How international ACH transfers work

If you do business internationally or plan to, you need to consider how you handle international financial transactions.

International ACH transfers, processed as International ACH Transactions (IATs) in the U.S., can be a cost-effective way to send and receive cross-border payments. However, processing times, fees, and reliability vary depending on the receiving country’s banking system.

In this guide, we'll look at how international ACH works, explain how to make an international ACH transfer, and compare it to other payment methods.

What is an international ACH transfer?

An international ACH transfer is an electronic payment that moves funds from a U.S. bank account to a foreign bank account using the Automated Clearing House network. These cross-border transactions must follow special International ACH Transaction rules and are typically used for paying overseas vendors or international contractors.

International ACH transfers are governed by Nacha (formerly the National Automated Clearing House Association). Nacha worked with the Office of Foreign Assets Control (OFAC) to create a specific ACH format that allows Receiving Depository Financial Institutions (RDFIs) to comply with Nacha's rules and streamline international payments.

Equivalent systems such as Canada’s Electronic Funds Transfer (EFT) and the European Union’s Single Euro Payments Area (SEPA) serve similar roles to ACH within their own regions, offering low-cost, electronic transfers. However, they are distinct systems and not directly connected to the U.S. ACH network.

International ACH transfers share some characteristics with domestic ACH payments, such as batch processing, but they require additional compliance checks and regulatory approvals, making the process more complex. This includes currency conversion, varying regional banking regulations, and international compliance standards.

Key aspects of international ACH transfers

There are a few factors that differentiate international ACH transfers from other forms of electronic payment. These include their classification, processing time, currency flexibility, and regulatory requirements.

Here are some of their key aspects:

• IAT designation: Every international ACH payment is classified under the IAT Standard Entry Class (SEC) code
• Processing time: The time required for funds to reach the recipient usually ranges from 1–5 business days, depending on the banks involved and regulatory checks made
• Currency flexibility: International ACH transactions are supported in numerous countries and multiple currencies, but many are processed in USD, requiring separate currency conversion before or after settlement, depending on bank policies
• Security and compliance: International ACH transfers adhere to strict regulatory standards, including anti-money laundering and Know Your Customer (KYC) requirements

Due to compliance requirements, international ACH transactions undergo regulatory checks to ensure security, though other payment methods, such as international wire transfers, may have additional layers of oversight.

The international ACH process: How it works

Here’s a detailed, step-by-step breakdown of how to perform an international ACH transfer:

1. Collect recipient bank details: First, gather the recipient’s details, including their name, address, bank account number, country, and SWIFT code
2. Initiate the transfer: Contact your bank to initiate the transfer. Some banks support international ACH online, while others may require a phone call or branch visit.
3. Provide authorization: You must authorize the transfer before it can proceed. Depending on your bank’s requirements, you may have to sign a form, submit written consent via email, or provide approval through the bank’s online platform.
4. Enter transaction details: After authorization, you or a bank representative will enter the transaction details, such as transfer amount and currency type, into the bank’s system
5. Currency conversion: If sending funds in a foreign currency, your bank will convert the USD amount using their current exchange rate. Some banks allow you to lock in rates or see conversion amounts before finalizing the transfer.
6. Batch processing: The Originating Depository Financial Institution (ODFI) groups your transfer with other ACH transactions in batches
7. Sending to the ACH network: The ODFI then sends the batched transactions to an ACH operator, such as the Federal Reserve or another clearinghouse. These operators then process the transactions at scheduled times.
8. Processing and validation: The ACH operator processes the transaction. Your bank handles compliance checks and will alert you if any issues arise.
9. Settlement: After validation, funds are transferred between banks
10. Completion: Once the funds are settled, the recipient’s bank credits the transferred amount to their account. This usually takes 1–5 business days, depending on bank processing times, regulatory checks, and currency conversion requirements.

This streamlined process makes international ACH transfers an efficient, cost-effective alternative to wire transfers for businesses regularly sending cross-border payments to vendors and suppliers worldwide.

International ACH transfers vs. international wire transfers

When choosing between international payment methods, you may weigh international ACH transfers against international wire transfers, each offering distinct advantages in cost, speed, and processing requirements.

International ACH transfers offer significant cost savings over wire transfers, but consider processing times and potential hidden fees when choosing the best method for your specific needs.

International ACH transactions vs. international ACH transfers

People often confuse International ACH Transactions and international ACH transfers due to their similar terminology and overlapping context.

International ACH Transactions (IATs) are Standard Entry Class (SEC) codes that help banks differentiate cross-border ACH transfers from domestic ones. It ensures cross-border payments meet compliance standards, including data requirements for OFAC screening.

An international ACH transfer uses the IAT SEC code to process cross-border payments through the U.S. ACH network, but the funds may be routed to or from international accounts via local networks or correspondent banking partners.

What are the rules and regulations for international ACH transfers?

International ACH transfers are subject to comprehensive regulatory oversight designed to ensure secure, compliant cross-border transactions. Understanding these key regulatory frameworks is essential for processing international ACH transfers successfully while avoiding compliance violations.

AML regulations

International ACH transfers are closely monitored to prevent money laundering. Make sure your transactions comply with anti-money laundering (AML) requirements, and verify the funds' source and legitimacy. Banks and payment processors must detect and report suspicious activity, such as unusually large payments or inconsistent transaction patterns.

KYC policies

To comply with KYC regulations, you must provide accurate and detailed information about yourself and the recipient. You’ll need to submit identification documents and confirm account details.

OFAC screening

All international ACH transfers involving U.S. businesses must comply with OFAC regulations. Payments must not involve sanctioned individuals, entities, or countries. Your bank will screen transactions against OFAC’s sanctions list to confirm compliance.

Nacha and IAT rules

As the governing body for the ACH Network, Nacha establishes the operating rules and standards that all ACH transactions must follow. For international ACH transfers, you must comply with specific International ACH Transaction requirements that include enhanced data fields and proper formatting to meet regulatory standards for cross-border payments.

IAT transactions require detailed beneficiary information, intermediary bank details when applicable, and purpose codes that accurately describe the transaction type. Financial institutions must ensure proper IAT coding and data completeness, as incorrect formatting or missing required fields can result in transaction rejection, delays, or compliance violations.

GDPR for European transfers

Compliance with the General Data Protection Regulation (GDPR) is mandatory when sending payments to recipients in the European Union. You must protect personal data related to the transaction and ensure it’s handled securely and processed according to GDPR standards.

Failure to comply with regulatory requirements for international ACH transfers can result in delays or more serious consequences, such as fines or restrictions on future transactions.

Also, consider implementing a reputable financial management platform with advanced features such as real-time tracking, automated compliance checks, and multi-currency support to simplify the complexities of managing international payments.

Manage your domestic and international payments with Ramp

ACH transfers are a reliable, secure, and affordable way to pay your invoices when doing business with international contractors or suppliers. But managing payments properly is what really matters. That’s where Ramp can help.

With Ramp AP software, you get:

• Unified payment management: Manage all domestic and international vendor payments, whether by check, card, ACH, or wire, on one platform with comprehensive visibility and control
• Seamless integration: Integrate Ramp with your existing accounting software or use it as a standalone tool for all your accounts payable needs
• Document uploading: Use OCR technology to scan documentation easily instead of filling out new vendor information, invoices, and POs manually
• Error alerts: Receive notifications for errors such as missing information or duplicate invoices

Complete visibility into where your invoices are in the payment cycle means easier cash flow management. Get real visibility while saving time and money with Ramp Bill Pay.

This post includes general information about ACH payments. For help with ACH functionality specific to Ramp, visit Ramp Support for more details.