Most newsletter creators ask, "How do I grow faster?" too early. The better first question is, "What does one issue need to earn so this project is worth my week?"
Model revenue before list growth using three inputs: opens, paid conversion, and sponsor CPM. If the model cannot support your target income at realistic assumptions, fix the offer before chasing subscribers. Growth multiplies a working model. It does not rescue a weak one.
Run a five-minute baseline model
I start with 1,000 subscribers and a conservative 40% open rate.
- Opens per issue: 400
- Sponsor CPM assumption: $25 per 1,000 opens
- Sponsorship revenue per issue: about $10
Then I test paid subscriptions. If 2.5% of free readers convert at $10/month, that is 25 paid readers and $250 MRR before churn and processing fees. Include payment costs from Stripe so you are not projecting gross as net.
Pick assumptions you can defend
Creators copy outlier screenshots and assume 8-10% paid conversion. Most lists do not start there. I run three scenarios:
- conservative: 1.5% paid conversion
- base: 2.5%
- strong: 4%
If the conservative case still looks survivable, you have room to scale. If only the strong case works, your offer is fragile.
Use platform data, not vibes
Tools like Kit and beehiiv make open and click trends easy to track. Use those numbers to test whether readers actually want your paid angle before spending on acquisition.
My rule is simple: do not buy growth until three consecutive issues hit your base-case model.
Scale after the math works on a small list, not before.
