By signing up for direct debit (autogiro), you avoid invoice fees. We withdraw the payment on the due date and you don´t risk missing any payments.
To sign up for direct debit you log into your online bank. Find the Payments/Transfers menu, go to Direct debit (Autogiro) and search for B2 Impact. Please note that some banks require you to log in via a browser in order to be able to activate direct debit.