Instant payments are fund transfers that settle in seconds — 24/7/365, with irrevocable finality — as opposed to traditional ACH which settles in 1-2 business days. In the U.S., the two instant payment networks are The Clearing House (TCH) Real-Time Payments (RTP) and the Federal Reserve's FedNow Service, both launched for U.S. financial institutions.
Traditional ACH and wire transfers operate on delayed settlement cycles that leave the recipient waiting hours to days for available funds. Instant payment rails eliminate this gap: money moves and is irrevocably final within 10-15 seconds, available 24/7 including weekends and holidays. ## U.S. Instant Payment Networks Two competing networks operate in the U.S.: 1. TCH Real-Time Payments (RTP): Launched 2017 by The Clearing House (owned by large U.S. banks). Reaches ~65%+ of U.S. demand deposit accounts. $1M per transaction limit. 2. FedNow: Launched July 2023 by the Federal Reserve. Designed to extend reach to smaller community banks and credit unions. Both networks can interoperate via financial institution connectivity. ## Business Applications Instant payments are transforming business cash flow: insurance claim payments, payroll disbursements, invoice settlement, and loan disbursements all benefit from immediate finality. Gig economy platforms (Uber, Lyft, DoorDash) now offer instant driver payouts via RTP. B2B payments — traditionally settled via check or 2-3 day ACH — are migrating to instant rails for working capital efficiency. ## Irrevocability Risk Unlike ACH, instant payments cannot be reversed once sent. There is no equivalent of an ACH return or recall once the payment reaches the beneficiary. This irrevocability creates fraud exposure — a misdirected instant payment is very difficult to recover. The CFPB's examination guidelines address instant payment error resolution rights, which differ from ACH error-correction rights under Regulation E.
Same-day ACH settles within hours but only during banking business hours on business days (three processing windows per day). Instant payments settle in seconds, 24/7/365 including weekends and holidays. Same-day ACH can be reversed through the return process; instant payments are irrevocable once settled. Same-day ACH has lower limits ($1M per transaction since March 2022); RTP has a $1M limit and FedNow's limit varies by institution.
FedNow participation is voluntary for U.S. financial institutions. As of mid-2025, over 900 financial institutions have joined FedNow — mostly community banks and credit unions that were underserved by TCH RTP. Check your bank's website or contact your business banking relationship manager. Participation is growing rapidly as the Fed continues outreach to smaller institutions.
The primary risk is irrevocability — a wrong account number or fraud-induced payment cannot be recalled the way an ACH can. Businesses should implement additional controls before initiating instant payments: dual-authorization for large transfers, callback verification for new payees, and clear internal approval workflows. Business email compromise (BEC) scams specifically target instant payment irrevocability to steal funds that cannot be recovered.