In general, all plan changes are processed on a proportionate basis. What this means is that for Shared/Reseller plans, we take into account the price paid for your old plan, the price that should be paid for the new plan, and calculate the difference. So depending on the outcome, we will either issue an invoice for the difference between the two plans, or issue a refund to your Namecheap Account balance.
If your hosting package is already overdue, you will pay for the used days of your old plan, and the remaining days of your new plan.
Should you upgrade from a Shared/Reseller package to a VPS/Dedicated Server or vice-versa, we will issue a proportionate refund for the unused days of your old plan.If you have any further questions, please contact our Live Chat support or submit a ticket to our Billing team.