How to categorize convenience fees for online property tax payments?

If paying property taxes with a credit card, and incurring a 3% “convenience fee” from the town to do so, should one include that 3% cost as part of the property tax when classifying the transaction? Or should one separate the 3% fee from the property tax classification? If separating, the closest classification option I saw was “bank fee”. Since it is not actually a “bank fee” could Stessa add another classification option, such as “convenience fee” or “credit card fee”?

Moving this thread to Investor Q&A since it’s more of a CPA/tax question than a new feature request.