For most of the last two decades, an institution's reach has been built one negotiation at a time. Each new country meant a new correspondent, a new account, a new set of documents and a new relationship to maintain. Between 2011 and 2019 the number of active correspondent banks worldwide fell by roughly 22% while payment volumes kept climbing. Fewer partners carried more traffic, and each remaining relationship became harder to replace. The question is no longer whether bilateral reach is expensive, but whether it is the right shape at all.

The arithmetic of bilateral reach

Serving twenty markets bilaterally is not twenty times one effort. It is twenty separate account structures, twenty due-diligence files, twenty legal reviews and twenty monitoring routines. These costs are largely fixed. They do not shrink when a corridor is thin — which is precisely why low-volume corridors are the first to be abandoned.

What a hub changes

A hub inverts the direction of the relationship. Instead of every institution opening accounts everywhere, the hub holds correspondent accounts for institutions. An institution connects once and reaches every other participant through a single governed relationship. Reach becomes a property of the network rather than a private collection of arrangements.

The same inversion applies to operations. Approved operations enter a single order book, where offsetting flows cancel internally and only the remainder is routed onward. If bank A sends €10m and participants B and C receive €8.5m, only €1.5m has to leave the hub.

What it does not change

Participation is not absorption. Clients remain clients of their own bank or fintech; the operator does not compete for those relationships. SUPA is not yet a bank, and before a banking licence it does not hold client money in its own name — balances sit with licensed partners. Each institution keeps its own legal duties and its own supervisor.

The value case, stated plainly

  • One integration, not dozens of private ones.
  • One direction of accounts, held for institutions rather than by them.
  • One order book, where netting reduces what actually crosses borders.
  • One validation function, so compliance is performed once per operation rather than repeated along every chain.

For a bank or fintech, the case rests on breadth without entanglement: more corridors, fewer bilateral obligations, and no loss of the client relationship.

In short

  • Bilateral reach is fixed-cost work that scales badly as corridors multiply.
  • A hub reverses the model, holding accounts for institutions instead of by them.
  • Netting means only the remainder leaves the hub.
  • Clients stay clients of their own institution.
  • The operator is not a bank; balances sit with licensed partners.

See how participation is structured for banks and fintechs at /institutions/.