ACH payments workflow
ACH payments take up to 5 business days to receive acknowledgment of their success or failure:
When created, ACH charges will have the initial status of pending that is reflected in the Billing section of a project
During the next 4 business days, the payment will either transition to succeeded or failed depending on your clients' bank.
Successful/Confirmed ACH payments will then be scheduled for automatic Outbound Transfer.
Your client will see the payment reflected on their bank statement 1-2 days after creating the charge. (Your customer will know the payment succeeded before the bank notifies Stripe.)
Failures can happen for a number of reasons such as: insufficient funds, a bad account number, or the customer disabled debits from their bank account.