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Real-time gross settlement is a payment system operated by a country's central bank that processes each interbank payment individually and immediately, settling it in central bank money as soon as it arrives rather than accumulating payments into a batch and netting them at the end of the day. Once settled, the payment is final and irrevocable. The receiving bank cannot give the money back and the sending bank cannot reverse the instruction. Every major economy in the world runs a real-time gross settlement system as its primary high-value payment infrastructure.
Think of it as a direct vault-to-vault transfer between two banks, with the central bank confirming each one the moment it happens.
The three words in the name are not interchangeable, and each reflects a deliberate design choice.
Before real-time gross settlement systems, interbank payments accumulated throughout the day and settled in a single net batch at the close of business. This created settlement risk: if one bank in the chain defaulted during the day before the batch settled, all the payments it owed were suddenly uncovered, potentially cascading through the system and destabilizing banks that had extended credit based on expected incoming flows.
Real-time gross settlement eliminates that risk by removing the time lag entirely. Each payment settles immediately and finally. No bank ever has a claim on another bank's future settlement that might not arrive.
Every major economy runs its own system under a different name. The United States uses the Fedwire Funds Service, operated by the Federal Reserve, which launched in 1970 as an evolution of a telegraph-based transfer system. The United Kingdom uses the Clearing House Automated Payment System, run by the Bank of England. The eurozone uses T2, owned and operated by the European Central Bank, which processes payments with a combined value close to the entire euro area gross domestic product every six days. India operates its own system called RTGS, run by the Reserve Bank of India, used for high-value transactions above a minimum threshold of approximately 200,000 rupees. As of 1985, three central banks had implemented real-time gross settlement systems. By 2005, more than 90 had done so.
Real-time gross settlement is not a retail payment system. You do not use it when you pay a restaurant or transfer money to a friend. Commercial banks, the central bank itself, and large institutions use it for high-value interbank transactions: settling overnight interbank loans, funding securities purchases, transferring large corporate payments, and meeting collateral obligations at central clearing counterparties.
The high-value threshold varies by country. In the United States, Fedwire processes any dollar amount, but in practice it is used for large transfers because the fee structure makes it economical only at higher amounts. In India, the minimum threshold ensures that routine consumer transactions go through lower-cost batch systems while significant transfers use real-time gross settlement.
In a deferred net settlement system like the Automated Clearing House in the United States, payments accumulate in batches and settle once or several times per day. The net amounts owing between banks are calculated and only the differences move. This is more liquidity-efficient because banks only need to fund the net position rather than each individual gross payment. But it reintroduces the intraday credit risk that real-time gross settlement was designed to eliminate.
Most modern economies run both systems in parallel: real-time gross settlement for large, time-critical payments where finality matters, and deferred net settlement for high volumes of smaller consumer and business payments where cost efficiency and batch processing are adequate.
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