Substack Subscription Revenue Calculator

Enter your paid subscriber count, price, free-tier rate, and churn to see net monthly and annual revenue, fee breakdown, and a 12-month retention projection.

Created by Luis GonzalezLast updated: May 9, 2026

How to Use This Calculator

1
Enter Paid Subscribers
Input the current number of active paid subscribers to your Substack newsletter.
2
Provide Monthly Subscription Price
Enter the price each paid subscriber pays per month for your content.
3
Specify Free Subscriber Rate
Input the percentage of your total audience that is on the free tier. This helps estimate your total list size.
4
Set Monthly Churn Rate
Enter the percentage of paid subscribers who typically cancel their subscription each month.
5
Review your results
The calculator will display your monthly and annual net revenue, total fees, and a 12-month churn forecast.

Example Calculation

A Substack writer with 500 paid subscribers at $8/month, a 70% free subscriber rate, and a 3% monthly churn wants to project their net earnings.

Paid Subscribers

500

Monthly Subscription Price ($)

Free Subscriber Rate (%)

Monthly Churn Rate (%)

Results

$3,334.00

Tips

Optimize Your Churn Rate

A 3% monthly churn rate means you lose 36% of your subscribers annually. Focus on content quality and engagement to reduce churn, as even a 1% reduction can significantly boost long-term net revenue.

Leverage Your Free Subscriber Base

Your 'Est. Free Subscribers' is a conversion opportunity. Offer exclusive content or limited-time discounts to convert a portion of your free audience into paid subscribers, directly impacting your gross revenue.

Understand the Impact of Pricing Tiers

Experiment with different subscription price points or annual discounts. A higher price point or an annual option (often at a 15-20% discount) can increase your Average Revenue Per User (ARPU) and improve net margin.

Projecting Your Substack Earnings After Fees

The Substack Subscription Revenue Calculator offers creators a transparent view of their potential earnings by factoring in platform and payment processing fees, subscriber count, and churn.

This tool is essential for writers, podcasters, and other creators using the platform to forecast their monthly and annual net revenue, understand their net margin, and estimate Average Revenue Per Subscriber (ARPU).

With Substack's 10% platform fee and Stripe's processing costs, accurately calculating your take-home pay is crucial for business planning in 2025.

Understanding Your Creator Economy Earnings

In the burgeoning creator economy, understanding your net earnings after platform fees is paramount for sustainable growth.

Platforms like Substack empower individual creators, but they also take a cut, typically ranging from 5-15% of gross revenue, plus payment processor fees.

For a creator with 500 paid subscribers at $8/month, these deductions can amount to hundreds of dollars monthly.

Knowing your true net margin helps in setting realistic financial goals, planning content investments, and evaluating the profitability of your publishing efforts.

The Financial Model Behind Substack Revenue

The calculation begins by determining your gross monthly revenue from your paid subscribers and monthly subscription price.

gross monthly revenue = paid subscribers × monthly subscription price

From this gross figure, the calculator deducts the Substack platform fee (typically 10%) and an estimated Stripe processing fee (around 2.9% + $0.30 per transaction).

These deductions yield your monthly net revenue.

The tool also projects annual net revenue and simulates the impact of your monthly churn rate over 12 months to provide a forward-looking revenue forecast.

💡 To get a comprehensive view of your creator business, consider using our Operating Cost Calculator to account for expenses beyond platform fees, such as content creation tools or marketing.

Forecasting a Substack Creator's Monthly Income

Let's analyze the potential earnings for a Substack creator using the default values:

Input Paid Subscribers: 500 active paid subscribers.
Enter Monthly Subscription Price: $8 per month.
Specify Free Subscriber Rate: 70% of the total audience is free.
Set Monthly Churn Rate: 3% of paid subscribers cancel each month.

First, the Gross Revenue is 500 subscribers × $8/month = $4,000.

Then, Substack's 10% fee is $400.

Stripe's fees (approx. $0.532 per transaction) amount to $266 (500 × $0.532).

Total fees are $400 + $266 = $666.

The Monthly Net Revenue is $4,000 - $666 = $3,334.

This figure provides a clear picture of the creator's actual take-home income before any personal taxes.

💡 For a deeper dive into your business's financial health, our Operating Cash Flow Ratio Calculator can help assess your ability to generate cash from operations.

Interpreting Substack's Revenue Metrics

For Substack creators, understanding key metrics beyond just gross revenue is critical for strategic growth.

Average Revenue Per User (ARPU), for instance, helps gauge the effectiveness of pricing and content value.

If your ARPU is low, it might signal an opportunity to introduce higher tiers or annual plans.

Churn rate is another vital indicator; a 3% monthly churn can lead to significant subscriber loss over a year, emphasizing the need for retention strategies like exclusive content or community engagement.

Expert creators often monitor their net margin after fees to ensure their content production costs are justified.

A healthy net margin, typically above 70-80% after platform and payment fees, allows for reinvestment into quality content, marketing, or team expansion, driving sustainable growth in the competitive creator landscape.

Frequently Asked Questions

What are the typical fees associated with publishing on Substack?

Substack typically takes a 10% platform fee from your gross subscription revenue. Additionally, payment processing fees, primarily from Stripe, are applied, which are usually around 2.9% + $0.30 per transaction. These fees are deducted before your net revenue is paid out.

How does churn rate affect a Substack writer's long-term revenue?

Churn rate significantly impacts a Substack writer's long-term revenue by eroding the subscriber base over time. A 3% monthly churn, for example, means that after 12 months, only about 69% of the initial subscribers would remain, necessitating continuous acquisition efforts to maintain or grow revenue.

What is a healthy free-to-paid subscriber conversion rate on Substack?

A healthy free-to-paid subscriber conversion rate on platforms like Substack can vary widely but often falls between 1-5%. High-performing newsletters might see conversion rates closer to 5-10% or even higher, depending on their niche, content value, and conversion strategies.