather than on opens. This effectively converts to a subscriber-based CPM. Note that most experienced sponsors will push back on subscriber-based pricing unless your open rate is strong — they know a 15% open rate on 100,000 subscribers means 85,000 people never saw their ad.