Hi Daoteo, With adCenter, there is no prepay options availble. You are billed according to your billing cycle date or your current threshold amount by credit card only. If you do have any additional questions please contact our support teams. United States: Telephone: (800) 518-5689 6:00am-18:00pm PST seven days a week Easy Assist Remote Desktop Assistance: (866) 783-1045 Email: https://support.adcenter.msn.com/eform.aspx?productKey=adcenterss&ct=eformts United Kingdom: Telephone: 0800 633 5915 08:00 – 18:00 (UK) Monday – Sunday Email: https://support.adcenter.msn.com/eform.aspx?productKey=adcenterss&ct=eformts Canada Support: Telephone: (800) 985-4671 6:00am-18:00pm PST seven days a week Email: https://support.adcenter.msn.com/eform.aspx?productKey=adcenterss&ct=eformts Singapore Support: Telephone: (800) 518-5689 9:00 am – 11:00 am SST Monday through Friday Email: https://support.adcenter.msn.com/eform.aspx?productKey=adcenterss&ct=eformts Thank you, Brian H - MSFT