Correspondent Banking: Nostro & Vostro

By Ryan O'Connell, CFA, FRM Published November 6, 2026

A business can pay an overseas supplier in U.S. dollars even when their banks have no accounts with each other. Correspondent banking connects them through banks that provide account and payment services. Nostro and vostro accounts describe the deposit balances that make those connections work.

Understanding the accounts helps explain where a payment’s value is recorded, why a message is different from completed settlement, and why a well-funded customer can still encounter a payment delay. This U.S.-oriented guide follows one hypothetical dollar payment, then examines settlement rails, liquidity, anti-money-laundering controls and the narrower role of foreign-exchange settlement services.

What Is Correspondent Banking?

A correspondent bank provides banking services to another bank, the respondent bank. A common arrangement involves the correspondent holding a deposit for the respondent and processing payments against it. The relationship gives the respondent access to services or a currency’s payment infrastructure without maintaining its own operation in every market.^[1]

The roles depend on the service being provided. A bank can act as a respondent for its dollar payments and as a correspondent for another bank’s payments in a different currency. The relationship need not be reciprocal. Its commercial agreement sets the services, responsibilities and account terms.

Correspondent services can include payment processing, cash management and foreign-exchange services. This article concentrates on the accounts behind a payment. The choice of commercial payment terms, such as a letter of credit or open account, is a separate decision covered in international trade finance and cash management.

Nostro vs. Vostro: Two Views of One Deposit

Nostro means “ours”: the respondent describes its deposit with another bank as our account with you. Vostro means “yours”: the servicing correspondent describes that same deposit as your account with us.^[16] For an ordinary positive deposit balance, the respondent owns an asset and the correspondent owes a liability.

Suppose Harbor Bank holds a positive USD deposit at Atlantic Correspondent. Compare the two banks’ records of that one relationship. No exchange of currencies is required to change the account’s name; the name changes with the viewpoint.

Harbor’s asset and Atlantic’s liability mirror one another. They are not two pools of money to add together. The same asset/liability distinction applies to a business’s bank deposit: it is the business’s asset and its bank’s liability. Central-bank reserves are another claim, owed by the central bank to the eligible institution holding them.^[2]

These labels describe the account relationship, not a special investment product or a guarantee of safety. An overdraft introduces a credit exposure and requires a different analysis. The worked example keeps all correspondent balances positive. For the wider distinction between deposit funding and bank assets, see bank balance sheet management.

A USD Payment Through One Shared Correspondent

Before the payment, Summit has USD 150,000 at Harbor and Cedar has USD 10,000 at Meridian. Harbor has USD 100,000 at Atlantic; Meridian has USD 60,000 there. The following are selected accounts, rather than complete bank balance sheets. A bank’s customer deposits need not equal its balance in one correspondent account.

1. Harbor Reduces Summit’s Deposit and Its Own Nostro Asset

Harbor executes Summit’s payment using its deposit at Atlantic. Because a customer deposit is a bank liability, debiting Summit’s account reduces what Harbor owes Summit. Crediting Harbor’s nostro reduces its asset due from Atlantic. The debit/credit rules depend on the account type; see double-entry accounting for the foundation.

Harbor’s assets and liabilities each fall by $40,000. Summit’s deposit becomes $150,000 − $40,000 = $110,000, while Harbor’s nostro becomes $100,000 − $40,000 = $60,000. Harbor has not incurred a $40,000 bank expense.

2. Atlantic Transfers Between Its Two Deposit Liabilities

Atlantic debits the account it services for Harbor and credits the account it services for Meridian. Both accounts are liabilities on Atlantic’s books. This is the shared correspondent’s internal book transfer, a structure illustrated in the CPMI’s correspondent-banking report.^[1]

Atlantic now owes Harbor $60,000 and Meridian $60,000 + $40,000 = $100,000. Its total liability to the two banks remains unchanged. Its own Federal Reserve balance does not change because of this internal transfer. Any earlier funding of these correspondent accounts is already reflected in the opening balances.

3. Meridian Increases Its Nostro Asset and Cedar’s Deposit

After the settled credit is confirmed, Meridian records the additional claim on Atlantic and credits Cedar’s USD customer account. Crediting a deposit increases Meridian’s liability to its customer.

Meridian’s assets and liabilities each rise by $40,000. Its nostro becomes $100,000, and Cedar’s deposit becomes $10,000 + $40,000 = $50,000. The deposit credit is not $40,000 of revenue for Meridian.

Closing Balances and Reconciliation

Now compare each selected opening balance with the completed entry. “Decrease” and “increase” below describe the account balance, independently of whether the journal used a debit or a credit.

