OnSumo Tools

Substack Paid Conversion Calculator

Model paid subscriber revenue after Substack and Stripe fees, with MRR milestones and a 12-month growth projection.

Audience and pricing

Growth and churn

Paid subscribers

50

Gross MRR

$333

Net MRR

$275

Net %

82.59%

You need about 3,660 free subscribers at 5% conversion to reach $1,000 net MRR.

Raising paid conversion by one point on a 10,000-person free list often adds more net revenue than a large price increase on a small paid base.

Fee breakdown

Substack (10%)
$33
Stripe processing
$25
Monthly / annual paid
35 / 15

Net MRR milestones

Target net MRRPaid subs neededFree subs needed
$500921,840
$1,0001833,660
$5,00091118,220
$10,0001,82136,420

12-month projection

MonthFreePaidGrossNet
M1100050$333$275
M2105051$339$280
M3110352$346$286
M4115853$354$293
M5121655$363$300
M6127656$372$308
M7134057$382$316
M8140759$393$325
M9147761$405$334
M10155163$417$345
M11162965$430$356
M12171067$445$367

Substack fee 10% plus Stripe processing (2.9% + $0.3 per paid subscriber). Source: https://support.substack.com/hc/en-us/articles/360041058212, retrieved 2026-05-29.

Substack and Stripe fees change by region and plan. Use this for planning, not as a payout statement.

How this tool works

Substack writers earn money when free subscribers upgrade to paid. Substack takes 10% of all paid subscription revenue plus Stripe's payment processing fee (typically 2.9% + $0.30 per transaction). Your effective take-home is roughly 87% of gross subscription revenue, depending on payment mix between monthly and annual plans. The calculator takes your free list size and applies your expected paid conversion rate to estimate how many paid subscribers you will have. It then calculates gross monthly revenue from your pricing mix and deducts Substack's fees to show net income.

Worked example

Newsletter profile: Free subscribers: 12,000. Paid conversion rate: 6%. Pricing: $8/month or $70/year. Payment mix: 40% monthly, 60% annual. Paid subscriber count: 12,000 x 0.06 = 720. Monthly plan subscribers: 288. Annual plan subscribers: 432. Gross monthly revenue: ($2,304 + $2,520) = $4,824. Gross annual: $57,888. Net after fees: $50,420. Monthly take-home: $4,202.

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Frequently asked questions

  • What is a good paid conversion rate on Substack?

    The median for established newsletters is around 5% to 10% of the free list. New newsletters typically see 2% to 4% until they build audience trust. Niche professional content with clear ROI for readers (finance, legal, career) often reaches 10% to 15%. General interest newsletters with broad audiences tend toward the lower end.

  • What should I price my Substack?

    The most common Substack pricing is $5 to $10 per month or $50 to $100 per year (typically 2 months free on annual). Higher-priced newsletters ($20 to $50/month) are common in finance, legal, and professional niches where the content has clear career or financial value. Lower price points attract more conversions but require more paid subscribers to reach the same revenue target.

  • Should I offer monthly or annual pricing?

    Both. Annual plans are better for revenue predictability and reduce churn because subscribers commit for a full year. Monthly plans lower the barrier to entry and attract readers who want to try before committing annually. Most successful Substack writers see 50% to 70% of their paid revenue from annual subscribers.

  • When should I launch a paid tier?

    Most newsletter operators recommend waiting until you have at least 1,000 free subscribers and consistent publishing for 3 to 6 months. This gives you enough audience to test paid conversion and enough content history for new readers to assess whether the subscription is worth it. Revisit this decision as your situation changes; the right answer today may differ from the right answer in 12 months.

  • Does Substack own my subscriber list?

    No. You can export your subscriber list (including emails) at any time. This is one of Substack's key advantages over platforms like YouTube or TikTok where you do not control the audience relationship. Portability means you can move to another platform if you choose to.

  • How do I increase my paid conversion rate?

    Three high-impact approaches: paywalled content that clearly demonstrates value (previews are free, full analysis is paid), a clear pitch in every free post explaining what paid subscribers get, and a welcome sequence for new free subscribers that introduces the paid tier within the first 7 days of joining.