Real-time gross settlement (RTGS) systems

Real-time gross settlement (RTGS) systems settle individual payment obligations continuously and with finality in central-bank money. Gross settlement means that payments are not first offset into a single net obligation. Real time means that accepted instructions can settle during operating hours rather than at a deferred cycle. The technology reduces settlement credit risk but requires participants to manage intraday liquidity.

A payment instruction is not settlement. Messaging communicates an instruction; validation checks format, authority and funds; queueing manages timing; liquidity facilities support settlement; and the central bank changes account balances. CHIPS (Clearing House Interbank Payments System) is a private-sector dollar system with netting and liquidity-saving arrangements whose final positions relate to central-bank money. Correspondent banking and Nostro/Vostro architecture gives indirect institutions access through account relationships.

Fedwire Funds Service is operated by the United States Federal Reserve Banks. The Eurosystem's T2 platform provides real-time gross settlement for euro payments. The Bank of England's renewed RTGS service, RT2, went live on 28 April 2025 and supports CHAPS and other settlement services. These arrangements differ in access, hours, liquidity tools and legal rules. They should not be collapsed into one global rail.

RTGS infrastructure is not itself sanctions coercion. Central banks build it principally for monetary and financial stability. Strategic pressure arises when a competent authority lawfully restricts an institution or when direct participants apply binding controls. Dollar-clearing denial may exploit dependence on dollar settlement, but a blocked payment can also reflect fraud controls, insufficient liquidity, an operational error or a correspondent decision. The system event alone does not establish intent.

Access is tiered. Direct participants hold or reach settlement accounts; indirect banks depend on correspondents. CIPS provides renminbi payment and settlement arrangements with a different participant and currency structure. It may reduce some dependence on Western channels, but it does not substitute for final settlement in dollars, euros or sterling. Currency demand, participant reach, liquidity and legal finality constrain substitution.

Operational resilience is central. An outage, cyber incident or liquidity shortfall can delay payments even without state action. Queues, contingency arrangements, alternate sites and recovery procedures address those risks. A central bank can alter access policy, but the consequences depend on correspondents and alternative currencies.

RTGS is therefore enabling infrastructure within Economic statecraft, not evidence of economic warfare. Its strategic significance comes from the combination of sovereign currency, central-bank account control and network dependence. Classification must distinguish ordinary settlement, defensive resilience and a specific legal denial.

Finality is legal as well as technical. System rules determine when an instruction becomes irrevocable, while insolvency and settlement law protect completed transfers. Operators also manage operating hours, queuing priorities and emergency procedures. These design choices shape liquidity demand and resilience, but they do not themselves identify a sanctions target or authorise a participant to reject a payment.

Sources

• CPMI, Real-Time Gross Settlement Systems
• Federal Reserve Financial Services, Fedwire Funds
• European Central Bank, T2
• Bank of England, renewed RTGS service goes live, 30 April 2025