What Is Wire Transfer?

Wire transfers are electronic fund transfers that move money directly between bank accounts through a network of banks and transfer services. Unlike ACH or SEPA transfers, wire transfers are processed individually and in real-time, making them faster but more expensive. They remain the standard for high-value B2B payments, international trade, and real estate transactions.

## How Wire Transfers Work

A wire transfer begins when the sender instructs their bank to transfer funds to a recipient's account at another bank. For domestic wire transfers in the US, this typically goes through the Fedwire system operated by the Federal Reserve. International wire transfers use the SWIFT (Society for Worldwide Interbank Financial Telecommunication) network, which connects over 11,000 financial institutions in 200+ countries.

The sender provides the recipient's bank details: account number, bank name, and routing number (domestic) or SWIFT/BIC code (international). For international transfers, correspondent banks may be involved as intermediaries, each potentially adding fees and processing time.

## Domestic vs International Wire Transfers

Domestic wire transfers in the US are typically completed within hours on the same business day. They cost $15-30 for outgoing transfers. International wire transfers take 1-5 business days depending on the corridor, time zones, and number of intermediary banks involved. International outgoing fees range from $25-50, with additional intermediary bank fees of $15-30 that may be deducted from the transfer amount.

## Wire Transfer vs ACH vs SEPA

The key differences are speed, cost, and use case. Wire transfers are real-time but expensive — best for large, one-off payments. ACH transfers are batch-processed and cheap ($0.20-$1.50) — ideal for recurring payments and payroll. SEPA transfers are the European equivalent of ACH, processing within one business day for minimal fees. For businesses making regular international payments, services like Wise and Airwallex offer significantly lower fees than traditional bank wire transfers.

## Foreign Exchange Considerations

International wire transfers involve currency conversion, where banks typically apply a markup of 1-4% on the mid-market exchange rate. This hidden FX fee often exceeds the stated wire transfer fee itself. Fintech alternatives like Wise offer transfers at the mid-market rate with transparent, lower fees, saving businesses 3-8x compared to traditional bank wire transfers.

## Security and Finality

Wire transfers are irrevocable once processed — they cannot be reversed or charged back like credit card payments. This finality makes them secure for sellers but risky for buyers in fraud scenarios. Banks verify sender identity and may flag suspicious transfers under anti-money laundering (AML) regulations. For large international transfers, banks may require additional documentation about the purpose of the transfer.

## When to Use Wire Transfers

Wire transfers remain essential for real estate closings, large B2B invoice payments, international trade settlements, and emergency fund transfers where speed is critical. However, for routine business payments, cheaper alternatives like ACH, SEPA, or fintech platforms are increasingly preferred.