Three checks explain the result:

• Each bank’s entry balances: $40,000 of debits equals $40,000 of credits. Recording the transaction across three banks does not create three customer payments.
• The correspondent claims match: Harbor’s $60,000 and Meridian’s $100,000 assets match Atlantic’s two closing deposit liabilities. Their sum is $60,000 + $100,000 = $160,000, the same as the opening $100,000 + $60,000.
• The selected customer deposits reconcile separately: $150,000 + $10,000 = $160,000 before, and $110,000 + $50,000 = $160,000 after. This conservation follows the example’s assumptions; it is not a general rule equating customer deposits with nostro balances.

The payment changes who holds claims on which bank. It creates no bank profit or equity change in this fee-free example, and no FX trade is needed merely because the customers are in different countries.

Payment Messages vs. Settlement

A message tells an institution what it is being asked to do. Settlement discharges the relevant payment obligation through the applicable account entries or system mechanism. Finality identifies when that settlement becomes final under the governing rules and law. Distinguish all three when interpreting a payment confirmation.

Swift describes its core service as secure financial messaging: participating institutions perform the actual funds transfers. ISO 20022 provides a common framework for financial message definitions and structured data. Neither the messaging network nor the message standard is itself Harbor’s deposit at Atlantic.^[3][4]

In the example, Atlantic’s deposit liabilities provide the settlement medium for the transfer between its two bank customers. The example assumes that transfer is settled under the account arrangements. A Swift message or ISO 20022 identifier alone cannot establish that legal result.

Some arrangements send payment information along the bank chain; others send customer information toward the beneficiary bank while a separate cover route supplies funding. Reconciliation must connect the information with the actual funds received. The existence of an instruction is not permission to treat an unfunded expected receipt as settled cash.^[1]

When Different Correspondents Use Fedwire or CHIPS

Change the network: Harbor now uses one U.S. correspondent and Meridian uses another. Their correspondents need a way to settle between themselves. Depending on participation, routing and account arrangements, a USD leg can use Fedwire or CHIPS. These are possible routes, not a mandatory sequence through both systems.

For a Fedwire leg, the sending correspondent reduces its Federal Reserve asset and the receiving correspondent increases its Federal Reserve asset. Their respondent-account entries connect that interbank settlement to Harbor and Meridian. Fedwire finality applies at the receiving-participant layer; it does not establish that every downstream customer account has already been credited.^[5]

CHIPS combines prefunding with continuous intraday settlement. Its funding and payout arrangements involve Federal Reserve money, but a released CHIPS payment does not wait for a separate end-of-day Fedwire transfer to become final. The current CHIPS rules and operator disclosure distinguish queued instructions from payments released and finally settled.^[6][7]

A shared-correspondent book transfer, a direct relationship and a route with additional intermediaries can look different. The relevant questions are which accounts connect the institutions, which system is actually used, and where finality occurs. The broader digital payment systems article compares payment infrastructure, while the Federal Reserve System guide explains the central bank’s institutional role.

Liquidity, Prefunding and Reconciliation

Customer Funds and Bank Payment Capacity Are Different

Summit’s opening $150,000 deposit is Harbor’s liability; Harbor’s $100,000 nostro is a separate asset. A customer having enough money does not establish that its bank has immediately usable liquidity in every currency and every correspondent account.

A respondent can maintain prefunded balances, arrange credit where available, or move liquidity between accounts. The applicable arrangements determine what is possible. Prefunding means placing funds ahead of the payment need; it ties up usable resources. Credit can reduce that need but introduces terms, limits and exposures. Do not infer that every correspondent payment is fully prefunded or that credit is automatically available.

In the example, Harbor can fund the $40,000 payment from its $100,000 balance. A delay in replenishing a different account could still constrain a later payment. The general importance of currency-specific liquidity, payment deadlines and contingency funding is emphasized in the Basel Committee’s settlement-risk guidance.^[13]

Reconcile the Bank’s Record with the Correspondent’s Record

Harbor should be able to match its $60,000 closing nostro asset to Atlantic’s statement of the $60,000 owed to Harbor. Meridian performs the equivalent comparison for its $100,000 claim. A difference needs explanation, such as a payment still in transit, a charge, a booking-date difference or an error.

Reconciliation compares transaction references, amounts, currencies, dates and balances, then investigates unmatched items. A bank’s internal expected balance is not proof that its correspondent has finally credited the funds. Timely confirmation reduces that uncertainty; the legal/account terms identify the relevant finality point.^[13] This is an important connection between payment operations and working capital management: a receivable’s expected collection and usable funds can occur at different times.

Intermediary Banks and Nested Relationships

An intermediary bank performs a role in a particular payment route between the originating and beneficiary banks. A payment may need an intermediary when the endpoints lack a direct account connection. Adding an intermediary creates another operational link to identify and reconcile.

