Instant payments are bank-to-bank transfers that clear and settle in seconds, 24/7/365, including weekends and holidays. The US has two such rails: FedNow, operated by the Federal Reserve, and RTP, operated by The Clearing House. Unlike ACH, which moves in scheduled batches, here the message and the money settle together and the payment is final, so there is no card-style chargeback. This guide uses a business-to-business payment as the example.
The flow at a glance
Who’s involved
- Sender
- Business or person initiating the payment
- Sender's bank
- Holds the sender's account and submits the payment to the rail
- Instant rail
- FedNow (at the Federal Reserve) or RTP (at The Clearing House)
- Receiver's bank
- Holds the receiver's account and credits the funds
- Receiver
- Business or person being paid
How it moves, step by step
- 1messageSender
The sender instructs their bank to send an instant payment, providing the receiver's account details and amount.
- 2messageSender's bank
The sender's bank checks the sender has funds, then submits a payment message to the rail (FedNow or RTP).
- 3messageInstant rail
The rail forwards the message to the receiver's bank and asks it to confirm it can accept the payment.
- 4messageReceiver's bank
The receiver's bank validates the account and responds to the rail, accepting (or rejecting) the payment, typically within seconds.
- 5moneyInstant rail
On acceptance, interbank settlement happens immediately: the rail adjusts the two banks' settlement positions so value moves between them then and there, not in a later batch.
- 6moneyReceiver's bank
The receiver's bank credits the receiver's account with good, final funds. The receiver can use the money right away.
- 7messageSender's bank
A confirmation flows back through the rail to the sender's bank and the sender. The payment is now final and irrevocable.
- 8exceptionSender
If something is wrong, there is no chargeback. The sender can only send a request asking the receiver to return the funds; the receiver must agree to send a new payment back.
When it’s final
Seconds, end to end, 24/7/365 including weekends and holidays. Settlement is immediate and final at the moment the receiver's bank accepts, with no batch window and no later settlement step.
Common misconceptions
Myth: FedNow and RTP are basically faster ACH.
Reality: ACH moves in scheduled batches and settles later; instant rails clear and settle a single payment in seconds, continuously. They are different rails with different rules, not a speed setting on ACH.
Myth: If an instant payment goes wrong, I can reverse it like a card charge.
Reality: These payments are final and irrevocable. There is no chargeback. The most you can do is send a request for return, and the receiver has to voluntarily send the money back.
See it in the studio
Terms in this guide
Sources
- FedNow Service ↗ · Federal Reserve / FRBservices (operator). Operator details on instant settlement, availability, and finality for FedNow.
- RTP network ↗ · The Clearing House (operator). Operator details on real-time clearing and settlement and request-for-return messaging.
- Payment system policy and instant payments ↗ · Federal Reserve. Background on the role of the central bank in interbank settlement.
Educational, plain-English explainers. Not legal, compliance, tax, or financial advice. These cover fundamentals, not current fees, limits, or rates (which change). Rails and parties vary by program and country, so verify specifics against primary sources. Last reviewed June 2026.