SWIFT
SWIFT is the Belgian cooperative whose messaging network carries the instructions behind most international banking.
SWIFT, the Society for Worldwide Interbank Financial Telecommunication, is a messaging network that banks use to send each other payment instructions. It does not move money. When a bank in Tokyo needs to pay a bank in London, SWIFT carries the message that says how much, from which account, to which account. The actual money moves through correspondent bank accounts and central bank settlement systems. SWIFT was founded in 1973 by 239 banks from 15 countries and began operating in 1977. Its headquarters are at La Hulpe, a town outside Brussels, and it is organized as a member-owned cooperative under Belgian law. In 2025, the network connected more than 11,500 institutions across more than 200 countries and territories and carried about 60 million messages a day. The BIC code printed on international wire transfers is a SWIFT address.
How SWIFT replaced Telex
Before SWIFT existed, cross-border payment instructions traveled by Telex. Each bank used its own format, its own codes, and its own shorthand. A payment order from one country to another was a block of free-form text that the receiving bank had to read, interpret, and act on manually. The process was slow, full of errors, and easy to forge.
In 1973, a group of 239 banks from 15 countries incorporated SWIFT as a cooperative in Brussels to solve that problem. The idea was straightforward: one network, one message format, one set of codes. Every participating bank would send and receive payment instructions in the same standardized way, and SWIFT would authenticate every message so both sides could trust it.
SWIFT went live in 1977 with 518 institutions in 22 countries, already more than double the founding group. It grew because the more banks that joined, the more useful it became to every other bank. By the time anyone considered alternatives, SWIFT had become the default for international banking. Being cut off from SWIFT does not freeze a bank's assets or confiscate anything, but a bank that cannot send or receive payment instructions cannot do business internationally.
How SWIFT became a sanctions tool
SWIFT's role in geopolitics began after September 11, 2001, when American officials at the Treasury Department began secretly accessing SWIFT's transaction records to trace terrorist financing. The program that stayed secret until June 2006, when the New York Times reported on it. The disclosure caused a serious dispute between the United States and the European Union over data privacy, which ended in a negotiated agreement on American access to the data.
The first use of SWIFT as a direct sanctions tool came in 2012. The European Union ordered SWIFT to disconnect sanctioned Iranian banks from the network. The effect was severe. Iran could still pump oil, but it could not easily collect payment or move revenue through the international banking system. Iran's oil exports dropped sharply, and most analysts consider the SWIFT cutoff one of the measures that eventually brought Iran to the nuclear negotiating table. Iranian banks were reconnected under the JCPOA, the 2015 nuclear deal, and cut off again in 2018 when the United States withdrew from the agreement.
The largest SWIFT disconnection came in March 2022, when the European Union, with support from the United States, the United Kingdom, Canada, and Japan, removed major Russian banks from the network. That decision was paired with a separate action: the freezing of roughly $300 billion in Russian central bank reserves held abroad. The two measures are often described together, but they work differently. The reserve freeze took Russia's assets. The SWIFT cutoff took away Russia's ability to send and receive payment instructions through the standard global system.
The 2012 and 2022 disconnections were formally European decisions, because SWIFT is a Belgian institution subject to European law. In each case, Washington had to persuade Brussels. That structure is a real constraint, and it is the reason SWIFT is usually described as a Western instrument rather than a purely American one.
What happens when a country is cut off from SWIFT?
A bank that loses SWIFT access can still hold money, but it cannot easily tell other banks to move it. It cannot confirm incoming payments, settle trades, or process letters of credit through normal channels. International trade does not stop entirely, because banks can fall back on phone calls, faxes, or bilateral arrangements, but those workarounds are slow, expensive, and hard to scale.
Iran's experience after the 2012 cutoff showed how damaging the loss can be. Oil exports fell sharply, and the revenue Iran did earn was often stranded in accounts abroad partly because Iranian banks could not instruct foreign banks on where to send it. Russia's experience after 2022 was different, because Russia had prepared by building a domestic messaging system and because major trading partners like China and India arranged workarounds. But for most countries, losing SWIFT access would make international trade far more difficult and far more expensive.
Can SWIFT be replaced?
China launched the Cross-Border Interbank Payment System, CIPS, in 2015 to clear renminbi transactions across borders. Russia built its own messaging system, SPFS, after the 2014 sanctions that followed the annexation of Crimea. India, Iran, and other countries have experimented with bilateral payment channels that bypass SWIFT.
None of these systems is close to replacing SWIFT. By the end of 2025, CIPS had about 1,770 participants across 124 countries and regions, compared to SWIFT's 11,500 institutions in more than 200 countries and territories. CIPS still relies on SWIFT's messaging infrastructure for an estimated 80 percent of its transactions. Russia's SPFS had about 410 domestic users and 177 foreign participants from 24 countries by early 2025, and it handles mainly trade within Russia and with a small circle of partners.
The alternatives are growing, though. In early 2026, CIPS set a daily record with nearly 42,000 transactions. That is tiny next to SWIFT's 60 million daily messages, but the direction matters more than the current numbers. Countries that once treated dollar-based banking infrastructure as neutral now see it as a political risk they want to lessen. Each time SWIFT is used as a sanctions tool, it strengthens the argument inside non-aligned central banks for building a fallback before they need one.