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Substack looks free until your paid list grows, and then that 10% cut quietly becomes one of your biggest recurring costs.
by Alkan Balkaya · Last updated: 2026-07-27Substack is free to publish and takes no money until you charge for subscriptions. Once you do, it keeps 10% of your paid revenue, and Stripe adds roughly 2.9% plus 30 cents per transaction. At 1,000 paid subscribers, that combined cut can exceed $900 every month, far more than most flat-price newsletter tools charge.
That is the whole story in a sentence, but the numbers deserve a closer look. The 10% fee feels painless when you have ten paying readers. It becomes a serious line item the moment your paid list scales, because a percentage cut grows with your success while a flat subscription does not.
Below, I break down exactly what Substack costs at 100, 500, 1,000, and 5,000 paid subscribers, show when the 10% model actually wins, and compare it to flat-priced newsletter tools using verified numbers.
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Key Takeaways
Substack charges nothing to start a publication, send emails, or grow a free audience. It only makes money when you turn on paid subscriptions, at which point it takes a flat 10% of every dollar your readers pay. That is the platform fee, and it is the same whether you have five paying readers or fifty thousand.
The 10% is not the only cut, though. Substack processes payments through Stripe, and Stripe takes its own fee: roughly 2.9% of the transaction plus 30 cents per charge. That 30 cent flat component matters more than people expect, because it applies to every single payment. On a $5 monthly subscription, 30 cents is 6% of the charge before the percentage fees even land.
So the true deduction on paid revenue is the 10% platform fee stacked on top of Stripe’s processing fee. Together they typically pull 13% to 16% off the top, depending on your subscription price and whether readers pay monthly or annually. Annual billing softens the per-transaction sting because you charge once a year instead of twelve times.
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At a $5 monthly subscription, Substack and Stripe together cost about $94.50 per month at 100 paid subscribers, $472.50 at 500, $945 at 1,000, and $4,725 at 5,000. The fees scale in a straight line with your revenue, which is exactly what makes the model expensive once your paid list is large.
The table below assumes a $5 monthly subscription billed monthly, which is the least favorable case because the 30 cent per-charge fee hits every month. Real costs drop somewhat if your readers pay annually.
| Paid subscribers | Gross revenue/mo | Substack 10% | Stripe fees | Total fees/mo | Total fees/yr |
|---|---|---|---|---|---|
| 100 | $500 | $50.00 | $44.50 | $94.50 | $1,134 |
| 500 | $2,500 | $250.00 | $222.50 | $472.50 | $5,670 |
| 1,000 | $5,000 | $500.00 | $445.00 | $945.00 | $11,340 |
| 5,000 | $25,000 | $2,500.00 | $2,225.00 | $4,725.00 | $56,700 |
Look at the annual column. A creator with 1,000 paying readers hands over more than $11,000 a year, and the 10% platform fee alone is $6,000 of that. A flat-priced email tool serving the same list would typically cost a small fraction of that number, because it charges for the software, not for a share of your income.
The 10% model wins when your paid revenue is small or unpredictable. If you have 20 paying readers at $5 a month, Substack costs you about $19 in combined fees, and a flat $39 tool would cost more than double. Percentage pricing is friendly to beginners because you only pay when you earn, and you never owe a fixed bill during a slow month.
It also wins if you value the bundled distribution. Substack includes hosting, a reader app, discovery through its network, comments, and payment handling in that single cut. For a solo writer who wants zero setup and no separate bills, the all-in-one convenience can justify the fee, at least early on.
Where the 10% model stops winning is scale. Because the fee is a percentage, it grows without limit as your revenue climbs, while a flat subscription plateaus. Email remains one of the highest-return marketing channels, and industry email marketing benchmarks consistently show strong returns on owned audiences, which means the readers you monetize are worth protecting from an ever-growing platform tax.
The break-even point comes surprisingly early. Once your Substack fees exceed what a flat tool charges for the same list size, every additional paid subscriber makes the gap wider, not smaller.
