🏛️ Wholesale settlement systems around the world

Settle in central bank money

A wholesale settlement system is the infrastructure that settles high-value payment obligations in a given currency. Statistically, it pairs a small number of transactions with an overwhelming share of the value exchanged. In the first half of 2025, the Reserve Bank of India’s RTGS carried 69% of the value of Indian payments and 0.1% of the volume (RBI). The same ratio holds in every system of this type. These systems settle money market operations, the cash leg of securities transactions, corporate treasury transfers, and above all the balances that retail systems pass to them at the end of each cycle.

The settlement asset is the form of money in which a payment obligation is finally discharged. It splits payment channels into two families. An obligation settled in an RTGS is discharged in central bank money: the debtor transfers a balance held in its account at the central bank, and that balance carries no credit risk. An obligation settled at a correspondent bank is discharged in commercial bank money, which leaves the creditor exposed to that correspondent’s failure. This single criterion ranks payment rails from safest to most exposed.

Direct access requires a settlement account at the central bank, a membership agreement, and the capacity to operate without interruption. Many institutions forgo it and go through a direct participant instead. This indirect participation, or tiering, accounted for 13.4% of the value sent and 10.2% of the value received in T2 in 2025 (ECB). The sponsored institution sends and receives payments within its sponsor’s operating hours and under the limits the sponsor grants. Its capacity to send is capped by the sponsor’s availability, not its own.

Gross or net: the trade-off that shapes everything

Real-time gross settlement processes each order individually and with finality, provided the payer has the funds. Orders are never offset against one another. No delay separates execution from finality, and no credit exposure remains after settlement. The price of this safety is liquidity: settling 100 transactions of 10 million requires funding 1 billion, even if incoming flows cover them by the end of the day.

Deferred net settlement multilaterally nets the reciprocal obligations built up over a period, and each participant then settles only its balance. Orders flow throughout the period, and settlement covers the resulting balance, not each individual order. CHIPS reports an efficiency ratio of about 26 to 1 in 2025: each dollar of funding supports roughly $26 of settled value (The Clearing House). Between the exchange of orders and the settlement of the balance, each net creditor bears the risk that its net debtors default.

EURO1 is the euro wholesale payment system that EBA Clearing operates on a net settlement basis, and no system takes that model further. It brings together 33 participating banks and more than 4,800 BICs, handling about 180,000 payments and €200 billion a day. Of that volume, 95% of transactions settle in real time at system level and more than 99% within 30 minutes (EBA Clearing, page accessed in 2026). EURO1 thus offers a private alternative to T2 for routing and clearing payments. Discharge in central bank money still happens only when the balance settles, not when payments are exchanged within the system.

The euro: T2 and the TARGET family

Since March 2023, T2 has run on two separate components, where a single account used to carry both treasury and settlement. CLM (Central Liquidity Management) holds the main cash account, the relationship with the national central bank, and monetary policy operations. The RTGS component holds the dedicated accounts where payments settle, and participants fund those accounts from CLM during the day through liquidity transfers. An institution connected to T2 therefore tracks two balances and must fund its RTGS account from CLM before sending payments. This split is the first constraint that any treasury engine talking to T2 has to model.

T2 traffic breaks down by transaction type, and the breakdown contradicts a common assumption. Customer payments made up 64.9% of T2 volume in 2025, against 26.8% for interbank payments (ECB). Alongside trading-desk flows, an RTGS therefore carries large commercial transfers and urgent corporate payments. Geographic concentration remains high, with 39.8% of the value in Germany, 18.1% in France, and 7.2% in Belgium.

The dollar: two rails, one final settlement asset

The US runs two wholesale systems side by side, with different settlement models and different operators. The Fedwire Funds Service, operated by the Federal Reserve Banks since 1918, settles gross in central bank money, irrevocably and immediately, with no credit risk. CHIPS, operated by The Clearing House Payments Company since 1970, settles on a continuous net basis among 43 direct participant banks. It is the de facto rail for cross-border dollar payments.

The ISO 20022 migration on July 14, 2025, retired Fedwire’s proprietary FAIM format. Every US integrator now speaks pacs.008 and pacs.009, like its European and British counterparts. The change affects data structure as much as message syntax. Structured originator and beneficiary fields now feed sanctions screening and anti-money laundering controls directly. The originator’s address, once squeezed into a 35-character free-text field where it was often truncated, now has dedicated elements.

The Fedwire Securities Service, in operation since 1968, settles Treasury and agency securities on a delivery-versus-payment basis. It shares participants’ reserve accounts with Fedwire Funds, but the two rails remain separate. Mapping both services to a single line in the account master data produces false reconciliation matches at every bond maturity.

Sterling and the Canadian dollar: two recent overhauls

CHAPS has settled sterling since 1984, and the Bank of England has operated it since November 2017, when it took over from CHAPS Clearing Company. The UK central bank thus holds three roles with separate reporting lines: operator, provider of settlement accounts, and overseer. The system carries property transactions, market operations, and interbank settlements. A large incoming payment in the UK routinely goes through it, whether it is interbank or tied to a property transaction.

The UK overhaul took place in two steps of a different kind. On June 19, 2023, CHAPS payments migrated to ISO 20022 messaging. On April 28, 2025, the Bank of England replaced the ledger and the settlement engine themselves with RT2. A format migration changes the grammar of the messages exchanged, while a core migration replaces the component that holds participants’ balances. The two projects therefore carried neither the same risk nor the same testing schedule. Correspondent banks that had prepared only for the format migration met the second step in production.

