The Clearing House RTP: America's Other Instant Rail
When people discuss instant payments in the United States, FedNow tends to get the headlines because it is run by the Federal Reserve. But it was not first. The Clearing House, a banking association owned by a group of large US banks, launched the RTP network in 2017, several years before FedNow went live. RTP was the country's first new core payments infrastructure in decades, and it remains a major instant rail. For builders and operators, understanding RTP is essential, because in practice you are often choosing between, or supporting both of, the two networks.
Who runs RTP and why that matters
RTP is operated by The Clearing House (TCH), a private-sector organization owned by many of the largest commercial banks in the US. This ownership structure is the defining difference from FedNow. Where FedNow is a public utility run by the central bank, RTP is a bank-owned network. That distinction shapes governance, pricing, and how banks perceive it, but the day-to-day payment experience is broadly similar: instant, final, account-to-account transfers.
One important design choice follows from private operation. RTP settles through a joint prefunded account at the Federal Reserve. Participating banks contribute funds to this pooled account, and RTP debits and credits balances within it in real time. Because the account is prefunded, settlement is final and there is no interbank credit risk during the transfer, even though TCH itself is not a central bank.
How RTP payments work
RTP is a credit-push system, like FedNow. The payer's bank sends funds outward; there is no mechanism to pull money from an account without authorization. Payments are irrevocable once sent, which means final settlement in seconds but no built-in chargeback. A payment flows roughly as follows:
- The sender initiates a payment through their bank.
- The sending bank submits an ISO 20022 message to RTP.
- RTP adjusts the banks' positions in the prefunded settlement account and passes the message to the receiving bank.
- The receiving bank confirms and makes funds available to the recipient within seconds, then acknowledges back through the network.
RTP was built on ISO 20022 from the start, giving it structured, data-rich messaging. Beyond simple credit transfers, RTP supports a set of non-payment messages that make it more of a conversation than a one-way transfer. Request for Payment lets a biller ask a customer to pay, Request for Information and Remittance Advice support reconciliation, and acknowledgement messages confirm delivery. These messaging capabilities are one of RTP's most useful features for building bill-pay and B2B products.
RTP versus FedNow
The two networks are more alike than different in their core function. Both deliver instant, final, 24/7, credit-push payments over ISO 20022. The meaningful differences are structural.
| Dimension | RTP | FedNow |
|---|---|---|
| Operator | The Clearing House (bank-owned) | Federal Reserve |
| Launched | 2017 | 2023 |
| Settlement | Joint prefunded account | Direct to Fed master accounts |
| Reach | Concentrated among larger banks initially | Broad Fed-connected reach targeted |
| Messaging | ISO 20022, rich request messages | ISO 20022 |
Because RTP grew out of the large-bank community, its early reach skewed toward bigger institutions. FedNow, by contrast, can reach the thousands of banks and credit unions that already hold accounts at the Fed, which is attractive for extending instant payments deeper into community banking. In practice the two networks coexist, and many observers expect them to remain complementary rather than one displacing the other.
The interoperability question
A payment only completes if the sending and receiving banks share a rail. Today, RTP and FedNow do not directly interoperate: a payment sent over RTP settles over RTP, and likewise for FedNow. This means a bank wanting to maximize its ability to reach counterparties may connect to both. For fintechs and platforms, that fragmentation is a real operational consideration. You may need routing logic that decides which network to use for a given destination, and fallback handling when a recipient is reachable on only one.
The practical constraint on instant payments in the US is rarely the technology. It is reachability: whether the counterparty's bank is connected to the same rail, and whether it has enabled receiving.
Handling multiple rails, plus legacy ACH and wires, is exactly the kind of orchestration problem that infrastructure platforms like KibiPay aim to abstract, so product teams can focus on the payment experience rather than the network plumbing.
What to build on RTP
RTP shines where instant, data-rich, final payments add value. Business-to-business payments benefit from the remittance and request messaging, which supports cleaner reconciliation. Bill pay can be modernized with Request for Payment, letting billers prompt customers who then approve in their own banking app. Payouts, from insurance to gig-work earnings, land instantly. As with any instant rail, the design constraint is irrevocability: strong validation and fraud controls must sit in front of the payment, because once it settles, it is done.
Takeaway
RTP is the privately operated, bank-owned instant payment network that gave the US its first taste of real-time settlement, years ahead of FedNow. It offers instant, final, ISO 20022-based credit-push payments with a strong set of request and remittance messages. Alongside FedNow, it forms one half of the US instant-payments landscape, and for builders the key decisions are about reachability, routing, and the risk controls that instant finality demands.