Cloudways is a Pay As You Go service, so you pay only for the resources you consume. We charge in arrears and issue invoices in the first week of every month for the services rendered in the previous month. Therefore, the option of changing the billing date is currently unavailable.
But, you can add funds in advance for up to 12 months as per your current monthly usage (view your estimated next invoice amount using the Real-time Billing feature). Once the funds are added, your future invoices will be adjusted automatically from the available funds until they are depleted.