If you’ve linked a Debit card:

Debit transactions will be processed almost immediately upon completing your purchase, however depending on the bank, it may take 1-2 business days. You will see it as a pending transaction on your debit card statement, and after a couple of days it will change from "pending" to "posted."

If you’ve linked a bank account:

Bank transfers (ACH) can take 1-3 business days to process. You'll see it on your bank statement once the payment has been processed. You will not see it as a pending transaction beforehand like you sometimes see with credit card transactions.