Substack Subscription Revenue Calculator
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 displays Monthly Net Revenue, Annual Net Revenue, Total Fees Deducted, Net Margin, Revenue Per Subscriber, and Est. Free Subscribers. The Insights panel shows 12-month churn impact, conversion opportunity, and annual fee burden with a monthly revenue split breakdown.
Example Calculation
A Substack writer with 500 paid subscribers at $8/month, a 70% free subscriber rate, and a 3% monthly churn wants to project their net earnings.
Paid Subscribers
500
Monthly Subscription Price ($)
$8
Free Subscriber Rate (%)
70
Monthly Churn Rate (%)
3
Results
Monthly Net Revenue
$3,334.00
Annual Net Revenue
$40,008
Total Fees Deducted
$666.00
Net Margin
83.4%
Revenue Per Subscriber
$6.67
Est. Free Subscribers
1,167
Insights card shows 12-month churn impact, conversion opportunity, and annual fee burden.
Tips
Optimize Your Churn Rate
A 3% monthly churn rate means you lose about 31% of your subscribers over 12 months. Focus on content quality and engagement to reduce churn — even a 1% reduction significantly boosts long-term net revenue.
Leverage Your Free Subscriber Base
With an estimated 1,167 free subscribers, converting just 5% would add 58 paid subscribers and approximately $387 in additional monthly net revenue.
Understand the Impact of Pricing
At $8/month, your ARPU is $6.67 after fees. Raising to $10/month would increase ARPU to approximately $8.34, adding $835 to monthly net revenue — test price sensitivity with your audience.
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 2026.
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 — 10% plus payment processing fees.
For a creator with 500 paid subscribers at $8/month, total deductions amount to $666 monthly ($400 to Substack, $266 to Stripe).
Knowing your true net margin of 83.4% 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
substack fee = gross monthly revenue × 10%
stripe fee = gross monthly revenue × 2.9% + paid subscribers × $0.30
net monthly revenue = gross monthly revenue - substack fee - stripe fee
annual net revenue = net monthly revenue × 12
ARPU = net monthly revenue / paid subscribers
From the gross figure, the calculator deducts the Substack platform fee (10%) and Stripe processing fee (2.9% + $0.30 per transaction).
These deductions yield your monthly net revenue.
The tool also simulates the impact of your monthly churn rate over 12 months to provide a forward-looking revenue forecast.
Forecasting a Substack Creator's Monthly Income
Let's analyze the potential earnings for a Substack creator using the default values:
- Gross Revenue: 500 subscribers × $8/month = $4,000.
- Substack Fee (10%): $4,000 × 0.10 = $400.
- Stripe Fee (2.9% + $0.30): $4,000 × 0.029 + 500 × $0.30 = $116 + $150 = $266.
- Total Fees: $400 + $266 = $666.
- Monthly Net Revenue: $4,000 - $666 = $3,334.
- Annual Net Revenue: $3,334 × 12 = $40,008.
- ARPU: $3,334 / 500 = $6.67 per subscriber.
- Net Margin: $3,334 / $4,000 = 83.4%.
This figure provides a clear picture of the creator's actual take-home income of $3,334/month before any personal taxes.
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) helps gauge the effectiveness of pricing and content value — at $6.67 per subscriber, there may be room to increase pricing or introduce annual plans.
Churn rate is another vital indicator; a 3% monthly churn leads to losing roughly 31% of subscribers over a year, emphasizing the need for retention strategies like exclusive content or community engagement.
A healthy net margin of 83.4% 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 takes a 10% platform fee from your gross subscription revenue. Additionally, Stripe charges approximately 2.9% + $0.30 per transaction for payment processing. On $4,000 gross revenue from 500 subscribers at $8/month, total fees are $666 (16.7% effective rate), leaving you $3,334 net.
How does churn rate affect a Substack writer's long-term revenue?
Churn rate significantly impacts long-term revenue by eroding the subscriber base over time. A 3% monthly churn means that after 12 months, you'd retain roughly 347 of your original 500 paid subscribers — a 31% loss. Without new subscriber acquisition, cumulative net revenue over 12 months would be lower than if you had zero churn.
What is a healthy free-to-paid subscriber conversion rate on Substack?
A healthy free-to-paid conversion rate on Substack typically falls between 5-10%. At the default 70% free rate, the calculator estimates 1,167 free subscribers from a total audience of 1,667 — a 30% paid conversion rate, which is exceptionally strong. Most newsletters start in the 1-5% range and grow through exclusive content offerings.
What is ARPU and why does it matter for Substack creators?
ARPU (Average Revenue Per User) measures your net earnings per paid subscriber after fees. At $6.67 ARPU from an $8/month subscription, you keep 83.4% of each subscriber's payment. Tracking ARPU helps you evaluate pricing decisions and compare your newsletter's monetization efficiency against industry benchmarks.