How do I change the category for a transaction?

From Mint.com:

  1. Sign in to Mint and select Transactions near the top of the page.
  2. Choose the transaction you’d like to update and select its existing category.
  3. Select the arrows that appear next to the category name.
  4. Find and select the new category you’d like to use.
  5. Your changes are automatically saved.

From the Mint app:

  1. Select the Transactions heading.
  2. Select the transaction you’d like to hide.
  3. Select its category.
  4. Find and select the new category you’d like to use.
  5. Your changes are automatically saved.

You can also create a new category. If you want Mint to use this category for all future transactions from this merchant, you can create a rule.