ACH
ACH is a payment processing network used to move money in bulk between banks.
By Geoffrey Lyons
Published on Apr 18, 2025
Last modified on Feb 26, 2026

ACH is a payment processing network used to move money in bulk between banks.
Think of it like a school bus for money. Instead of sending each kid (or dollar) individually, it fills up with passengers one by one and then drops everyone off at once.
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What problem did ACH solve?
In order to process a large number of transactions, banks need to be able to clear and settle payments.
