ACH vs eCheck at a glance
| ACH payment | eCheck | |
|---|---|---|
| What the word means | Any payment that moves through the ACH network | An everyday name for an ACH payment |
| Is it an official term? | Yes. It is used in the Nacha rules | No. Nacha lists it as another name for an ACH payment |
| Direction | Credits and debits | A debit, in the two company guides we checked: a payment taken from the payer’s account |
| Network | The ACH network | The ACH network |
| Details needed | Routing number, account number, name and account type | The same |
What eCheck means
eCheck is short for electronic check. Nacha says ACH payments are also known as direct debit, EFT, electronic bank transfer and eCheck. So the word does not name a separate payment system.
Payment companies that sell an eCheck service describe it the same way. These two examples are from each company’s own page, checked on October 2, 2026.
| Company | What its page says an eCheck is |
|---|---|
| Authorize.net | A digital version of a paper check. Money moves from the customer’s checking account to the business, using the ACH network |
| PayPal | A digital version of a paper check that moves money between bank accounts through the ACH network |
PayPal’s page adds that an eCheck is a form of ACH payment, but not every ACH payment is an eCheck. Both pages describe a payment that a customer makes from a bank account by typing in the bank details online.
What an ACH check is
“ACH check” is not a term from the ACH rules, and we found no official definition. People use it in two ways.
- For an eCheck. A payment from a checking account that you authorize by giving your routing and account numbers.
- For a paper check that became an ACH payment. You wrote a check, and the company used the numbers on it to send an ACH debit. On your statement the payment may be listed as ACH, not as a check.
If a company asks you for an “ACH check”, ask whether it wants your bank details for an ACH payment or a paper check.
How a paper check becomes an ACH payment
A company can use a paper check as the source of the numbers for a one-time ACH debit. The federal rule on electronic payments, Regulation E, calls this an electronic fund transfer using information from a check. The official commentary calls it electronic check conversion.
The ACH rules have a payment type for each case.
| Code | Name | When it is used |
|---|---|---|
| ARC | Accounts Receivable Entry | A check received by mail, at a lockbox or a drop box, for a bill |
| BOC | Back Office Conversion | A check handed over at the counter and converted later in the back office |
| POP | Point-of-Purchase Entry | A check converted at the counter while the customer is there |
| RCK | Re-presented Check Entry | A bounced check collected again as an ACH debit |
For ARC, BOC and POP on a personal account, Regulation E says the company must give notice that the check will or may be processed as an electronic transfer. You authorize the transfer when you get the notice and go ahead with the payment.
RCK is different. Regulation E does not cover a bounced check that is presented again electronically, because the payment started as a check. It does cover a fee that a company takes electronically because the check bounced.
The Office of the Comptroller of the Currency, a US bank regulator, gives two examples. A credit card company may convert a check you mail to it. A store clerk may scan your check, stamp it “void” and hand it back.
More about this is in ACH vs check and in a check that shows as ACH.
Which ACH payment type an eCheck is
How you gave your permission decides the payment type the business uses.
| How you authorized the payment | ACH payment type (SEC code) |
|---|---|
| Online, on a website or a phone app | WEB |
| In a phone call | TEL |
| In writing, on a form you sign | PPD |
Each one is an ACH debit, and each one needs your authorization first. The types are explained in ACH SEC codes.
How long an eCheck takes
An eCheck moves at the speed of ACH. A debit settles the same day or the next banking day. ACH does not settle on weekends or Federal Reserve holidays.
A business may not see the money that fast. A debit can be returned after it settles, so a payment company may wait before it pays out. PayPal’s guide says an eCheck typically takes 3 to 5 business days to process. That is the provider’s own timetable, not a rule of the network. See how long an ACH transfer takes.
If an eCheck fails
An eCheck can come back unpaid, as a paper check can. The customer’s bank returns it with a code that gives the reason.
| Why it came back | Code |
|---|---|
| Not enough money in the account | R01 |
| The account is closed, or was not found | R02, R03 |
| The customer says they did not authorize it | R10 |
Look up any code in the ACH return codes list.
Which word to use
- Talking to a bank or a payment processor: say ACH. It is the exact name of the service.
- Talking to customers: use the word they know. “Pay by eCheck” and “pay from your bank account (ACH)” describe the same payment.
- On a form: ask for the routing number, the account number, the name on the account and the account type. Our ACH authorization form has a line for each.
Common mistakes
- Thinking an eCheck is a different network. It travels through the ACH network.
- Expecting an eCheck to clear at once. It settles on a banking day, and it can still be returned.
- Giving a debit card number for an eCheck. An eCheck uses the routing number and the account number.
- Taking an eCheck with no authorization. It is an ACH debit, and the customer must agree to it first.
- Asking your bank for the paper check back. The OCC says a company that converts a check generally destroys the paper and keeps only an image.