How International Bank Transfers Work

How It Works

Your bank almost certainly does not have a direct relationship with most banks in other countries. It cannot directly debit an account at a bank in Vietnam or credit one in Brazil without an intermediary. The solution is correspondent banking: a network of large international banks that maintain accounts at each other to route international payments on behalf of smaller institutions.

Here is what actually happens when you send a wire transfer internationally. Your bank sends a SWIFT message to its correspondent bank — likely a major institution like JPMorgan, Citibank, or HSBC. The correspondent bank, which has accounts at banks in many countries, routes the payment toward the destination country, possibly through one or two additional correspondent banks. The final correspondent bank credits the recipient's local bank, which credits the recipient's account.

At each step, the correspondent bank takes a fee — typically $10 to $35 — and may take a spread on the currency conversion. End-to-end, a $1,000 international transfer might lose $30 to $75 in fees and exchange rate markups. The transfer takes 1 to 5 business days because each institution in the chain needs to verify the message, check compliance requirements, post entries in its own systems, and pass the instruction along during its own business hours.

The time delay is not a technical limitation — it is the product of multiple organizations operating sequentially, each with their own end-of-day batch processing. It is literally the result of money sitting in someone's books overnight waiting for business hours to resume.

Why It Matters

International transfer friction is not equally distributed — it falls hardest on the most economically vulnerable populations. Immigrant workers who rely on remittances to support families abroad pay a disproportionate share of their income in transfer fees. Small businesses in developing countries pay more for dollar-denominated international trade finance. Individuals in countries with limited banking access cannot access the global payment system at all.

Blockchain-based payment networks demonstrate concretely that this friction is unnecessary. Transactions that currently take days and cost $30+ can settle in seconds for fractions of a cent. The technical infrastructure for better international payments exists today — the obstacle is regulatory and institutional inertia, not technology.

Real-World Example

A construction company in Germany wants to pay a material supplier in India for $50,000 worth of steel. It initiates a wire transfer on Monday morning. The wire leaves the German bank, reaches a European correspondent bank by Tuesday, reaches an international correspondent bank Wednesday, arrives at the Indian bank Thursday morning, and credits the supplier's account Friday afternoon — 5 business days. The supplier has received $49,200 after $800 in fees across the chain. On a stablecoin network, the same payment would arrive in under a minute for $5.