jscongdon said: R46.12 here (Deluxe version) So, as you said, I added a mortgage manually, and it 100% works. The account I'm having an issue with was linked via the lender. Figured that would work, bringing in all the other costs other than just the calculated principal and interest. And since I pay extra towards the principal, it should update my balance accordingly. Programatically, I'm not sure how the application can be confused. It knows a balance; it nows the loan terms - you would think it would apply the same math.