How to Add a Subtask in Microsoft Project

Quick summary

Adding a subtask in Microsoft Project lets you break large tasks into manageable work items nested under a parent summary task. Use the Indent Task button on the Task tab to convert any task into a subtask instantly.

Steps

1. Open Microsoft Project and create the initial tasks for your project.
2. Add durations to your tasks to support accurate timeline planning.
3. Click on the task you want to convert into a subtask, making sure it is positioned directly below its intended parent task.
4. On the Task tab, locate and click the Indent Task button (the right-facing arrow icon).
5. The selected task is now a subtask, and the task above it automatically becomes its summary task.