PERCENTAGE-FEE CALCULATOR
When does Substack’s 10% cost more than a flat monthly plan?
Enter your paid-subscription revenue and the flat monthly price you are considering. We’ll show the direct platform-fee difference and the crossover point.
Monthly difference$57
At $1,000 revenue, 10% costs $100. A $43 flat fee is $57 lower.
Revenue-share model
Flat-fee crossover
$430/month in paid revenue.
Not included
Payment processing, taxes, refunds, discounts, migration work, and the value of platform features.
A lower fee does not make the whole platform better
Audience discovery, recommendations, community features, and a familiar publishing workflow may be worth paying more for. This calculator only compares the fee models.
Before moving, use the migration calculator to see how long the monthly difference would take to repay the switching work.
PRIMARY SOURCES