Begin with the date you can verify
Find the renewal date for each subscription and any notice period in your supplier agreement. The next monthly invoice is not necessarily the end of the commitment. If your annual subscriptions renew in January or February, start gathering the details around 90 days ahead. Microsoft 365 subscriptions do not all share those renewal dates.
Use the free renewal planner to work back from your confirmed dates. Give your team time to approve quantities, obtain quotes and agree supply. A planning reminder does not submit a cancellation, reserve a price or change your contract.