Canada took a similar path. Lynx, operated by Payments Canada under Bank of Canada oversight, went live in the summer of 2021, replacing LVTS, whose collective-collateral model left participants with residual risk. Release 2, in March 2023, introduced ISO 20022, and the coexistence of MT and MX messages ended in November 2025. Since then, only the richer format has been accepted.

• Format is not data. Migrating to pacs.008 without populating the structured originator fields reproduces the flaws of MT103 inside an XML envelope.
• Coexistence periods end. MT and MX ran side by side on Lynx until November 2025; a connector still on MT no longer gets through.
• Truncation becomes a compliance failure. Structured address fields are validated, and a format reject means a payment that does not settle that day.
• Internal reference data must follow. Finality codes, reject reasons, payment purpose codes: ISO 20022 values must replace in-house codes, not duplicate them.

Asia and the large emerging markets: the other giants

India’s RTGS, run by the Reserve Bank of India since 2004, is one of the few in the world open 24 hours a day, seven days a week, as it has been since December 14, 2020. It has a minimum of 2 lakh rupees (₹200,000). This floor keeps retail payments out without restricting operating hours, since the two parameters are set independently. In China, CNAPS’s HVPS makes the opposite choice and sticks to business hours.

Hong Kong’s position is unique: HKICL runs four separate RTGS systems on one infrastructure, in Hong Kong dollars, US dollars, euros, and renminbi. USD CHATS settles dollars outside the US, with HSBC as the settlement institution, which shifts the risk to a commercial bank. This setup makes intra-Asian payment-versus-payment settlement possible without depending on Fedwire’s operating hours, a capability few other financial centers offer.

CIPS is the settlement system for cross-border renminbi, operated since 2015 by CIPS Co. It combines real-time gross settlement with deferred net settlement and also accepts the Hong Kong dollar. It had 210 direct and 1,619 indirect participants as of June 30, 2026 (CIPS), yet its messaging still depends on SWIFT for more than 80% of its flows. A settlement system and a messaging network perform two separate functions. CIPS provides the first without replacing SWIFT for the second.

Operating hours and the cost of cross-border payments

How long a cross-border payment takes depends more on the operating hours of the systems involved than on the technology. As long as the RTGS of the receiving currency is closed, no final credit can reach the beneficiary’s account, whatever the message format. Time zones shrink the hours that systems share. A yen payment sent from Frankfurt at 15:00 CET arrives after the Japanese close, while a euro instruction sent from Sydney leaves before Europe opens. The operating calendars of the two systems therefore set the earliest possible settlement date.

The CPMI has formalized this constraint as the global settlement window: the period when the largest number of RTGS systems are open at the same time. Its final report of May 2022 places the window between 06:00 and 11:00 GMT on business days, or five hours a day. A cross-border payment submitted outside this window settles at the next opening. That gap carries FX risk on the open position and a liquidity cost on the funds tied up.

Within a single currency area, operating hours vary by payment layer. TIPS settles in central bank money 24/7/365 and reported 99.99% availability in 2025, while T2 shuts down every evening and on weekends. An instant payment received on a Sunday is therefore final the same day, whereas a wholesale transaction submitted at the same moment settles only when T2 reopens. This asymmetry explains the current regulatory pressure on wholesale system hours.

FX settlement risk, and what CLS neutralizes

Herstatt risk, or FX settlement risk, is the exposure a party to a currency trade faces once it has paid away its currency without yet receiving the countervalue. It is named after Bankhaus I. D. Herstatt. On June 26, 1974, West Germany’s banking supervisor, the Bundesaufsichtsamt für das Kreditwesen, withdrew the bank’s license at the end of the German banking day, around 3:30 p.m. Frankfurt time, after counterparties had already paid their deutsche marks in Frankfurt. They were waiting for dollars in New York, where the business day had only just begun, and never received them. The exposure comes from the gap between operating hours: each party pays its own currency before the system for the other currency is able to credit it.

CLSNet calculates automated bilateral netting for more than 120 currencies that are not eligible for CLSSettlement, which partly fills this gap. The service stops at calculating the balance, and the parties then settle the net amount bilaterally through their correspondents. Liquidity needs fall in proportion to the netting achieved, but settlement risk still applies to the balance left to pay. The two services meet different needs. Treating them as equivalent leads firms to underestimate an exposure that liquidity dashboards do not show.

Operating: what to check before you commit

An institution can connect to a wholesale settlement system in three ways. It can be a direct participant, reach the system through a participant that sponsors it, or depend on it through a chain of correspondents. The third route is the most common and the least documented. The longer the chain, the further the times quoted to customers drift from actual times, because each link adds its own cut-offs.

• The customer cut-off for each rail, which differs from the closing time, and again from the internal cut-off set by the bank or PSP.
• The calendar of non-business days, which differs across currencies and does not match local public holidays: a three-day weekend on one side shifts the whole chain.
• The point of finality: the step at which the payment becomes irrevocable, and who bears the risk before then.
• CLS eligibility of both currencies for any FX trade, and the amount actually exposed if one of them is not eligible.
• The format and its version: ISO 20022 is not a single format, and each system publishes its own usage restrictions and mandatory fields.
• Incident behavior: T2 had two major-impact incidents in 2025 and 99.8% availability; fallback procedures must be tested, not just written.

These infrastructures are overseen under a common framework, the Principles for Financial Market Infrastructures, published in April 2012 by the CPSS (now the CPMI) and IOSCO. The principles set requirements for governance, credit and liquidity risk management, finality, and business continuity. Each system designated under them publishes a self-assessment against every principle. That public document describes how the rail actually works, and it remains the most reliable source available on the subject.