Visa and Mastercard do not move your money — banks do. The schemes set the rules, route the messages, and enforce the standards that let a card issued anywhere work almost everywhere. Understanding that layer explains most of how cards behave.
Visa and Mastercard are payment networks, not banks. They do not issue cards, hold deposits, or lend. They operate the four-party model: a cardholder's issuer, a merchant's acquirer, and the scheme sitting between them as the network that authorises, clears and settles transactions, and writes the rules everyone follows.
The genius of the model is interoperability. A card issued by a small bank in one country works at a terminal connected to a different acquirer in another, because both sides agreed to the same scheme rules and message formats. The scheme is the trust-and-standards layer; the money itself moves through the banks and their settlement banks.
Visa and Mastercard authorise, clear, settle and standardise — issuers and acquirers carry the funds and the credit risk.
Cardholder → issuer → scheme → acquirer → merchant. Amex / Diners historically ran closer to a three-party model.
The scheme sets interchange; the issuer receives it; the acquirer pays it and bundles it into the MDR.
Both Visa and Mastercard demutualised from bank-owned associations into listed companies (2008 / 2006).
Every card transaction makes a round trip. Authorisation: the acquirer sends the request through the scheme to the issuer, which approves or declines in real time. Clearing: the transaction details are exchanged and reconciled. Settlement: the net positions between issuers and acquirers are settled, scheme-side, usually through settlement banks.
The economics run on interchange — a fee, set by the scheme, paid by the acquirer to the issuer on most transactions — plus scheme fees the network charges both sides. The acquirer bundles interchange, scheme fees and its own margin into the merchant discount rate (MDR). The scheme does not "take" interchange; it sets the rate and routes the money. This distinction matters: regulators in many markets cap interchange, which reshapes the whole economics without touching the schemes' own fee lines.
| Global scheme (Visa / Mastercard) | Domestic scheme | |
|---|---|---|
| Acceptance | Worldwide | In-country (often co-badged for abroad) |
| Economics | Scheme-set, often higher | Local, usually lower interchange |
| Why it exists | Universal interoperability | Cost, data sovereignty, resilience |
| Example | Visa, Mastercard | mada, Jaywan, RuPay |
Global schemes give universal acceptance, but at a cost set abroad. That is why country after country builds a domestic scheme — mada in Saudi Arabia, Jaywan in the UAE, RuPay in India, others across Europe and beyond. Domestic schemes keep routing, data and economics inside the country, usually at lower interchange, and provide resilience against external disruption.
If you are a merchant or finance lead, the scheme layer is most of why your card costs look the way they do. The MDR is mostly interchange (scheme-set) plus scheme fees plus acquirer margin — and only the last is really negotiable. In capped-interchange markets the math is different again. Knowing which component is which is the whole game in cost conversations.
If you are a PSP or fintech, the strategic shift is that domestic schemes are not a footnote. In markets like KSA and the UAE, building global-scheme-only is increasingly a competitive disadvantage on price and a compliance risk on data. Plan routing and co-badging for the domestic scheme from the start, not as a retrofit.
The anti-hype point: card schemes are mature, dominant and not going away — but they are no longer the only game. Account-to-account instant rails (sarie, Aani, and equivalents worldwide) increasingly compete for the same payments, often at lower cost. The right answer is rarely "cards only" or "A2A only"; it is reading both layers and routing each payment to the rail that fits.