The Economics of Instant Payments

Instant payment schemes have spread across the world, from the UK's Faster Payments to the EU's SEPA Instant, the US FedNow and RTP, India's UPI, and Brazil's Pix. To a consumer they often feel free and effortless. But real money moves in real time, and running that infrastructure has genuine costs. Understanding the economics of instant payments explains a lot about why schemes are designed the way they are.

The cost that never appears on the receipt

The most visible cost is the scheme fee: a small per-transaction charge that the payment operator levies on participating banks to run the central switch. These fees are typically tiny — fractions of a penny to a few pence per transaction — because instant schemes are designed as low-margin utilities, not profit centres. Banks may or may not pass these on. In many markets, person-to-person instant payments are free to the end user, funded by the bank as a cost of doing business and a defence against losing customers.

But the scheme fee is far from the biggest cost. The more interesting economics sit in liquidity and risk.

Liquidity and pre-funding

Instant payments run 24/7/365, but the wholesale settlement systems that move central bank money between banks traditionally run only during business hours. That mismatch creates a liquidity problem. If customers can send money at 3am on a Sunday, the receiving banks are crediting accounts against obligations that will not settle until later. To manage this, schemes require participants to pre-fund or post collateral.

In the US, for example, FedNow and RTP require banks to maintain prefunded balances to cover the payments they send when the wholesale system is closed. Pre-funded money is money that cannot be lent out or invested — it sits idle as a liquidity buffer. That opportunity cost is a real, ongoing expense of participating in an instant scheme, and it scales with volume and with how long the funding must sit trapped.

The 24/7 operational burden

Batch systems can close overnight for maintenance, reconciliation, and recovery. An instant scheme cannot. It must be available around the clock, which means redundant infrastructure, always-on support, and no comfortable maintenance windows. Banks connecting to these schemes must likewise keep their core systems and fraud engines available 24/7, since a payment can arrive at any moment and must be accepted or rejected within seconds. Always-on availability is expensive to build and to staff.

Fraud is a settlement-speed problem

Speed and finality are features for legitimate users and gifts for fraudsters. Once an instant payment settles, it is generally irrevocable — there is no card-style chargeback mechanism. That shifts the economics of fraud onto real-time prevention. Schemes and banks invest heavily in behavioural analytics, device signals, name-checking overlays, and transaction limits, because the alternative is unrecoverable losses. In markets that have seen surges in authorised push payment fraud, regulators have pushed liability onto banks, turning fraud into a direct cost line that funds prevention investment.

Who pays, in the end

• Banks absorb scheme fees, liquidity and pre-funding costs, 24/7 operations, and often fraud losses.
• Merchants and billers may pay for value-added services like Request to Pay, reconciliation data, or guaranteed payments, and often prefer instant rails precisely because they are cheaper than cards.
• Consumers usually pay nothing directly for basic transfers, but the costs are recovered elsewhere in banking relationships.

Why cards still cost more

It is worth contrasting with cards. Card payments carry interchange fees, typically a percentage of the transaction, that fund rewards, fraud guarantees, and the network. Instant account-to-account payments have no comparable percentage fee, which is why merchants and governments often champion them: for a large purchase, a flat sub-penny instant payment is dramatically cheaper than percentage-based interchange. That cost gap is a major reason instant rails keep gaining ground.

Key takeaways

• Scheme fees for instant payments are deliberately tiny — instant rails are run as low-margin utilities.
• The larger costs are liquidity and pre-funding, because 24/7 payments settle against wholesale systems that traditionally close overnight.
• Running an always-on scheme removes maintenance windows and forces redundant, staffed infrastructure.
• Instant finality makes fraud an unrecoverable, real-time-prevention cost, increasingly borne by banks under regulatory pressure.
• Instant account-to-account payments avoid percentage-based card interchange, which is why merchants and governments favour them.