[Kmymoney-devel] [Bug 264009] New: Loan interest not accounted for in forecast calculations. Causes incorrect forecast for loan accounts.

[Graham Watson]

https://bugs.kde.org/show_bug.cgi?id=264009

           Summary: Loan interest not accounted for in forecast
                    calculations. Causes incorrect forecast for loan
                    accounts.
           Product: kmymoney4
           Version: 4.5
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kmymoney-devel at kde.org
        ReportedBy: grahamw.home at gmail.com


Version:           4.5 (using KDE 4.5.5) 
OS:                Linux

The balance forecast reports, and the forecast report on the home page, both
incorrectly predict the balance for loans with an interest rate.

This doesn't only happen with 100% interest loans, but that seems to be the
most obvious way to demonstrate it.

This is quite a major bug, since it creates a drastically incorrect net worth
forecast, rendering using KMM unusable to do predictions or financial planning
with.

Reproducible: Always

Steps to Reproduce:
To reproduce, create a loan with an final balloon amount equal to the initial
amount. This should mean that the scheduled transaction is split as 100%
interest, 0% principal. Now go to the 'All accounts forecast by month' report,
or look at the 90-day forecast on the home page to view the forecast.

Actual Results:  
Both reports show the balance as decreasing.

Expected Results:  
Since the interest is equal to the scheduled payment, you would expect the
balance to remain the same on a monthly basis.

OS: Linux (x86_64) release 2.6.35-24-generic
Compiler: cc
Running Gnome under Ubuntu 10.10.

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