SWIFT, ACH and Fedwire explained
Three rails, three jobs. How each one moves money, what it costs, and which to use for each payment.
- ACH is the low-cost US batch rail: free or nearly free, next business day.
- Fedwire is the US real-time rail: minutes, irreversible, priced for large or urgent payments.
- SWIFT is a messaging network, not a payment system; the money moves through correspondent banks, which is where deductions happen.
- SEPA and Faster Payments do the same job for EUR and GBP.
- USDC and USDT settle in minutes, seven days a week, with no correspondent chain.
Three rails, three jobs
ACH, Fedwire and SWIFT are the three ways a USD payment moves between banks. ACH is the United States' low-cost batch system, run by the Federal Reserve and The Clearing House under Nacha's rules. Fedwire is the Federal Reserve's real-time system for large and urgent payments. SWIFT is not a payment system at all: it is the messaging network banks use to instruct each other across borders, with the money moving through correspondent accounts.
| ACH | Fedwire | SWIFT | |
|---|---|---|---|
| Runs where | United States | United States | Worldwide, between banks |
| Operated by | Federal Reserve and The Clearing House, under Nacha rules | Federal Reserve | Swift (messaging); banks move the money |
| Speed | Next business day; same day before cut-off | Minutes, same business day | 1 to 3 business days |
| Typical cost to send | Free to a few dollars | 15 to 30 USD at most banks | 25 to 50 USD, plus correspondent deductions |
| Reversible | Yes, within rules | No | No; recalls are requests, not reversals |
| Best for | Routine collections and payments inside the US | Large or urgent USD payments inside the US | Paying any bank account outside the US |
ACH
ACH payments are collected into batches and settled several times a business day. A credit submitted before the bank's cut-off usually arrives the next business day; same-day ACH settles the same day for payments submitted early enough. There is no amount limit for most business credits in practice, though same-day ACH has a per-payment cap set by Nacha. ACH is the rail US buyers use to pay vendors, and the rail an exporter should steer them towards: it costs the buyer nothing and arrives with the full amount.
Fedwire
Fedwire moves money between banks' accounts at the Federal Reserve in real time, one payment at a time, and cannot be reversed once sent. Banks charge more for it than for ACH, so it suits payments that are large, urgent or both: a property deposit, a time-critical supplier balance, a payment that must arrive before a cut-off. It uses the same routing number and account number as ACH.
SWIFT
A SWIFT payment is a chain of messages. Your bank instructs a correspondent bank, which may instruct another, until the recipient's bank is reached. Each bank in the chain may deduct a fee, which is why a supplier sometimes receives less than was sent. The sender can choose who pays the charges: OUR (sender pays all), SHA (shared) or BEN (recipient pays). Arrival takes one to three business days depending on the chain and the currency. Helm sends SWIFT payments with the arrival date shown before you approve and each stage time-stamped to arrival; see International Payments.
The European and British equivalents
Outside the US, the same pattern holds. SEPA credit transfers move EUR between banks in the SEPA area, usually same or next day, with SEPA Instant settling in seconds. Faster Payments moves GBP inside the United Kingdom in minutes. A business with a EUR IBAN and a GBP sort code and account number can be paid on both without any international wire.
Digital dollars as a fourth rail
USDC and USDT move on public networks (Solana, Ethereum, Tron) in minutes, seven days a week, with no correspondent chain and no deductions in transit. For suppliers and buyers who hold a wallet, they are the fastest way to settle at a weekend or across a corridor where SWIFT is slow. Helm supports both and converts them to USD inside the account; see Digital Dollars.
Choosing the rail
Inside the United States, use ACH unless the payment is urgent, then Fedwire. Into Europe, use SEPA; into the United Kingdom, Faster Payments. Everywhere else, SWIFT to a bank account or USDT and USDC to a wallet. The guides to receiving USD from overseas buyers and paying suppliers in China apply this to the two most common cases.
Open a Helm account
USD, EUR and GBP accounts in your company's name, international payments on bank rails and in digital dollars, and trade finance. A named account manager from the first call.
Open accountQuestions
Is SWIFT a payment system?
No. SWIFT is the messaging network banks use to instruct each other. The money moves through correspondent bank accounts, which is why fees can be deducted along the way.
Which is faster, ACH or Fedwire?
Fedwire. It settles in minutes during Federal Reserve hours. ACH usually settles next business day, or same day before the cut-off.
Why did my supplier receive less than I sent by SWIFT?
A correspondent bank in the chain deducted a fee. Sending with charges set to OUR means the sender pays all fees and the recipient receives the full amount.
Can I use the same account number for ACH and Fedwire?
Yes. Both use the routing number and account number.
Are digital dollar payments reversible?
No. Like Fedwire and SWIFT, a USDC or USDT payment is final once confirmed. Helm confirms the recipient before the first payment and screens every payment before it is sent.
References
- Nacha: What is ACH?
- Nacha: Same Day ACH
- Federal Reserve: Fedwire Funds Service
- Swift: About Swift
- European Payments Council: SEPA Credit Transfer
- Pay.UK: Faster Payments
This guide is general information for businesses, not financial, legal or tax advice. Fees and timings quoted for other providers are taken from their published pages on the review date and may change.