You will get charged every 4 weeks for the duration of your payment plan. The exact dates depends on when your first set of aligners are ready to ship. If you would like to know when your payments will be auto-deducted, please wait until you get a message that your aligners a ready to ship and then contact our customer support. They will then be able to help you further. If you require other payment related information, feel free to contact us any time.