“The plumbing behind every international wire transfer.” Correspondent banking is the arrangement by which one bank (the correspondent) holds accounts for and processes transactions on behalf of another bank (the respondent), enabling cross-border payments without direct bilateral relationships.
Executive Summary
The global payments system depends on a web of correspondent banking relationships — typically anchored by large U.S., European, and Japanese banks that hold nostro/vostro accounts for thousands of smaller institutions worldwide. This infrastructure is invisible to most businesses but critical to every international trade transaction, remittance, and foreign currency payment. Since 2012, de-risking by major correspondent banks — driven by sanctions compliance costs, AML regulations, and reputational concerns — has caused a significant contraction of correspondent banking relationships in high-risk jurisdictions, leaving entire regions with degraded financial access.
The Strategic Mechanism
Correspondent banking works through a chain of account relationships:
- Nostro/vostro accounts: Bank A holds a “nostro” account at Bank B in Bank B’s currency; from Bank B’s perspective, this is a “vostro” account. Payments route through these pre-funded accounts
- The dollar clearing chokepoint: The vast majority of dollar transactions — regardless of counterparty nationality — must clear through a U.S. correspondent bank, giving U.S. regulators oversight over global payments
- CHIPS and Fedwire: The two U.S. dollar clearing systems through which nearly all large-value dollar transactions settle; exclusion from these systems is functionally catastrophic for any bank
- Compliance asymmetry: Large correspondent banks bear regulatory risk for their respondents’ clients — a risk they increasingly manage by terminating relationships with high-risk jurisdictions rather than investing in enhanced due diligence
Market & Policy Impact
- The number of active correspondent banking relationships globally declined by roughly 25% between 2011 and 2022, according to BIS data, with the steepest drops in the Caribbean, Pacific islands, and parts of Africa
- Small island developing states and some Central Asian countries have faced near-total loss of dollar correspondent access, forcing reliance on informal transfer channels
- Sanctions enforcement relies on correspondent banking as its primary transmission mechanism — a bank cut off from correspondents cannot process dollar payments for its clients
- Fintech and crypto payment rails are partly filling gaps left by de-risked correspondent relationships in underserved corridors
- FATF (Financial Action Task Force) grey-listing of a country triggers accelerated correspondent banking de-risking, creating a feedback loop of financial exclusion
Modern Case Study: The Caribbean De-Risking Crisis, 2015–2025
Caribbean nations — including Belize, Antigua, and several Eastern Caribbean Currency Union members — have faced severe correspondent banking attrition since the mid-2010s, as major U.S. and Canadian banks terminated relationships citing AML risk and compliance costs disproportionate to transaction volumes. By 2024, some Caribbean central banks were struggling to maintain dollar clearing at all. The crisis forced regional governments to explore CBDC solutions, with the Eastern Caribbean Central Bank’s DCash project — one of the world’s first retail CBDC deployments — partially motivated by correspondent banking fragility. The episode illustrates how regulatory architecture in one jurisdiction can produce financial exclusion thousands of miles away, with no deliberate sanctions intent required.