From Gross Payments to Net Positions

Every payment has a gross value, which is the full amount instructed by the payer. If Bank A sends one hundred payments worth ten million in total to Bank B, and Bank B sends eighty payments worth eight million to Bank A, the gross flows are ten million in one direction and eight million in the other. The net position is the difference between these two gross flows. In this example Bank A owes Bank B a net amount of two million, even though the total value of payments exchanged was eighteen million. Netting reduces the amount that actually needs to move at settlement, which is the core benefit of the whole process. This reduction matters because settlement uses central bank money, which is scarce and expensive to hold in large amounts. If banks had to settle every gross payment separately, they would need far more liquidity sitting in their central bank accounts. By netting first, they only need enough liquidity to cover the net difference. The same logic applies at scale. In a system with twenty banks exchanging thousands of payments, the total gross value might run into billions, while the total net settlement might be only a fraction of that amount. Netting therefore makes the payment system far more efficient. It is important to understand that netting does not cancel any individual payment. Each customer payment still reaches its intended recipient in full, and each recipient sees the full amount credited to their account. Netting only changes how banks settle with each other behind the scenes. The customer experience is unchanged, but the interbank settlement is much lighter. This separation between the customer leg and the interbank leg is a key concept in payments, and it appears again in card clearing, in cross border settlement and in securities settlement. Work the bilateral example in full. Bank A sends one hundred payments worth ten million in total to Bank B, and Bank B sends eighty payments worth eight million to Bank A. The gross flows are ten million in one direction and eight million in the other, a total of eighteen million moving between the two banks. The net position is the difference, which is two million owed by Bank A to Bank B. At settlement, a single payment of two million moves from Bank A to Bank B, and both banks update their customer accounts in full. The customers see ten million and eight million of payments, but the banks only move two million between themselves. Compare that with gross settlement, where every payment settles individually in central bank money. In a real time gross settlement system, each of the one hundred and eighty payments would settle separately, and Bank A would need enough central bank funds to cover its ten million of outgoing payments as they are sent, even though eight million is coming back. That is faster and final for each payment, which is why high value payments use it, but it needs far more liquidity. Netting trades speed for efficiency. Payments wait for the clearing cycle, and in return the banks need only enough liquidity to cover the net difference. The liquidity saving is the reason netting exists. Banks hold balances at the central bank to cover their net settlement obligations, plus a buffer for unexpected changes. Intraday credit from the central bank can cover a temporary shortfall, but it has a cost and a limit. By netting first, a bank needs a much smaller balance, and the cost of holding that balance falls. At the scale of a national payment system, where thousands of payments flow between dozens of banks, the gross value can run into billions while the net settlement is only a fraction of that. That saving is what makes high volume retail payments affordable to run. Netting does not remove risk, and an analyst must be clear about what it does not do. It does not change any customer payment, and it does not cancel any obligation. It does not remove credit risk, because a bank can still fail between clearing and settlement, and if it does, its payments may be unwound and the net positions recalculated. It does not remove the need for controls, because a single error in the gross files flows straight into the net calculation. Netting only changes how banks settle with each other behind the scenes. The customer experience is unchanged, but the interbank settlement is much lighter, and the risks move to the settlement stage, where they must be managed explicitly.