Nested, or downstream, correspondent banking describes an ongoing access arrangement: one bank uses another respondent bank’s correspondent relationship. A smaller bank might access Atlantic through Harbor instead of maintaining its own direct Atlantic account. Harbor is Atlantic’s direct respondent; the smaller bank receives access indirectly.

Nesting is a legitimate part of correspondent banking, but it can make the underlying institutions and activity less visible. Current Basel guidance calls for disclosure of nested use, understanding its purpose and controls, and case-specific risk assessment. A payment having an intermediary does not, by itself, establish that an undisclosed nested relationship exists.^[12]

Fees, Value Dates, Cutoffs and Transfer Timing

The fee-free ledger example isolates bookkeeping. For an actual payment, distinguish the amount instructed, the payer’s total debit and the beneficiary’s net receipt. Ask which charges the payer bears, whether intermediaries or the receiving bank can deduct charges, and whether any conversion introduces a separate FX rate or spread. The agreed service and charge arrangement matters.

A value date is the agreed date for placing a payment or transfer at the receiving user’s disposal and is also a reference for interest calculations.^[17] Check which receiving account the date refers to; a scheduled value date is not proof that every step occurred as planned. Also distinguish the customer’s request date, bank booking dates and actual settlement confirmation.

Cutoffs, operating days, holidays, time zones, liquidity, incomplete beneficiary information and compliance inquiries can affect the chain. CPMI identifies operating hours, funding costs, long transaction chains and poor data as distinct cross-border payment frictions.^[15]

Consequently, “a Swift transfer takes a fixed number of days” is an unreliable general rule. Some payments complete quickly; others require repair or investigation. Even reaching the beneficiary bank differs from crediting the beneficiary’s account, a distinction Swift itself identifies.^[3] Obtain the bank’s corridor-specific estimate, cutoff, fee treatment and tracking reference rather than applying a universal speed claim.

AML, Customer Due Diligence and De-Risking

Correspondent banking creates a visibility challenge: the correspondent serves its respondent bank, while many underlying payments belong to that respondent’s customers. Effective controls must address the bank relationship and the activity passing through it.

Assessing the Respondent Bank

FATF Recommendation 13 calls for understanding a foreign respondent’s business, reputation and supervision, assessing its AML/CFT controls, obtaining senior-management approval for new relationships and understanding each institution’s responsibilities. It also addresses payable-through accounts and prohibits shell-bank relationships in the international standard. FATF standards are implemented through national frameworks; they are not an identical, directly binding rulebook in every country.^[8]

In the United States, covered foreign-financial-institution correspondent accounts require risk-based due diligence under the BSA rules described in the FFIEC manual, including enhanced diligence for specified foreign banks. The assessment considers the business, markets, expected activity, relationship and AML record. Ongoing monitoring and periodic review check whether actual activity fits that understanding.^[9]

Reviewing a Payment Is a Separate Task

Relationship approval does not preapprove every payment. A transaction can contain missing information, a potential sanctions match or activity that warrants further investigation. Banks may seek information about a particular underlying transaction or customer.

The FFIEC manual states that U.S. regulations impose no general requirement to conduct due diligence on every customer of a foreign financial institution. That does not remove suspicious-activity, sanctions or applicable special-account obligations. Keep the respondent’s customer due diligence separate from the correspondent’s risk-based monitoring and targeted information requests.^[9]

What De-Risking Means

FATF uses de-risking for broad termination or restriction of countries or customer classes to avoid, rather than manage, risk. Commercial profitability, compliance costs and risk appetite can contribute to withdrawals. Losing access can force a respondent to find a different route or additional intermediaries.^[10]

Risk-based supervision does not mean every foreign respondent carries the same risk. U.S. agencies have emphasized that no customer type has one uniform risk profile and that compliant banks managing the relevant risks are not discouraged from serving an entire class. This does not guarantee access, require an unmanageable relationship to continue or permit a prohibited payment.^[11]

Where CLS and Payment-versus-Payment Fit

The worked payment transfers only USD. If a bank separately trades one currency for another, it creates a two-leg FX settlement problem: it could pay the currency it sells without receiving the currency it buys. This principal settlement risk differs from uncertainty about a message’s delivery.

Payment-versus-payment (PvP) links final transfer of one currency to final transfer of the other. CLSSettlement provides PvP for eligible FX transactions in supported currencies; eligible third parties can access it through settlement members. Its current operator materials identify 18 eligible currencies, rather than universal coverage of all currencies and transfers.^[14]

PvP protects against paying away principal without the linked currency receipt. It does not guarantee that every trade will settle, eliminate replacement-cost or liquidity risk, or remove all exposure to a service provider. An eligible FX trade settled through CLS and the separate payment into a supplier’s bank account remain distinct tasks.^[13] For the broader distinction between derivative exposure and principal settlement exposure, see counterparty credit risk; currency-market instruments are covered in international financial markets.

