How many free subscribers do I need before launching paid?

There is no magic number, but 1,000+ engaged free subscribers is a common benchmark before launching paid. More important than size is engagement — a 500-subscriber list with 50% open rates will outperform a 5,000-subscriber list with 10% open rates.

What is a realistic Substack conversion rate?

Top-performing Substacks see 5–15% paid conversion rates. The median is closer to 2–5%. Conversion rates above 10% typically indicate a highly engaged niche audience where the creator has strong authority and the content is genuinely hard to find elsewhere.

How many free subscribers do I need before launching paid?

There is no magic number, but 1,000+ engaged free subscribers is a common benchmark before launching paid. More important than size is engagement — a 500-subscriber list with 50% open rates will outperform a 5,000-subscriber list with 10% open rates.

What is a realistic Substack conversion rate?

Top-performing Substacks see 5–15% paid conversion rates. The median is closer to 2–5%. Conversion rates above 10% typically indicate a highly engaged niche audience where the creator has strong authority and the content is genuinely hard to find elsewhere.

Newsletter

Substack Revenue Calculator

Calculate your Substack monthly and annual revenue based on free-to-paid conversion, pricing tier, churn rate, and sponsorship income. See a 6-month growth projection.

Newsletter Details

Free Subscribers

Total free subscribers on your list

Paid Conversion Rate

% of free subscribers who go paid (avg: 3–8%)

Subscription Price

Monthly price — annual plan valued at 10× monthly

Annual vs Monthly Split

Annual plans reduce churn and improve cash flow

Monthly Churn Rate

% of paid subscribers who cancel each month

Sponsorship Rate Per Send

Leave 0 if no sponsors

Sends Per Month

How many newsletters you send per month

Tip Jar Enabled

Assumes ~1% of paid readers tip $5/month

Substack Revenue Summary

Gross Monthly Revenue

$435.00

Estimated annual: $4,609.40

Paid Subscribers

10 annual · 40 monthly

Gross Subscription Revenue

$483.33

Substack's Cut (10%)

$48.33

Net Subscription Revenue

$435.00

Sponsorship Revenue

$0.00

Tip Jar Revenue

$0.00

Avg Revenue per Paid Subscriber

$8.70/mo

6-Month Revenue Projection (with 5% monthly churn)

Month	Revenue	vs Month 1
Month 1	$435.00	—
Month 2	$413.25	-5.0%
Month 3	$392.59	-9.8%
Month 4	$372.96	-14.3%
Month 5	$354.31	-18.5%
Month 6	$336.59	-22.6%

Churn compounds monthly. Reduce churn by converting free readers to annual plans and focusing on retention.

Note

Substack takes 10% of subscription revenue plus standard Stripe payment fees (~2.9% + $0.30 per transaction). Annual plan revenue is modeled as 10× monthly price. Projections assume no new subscriber growth — adding new readers will offset churn and grow revenue over time.

Ready to act on this?

BeehiivFree to startOur top pick

Free up to 2,500 subscribers. The platform serious newsletter creators use.

Affiliate links — we may earn a commission at no cost to you.

How the Formula Works

Formula

Paid Subscribers = Free Subscribers × Paid Conversion Rate Gross Monthly = (Monthly Subs × Price) + (Annual Subs × Price × 10 / 12) Net = Gross × 0.90 (Substack takes 10%) Month-6 Projection = Net × (1 − Churn Rate)^6

Variables

Paid Conversion RateTypically 1–10% of free subscribers upgrade to paid; median is ~5%

Churn RateMonthly subscriber cancellation rate — industry average is 3–7% per month

Annual Pricing BonusAnnual plans are priced at ~10× monthly price, reducing churn and processing fees

Worked Example

2,000 free subscribers, 5% conversion = 100 paid at $10/month. Gross = $1,000. Substack fee = $100. Net = $900/month. At 5% monthly churn: Month 6 = $900 × (0.95)^6 ≈ $662.

Substack vs. Other Newsletter Platforms

Substack takes 10% of revenue but requires no technical setup — it's the lowest-friction path to paid subscriptions. Ghost (self-hosted) takes 0% but requires more setup. Beehiiv charges a flat monthly fee with no revenue share. For creators starting out, Substack's simplicity usually outweighs the 10% cost.

Frequently Asked Questions

Substack takes 10% of all paid subscription revenue, plus Stripe's standard payment processing fee of 2.9% + $0.30 per transaction. Free newsletters cost nothing to publish on Substack.