An ACH transfer is an electronic payment between US bank or credit union accounts, sent in batches through the Automated Clearing House (ACH) Network. As of September 2026, Nacha estimates 80% of ACH payments settle in one banking day or less. When you pay for crypto from a US bank account, that timing affects when your order can complete.
How does an ACH transfer work?
An ACH transfer moves money between US bank and credit union accounts over the Automated Clearing House (ACH) Network. Banks send each other ACH payments in batches, according to the Federal Reserve (as of September 2026).
Nacha, which governs the network and writes its rules, names five parties in an ACH payment:
- Originator: starts the payment.
- ODFI (Originating Depository Financial Institution): the originator’s bank.
- ACH Operator: routes the payment. There are two: the Federal Reserve and The Clearing House.
- RDFI (Receiving Depository Financial Institution): the receiver’s bank or credit union.
- Receiver: the account holder who is paid or charged.
An ACH credit pushes money into an account, as with a direct deposit of wages. An ACH debit pulls money out of an account whose owner has authorized it, as with a utility bill. Nacha estimates that 80% of ACH payments settle in one banking day or less (as of September 2026).
What is an example of an ACH transfer?
An illustration: you pay a bill from your checking account.
- You give the company your routing and account numbers and authorize a debit.
- The company, the originator, sends the debit to its bank, the ODFI.
- An ACH operator routes it to your bank, the RDFI.
- Your bank takes the money: on the same banking day with Same Day ACH, or on a later banking day.
Why does ACH matter when you buy crypto?
ACH timing affects when a bank-funded purchase can complete: a crypto service may wait for your payment to settle before it sends the coins. Times vary by payment method; see how long it takes to buy crypto.
Payment options on Coinmama depend on your country, so check the supported payment methods before you order. Coinmama does not add its own fee. All fees are shown before you confirm your order. When you are ready, you can see crypto prices and payment options on Coinmama.
How is an ACH transfer different from a wire transfer?
An ACH transfer travels in batches, while a wire transfer is settled one payment at a time. On the Federal Reserve’s Fedwire Funds Service, a payment is final and irrevocable once processed (as of September 2026).
| Feature | ACH transfer | Wire transfer (Fedwire) |
|---|---|---|
| How payments move | In batches between banks | One at a time |
| Typical timing | 80% settle in one banking day or less; Same Day ACH settles the same banking day | Settled in real time, Monday to Friday except designated holidays |
| Typical use | Direct deposits and bill payments | Large-value, time-critical payments |
What are the risks and red flags?
Your bank details give access to your money, so watch for these red flags:
- Debit authorizations: your routing and account numbers let a company pull money from your account. Share them only with services you trust.
- Unauthorized debits: if your statement shows a debit you did not authorize, tell your bank right away. Under the CFPB’s guidance on unauthorized transactions, US consumers must report it within 60 days after that statement is sent (as of September 2026).
- Payments you send: money you push to someone else can be hard to get back. Check the recipient before you pay.
- Pressure to pay: be wary of anyone who asks you to send a bank transfer and buy crypto for them, or who promises big profits. See how to protect yourself from fraud.
Go deeper: read how to buy crypto for the whole process, from payment to wallet.
