Custom Template Creation from Premium Plan

Your observation matches the current support boundary: custom templates can be published from group-backed basic plans, while premium plans are not supported. Microsoft’s documentation provides no rollout date for premium-template creation, so there is no reliable date to quote. Converting the plan to basic would defeat your requirement because advanced dependencies and scheduling features are premium-only. Use the premium plan itself as the controlled master. Open its menu and choose Duplicate plan for each new project; Planner supports copying premium plans and carries task structure, buckets, dates, descriptions, checklists, labels, and same-group attachments while resetting task status. Test one duplicate and verify dependencies, assignments, calendars, and attachments before making it your PMO process. Keep the master read-only by convention and restrict ownership where possible. Track the Microsoft 365 roadmap and Planner release notes for a supported change; avoid rebuilding the template in basic unless losing dependencies is acceptable.if