For any transfer above a few hundred dollars, the Scholar should know which rail to use. Wires are irreversible and settle same-day. ACH is reversible for a short window and settles in one to three business days. RTP and FedNow are irreversible and settle in seconds but have low limits. The rail is a decision, not an afterthought.
- 01Distinguish the four major domestic transfer rails on speed, reversibility, and limit.
- 02Choose the right rail for a specific transfer.
- 03Explain why wires are the standard for real-estate closings.
The rails, tabulated
Wire: same-day, irreversible, high limits, $15–35 fee. ACH: 1–3 days, reversible for roughly 60 days for consumer errors, free or low-cost, per-transaction limits at most banks. RTP and FedNow: seconds, irreversible, typically $100,000 or lower, often free.
Choosing the rail
Large one-time transfer to a known counterparty with a firm deadline: wire. Recurring transfer or transfer to yourself: ACH. Real-time payment to a person you trust: RTP or FedNow. Real-estate closings are wire because the counterparty needs same-day confirmed funds and the parties are willing to trade reversibility for finality.
The fraud angle
Wires are the primary vector for high-value fraud precisely because they are irreversible. Every wire should be preceded by a voice call to the counterparty on a known number to confirm the account details. The most sophisticated fraud you will see is a spoofed wire instruction.
- Speed and reversibility are on opposite sides of a tradeoff.
- Voice-confirm every high-value wire on a known number.
- ACH is the workhorse. Wires are the exception.