Upgrades start immediately and charge a prorated amount for the rest of the billing period. Downgrades start on the next billing date. A cancelled subscription stays active until the end of the current period and can be reactivated before then.Top-up credits are available to paid-plan subscribers and do not expire.
If you are mid-build, make sure you have enough credits to finish the work. If a subscription change affects credits, wait for the dashboard to show the updated balance before retrying failed operations.If you are unsure which plan fits, start with the amount of site work you expect to do this month rather than trying to predict every future use case.