Flat-priced tools charge by list size or sending volume, not by a slice of your revenue, so your cost is capped and predictable no matter how much you earn. The table below compares Substack to two flat-price options using verified numbers (as of 2026-08-27).
| Platform | Pricing model | Free plan | Support | Best for |
|---|---|---|---|---|
| Substack | 10% of paid revenue plus Stripe fees | Yes, free to publish | Help center and email | Solo creators monetizing on-platform |
| Mailsoftly | Flat, from $15/mo annual (Basic $39/mo, Business $79/mo) | Yes, 500 contacts and 2,000 emails/mo | Human support and free migration | Businesses wanting flat, predictable cost |
| Kit (formerly ConvertKit) | Flat by subscribers, Creator from $39/mo at 1,000 | Yes, up to 10,000 subscribers with limits | Email and chat | Creators who want deep automations |
Run the comparison at 1,000 paid readers. Substack takes roughly $945 a month. A flat tool billed by list size charges a fixed monthly rate regardless of how much revenue those readers generate. That is the structural difference: Substack scales with your income, and flat tools scale with your list. You can see the full plan ladder on Mailsoftly’s transparent pricing page, where the price is tied to contacts and sending volume rather than a percentage of what you charge.
There is a trade-off worth naming. Substack bundles hosting, discovery, and payments; flat tools generally handle email and automation while you connect your own payment and website layer. If on-platform discovery is central to your growth, that bundle has real value. If you already have an audience and just want to send, the flat model keeps far more of your revenue.
No. If you never turn on paid subscriptions, Substack is genuinely free. You can publish, build an email list, and send to your entire audience without paying a cent, and there is no cap that forces you into a paid plan. This is the honest strength of the platform and the reason so many writers start there.
The catch is that free forever also means free to monetize is off the table without accepting the 10% cut. The moment you decide to charge, the fee structure switches on. So the real question is not whether Substack is cheap today, but what it will cost when your newsletter starts earning, because that is when the percentage model begins working against you.
The audience you are building is an asset. As the broader newsletter and email advertising market keeps expanding, the value of owning your subscriber relationship, rather than renting it against a revenue share, keeps rising too. Many creators start free on Substack and later migrate to a flat-priced tool once monetization makes the fee painful.
Choose Substack’s 10% model if you are just starting to monetize, have a small or uncertain paid list, and want the built-in discovery network with zero setup. At low revenue, paying only when you earn is a genuine advantage, and the bundled convenience is worth something.
Choose a flat-priced tool once your paid revenue is steady and growing. When your monthly Substack fees start to exceed what a flat subscription would cost for the same list, every new paying reader widens the gap. Flat pricing turns your software into a fixed cost, so scaling revenue no longer means scaling your platform bill.
The practical middle path many creators take is to grow free on Substack, watch the fee math, and migrate before the 10% cut eclipses a flat plan. If you want to run the numbers against every major platform side by side, the roundup below is the fastest way to see where you land.
For the broader landscape, see our full comparison of best email marketing services covering every major platform.
Yes, if you keep your newsletter free. Publishing, sending, and growing a free audience cost nothing on Substack. Fees only apply once you enable paid subscriptions, at which point Substack takes 10% and Stripe takes its processing fee.
It is a flat platform fee equal to 10% of your paid subscription revenue. It is charged on top of Stripe payment processing of roughly 2.9% plus 30 cents per transaction, so the combined deduction is typically 13% to 16% of paid revenue.
Yes. Substack’s 10% and Stripe’s processing fee are separate and stack. On a $5 monthly subscription, Stripe’s 30 cent per-charge fee alone is significant, which is why annual billing lowers your effective cost compared with monthly billing.
Once your combined Substack and Stripe fees exceed a flat plan for the same list size. This often happens in the low hundreds of paid subscribers, and the savings grow with every additional paying reader because flat pricing does not rise with your revenue.
Yes. You own your subscriber list and can export it to another platform. Many flat-priced tools offer migration help so you can keep your audience and switch to predictable pricing without losing your relationship with readers.
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