Flow of Fundsby Fintech North

From a card tap to settlement: the four-party model (Visa as the example)

When you tap a card, an authorization is a real-time check and hold that moves no money; the network switch routes that message and later the clearing records, and only afterward do the banks settle the actual money, typically funding the merchant a day or two later, net of fees.

Founders, product, and ops people who see a card payment as one instant event and don't realize auth, clearing, and settlement are separate.

The four-party model connects a cardholder, the merchant, the merchant's acquirer, and the cardholder's issuer, with a card network acting as the switch between the banks. A tap first triggers an authorization, a real-time check and hold, with no money moving. Later the transaction clears (records are exchanged) and the banks settle the real money, typically a day or so afterward. The merchant is funded net of the merchant discount, and interchange is generally netted into the settlement between the banks rather than sent as a separate payment.

The flow at a glance

CardholderMerchantAcquirerCard networkIssuer1Tap card2Auth request3Route auth request4Forward auth request5Approve, place hold6Approval, sale done7Banks settle net8Fund merchant net9Chargeback claws back
money (funds move) message (instructions) exception

Who’s involved

Cardholder
Person tapping or inserting the card to pay
Merchant
Business accepting the card and expecting to be funded
Acquirer
The merchant's bank/processor that submits transactions into the network
Card network
Visa or Mastercard acting as the switch that routes messages between acquirer and issuer (message layer)
Issuer
The cardholder's bank that approves or declines and ultimately owes the funds

How it moves, step by step

  1. 1
    messageCardholder

    The cardholder taps; the terminal captures the card details and sends an authorization request into the acquirer.

  2. 2
    messageCard network

    The network switch routes the authorization request from the acquirer to the correct issuer.

  3. 3
    messageIssuer

    The issuer checks the account for funds or credit and risk, then approves or declines, typically placing a hold on the cardholder's available balance. No money has moved yet.

  4. 4
    messageMerchant

    The approval travels back through the network to the terminal, and the merchant completes the sale.

  5. 5
    messageAcquirer

    Later, often in a batch, the acquirer submits the captured transactions for clearing, exchanging the records that compute who owes whom. Still messages, not money.

  6. 6
    moneyIssuer

    Through the network's settlement process, the issuer's and acquirer's banks settle the net positions; this bank-to-bank money movement is when funds become final.

  7. 7
    moneyAcquirer

    The acquirer funds the merchant for the sale, typically a day or two after the transaction (often described as T+1 or T+2).

  8. 8
    moneyMerchant

    The merchant receives the deposit net of the merchant discount rate, the bundled fee that typically covers interchange, network fees, and the acquirer's margin.

  9. 9
    exceptionCardholder

    If the cardholder later disputes the charge, a chargeback can claw funds back from the merchant through the network, separate from this forward flow.

money: funds actually move message: instructions, no money yet exception: reversal / dispute

When it’s final

Authorization is real time at the tap, but clearing and settlement follow afterward; merchants are commonly funded around T+1 to T+2, and exact timing varies by acquirer, card program, and country.

Common misconceptions

  • Myth: When the card is approved at the terminal, the money has been taken and moved to the merchant.

    Reality: Approval is just an authorization, a check and a hold on the cardholder's balance. The actual money moves later through clearing and settlement between the banks; the merchant is typically funded a day or two afterward.

  • Myth: Interchange is a separate fee the merchant pays out to Visa or Mastercard.

    Reality: Interchange generally flows between the banks and is netted within settlement, not sent as a standalone payment. The merchant typically sees it bundled inside the merchant discount, and the network itself mostly routes messages rather than moving the money.

  • Myth: Interac Debit in Canada works the same way, with a hold now and the money captured later.

    Reality: Interac Debit works differently: it is a single-message, good-funds rail, so approval and the debit to the customer's account happen together in real time, with no hold-then-capture and no chargebacks. The banks still settle with each other later, which is why the merchant is still funded on a delay.

See it in the studio

Show the Visa four-party model end to end, clearly separating the authorization and hold from the later clearing and settlement money movement.Use to make the auth vs clearing vs settlement distinction visible.Diagram an Interac Debit purchase showing how the network switch routes the authorization message while the cardholder's and merchant's banks settle the real money.Good for contrasting a debit rail with the credit-card four-party flow.Visa four-party modelAudited template, loads instantlyInterac DebitAudited template, loads instantly

Terms in this guide

AuthorizationClearingSettlementInterchangeChargebackIssuerAcquirerProcessor3-D Secure (3DS)Payment GatewayPayment Service Provider (PSP)ReconciliationSponsor bankTokenization

Sources

  • Visa Core Rules and Visa Product and Service Rules ↗ · Visa (operator). Network rules covering authorization, clearing, settlement, and the roles of issuer and acquirer.
  • Mastercard rules and standards ↗ · Mastercard (operator). Hosts the Mastercard Rules and Transaction Processing Rules covering the four-party scheme, clearing, and settlement.
  • Interac Debit ↗ · Interac (operator). Canada's debit network for in-person and online purchases; the network switch routes transactions between the buyer's and merchant's banks.

Educational, plain-English explainers. Not legal, compliance, tax, or financial advice. These cover fundamentals, not current fees, limits, or rates (which change). Rails and parties vary by program and country, so verify specifics against primary sources. Last reviewed June 2026.