The payment process is automatically initiated on the 1st of every month if you have correctly filled out the invoice information and have generated at least €20 (2,000 coins).
Your payment will be transferred to your PayPal or bank account on the 15th of the following month. Additionally, you can download an invoice for your accounting purposes from your profile. So, if you earned €100 in August, you will receive that amount on September 15th.