What does your platform really take?

It depends on the plan. As of October 25, 2026, Memberstack's Basic plan ($29 a month, or $25 billed yearly, up to 1,000 members) charges 4%, Professional ($49, or $39 yearly, up to 5,000) charges 2%, Business ($99, or $79 yearly, 10,000+) charges 0.9%, and Established ($499, or $399 yearly) charges no transaction fee. Transaction fees apply only to paid signups. Stripe's processing, 2.9% plus 30 cents per US card payment plus Stripe Billing's 0.7% on subscriptions, is charged separately, by Stripe.

Yes, as of October 25, 2026. A 200 Member Plan costs $99 a month with no transaction fees, for up to 200 members. Startups that attended a program like Y Combinator and have raised less than $1M get 10,000 members and 0% fees for $249 a month, or $199 a month billed yearly. Non-profits get 50% off for 12 months, renewable with updated proof; it doesn't combine with Startup pricing. The calculator includes the 200 Member Plan automatically and the other two when you tick that you qualify.

On Memberstack, yes: limits count all live members, free and paying, and test-mode members don't count. Outseta's limits are in contacts, and anyone whose email address is stored in Outseta's CRM has a contact record, so free members count too. Memberful and MemberSpace have no member limits. Free members never add transaction or processing fees, because they don't pay.

While you're small. A 4.9% fee on $500 a month is $24.50; on $10,000 it's $490. A flat plan price stays the same as you grow. Divide the plan price by the percentage to find the crossover: a $99 plan with no fee beats a 5% fee once members pay you more than $1,980 a month.

Not entirely: Stripe charges for every card payment, and its standard US rate is 2.9% plus 30 cents. You can reduce the fixed part by billing less often. A member on an annual plan is one payment a year instead of twelve, so they cost 30 cents a year in fixed fees instead of $3.60.

Memberstack, Memberful, MemberSpace and Outseta, which all process payments through Stripe. Hosted platforms such as Patreon, Substack and Kajabi aren't included.

Every price and fee was read from each tool's official pricing or help page on October 25, 2026, and the page links to every source. Anything we couldn't confirm on an official page is marked unverified or estimated. Pricing changes, so check the linked pages before you decide.

No. The calculator runs entirely in your browser and nothing you type is sent anywhere. The copy link button puts your numbers in the page URL so you can share them, and that only happens if you click it.