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All Tutorials /Smartsheet

How to Add a Subtask in Smartsheet

Updated on:
June 5, 2026
By:
Madhav Bhandari
Use this interactive demo to learn how to create a subtask under an existing row in Smartsheet.

Quick summary

Adding a subtask in Smartsheet requires inserting a new row below a parent task and using the Indent button to nest it as a child row. This Grid View workflow takes just a few clicks and instantly structures your project hierarchy.


Steps

  1. In Smartsheet's Grid View, locate the main task row and click its Row Menu button.
  2. Select Insert Below from the dropdown list of row options.
  3. Enter the task details for the newly inserted row one by one.
  4. Select the newly added row once more to prepare it for indenting.
  5. Go to the top menu bar and click Indent to nest the row as a subtask.
  6. The subtask is now added instantly and nested under its parent task.

📌 Why this matters

Subtasks in Smartsheet allow teams to break complex projects into manageable, hierarchical steps directly within a Grid View sheet. By nesting child rows under parent tasks using the Indent feature, project managers can track dependencies, assign ownership, and maintain clear task structure without switching tools. This built-in subtask functionality makes Smartsheet a powerful solution for teams that need granular project planning and task management in a familiar spreadsheet-style interface.
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