Choosing a rail: SWIFT, ACH, Fedwire, RTP, or stablecoins
Choosing a payment rail comes down to three questions: does the payment cross a border, how fast does it need to settle, and can it still be recalled after it is sent. SWIFT, ACH, Fedwire, RTP, and stablecoin transfers answer those questions differently — and a single Infinite account can send on any of them.
Five rails, one account
- SWIFT — a messaging network connecting more than 11,000 banks worldwide; payments settle hop by hop over correspondent accounts.
- ACH — a US domestic batch rail that settles same-day or next-day and can still be returned days after it settles.
- Fedwire — a US domestic real-time gross settlement rail; final and irrevocable the moment it settles, during Fedwire's operating hours.
- RTP — a US domestic instant-payment rail, credit-push only, available 24/7/365.
- Stablecoin transfer — value moves directly between wallets on a public blockchain, final in minutes, 24/7/365, with no bank or border in the path.
The three questions that decide the rail
Does the payment cross a border?
ACH, Fedwire, and RTP move dollars bank-to-bank inside the United States — none of the three is built to reach a beneficiary bank in another country. SWIFT and stablecoin transfers are the two rails built for cross-border reach: SWIFT through its correspondent network, stablecoins through a wallet the recipient can hold or convert anywhere.
How fast does it need to settle?
Stablecoin transfers and RTP both settle in minutes, any hour of any day; Fedwire settles immediately but only during its operating hours; ACH runs in scheduled windows on banking days; SWIFT settles hop by hop, typically same day to two business days once released. The full timing and finality comparison across rails is in What is stablecoin settlement?.
Can it still be recalled once sent?
ACH debits can be returned days after they settle, which is the one rail here where “settled” is not the end of the story. Fedwire, RTP, and stablecoin transfers are final and irrevocable the moment they settle; SWIFT settlement finality depends on the correspondent chain a payment travels through.
A simple way to decide
| Situation | Rail that fits | Why |
|---|---|---|
| Domestic vendor payment, no same-day urgency | ACH | Lowest-friction domestic rail when a scheduled settlement window is acceptable. |
| Domestic, same day, must be final | Fedwire or RTP | Both settle same day with no return risk once settled; RTP also runs outside Fedwire's operating hours. |
| Cross-border to a beneficiary bank account | SWIFT | The only rail here reaching a bank account in another country through the correspondent network. |
| Cross-border, any hour, recipient can hold or convert a stablecoin | Stablecoin transfer | Settles in minutes with no correspondent chain, no cutoff window, and no border in the path. |
You don't have to choose in advance
All five rails are capabilities of the same Infinite account, not separate integrations. Transfer Routes reads destination, urgency, and cost and selects the rail per payment — the corridor decides, not a separate build for every rail you want to support.
Keep reading: What is stablecoin settlement?, Stablecoins vs SWIFT for cross-border payments
Frequently asked questions
Can one Infinite account send on all five rails?
Yes. SWIFT, ACH, Fedwire, RTP, and stablecoin transfers all send from the same account and the same API, and Transfer Routes can select the rail per payment instead of a team picking it manually for every transfer.
Which rail should I use for a domestic payment on a tight deadline?
Fedwire or RTP. Both are US domestic rails that settle the same day with no return risk once settled — Fedwire during its defined operating hours, RTP 24/7/365. ACH is cheaper in friction but settles in scheduled windows and can still be returned after settlement.
Do stablecoin transfers replace SWIFT wires?
Not always. When the beneficiary needs fiat in a bank account and has no way to receive or convert a stablecoin, SWIFT's reach across more than 11,000 institutions is still the answer. Stablecoins fit when the recipient can hold or convert the asset and the payment needs to settle in minutes, any hour.