Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Double-entry accounting: how to keep track of mortgage installments as expenses?
Because a paying down a liability and thus gaining asset equity is not technically an expense, GnuCash will not include it in any expense reports. However, you can abuse the system a bit to do what you want.  The mortgage payment should be divided into principle, interest, and escrow / tax / insurance accounts. For example: A mortgage payment will then be a split transaction that puts money into these accounts from your bank account: For completeness, the escrow account will periodically be used to pay actual expenses, which just moves the expense from escrow into insurance or tax. This is nice so that expenses for a month aren't inflated due to a tax payment being made: Now, this is all fairly typical and results in all but the principle part of the mortgage payment being included in expense reports. The trick then is to duplicate the principle portion in a way that it makes its way into your expenses. One way to do this is to create a principle expense account and also a fictional equity account that provides the funds to pay it: Every time you record a mortgage payment, add a transfer from this equity account into the Principle Payments expense account. This will mess things up at some level, since you're inventing an expense that does not truly exist, but if you're using GnuCash more to monitor monthly cash flow, it causes the Income/Expense report to finally make sense. Example transaction split: