ACH explained for businesses outside the United States

An American customer asks for your routing number and account number so they can pay you by ACH. You do not have either, because you are in Cairo and your bank issues IBANs. Your customer is confused, because to them ACH is how everyone gets paid.

Almost everything written about ACH is written for American businesses. This is written for the company on the other end, because being payable this way is worth more to a non-US exporter than to anyone else.

Key takeaways

Question	Short answer
What is ACH?	The domestic batch payment network of the United States, used for payroll, supplier payments and direct debits in US dollars.
Can it reach my account abroad?	No. ACH settles between US financial institutions. The beneficiary has to be a US account.
So how does my US customer pay me?	By international wire over SWIFT, or by ACH into US account details held in your name through a provider.
How fast is it?	Standard ACH settles in one to two business days. Same Day ACH settles the same business day, in three daily windows.
Is it cheap?	It is the cheapest way to move US dollars domestically. That saving belongs to the US leg only.
Why should a non-US seller care?	Because it removes you from your American customer's exceptions pile and puts you in their routine payment run.
Is anything deducted in transit?	No. On the US leg the amount sent is the amount credited.
What is the catch?	ACH payments can be returned after settlement. A wire generally cannot.

What ACH is

ACH stands for Automated Clearing House. It is the batch electronic payment network of the United States, governed by the Nacha Operating Rules and run by two operators: FedACH, operated by the Federal Reserve, and the Electronic Payments Network, operated by The Clearing House.

It is large. In the second quarter of 2026 the ACH Network carried 9.3 billion payments worth 25.9 trillion US dollars, up 6.2% in volume and 11.1% in value year on year. Same Day ACH carried 435.7 million of those payments, worth 1.3 trillion dollars, up 29.5% in volume year on year (Nacha, checked September 2026).

Two things define it, and both matter to a non-US business.

It is domestic. ACH clears and settles between financial institutions in the United States. There is no branch of it that reaches an account in Egypt, Morocco, the United Arab Emirates or anywhere else. When an American company says "we will ACH you", they mean they will pay a US account.

It is batched. Payments are collected into files and processed in scheduled windows rather than individually in real time. That is why it is cheap, and why it is not instant.

What being ACH-payable does for a seller outside the United States

The figures above are the argument. 9.3 billion payments in a quarter is not a payment option in the United States, it is the default, and business-to-business volume grew nearly 10% year on year in the same period (Nacha, checked September 2026). When an American company sets up a new supplier, ACH is the path of least resistance and everything else is an exception.

Being the exception has costs that never appear on an invoice.

You stop being a special case in their accounts payable run. A domestic ACH credit is processed in a batch with every other supplier. An international wire is a separate form, a separate approval, often a separate person, and sometimes a compliance question about why this supplier is different. Suppliers who are awkward to pay get paid last.

Their cost objection disappears. A wire costs your customer a fee per payment. A domestic ACH credit costs them a fraction of that. On a supplier they pay monthly, that difference is visible in their own reporting, and it is a live reason for a procurement team to prefer a competitor who takes ACH.

Nothing is deducted from the principal. On the US leg there are no correspondent banks taking a cut in transit, so the amount your customer sends is the amount credited. Compare that with the hop-by-hop deductions set out in the SWIFT article, where the shortfall usually arrives without explanation and always arrives after the invoice.

The arrival date is predictable. One to two business days for standard, or the same US business day for Same Day ACH. There is no compliance hold at an intermediary you have never heard of, because there is no intermediary.

Reconciliation data travels with the payment. The corporate ACH formats carry structured remittance information, so invoice references arrive attached to the money rather than in a separate email (Nacha Operating Rules, checked September 2026). For a business matching dozens of receipts a month, that is the difference between a morning and a week.

Faster payment terms become negotiable. A customer who can pay you in one business day at almost no cost has fewer grounds to insist on 60-day terms than one who has to raise an international wire.

None of this changes where your company is incorporated. It changes what your customer's finance team has to do to pay you, and that is usually the part of the sale nobody has priced.

Credits, debits and why the direction matters

ACH carries two kinds of transaction, and confusing them causes real problems.

An ACH credit is a push. The payer instructs their bank to send money. Payroll and supplier payments work this way. This is what your American customer means when they offer to pay you by ACH.

An ACH debit is a pull. The payee instructs the network to take money from the payer's account, under an authorisation the payer gave in advance. Subscriptions, utilities and recurring billing work this way.

If you are ever asked to give a US counterparty your account details so they can set up an ACH debit, understand what you are agreeing to: you are authorising them to withdraw. That is a different commercial position from being paid, and it belongs in the contract rather than in an email.

