Three payments sent across the day and all three show up at once, overnight, with the same timestamp. It is neither a coincidence nor a bank problem: it is how a system that processes in batches works.
What it actually is
ACH is an automated clearing house: a system that collects operations, groups them, and settles them in batches at set moments, rather than handling them one by one as they arrive.
How it differs from a wire
| ACH | Wire transfer | |
|---|---|---|
| How it is processed | In batches | Operation by operation |
| Typically used for | Recurring and domestic payments | Urgent and international payments |
| What sets the timing | The batch cut-off | The sending time and the legs it crosses |
Why the moment you send matters
A batch system has cut-offs. A payment entering just before the cut-off travels in that batch; one entering just after waits for the next. That explains why two transfers made twenty minutes apart settle at different times.
The name is American, the model isn't
ACH is what it is called in the United States. Many countries run equivalent clearing systems under other names, and the batch logic repeats: grouping is more efficient than handling each operation separately.
Where you will be asked for it
Almost never directly. Usually it shows up as the method a platform pays you by, or as a slower and cheaper collection option next to the urgent alternative.
Related terms
Its individual counterpart is the wire transfer, and the European euro equivalent is SEPA. The rest is in the glossary.
This is not financial, legal, tax, or investment advice.
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Frequently asked questions
Is ACH cheaper than a wire?
The batch model tends to be more efficient than processing each operation separately, and that usually shows in the price, but the specific terms are set by each provider. What is structural is the difference in urgency: one waits for its batch and the other does not.
Why did my payment wait until the next day?
Because it arrived after its batch cut-off. In a batch system there are moments when the batch closes, and anything entering afterwards waits for the next one, even with the system running normally.
Does it work for getting paid from abroad?
It depends on the country and the provider. Batch clearing systems are usually domestic, so an international payment normally travels a different road. Which road your payment takes is set by the source, not by you.
Informational content. This does not constitute financial, legal, tax or investment advice.
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