Sponsor rate (flat)
--
Free · Instant · No signup
Newsletter Sponsorship Rate Calculator
Opens = list x open rate. Rate = opens / 1000 x CPM. This is a flat sponsor invoice for one issue, not Substack or Beehiiv taking 10% of paid subs.
Page updated 2026-09-14.
Calculator
Calculated Results
Estimated opens
--
What the Newsletter Sponsorship Rate Calculator calculates
Flat sponsor rate = opens / 1000 x CPM. Issue sponsorship, not Substack 10% paid-sub take-rate Enter one realistic scenario in the calculator above and read the result together with its labels and assumptions. The page is designed for a quick, repeatable estimate rather than a black-box answer.
This is a browser-side worksheet for social planning. It does not connect to the named provider, submit a transaction, or create an account on your behalf. Save the inputs if you need an audit trail, then rerun the page when an assumption changes.
Inputs, formula, and assumptions
Use the field labels as the source of truth: enter rates as percentages, amounts in the selected currency, and dates in the format shown. Invalid or incomplete inputs should remain visible so you can correct them before copying a result.
The calculator applies the formula implied by the labels and shows the key output in plain language. Displayed values are rounded for reading; keep the copied inputs and unrounded assumptions when a later calculation needs more precision.
If the result depends on a provider rule, jurisdiction, or changing market input, verify that assumption with the current official documentation before relying on it.
How to use the result responsibly
For the next step, compare this result with Substack / Beehiiv Newsletter Revenue Calculator, Influencer Sponsored Post Rate Estimator, Ad CPM / CPC / CTR Interconvertible Calculator. A second calculator is useful when you need to test a different assumption, not to manufacture false precision.
Results are estimates, not a quote, diagnosis, tax filing, legal opinion, investment recommendation, or guarantee. Check the jurisdiction, provider plan, time period, and rounding rules that apply to your real situation.
Inputs stay in your browser for this page. Do not paste passwords, payment credentials, private keys, or other secrets into any public web tool, even when the page is designed to run locally.
Frequently Asked Questions (FAQ)
What does the Newsletter Sponsorship Rate Calculator calculate?
It estimates flat sponsor rate = opens / 1000 x CPM. Issue sponsorship, not Substack 10% paid-sub take-rate from the values you enter. Review the labels and assumptions above the result so you can tell exactly what is included.
Are these live quotes or guaranteed results?
No. The page is an in-browser estimate based on your inputs. Provider pricing, taxes, policies, exchange rates, and other external conditions can change, so confirm the live value before committing money or publishing a decision.
Are my inputs uploaded?
The calculator is designed to run in your browser and does not need an account or a server upload. Avoid entering credentials, payment details, private keys, or other secrets in any public tool.
What should I verify before using the result?
Verify the current provider rule, jurisdiction, time period, and formula inputs that apply to your situation. Treat the output as a planning estimate rather than a final decision.
You might also need
-
Substack / Beehiiv Newsletter Revenue Calculator Paid-sub and sponsor revenue after platform take-rate on a newsletter list. -
Influencer Sponsored Post Rate Estimator A planning rate from followers, engagement, niche CPM, and usage-rights multiplier. -
Ad CPM / CPC / CTR Interconvertible Calculator Convert among CPM, CPC, and CTR when any two of the three (or spend and outcomes) are known. -
Email Newsletter Read Time & Word Count Estimator Word count and read minutes at a chosen words-per-minute for a newsletter body.