Fix: Table of Contents Not Updating in Word

Why the Table of Contents Won’t Update

The table of contents (TOC) in Word is a field code that reads your heading styles and generates the TOC. It breaks when headings use manual formatting instead of styles, or when the field itself becomes corrupted.

Step-by-Step Fix

Step 1: Update the Field

1. Click anywhere inside the table of contents
2. Right-click and select Update Field
3. Choose Update entire table (not just page numbers)
4. Click OK

Step 2: Verify Heading Styles

The TOC only recognizes built-in Heading styles:

1. Click on each heading in your document
2. Check the Styles gallery on the Home tab
3. The heading should show as Heading 1, Heading 2, or Heading 3
4. If it shows “Normal” or a custom style, click the correct Heading style to apply it

Step 3: Re-Insert the TOC

If the TOC is corrupted:

1. Click inside the TOC and press Ctrl+Shift+End to select it all
2. Press Delete
3. Go to References > Table of Contents
4. Choose a built-in TOC style
5. The TOC regenerates from your heading styles

Step 4: Check TOC Settings

1. Go to References > Table of Contents > Custom Table of Contents
2. Verify Show levels is set to 3 (or however many levels you need)
3. Check that Formats is set to your preferred style
4. Click OK to regenerate

Common Mistakes

• Using bold/font size to create “headings” instead of Heading styles
• Copying content from other documents that brings in conflicting styles
• Having multiple TOC fields in the document (delete duplicates)
• Forgetting to update the TOC before printing or exporting to PDF