Contact us
Questions, corrections, suggestions, or partnership ideas — we read every email.
Email us directly
Drop us a line at the address below. We aim to reply within two business days.
contactus@marginvsmarkup.comClicking opens your default email app. If that doesn't work, copy the address above and email us from any client.
What to write about
- Calculator bugs or wrong results. Include the inputs you used and what you expected.
- Outdated platform fees. Stripe, PayPal, Amazon, and others change pricing periodically. Tell us what changed and we'll update.
- Content corrections. If a blog article has an error, point to the paragraph and what's wrong.
- Feature suggestions. What would make this site more useful for your work? We prioritize requests that come up repeatedly.
- Embed widget questions. Help with the iframe code, styling, or self-hosting.
- Partnerships or links. If you maintain a related tool or write about pricing, we're open to collaborations.
- Advertising questions. How ads work on this site, opting out, or reporting an ad issue.
Faster answers
A lot of common questions are already answered:
- About this site — what it is, what's free, and how it's funded
- Privacy policy — what's collected, what isn't, and how to opt out
- The margin vs markup explainer — the most-asked conceptual question
- Embed widget — drop our calculator on your own site