How do I permanently delete my Google ad account?

How to cancel your account
  1. Go to your Google Ads account Preferences.
  2. Click the Account Status section to expand it.
  3. Click Cancel my account.

How can I delete my ad account?

Steps to close an ad account:
  1. Go to Business Settings.
  2. Click on Accounts.
  3. Click on Ad Accounts.
  4. Select the ad account you’d like to close.
  5. Click Close Account.
  6. Click Close Ad Account to confirm you want to close this ad account.