Prefunding is the quiet line item in cross-border treasury. To send money reliably, a business or institution holds balances in many corridors in advance. Those balances rarely appear as a cost on any invoice, yet they are real: money parked to be safe is money not working anywhere else.

What freezing actually costs

A nostro balance is a prepayment. It exists so that a payment can be made the moment it is requested, without waiting for funds to arrive. The direct cost is the opportunity forgone on that balance — capital that could fund operations, reduce borrowing or earn a return. The indirect cost is maintenance: every additional corridor adds an account to monitor, top up, reconcile and audit. Scale the model across ten currencies, several partners and multiple legal entities, and the coordination effort grows faster than the volume it supports.

Where the money is released

A netting hub attacks the problem at the source. When approved operations enter a single order book, offsetting flows cancel internally and only the remainder leaves for external rails. Consider participants where one bank sends €10m and others receive €8.5m: only €1.5m has to move outside. The prefunded balance needed to support the same volume falls accordingly, because the network is doing the matching that standalone accounts cannot.

Fewer corridors, better visibility

Consolidation also reduces complexity. Instead of holding buffers in every jurisdiction, treasury holds what the net position requires and routes the rest. Balances remain with licensed partners — SUPA is not a bank before a banking licence and does not hold client money in its own name — so the change is structural rather than custodial. Every operation still lands in a double-entry ledger attributable to principal, agent and policy version, which makes the cost of freezing visible instead of hidden.

In short

  • A nostro balance is a prepayment with a real opportunity cost.
  • Each extra corridor adds monitoring and reconciliation overhead.
  • Netting cuts the prefunded amount needed for the same volume.
  • Visibility improves even when balances stay with licensed partners.

Work out what netting would release for your flows → /business/