Speed, and what Same Day ACH delivers

Type	Settlement	Windows	Per-payment limit
Standard ACH	One to two business days	Overnight processing	No network limit
Same Day ACH	Same business day	Three submission windows each business day	1,000,000 US dollars

The Same Day ACH per-payment limit has been 1,000,000 US dollars since March 2022. Nacha has approved an increase to 10,000,000 US dollars, taking effect on 17 September 2027 (Nacha, checked September 2026).

"Same day" means the same business day, in the United States, before that day's final submission window. A payment released in New York on Friday afternoon after the last window settles on Monday. A payment released during an American public holiday does not settle at all that day. If your cash flow depends on the arrival date, the calendar you need is the US banking calendar, not yours.

Returns: the part nobody warns you about

An ACH payment can be reversed after it has settled. This is the most important structural difference between ACH and a wire, and it is the reason many exporters prefer a wire for large or first-time transactions.

Each return carries a code. R01 means insufficient funds. R02 means the account is closed. R29 means a corporate customer has told its bank the debit was not authorised.

The return windows differ by the type of transaction. Most business-to-business returns must be made within two banking days of settlement. Unauthorised consumer debits can be returned for 60 calendar days (Nacha Operating Rules, checked September 2026). Verify the current window that applies to your transaction type with the receiving institution before you rely on it, because the rules are amended annually.

The practical consequence: money that has arrived in a US account by ACH is not settled in the sense that a wire is settled. For a first order with a new counterparty, or for an amount that would hurt to lose, a wire removes that exposure.

The international question

There is an ACH transaction type called IAT, for International ACH Transaction. Its existence causes a lot of confusion, so it is worth being precise.

IAT is a format, not a rail to your country. It carries the extra originator and beneficiary data required under United States regulation for payments that touch a foreign financial agency, so that sanctions screening can be performed. The payment still enters or leaves through a US financial institution, which then arranges the international leg by other means, usually correspondent banking.

So an IAT does not let an American company pay directly into your bank in Cairo. It lets their bank record and screen the payment properly on its way out.

What this means for your business

If your customers are American and you are not, you are choosing between two things.

Route	How it reaches you	Cost to the payer	Speed	What you should watch
International wire over SWIFT	Correspondent chain into your local USD account	A per-payment wire fee set by their bank, plus deductions in transit	One to five business days	Deductions from the principal, and whether the charge option is OUR or SHA
ACH into US account details held in your name	Domestic US payment, then a transfer or conversion under your control	A fraction of a wire fee, set by their bank	One to two business days for the US leg	Return exposure, and eligibility for the account details

The second route is what most American buyers expect, and offering it removes a real point of friction in a sale. It requires having US dollar account details that can receive a domestic ACH credit, which is a separate question from where your company is incorporated.

The cost anatomy of a cross-border payment shows how the two routes compare once conversion is included, which is usually where the difference lands.

How TrillioniPay handles it

TrillioniPay is a Canadian FINTRAC-registered money services business. It is not a bank. Account and payment infrastructure is provided through regulated financial partners.

TrillioniPay's first account product is a named euro IBAN issued through a regulated financial partner in Lithuania, reachable by SEPA and by SWIFT. US dollar and pound sterling account details are offered to eligible customers following review, rather than by default at account opening. That sequencing is deliberate, and the review is a real one.

Where a US dollar payment reaches you by wire rather than by ACH, TrillioniPay shows its own charge before the payment is confirmed and cannot show another institution's. Availability depends on eligibility, KYC/KYB and compliance approval, and on partner coverage at the time your account opens.

Frequently asked questions

Can an American company send an ACH payment to my bank account in Egypt? No. ACH settles between US financial institutions. The payment has to land in a US account first.

Is ACH the same as a wire transfer? No. A wire is an individual, real-time, generally irrevocable transfer between banks. ACH is a batched transfer that settles on a schedule and can be returned after settlement.

What is a routing number? A nine-digit code, sometimes called an ABA routing number, that identifies a US financial institution. It is the American equivalent of the role a BIC or a sort code plays elsewhere. The United States does not use IBANs.

Is Same Day ACH instant? No. It settles within the same US business day, in scheduled windows. Instant settlement in the United States runs on different networks, RTP and FedNow, which are not ACH.

Why do my American customers push back on paying by wire? Cost and habit. A domestic ACH credit costs their business close to nothing and a wire costs them a fee per payment. For a supplier they pay monthly, that difference is visible in their own reporting.

Can I be paid by ACH if my company is not registered in the United States? That depends on the provider and on their eligibility rules, and it is a compliance question rather than a technical one. Any provider that answers yes without asking about your business is not one to rely on.

Sources

Nacha, ACH Network volume and value statistics, second quarter 2026. Checked September 2026.
Nacha, Same Day ACH per-payment limit increase to 10 million US dollars effective 17 September 2027, and the history of the limit including the March 2022 increase to 1 million. Checked September 2026.
Nacha Operating Rules, return reason codes and return timeframes. Checked September 2026.