The two seconds that involve four businesses
When you tap a card at a Brisbane café, the payment clears through at least four separate organisations before the merchant sees money: the merchant's bank (the acquirer), the card scheme that runs the network, your bank (the issuer), and the clearing and settlement arrangements that actually move the funds.
Knowing which party does what is practical. It tells you who to call when a refund stalls, why a merchant can't always reverse a charge instantly, and which fees sit on which side of the transaction. The Reserve Bank of Australia (RBA) describes its own role in the payments system as broad, covering card payments among other instruments.
The parties and what each one owns
Cardholder. You hold the credential and authorise the transaction. You dispute transactions through your issuer, not the merchant's bank.
Issuer. Your bank or card provider. It issued the card, decides whether to approve or decline a transaction, and carries the relationship with you. It also carries the risk that you don't repay (for credit) or that a disputed transaction gets reversed.
Merchant. The business accepting the payment. It contracts with an acquirer, not directly with the schemes or with your bank.
Acquirer. The merchant's financial institution. It provides the terminal or gateway, routes the transaction, and credits the merchant's account once settlement occurs. It is the merchant's counterparty for disputes, chargebacks and refunds.
Card scheme. The network that sets the technical and operating rules and routes messages between acquirer and issuer. Major international schemes operate in Australia alongside the domestic debit scheme, and Australian debit cards are commonly co-branded so a transaction can be routed over more than one network.
The key structural point: your bank and the merchant's bank generally do not deal with each other directly. The scheme sits in the middle as the rule-setter and message router.
What happens during a tap
A card payment runs in three phases that are often conflated. Separating them explains most delays.
1. Authorisation (seconds). The terminal sends the transaction to the acquirer, which forwards it through the scheme to the issuer. The issuer checks the credential, available funds or credit, and fraud signals, then returns an approval or decline. The merchant sees "approved" — but no money has moved yet. Approval is a promise, not a transfer.
2. Clearing (usually overnight or batched). Approved transactions are exchanged between acquirers and issuers so each side knows what it is owed. Per the RBA, the clearing of most non-cash payment instruments in Australia is governed by rules and procedures — these are the industry arrangements, administered by Australian Payments Network (AusPayNet), that define when and how files are exchanged.
3. Settlement (the actual money). Funds move between institutions. High-value payments in Australia are settled through the RBA's real-time gross settlement (RTGS) system, where banks settle across their Exchange Settlement Accounts at the central bank. Card obligations are then netted and settled between institutions through these same central-bank arrangements.
This is why a merchant can be "paid" in the evening but see funds the next business day, and why a refund can take longer to appear than the original purchase took to leave.
Where the fees sit
The RBA source describes the architecture of the payments system, not commercial rates. No rate, percentage or cap is stated here — those are commercial and contractual, and they change.
What is useful is the direction of costs, which is stable even when the numbers are not:
| Party | Pays | Receives | Practical note |
|---|---|---|---|
| Cardholder | Card fees, interest if revolving | The goods or service | Not charged a fee per tap by the scheme |
| Merchant | Merchant service fee to acquirer | Settled funds | This is the bundled cost of accepting cards |
| Acquirer | Interchange to issuer, scheme fees | Merchant service fee | Prices the bundle for the merchant |
| Issuer | Fraud, credit and dispute costs | Interchange from acquirer | Carries the cardholder risk |
| Scheme | Operating the network | Scheme fees from participants | Sets the rules of the network |
Two things follow from this. First, the merchant generally bears the direct cost of acceptance, and that cost is negotiated between the merchant and its acquirer — so two cafés on the same street can pay materially different effective rates. Second, interchange flows from the merchant's side to the cardholder's side, which is why the fees you pay as a cardholder and the fees a merchant pays for accepting your card are unrelated figures.
The rails around cards
Cards are one rail among several, and the alternatives are worth knowing because they shift who bears what.
The RBA also covers Australia's fast payments system — the New Payments Platform (NPP) — alongside high-value payments settled through the RTGS system. The NPP is a real-time, data-rich rail that settles between institutions continuously rather than in overnight batches. For a merchant, that changes the timing question (funds availability) rather than the party structure: there is still a sending institution, a receiving institution and a set of rules governing the exchange.
If you are choosing between rails as a business, the decision is usually about three things: when funds land, what a dispute or reversal costs you, and what your acquirer charges for each option.
Who regulates what
Three layers matter, and they are not interchangeable.
The RBA has a broad role in the payments system, which includes card payments and the high-value settlement system. Separately, the Payment Systems (Regulation) Act 1998 is the legislation referenced alongside the industry body Australian Payments Network in the RBA's material on payment systems in Australia — it is the framework under which payment systems can be regulated. AusPayNet, for its part, administers the industry clearing rules and procedures for most non-cash payment instruments.
For a reader, the practical split is: the RBA is the public regulator with system-wide powers, the Act is the legal basis, and AusPayNet sets and administers the operational clearing rules institutions follow day to day. Your direct contractual relationship, however, is with your acquirer and your issuer.
What this means depending on who you are
If you are a consumer: disputes go to your issuer, and refunds go back through the merchant's acquirer — so a merchant saying "we've processed it" and you seeing nothing are both consistent with the system working normally.
If you are a merchant: your single point of contact is your acquirer. Pricing, terminal behaviour, settlement timing and chargeback handling all flow from that contract.
If you are comparing options: ask about the settlement window, the chargeback process and the fee structure separately. They are independent variables, and conflating them is the most common way businesses misjudge the cost of taking payments.
Questions worth verifying yourself
Because pricing and rules are contractual and change over time, confirm these directly rather than relying on any summary:
- What is your acquirer's merchant service fee structure, and is it bundled or itemised?
- When do settled funds actually reach your account, and on which days?
- Which scheme does each transaction route over, and can you influence that routing?
- What is the chargeback process, and what does each one cost you?
- Which clearing and settlement arrangements does your provider use, and what happens on weekends or public holidays?
Next steps
If you accept card payments, pull out your merchant statement and identify three numbers: the effective rate you paid last month, your average settlement lag, and your chargeback count. Then ask your acquirer to explain each in writing. If you simply want to understand what happens after you tap, start with the RBA's payments system overview linked in the source above, which sets out its role across card payments, high-value settlement and the NPP.
General information only. This article describes how payment systems are structured in Australia and is not legal, tax, financial or credit advice, and it does not recommend any provider or product. Fees, rules, settlement timeframes and regulatory arrangements change — verify current details with your own bank, acquirer or card issuer, and with the Reserve Bank of Australia, before acting. Australian Cash is not a lender, broker, government body, regulator or comparison service.