Where Your $5 Coffee Payment Actually Goes (And How to Fix It)

[Sascha]

You tap your card. The barista makes your coffee. Simple transaction, right?

Not quite. Here's what actually happens behind that tap.

The Journey of Your $5​

When you pay $5 for a coffee using your Visa or Mastercard:

1. Your bank (the issuer) authorizes the transaction and collects an interchange fee (0.3-0.8%)
2. Visa or Mastercard routes the transaction and collects a scheme fee (~0.05%)
3. The cafe's bank (the acquirer) processes the payment and takes a margin
4. The payment processor (like Tyro, Square, or Stripe) takes their cut
5. The terminal provider charges a rental or per-transaction fee

By the time the cafe gets paid, 2-3 business days later, they've lost roughly $0.015-$0.04 of your $5.

Doesn't sound like much? Across all of Australia's card payments, that's $1.6 billion a year going to intermediaries.

The Surcharge Ban Doesn't Fix This​

Australia's RBA just banned card surcharges (effective October 2026). Consumers won't see that 1.5% line item anymore.

But the 0.3-0.8% processing cost per tap doesn't disappear. It gets absorbed into higher prices, reduced rewards, or increased bank fees.

The RBA itself estimates a one-off 0.1% price increase across the board.

What If the Cafe Kept the Full $5?​

OpenPasskey built a payment card that works at any terminal. Same tap. Same experience. But no intermediaries.

How?

• Own card identifier from ISO (the same system Visa uses)
• EMV contactless standard (works at every terminal)
• Settlement in seconds (not 2-3 days)
• No interchange, no scheme fees, no acquirer margin

The cafe gets $5. Not $4.96.

The Scale​

3,200+ users across 20+ Sydney cafes are already using this system. Built by three people in ten months with zero external funding. Recently selected for Blackbird Ventures' Giants Cohort 11.

For Developers​

The technical stack:

• P-256 ECDSA on Java Card chip
• On-chain verification via RIP-7212 precompile on Base L2
• ClearingVault with CREATE2 merchant receivers
• Three payment methods: NFC card, mobile HCE, ERC-681 QR

If you're building anything in the payments space, the combination of EMV standard + on-chain settlement is worth understanding.

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OpenPasskey | @OpenPasskey

Источник: Where Your $5 Coffee Payment Actually Goes (And How to Fix It) https://dev.to/alfredz0x/where-your-5-coffee-payment-actually-goes-and-how-to-fix-it-23a5