Three years of platform fees: what growth actually costs you

The same newsletter, thirty-six months of bills

Pick any comparison on this site and it holds your list still: 5,000 subscribers, 250 paying, here's the bill. That's the right way to answer "what would I pay today" and the wrong way to answer "what will this platform cost me". Newsletters grow, and the platforms price growth very differently — so the honest version runs the whole path and adds it up.

Here's the path we'll use: 500 subscribers growing to 15,000 over 36 months — about 10.2% a month — with 2% of the list paying $8/month throughout. That's $25,120 of gross subscription revenue over three years. In month one, the bill is $5.80 on Kit's Newsletter (Free) plan, $13.88 on Substack, $14.32 on Buttondown's Basic plan and $34.32 on Ghost's Publisher (up to 1,000 members) plan. By month 36 the same newsletter pays $314.83 on Kit, $416.40 on Substack, $298.60 on Buttondown's Advanced plan and $300.60 on Ghost's Publisher (up to 25,000 members) plan — Kit was cheapest at the start, Buttondown is cheapest at the end.

The shape underneath those numbers is the whole story. Ghost's all-in cost starts at 42.9% of your subscription revenue and ends at 12.53%, because a flat plan fee spread over growing revenue gets cheaper every month you don't cross a bracket. Substack's is 17.35% in month one and 17.35% in month 36 — identical, because it's a percentage by construction. Pricing verified as of 2026-08-18; the growth path is our assumption, and it's the one thing here you should change to match your own.

The three-year totals

Added up over 36 months on that path: Buttondown $3,454.48, Ghost (Pro) $4,042.48, Kit $4,164.58, Substack $4,358.32. The spread between cheapest and dearest is $903.84 — real money, but less dramatic than the month-36 gap alone would suggest, because the early months are small for everyone.

The reordering is the interesting part. Kit has the cheapest first month at $5.80 and finishes $710.10 behind Buttondown over three years. And Substack, the dearest of the four here at $4,358.32, is only 7.8% above Ghost's $4,042.48 — on a list that grew 30× in three years. Its 10% take rate does get expensive, but it takes sustained growth to make the gap large, and it never charges you for the 14,700 readers who aren't paying you.

As a share of the $25,120 you collected, that's 13.75% on Buttondown against 17.35% on Substack. One caveat on the winner: Buttondown's plan prices are verified, but we haven't confirmed which features are add-ons at each tier, and its pricing assumes at most one send a day to the full list — see Buttondown pricing explained.

The payback period nobody quotes

Say you start on Ghost while someone identical starts on Substack. Your monthly bill is higher than theirs until month 22, when your list hits 3,848 subscribers and the flat fee finally beats the 10% cut. That's the number a crossover comparison gives you, and on its own it's misleading — you've spent the previous months paying a plan fee against revenue too small to absorb it, and that deficit doesn't disappear the moment the monthly bills cross.

Your running total doesn't overtake theirs until month 33 — 11 months after the monthly bills crossed. Up to that point, the person on Substack has spent less on fees than you have, in total, for the whole life of the newsletter. That lag is the real cost of a flat fee: not the fee itself, but the months of paying it before your revenue is big enough to make it a bargain. It's the same crossover mechanic as flat fee or revenue share, measured in months rather than dollars per month.

Kit and Buttondown reach the black faster on this path because neither starts you at Ghost's entry plan price — Kit's Newsletter (Free) plan covers the first month at $0 in plan fees, Buttondown's Basic at $9. The size of the hole you start in is mostly the size of your entry plan, which is the argument for looking hard at what's cheapest when you're starting out even if you expect to grow past it.

Grow slower and the answer reverses

Run the identical newsletter along a gentler path — 500 to 5,000 subscribers over the same 36 months, about 6.8% a month — and the totals come out Buttondown $1,582.62, Substack $1,979.30, Kit $2,256.33, Ghost (Pro) $2,414.62. Substack moves to second of four, and Ghost never catches up inside the three years — its running total is still $435.32 above Substack's in month 36, even though its monthly bill dropped below Substack's back in month 32.

Nothing changed except the growth rate. That's worth sitting with, because it's the honest answer to "which platform is cheapest": a flat fee is a bet that your revenue will grow into it, and revenue-share pricing is what you want if it doesn't. If you're unsure which of those describes you — most people starting out genuinely don't know — the platform that charges you nothing until you earn is the cheaper mistake. The mechanics of that trade are in how much Substack actually costs, and Ghost vs Substack puts the two side by side at fixed sizes.

Two limits on all of this. beehiiv isn't in the totals above: its plan price is verified only to 2,500 subscribers, which the fast path crosses in month 18. Over the 17 months it does cover, beehiiv costs $951.61 against Buttondown $552.18, Substack $571.86, Kit $681.49, Ghost (Pro) $865.18 — its Scale plan is a heavy fixed cost on a small list, which is the same picture as beehiiv pricing explained. And the growth path, conversion rate and price here are assumptions, not data. Change them: the calculator prices any list size and revenue you like, and what a paid newsletter costs at 50,000 subscribers picks up where this path ends.

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