How to Evaluate a Correspondent Payment

For a treasury or operations discussion, use a short sequence:

1. Identify the claims. Name the payer, beneficiary, account-owning banks and relevant correspondents. Identify the currency at each link.
2. Separate FX from the transfer. Determine whether conversion is needed, who performs it and how its settlement connects with the customer payment.
3. Establish the route and funding. Ask which accounts or systems are used and whether the necessary balance or credit capacity is available.
4. Confirm terms. Check charges, net receipt, cutoffs, value dates, beneficiary details and any information needed for compliance.
5. Track completion. Match instructions to confirmed account entries and beneficiary credit; investigate exceptions instead of treating “sent” as a complete reconciliation.

Common Correspondent Banking Mistakes

• Counting nostro and vostro as separate money. They describe the two banks’ records of the same deposit relationship.
• Reading debit as a universal decrease. Harbor debits a liability to reduce it; Meridian debits an asset to increase it.
• Treating a customer deposit as the bank’s asset. The deposit is what the bank owes. Its nostro or reserve balance is a separate asset.
• Assuming an international payment requires FX. Two parties can pay in the same currency, as Summit and Cedar do.
• Assuming every payment traverses Swift, Fedwire, CHIPS and CLS. Messaging, USD settlement and eligible FX settlement have different roles, and actual routes vary.
• Equating a sent instruction with available funds. Confirm the settlement and beneficiary-account events relevant to the payment.
• Calling every relationship withdrawal an AML mandate. Distinguish legal prohibitions, case-specific risk findings and commercial decisions.

Limitations of the Simplified Model

Actual operations can involve temporary accounts, fees, FX, credit, returns, rejected instructions, local restrictions and different booking times. Deposits also expose their holders to the account bank; sharing a correspondent does not eliminate that exposure. System finality addresses the identified settlement obligation, while disputes, recovery requests and customer rights require their own legal analysis.

Relationship availability and payment practices can change. Verify current bank terms, applicable rules and sanctions requirements for a real arrangement. This article does not provide a complete compliance program, legal opinion or bank-specific posting manual.

Sources and Banking-Guidance Notes

Research accessed November 6, 2026. Bank and business names and numerical balances are hypothetical. The source dates distinguish current operating materials from background reports; FATF and Basel guidance are identified separately from U.S. regulatory guidance.

1. CPMI: Correspondent banking, July 2016, section 2.1, Figure 1 and payment-message discussion. Historical message-format prevalence is not used as a current operating rule.
2. Bank of England: Money in the modern economy—an introduction, March 2014, “Different types of money”, “Who owes who?” and Figure 2. Used for balance-sheet concepts.
3. Swift: Who we are, current FAQs on messaging, funds movement and beneficiary credit.
4. ISO 20022 Registration Authority: About ISO 20022, message-development framework and structured financial data.
5. Federal Reserve Financial Services: Fedwire Funds Service PFMI Disclosure, December 5, 2025, general description, core functions and settlement finality.
6. The Clearing House: CHIPS Public Disclosure, October 2026, system operation, prefunding and Standards VIII–IX.
7. The Clearing House: CHIPS Rules and Administrative Procedures, June 4, 2026, Rules 2 and 13.
8. FATF Recommendations, as amended June 2026, Recommendation 13 and its interpretive note.
9. FFIEC BSA/AML Manual: Due Diligence Programs for Correspondent Accounts for Foreign Financial Institutions, current public chapter on 31 CFR 1010.610, risk-based controls and monitoring.
10. FATF: Guidance on Correspondent Banking Services, October 2016, paragraphs 1–3 and 18–22.
11. U.S. agencies: Joint Statement on Risk-Based Customer Relationships and CDD, July 6, 2022, SR 22-5.
12. Basel Committee: AFS10, Anti-money laundering and counter-terrorist financing, January 2026 consolidated guidance, correspondent-banking sections 10.105–10.146.
13. Basel Committee: RMA20, Foreign exchange risks, January 2026 consolidated guidance, PvP, liquidity, correspondent confirmation and legal finality.
14. CLS: CLSSettlement and third-party access, current operator descriptions of eligible FX PvP settlement.
15. CPMI: Enhancing cross-border payments—building blocks of a global roadmap, July 2020, main text and focus areas C–D on operational and data frictions.
16. AUSTRAC: Correspondent banking relationships, “Vostro accounts”. Used only for the nostro/vostro terminology; Australian legal requirements are not presented as U.S. rules.
17. European Central Bank glossary: Value date, agreed disposal date and interest-reference definition.