Upgrading
An upgrade takes effect the moment you confirm it. You are charged the difference between the two plans for the days left in the current period, not a fresh full month — so upgrading on the 25th costs a few days, not thirty.
Your new limits are live immediately. There is no re-provisioning and no downtime.
Downgrading
A downgrade takes effect at your next renewal, and you keep everything you have paid for until then. We do this rather than refunding the difference because a downgrade usually means reducing limits, and applying that instantly can break a site that is currently using them.
Before a downgrade lands, check what you are using against the new plan's limits in Billing → Plan. If you are over one of them at renewal, we email you first — nothing is deleted without warning.
Cancelling
A cancellation is a downgrade to nothing: you keep the service to the end of the period you have paid for. Your data stays available for the retention window shown on the cancellation screen, so a change of mind does not cost you the site.