Nostro and vostro accounts

Nostro and vostro come from the Italian for ours and yours, and they describe one account from two points of view. A nostro account is our money held at your bank. A vostro account is your money held at our bank. It is the same balance either way; the word you use depends only on whose ledger you are looking at.

The European Central Bank puts the distinction in terms of who holds the claim. It is a nostro when the reporting bank has a claim on the other institution, meaning it is the reporting bank’s money on deposit. It is a vostro when the other institution has the claim, meaning it is the other bank’s money on deposit. The same account can even change designation as balances move.

How they make cross-border payments work

Nostro and vostro accounts are the settlement mechanism of correspondent banking. The CPMI describes the model plainly: correspondent banking requires respondent banks to open accounts in the correspondent bank’s books, and payments settle by crediting and debiting those accounts as messages are exchanged. When a bank needs to pay in a currency it does not issue, it holds a nostro balance at a correspondent in that currency, and the payment settles by moving money between these accounts.

You will occasionally see a third term, loro, meaning theirs, used when a bank refers to an account held for one bank on behalf of another. The vantage point is the only thing that changes; the account is the same.

Where the cost hides

The expense of this model lives on the nostro side. To be ready to pay, a bank has to fund a balance in each currency, at each correspondent, in advance. That money cannot be doing anything else while it waits. It is idle by design. Multiply it across every currency and every correspondent relationship, and a bank ends up holding capital pre-positioned all over the network purely so that payments can settle, a direct expression of liquidity fragmentation.

On top of the idle balances sits the operational load. Banks reconcile each nostro account against the correspondent’s statement, every day, to catch discrepancies. This is the routine, unglamorous cost of running money across borders on separate ledgers, and it is exactly what programmable settlement aims to remove by letting value settle directly rather than through pre-funded accounts.