Correspondent Banking Explained: How Nostro and Vostro Accounts Move Money Across Borders

When a business in the United States pays a supplier in Vietnam, or a family sends money to relatives in Nigeria, the funds rarely travel directly between the two banks involved. Instead, they typically move through a chain of intermediary banks that have agreed, in advance, to handle payments for one another. This arrangement is called correspondent banking, and it is the plumbing that makes most international payments possible.

What Correspondent Banking Actually Is

A correspondent bank is a financial institution that provides services on behalf of another bank, usually one located in a different country or without direct access to a particular currency or clearing system. Rather than every bank in the world maintaining direct relationships and accounts with every other bank, banks rely on a smaller number of large, well-capitalized correspondents that already have access to major currencies, central bank settlement systems, and local clearing networks.

For example, a mid-sized bank in Southeast Asia that wants to offer U.S. dollar payments to its customers likely does not have a direct account at the Federal Reserve. Instead, it opens an account at a large U.S. bank that does have access to Fedwire, the Federal Reserve's real-time gross settlement system. That U.S. bank becomes its dollar correspondent.

Nostro and Vostro Accounts: Two Names for the Same Relationship

The terms nostro and vostro simply describe the same account from two different points of view, and understanding them clarifies how cross-border settlement works.

• Nostro account: Latin for 'ours.' From the perspective of the bank that opened the account abroad, it is 'our money, held at your bank.' A Vietnamese bank's U.S. dollar account at a U.S. correspondent is that Vietnamese bank's nostro account.
• Vostro account: Latin for 'yours.' From the perspective of the correspondent bank holding the funds, the same account is 'your money, held at our bank.' The U.S. bank refers to the Vietnamese bank's dollar account as a vostro account.
• Loro account: A less common third term, used when a bank refers to an account that a third party holds at another bank — essentially 'their account, at their bank.'

These accounts allow banks to settle obligations without physically moving currency. When the Vietnamese bank needs to pay a U.S. dollar amount on behalf of a customer, it instructs its U.S. correspondent to debit its nostro/vostro account and credit the recipient's bank, which may itself be another correspondent in a longer chain.

How a Cross-Border Payment Actually Travels

Most international wire transfers are coordinated using the SWIFT network, a global messaging system that allows banks to send standardized payment instructions to one another securely. SWIFT itself does not move money; it transmits instructions, and the actual movement of funds happens through the correspondent account relationships and, ultimately, through central bank settlement systems in each currency's home country.

A single payment can pass through two, three, or more banks before reaching its destination, particularly for less commonly traded currency pairs or when the originating and receiving banks have no direct relationship. Each additional link in the chain can add processing time, currency conversion steps, and fees, which is one reason cross-border payments have historically been slower and more expensive than domestic transfers.

Why Regulators Pay Close Attention

Because correspondent banking relationships can be used to move money across jurisdictions with limited visibility into the ultimate parties involved, they are a focus of anti-money-laundering and sanctions compliance efforts. U.S. banks acting as correspondents are subject to due diligence obligations under the Bank Secrecy Act and related regulations, and international bodies such as the Bank for International Settlements and the Financial Action Task Force have published guidance on managing these risks. In recent years, some global banks have reduced the number of correspondent relationships they maintain, a trend regulators have described as 'de-risking,' which can make it harder for banks in some smaller or higher-risk markets to access international payment networks.

Efforts to Modernize the System

Central banks and payment infrastructure providers have been working to shorten and simplify these chains. Projects linking real-time gross settlement systems across borders, expanded use of common messaging standards, and instant payment initiatives aim to reduce the number of intermediary steps and increase transparency around fees and timing for end users. The Federal Reserve, the Bank for International Settlements, and other central banks have published research and pilot programs exploring these improvements, though correspondent banking remains the dominant model for most cross-border payments today.