Moving money between countries is more complex than a domestic bank transfer. Because there is no “global central bank,” money does not physically cross borders Instead, value moves through a series of interlocking records and messages.
The system relies on three distinct layers: messaging, settlement, and last-mile delivery. Understanding these layers explains why traditional transfers are often slow and expensive. It also highlights how stablecoins are now providing a more efficient alternative.
The messaging layer (SWIFT and ISO 20022)
The messaging layer is the system that banks use to communicate with each other. It ensures that everyone has the same information about who is sending money to whom. However, sending a message is not the same as moving the actual value.
SWIFT: The industry standard
SWIFT is the most common messaging system for international bank transfers. It connects over 11,000 financial institutions across more than 200 countries. A SWIFT message informs the recipient bank that funds are on their way.
While secure, SWIFT is often criticized for its age and lack of real-time tracking. Newer standards like ISO 20022 are being adopted to carry more data with each message. This helps banks automate compliance checks and reduce errors in the transfer process.
The settlement layer
Settlement is the actual movement of value between the participating banks. This is where the financial records are updated to reflect the new balances. There are two primary ways banks settle international transfers today.
Correspondent banking
In the correspondent banking model, banks hold accounts with each other. These accounts, called Nostro and Vostro, allow banks to settle payments by adjusting totals. This system can be slow if a transfer has to pass through multiple “intermediary” banks.
Each intermediary bank along the path adds its own processing time and fees. This chain of relationships is a primary driver of the high cost of global transfers. The global average cost of a $200 remittance on these legacy rails is 6.5%.
Pre-funding and netting
Modern networks avoid the correspondent chain by using local liquidity pools. They “pre-fund” accounts in different countries and use “netting” to offset flows. This allows them to settle transfers much faster than traditional correspondent banking.
McKinsey estimates that “trapped capital” represents 34% of international payment costs. Managing these global pools of pre-funded cash is a significant operational overhead. Providers must predict demand carefully to ensure they always have local funds available.
Stablecoins as a complete replacement
Stablecoins like USDC or EURC are emerging as a total replacement for legacy rails. They combine messaging and settlement into a single, instant blockchain transaction. This unified approach eliminates the need for separate messaging and bank chains.
Atomic settlement
On a blockchain, the transfer of the asset and the update of the ledger happen together. This is known as “atomic settlement,” and it ensures there is no delay between layers. Funds arrive in seconds, rather than the days required for traditional bank clearance.
Total costs for these transfers drop below 1%, making micro-payments economically viable. Blockchain fees for transactions on “Layer 2” networks are typically less than $0.01. This efficiency is disrupting the $900 billion annual global remittance market.
The last-mile delivery layer
The last mile is how the recipient actually receives the final funds in local currency. This is often the most expensive and fragmented part of the whole transfer process. The methods vary significantly depending on the infrastructure of the receiving country.
Local payment rails
In many countries, money is delivered through local clearing systems like SEPA or Pix. These domestic fast-payment systems typically costs less than 1% to use. Remittance providers partner with local banks to access these rails for final delivery.
Mobile money and cash-out agents
In regions with low bank penetration, mobile wallets like M-Pesa are the primary rail. Recipients can receive funds directly to their phone any time of day or night. They can then spend the digital balance or visit a local agent to withdraw physical cash.
Orchestration providers like Bridge or BVNK help institutions manage these global rails. They provide APIs that abstract the complexity of wallet, bank, and blockchain oracle integrations. This allows businesses to offer global payments without building individual connections.
Summary of the transfer flow
An international money transfer is a coordinated dance between these different layers.
- On-ramp: The sender initiates the transfer and delivers fiat to the provider.
- Messaging/Settlement: The provider moves the value across its internal or blockchain network.
- Last-Mile: The provider delivers local currency to the recipient’s bank or wallet.
As technology improves, these layers are becoming more integrated and invisible to the user. The goal of modern systems is to make a global transfer as simple as an email. Stablecoins and digital rails are the primary tools making this global reality possible.
