Because we have no term commitments or contracts, all of our hosted services are billed monthly and can be cancelled at any time. Only domain names and SSL certificates are annually renewing items.
Or, if you pay by check, you can send payment in excess of the invoice you are paying, and the excess will be applied to your credit balance, and then automatically credited to invoices generated in the future.
Please note that there are no refunds, so be absolutely sure you plan to use our services for the length of time you are pre-paying.