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Let's speak the same language: a formally defined model to describe and compare payment system architectures

Author

Listed:
  • Kees van Hee
  • Anneke Kosse
  • Peter Wierts
  • Jacob Wijngaard

Abstract

Proposals for new payment system architectures abound. To understand their opportunities and challenges, it is paramount to be able to describe and compare them in a consistent and standardised manner. This paper therefore proposes a formally defined model to represent three key functions of payment system architectures: issuance/withdrawal, holding and transfer of funds. The model defines payment diagrams, using a precisely defined syntax. We illustrate the application of these diagrams for domestic and cross-border account transfers, as well as cash, card, e-money and stablecoin payments. However, the payment diagrams can be used for any type of funds and can be applied across different payment system architectures. We also demonstrate how the diagrams correspond to the balance sheet approach commonly used in economics, and that it offers added value by providing an end-to-end visualisation of every stage of the payment journey. Our model provides a tool for central banks, regulators and the payment industry to better understand and compare existing and new payment system architectures.

Suggested Citation

  • Kees van Hee & Anneke Kosse & Peter Wierts & Jacob Wijngaard, 2025. "Let's speak the same language: a formally defined model to describe and compare payment system architectures," BIS Working Papers 1259, Bank for International Settlements.
    • Handle: RePEc:bis:biswps:1259
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    More about this item

    Keywords

    payments; cash; bank accounts; correspondent banking; interoperability; two-tier banking system; cross-border payments; e-money; stablecoins;
    All these keywords.

    JEL classification:

    • E42 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Monetary Sytsems; Standards; Regimes; Government and the Monetary System
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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