Hi Kirkber,
It's a good thing that you've asked first before deleting your bank account. I'll share insights about it.
Deleting a bank or credit card account will also remove the transactions under it whether they are categorized or not. What you can do is hide your account so your transactions will be kept or export your transactions to Excel and import them after deleting the account. However, importing them means you need to categorize them again.
Hide an account:
- Select the Profile ⚙ icon and then Bank Accounts.
- Find the account you want to hide.
- In the Show Account section, select the toggle to OFF.
Export transactions to Excel:
- Go to Transactions.
- Change the Type to All and select the account in concern.
- Set the Date to All and click the Export icon on the right.
- Save the file on your computer.

Delete the account, and then import the transactions afterward.
- Go to the Profile ⚙ icon.
- Click Import transactions.
- Choose the Import transactions at the bottom. However, if you've been importing transactions before, you'll want to click the Import older transactions on the Cash account.

You can also consider creating rules to speed up the process of reviewing your transactions.
Feel free to comment below if you have other questions in mind. Take care and good evening!