A founder friend runs a SaaS doing €1M/month. He thought he was paying
@Stripe 2.9%. We pulled his last 12 months of statements together. The real number? 7.27%.
That's €524K a year going to fees, on a budget line that said €348K.
Here's what that exercise taught me about how payment processors really make money.
Layer #1: Base rate, what Stripe shows you: 2.9% €0.30
Layer #7: Capital float, what no pricing page mentions: T 2 to T 7 payouts on every transaction
Same merchant. Same customers. Same Stripe dashboard. One line on the pricing page. Seven more underneath.
𝗡𝗼𝘄 𝘇𝗼𝗼𝗺 𝗼𝘂𝘁.
The Merchants Payments Coalition pegs the average Visa/Mastercard interchange alone at 2.35%. Stripe's standard rate sits 0.55 points above that. Stripe's real margin on a vanilla domestic transaction is just 55 basis points.
The other 4 points come from products stacked on top: Stripe Billing for subscriptions ( 0.7%), Stripe Tax ( €0.50/calc), Radar for Fraud Teams ( €0.07/screen), the international card surcharge ( 1.5%), the FX spread ( 1%), disputes (€15 per chargeback, non-refundable), and the float on every payout sitting in Stripe's account for 2 to 7 days.
Most founders never run the math. They see 2.9% on the homepage and budget for 2.9%. Then they wonder why their payment line doubles in the year-end review.
𝗪𝗵𝗼'𝘀 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗰𝗼𝗺𝗽𝗲𝘁𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝘄𝗵𝗼?
Most people frame this as "Stripe vs alternative PSPs." It's not.
The real war is:
- Stripe's classic stack (2.9% add-ons) vs Stripe's stablecoin stack (1.5% flat)
- Card networks (Visa, Mastercard) vs onchain settlement (USDC, PYUSD, EURC)
- T 2 batch payouts vs same-block finality
And Stripe knows it. They paid $1.1B for Bridge, their largest acquisition ever. They launched Stablecoin Financial Accounts in 101 countries. They shipped stablecoin subscriptions in October 2025. Their Optimized Checkout now defaults to accepting stablecoins.
They're not defending the 2.9% model. They're migrating off it before someone else does it for them.
Publicly selling the headline rate while privately rebuilding their stack on rails that obsolete it. Classic frenemy move, on themselves this time.
—
For founders done paying for layers they never asked for: dozens of SaaS have already moved their Stripe volume to
@Subyhq. 5% all-in. No hidden fees, no add-ons, no FX spread, no float games. Dropping to 4% in the coming weeks.
My friend? He's already on the migration plan.
PS: I post weekly about payments, stablecoins, and the reality of building a payment startup. Follow for more!