Nostro Account Singapore
The Foreign-Currency Account That Makes Cross-Border Bank Transfers Possible
Category: BANKING · Last updated: September 2026
A nostro account is a foreign-currency account a bank holds with another bank in a different country, used to settle cross-border transactions and hold funds in that country’s currency. Singapore banks maintain nostro accounts in USD, EUR, JPY, and other major currencies so they can process international wire transfers and trade settlements efficiently.
Not financial advice. All figures for educational reference only. Data as at September 2026.
Key Takeaways
- Nostro comes from Latin for “ours”; it refers to an account a bank holds abroad in a foreign currency, as viewed from that bank’s own perspective.
- The same account is called a vostro account (“yours”) from the perspective of the foreign bank that is actually holding the funds on the first bank’s behalf.
- Nostro accounts are what allow Singapore banks to settle international wire transfers, trade finance transactions, and foreign currency payments without converting every transaction through a third party in real time.
- Ordinary retail customers do not open nostro accounts directly; they are interbank arrangements, though customers benefit from them indirectly whenever they make or receive an international transfer.
- Nostro account balances and reconciliation are a routine part of a bank’s treasury operations, since unreconciled discrepancies can indicate settlement errors, fraud, or operational risk.
What Is a Nostro Account?
A nostro account is a bank account that one bank holds with another bank, denominated in a foreign currency relative to the first bank’s home country. For example, a Singapore bank might maintain a US-dollar account with a bank in New York, allowing it to hold, receive, and pay out US dollars without needing to convert every transaction back into Singapore dollars first. “Nostro” is Latin for “ours,” reflecting that the account is described from the holding bank’s own point of view: it is their account, held abroad.
Nostro accounts sit at the heart of how international banking and cross-border payments actually function. Because a bank in Singapore cannot directly issue or hold US dollars, euros, or other foreign currencies in the same way a US or European bank can, it relies on correspondent banking relationships, and the nostro accounts that come with them, to settle transactions denominated in those currencies on its customers’ behalf.
The concept is closely tied to correspondent banking more broadly: a nostro account is essentially the specific account-level mechanism through which a correspondent banking relationship is operationalised for currency settlement purposes.
How Does This Work for Singapore Banks?
Singapore’s major banks, DBS, OCBC, and UOB among them, maintain a network of nostro accounts with correspondent banks around the world in the currencies most relevant to Singapore’s trade and financial flows, principally US dollars, but also euros, Japanese yen, British pounds, Australian dollars, and others. When a Singapore-based customer sends a US-dollar wire transfer overseas, their bank typically debits the customer’s account and instructs its US-dollar nostro account (held with a correspondent bank, often in the US) to pay out the funds to the recipient’s bank, rather than physically moving Singapore dollars across borders.
From the correspondent bank’s perspective, the same account is called a vostro account, meaning “yours”: it is the Singapore bank’s money, but held on the correspondent bank’s books. This nostro/vostro pairing is simply the same relationship described from each side, and understanding both terms helps make sense of why cross-border payment documentation and SWIFT messaging often refer to both.
Retail and business customers in Singapore never interact with a nostro account directly, since it is purely an interbank instrument, but they benefit from it every time they make or receive an international transfer, since it is what allows their bank to settle the transaction in the correct foreign currency without a lengthy separate conversion and clearing process for every single payment.
Nostro Account Example
A Singapore-based importer needs to pay a US supplier USD 50,000 for a shipment. Their Singapore bank converts the equivalent SGD amount from the importer’s account and instructs its USD nostro account, held with a correspondent bank in New York, to transfer USD 50,000 to the supplier’s US bank account.
From the New York correspondent bank’s perspective, this same account is a vostro account: it is the Singapore bank’s money sitting on the correspondent bank’s books, drawn down when the payment instruction is executed. The importer never sees any of this machinery; they simply see the payment leave their account and arrive with the supplier, typically within one to two business days for a standard wire transfer.
Advantages of A Nostro Account
- Enables efficient cross-border settlement. Nostro accounts let Singapore banks settle foreign currency transactions directly through an established relationship, rather than routing every payment through ad hoc currency conversions.
- Supports trade finance. Businesses relying on letters of credit, trade guarantees, and other cross-border financing instruments depend on the nostro/vostro network functioning smoothly between banks.
- Reduces settlement time for international transfers. Established nostro relationships, particularly for major currency corridors like USD, generally allow faster processing than arrangements without a direct correspondent relationship.
- Provides currency diversification for banks. Holding balances across multiple nostro accounts lets banks manage foreign currency liquidity across the currencies their customers most need.
Risks and Limitations
- Settlement and reconciliation risk. Nostro accounts require regular reconciliation between the bank’s own records and the correspondent bank’s statements; unreconciled discrepancies can signal processing errors or, in rarer cases, fraud.
- Correspondent banking relationships can be withdrawn. If a correspondent bank de-risks and closes a relationship, for reasons including regulatory or compliance concerns, the Singapore bank may need to find an alternative route for that currency, potentially disrupting service.
- Exposure to the correspondent bank’s own risk. Because nostro balances are, in effect, a deposit with another institution, a Singapore bank carries counterparty risk on the correspondent bank holding its funds.
- Cross-border payments can still be relatively slow and costly for end customers. Even with an efficient nostro network, multi-bank correspondent chains for certain currency corridors can still mean transfer fees and multi-day settlement for the end customer, one reason fintech alternatives to traditional wire transfers have gained popularity.
Nostro vs Vostro Account
| Feature | Nostro Account | Vostro Account |
|---|---|---|
| Whose perspective | The bank’s own foreign-currency account held abroad | The same account, described from the correspondent bank’s perspective |
| Meaning (Latin) | “Ours” | “Yours” |
| Currency | Foreign currency relative to the account-holding bank’s home country | Domestic currency for the correspondent bank |
| Who accesses it directly | The bank that opened it (e.g. a Singapore bank’s USD account in the US) | The correspondent bank holding the funds on the other bank’s behalf |
Source: TKN research, compiled September 2026.
The Bottom Line
Nostro accounts are invisible to most bank customers, but they are the plumbing that makes it possible for a Singapore business or individual to send or receive money in a foreign currency without every transaction requiring a bespoke, ad hoc arrangement. Understanding the concept helps explain why cross-border transfers rely on correspondent banking relationships rather than a single, seamless global payment rail.