What is ACH

ACH (Automated Clearing House) is the network that moves money between US bank accounts. With a US account that supports ACH, you can receive and send dollars much like a local resident or business. It is the everyday rail behind salaries, bills and bank transfers, and it is usually cheap or free.

ACH was created in the early 1970s to replace paper checks with electronic transfers. Today it powers payroll, direct deposits, bill payments, tax refunds and bank-to-bank transfers. Most Americans use ACH every month without ever thinking about it, so this is not a niche fintech rail, it is the default way money moves in the US.

Tens of billions of ACH payments are processed every year, moving trillions of dollars across the network. Payroll deposits, Social Security payments and tax refunds all rely heavily on ACH. When you understand how widely it is used, it is easy to trust it as core financial infrastructure rather than something experimental.

Unlike international Wires, ACH payments do not pass through correspondent or intermediary banks. Funds move through a single standardized domestic network, which keeps costs low and makes many ACH transfers free. There is no chain of banks each taking a cut along the way.

Inside the US you will mainly see three rails: ACH for everyday payments, Wire for large or urgent transfers, and RTP (Real-Time Payments) for instant transfers around the clock. For receiving regular dollar income, ACH and RTP cover almost everything without the cost of an international Wire. Here is how they compare:

Direct deposit is simply an ACH payment sent straight into your account. Employers use it to pay salaries, and government agencies use it to distribute benefits and tax refunds. Many people do not realize that direct deposit and ACH are essentially the same infrastructure.

ACH transfers can sometimes be returned or reversed, for example in cases of fraud, duplicate payments or insufficient funds. This is different from a Wire transfer, which is generally much harder to recall once it is completed. For most people receiving income, this safety net is a quiet advantage of the ACH network.

If Pix is the default way to move money between accounts in Brazil, ACH is the closest equivalent for bank-to-bank transfers in the United States. It is not instant the way Pix is, but it plays the same role: the standard, low-cost rail that almost every payment runs on.

Many US companies can only pay through domestic payment rails such as ACH, RTP or direct deposit. Having US account details (an account number and routing number) lets you receive payments through the same infrastructure used by local businesses and employees, with no SWIFT, no intermediary banks and no 3.5% IOF on an outbound Wire.

The simple rule: ACH moves dollars inside the US, SWIFT moves money between countries. To get paid in dollars from a US source, ACH into a US account is the clean, cheap path, while SWIFT is what you fall back on when there is no US account to receive into.